/* ==================== BRAND IDENTITY & THEME TOKEN SYSTEM ==================== */
/* Comprehensive centralized design system with full color scales and tokens */

:root {
    /* ========== PRIMARY BRAND COLORS ========== */
    --color-primary: #4CAF50;
    --color-primary-dark: #3d8b40;
    --color-primary-light: #66bb6a;
    --color-primary-lighter: #81c784;
    
    /* ========== SECONDARY BRAND COLORS ========== */
    --color-secondary: #2196F3;
    --color-secondary-dark: #1976D2;
    --color-secondary-light: #42A5F5;
    
    /* ========== ACCENT COLORS ========== */
    --color-accent: #FF9800;
    --color-accent-dark: #F57C00;
    --color-accent-light: #FFB74D;
    --color-success: #4CAF50;
    --color-warning: #FF9800;
    --color-error: #F44336;
    --color-info: #2196F3;
    
    /* ========== NEUTRAL COLOR SCALE (Gray 50-900) ========== */
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e0e0e0;
    --gray-400: #bdbdbd;
    --gray-500: #9e9e9e;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    /* ========== DARK THEME (default) ========== */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --bg-elevated: #2a2a2a;
    --bg-overlay: rgba(0, 0, 0, 0.75);
    
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-tertiary: #808080;
    --text-disabled: #666666;
    
    /* Game Colors */
    --snake-color: var(--color-primary);
    --snake-glow: rgba(76, 175, 80, 0.5);
    --food-color: #FF4444;
    --border-color: var(--color-primary);
    
    /* Modern Button System */
    --btn-bg: var(--color-primary);
    --btn-hover-bg: var(--color-primary-dark);
    --btn-active-bg: #2e7d32;
    --btn-disabled-bg: var(--gray-800);
    --btn-disabled-text: var(--gray-600);
    --btn-text: #ffffff;
    --btn-hover: var(--color-primary-dark);
    --btn-active: #2e7d32;
    --btn-disabled: var(--gray-800);
    
    /* Modern Overlays & Modals */
    --overlay-bg: rgba(0, 0, 0, 0.75);
    --modal-bg: rgba(0, 0, 0, 0.85);
    --modal-content-bg: #1f1f1f;
    --modal-backdrop-blur: blur(20px);
    
    /* Control Elements */
    --control-bg: rgba(76, 175, 80, 0.15);
    --control-active: rgba(76, 175, 80, 0.4);
    
    /* UI Scaling */
    --ui-scale: 1.0;
    
    /* Text scaling */
    --text-scale: 1.0;
    --text-size: 1.0;
    font-size: calc(1rem * var(--text-size) * var(--text-scale));
    
    /* ========== SPACING SCALE TOKENS ========== */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    /* ========== BORDER RADIUS TOKENS ========== */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;
    
    /* ========== FONT SCALE TOKENS ========== */
    --font-xs: 0.75rem;    /* 12px */
    --font-sm: 0.875rem;   /* 14px */
    --font-base: 1rem;     /* 16px */
    --font-lg: 1.125rem;   /* 18px */
    --font-xl: 1.25rem;    /* 20px */
    --font-2xl: 1.5rem;    /* 24px */
    --font-3xl: 1.875rem;  /* 30px */
    --font-4xl: 2.25rem;   /* 36px */
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.6;
    --line-height-loose: 2;
    
    --letter-spacing-tight: -0.02em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.01em;
    
    /* ========== SHADOW/ELEVATION TOKENS ========== */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.25);
    --shadow-2xl: 0 16px 48px rgba(0, 0, 0, 0.3);
    
    --shadow-elevation-1: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-elevation-2: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-elevation-3: 0 8px 16px rgba(0, 0, 0, 0.2);
    --shadow-elevation-4: 0 12px 24px rgba(0, 0, 0, 0.25);
    
    /* ========== FOCUS INDICATORS ========== */
    --focus-outline: 3px solid var(--color-primary);
    --focus-outline-offset: 3px;
    --focus-outline-radius: 8px;
    --focus-ring: 0 0 0 3px rgba(76, 175, 80, 0.3);
    
    /* ========== ANIMATION TIMING ========== */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-slower: 500ms ease;
    
    /* ========== Z-INDEX LAYERING ========== */
    --z-base: 1;
    --z-overlay: 10;
    --z-modal: 1000;
    --z-modal-content: 1001;
    --z-popup: 2000;
    --z-tooltip: 3000;
    --z-debug: 9999;
    --z-max: 10000;
    
    /* ========== GLOBAL UI REDESIGN - GRADIENT TOKENS ========== */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.3) 100%);
    
    /* Enhanced shadows with color */
    --shadow-colored: 0 8px 24px rgba(76, 175, 80, 0.15);
    --shadow-colored-lg: 0 12px 32px rgba(76, 175, 80, 0.2);
}

/* ========== LIGHT THEME ========== */
[data-theme="light"] {
    --bg-primary: var(--gray-50);
    --bg-secondary: #ffffff;
    --bg-tertiary: var(--gray-100);
    --bg-elevated: var(--gray-200);
    --bg-overlay: rgba(255, 255, 255, 0.9);
    
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --text-tertiary: var(--gray-600);
    --text-disabled: var(--gray-400);
    
    /* Game Colors */
    --snake-color: #2e7d32;
    --snake-glow: rgba(46, 125, 50, 0.3);
    --food-color: #d32f2f;
    --border-color: #2e7d32;
    
    /* Modern Button System */
    --btn-bg: #2e7d32;
    --btn-hover: #1b5e20;
    --btn-active: #155a1a;
    --btn-disabled: var(--gray-300);
    --btn-disabled-text: var(--gray-500);
    --btn-text: #ffffff;
    
    /* Modern Overlays & Modals */
    --overlay-bg: rgba(255, 255, 255, 0.9);
    --modal-bg: rgba(255, 255, 255, 0.95);
    --modal-content-bg: #ffffff;
    
    /* Control Elements */
    --control-bg: rgba(46, 125, 50, 0.15);
    --control-active: rgba(46, 125, 50, 0.4);
    
    /* Modern Shadows (Lighter for Light Theme) */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.2);
    --shadow-2xl: 0 16px 48px rgba(0, 0, 0, 0.25);
    
    --shadow-elevation-1: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-elevation-2: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-elevation-3: 0 8px 16px rgba(0, 0, 0, 0.15);
    --shadow-elevation-4: 0 12px 24px rgba(0, 0, 0, 0.2);
}

/* ========== DARK CLASS SUPPORT (alternative to data-theme) ========== */
/* Support both .dark class and [data-theme="dark"] for compatibility */
html.dark,
html[data-theme="dark"] {
    /* Dark theme is default in :root, so no overrides needed unless light was set */
}

html.light,
html[data-theme="light"] {
    /* Light theme variables are already defined in [data-theme="light"] above */
    --bg-primary: var(--gray-50);
    --bg-secondary: #ffffff;
    --bg-tertiary: var(--gray-100);
    --bg-elevated: var(--gray-200);
    --bg-overlay: rgba(255, 255, 255, 0.9);
    
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --text-tertiary: var(--gray-600);
    --text-disabled: var(--gray-400);
    
    /* Game Colors */
    --snake-color: #2e7d32;
    --snake-glow: rgba(46, 125, 50, 0.3);
    --food-color: #d32f2f;
    --border-color: #2e7d32;
    
    /* Modern Button System */
    --btn-bg: #2e7d32;
    --btn-hover: #1b5e20;
    --btn-active: #155a1a;
    --btn-disabled: var(--gray-300);
    --btn-disabled-text: var(--gray-500);
    --btn-text: #ffffff;
    
    /* Modern Overlays & Modals */
    --overlay-bg: rgba(255, 255, 255, 0.9);
    --modal-bg: rgba(255, 255, 255, 0.95);
    --modal-content-bg: #ffffff;
    
    /* Control Elements */
    --control-bg: rgba(46, 125, 50, 0.15);
    --control-active: rgba(46, 125, 50, 0.4);
    
    /* Modern Shadows (Lighter for Light Theme) */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.2);
    --shadow-2xl: 0 16px 48px rgba(0, 0, 0, 0.25);
    
    --shadow-elevation-1: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-elevation-2: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-elevation-3: 0 8px 16px rgba(0, 0, 0, 0.15);
    --shadow-elevation-4: 0 12px 24px rgba(0, 0, 0, 0.2);
}

/* ========== ANIMATED THEME TRANSITIONS ========== */
/* Smooth 300ms transitions for theme switching */
/* Only applied when .theme-transition class is present */
.theme-transition *,
.theme-transition *::before,
.theme-transition *::after {
    transition:
        background-color 0.3s ease,
        background 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        border-top-color 0.3s ease,
        border-right-color 0.3s ease,
        border-bottom-color 0.3s ease,
        border-left-color 0.3s ease,
        fill 0.3s ease,
        stroke 0.3s ease,
        box-shadow 0.3s ease,
        outline-color 0.3s ease !important;
}

/* Ensure body and html also transition */
.theme-transition,
.theme-transition body {
    transition:
        background-color 0.3s ease,
        background 0.3s ease,
        color 0.3s ease !important;
}

/* Optional: Soft fade effect during transition */
.theme-transition body {
    opacity: 1;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .theme-transition *,
    .theme-transition *::before,
    .theme-transition *::after {
        transition: none !important;
    }
    
    .theme-transition,
    .theme-transition body {
        transition: none !important;
    }
}

/* ========== COLORBLIND-SAFE VARIANTS ========== */
[data-colorblind="protanopia"] {
    --snake-color: #00a8ff;
    --food-color: #ff6b6b;
    --border-color: #00a8ff;
    --btn-bg: #00a8ff;
    --btn-hover-bg: #0097e6;
}

[data-colorblind="deuteranopia"] {
    --snake-color: #00a8ff;
    --food-color: #ff6b6b;
    --border-color: #00a8ff;
    --btn-bg: #00a8ff;
    --btn-hover-bg: #0097e6;
}

[data-colorblind="tritanopia"] {
    --snake-color: #4CAF50;
    --food-color: #ff5252;
    --border-color: #4CAF50;
    --btn-bg: #4CAF50;
    --btn-hover-bg: #45a049;
}

/* ========== HIGH-CONTRAST MODE ========== */
[data-high-contrast="true"] {
    --bg-primary: #000000;
    --bg-secondary: #000000;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --border-color: #ffffff;
    --btn-bg: #ffffff;
    --btn-text: #000000;
    --btn-hover: #cccccc;
    --snake-color: #00ff00;
    --food-color: #ff0000;
    --focus-outline: 4px solid #ffffff;
    --focus-outline-offset: 4px;
}

[data-high-contrast="true"][data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f5f5f5;
    --text-primary: #000000;
    --text-secondary: #000000;
    --border-color: #000000;
    --btn-bg: #000000;
    --btn-text: #ffffff;
    --btn-hover: #333333;
    --snake-color: #008000;
    --food-color: #cc0000;
    --focus-outline: 4px solid #000000;
}

/* ==================== PHASE-2 POLISHING STYLES ==================== */

/* Debug Overlay */
.debug-overlay {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    max-width: 800px;
    max-height: 80vh;
    background: var(--modal-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    z-index: 10000;
    display: none;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.debug-overlay.show {
    display: flex;
}

.debug-overlay-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.debug-overlay-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.debug-close-btn, .debug-clear-btn {
    background: var(--btn-bg);
    color: var(--btn-text);
    border: none;
    padding: 5px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    margin-left: 10px;
}

.debug-close-btn:hover, .debug-clear-btn:hover {
    background: var(--btn-hover);
}

.debug-overlay-content {
    flex: 1;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
    color: var(--text-primary);
}

.debug-log-empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
}

.debug-log-entry {
    padding: 8px;
    margin-bottom: 5px;
    border-left: 3px solid transparent;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
}

.debug-log-entry.debug-log-log {
    border-left-color: #4CAF50;
}

.debug-log-entry.debug-log-warn {
    border-left-color: #ffaa00;
    background: rgba(255, 170, 0, 0.1);
}

.debug-log-entry.debug-log-error {
    border-left-color: #ff0000;
    background: rgba(255, 0, 0, 0.1);
}

.debug-log-entry.debug-log-debug {
    border-left-color: #00aaff;
}

.debug-log-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
}

.debug-log-type {
    font-weight: bold;
    color: var(--text-secondary);
}

.debug-log-time {
    color: var(--text-secondary);
    font-size: 0.9em;
}

.debug-log-message {
    color: var(--text-primary);
    word-break: break-word;
}

.debug-log-metadata {
    margin-top: 5px;
    padding: 5px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--text-secondary);
    white-space: pre-wrap;
}

/* Performance Profiler */
.profiler-overlay {
    position: fixed;
    top: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 15px;
    z-index: 9999;
    display: none;
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
    min-width: 200px;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
}

.profiler-overlay.show {
    display: block;
}

.profiler-content {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.profiler-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
}

.profiler-label {
    color: var(--text-secondary);
    margin-right: 10px;
}

.profiler-value {
    color: var(--snake-color);
    font-weight: bold;
}

.profiler-value.profiler-warning {
    color: #ffaa00;
}

.profiler-value.profiler-caution {
    color: #ff6b6b;
}

/* Gamepad Icon */
.gamepad-icon {
    position: fixed;
    top: 10px;
    right: 10px;
    font-size: 1.5em;
    z-index: 9998;
    display: none;
    animation: pulse 2s infinite;
}

.gamepad-icon.show {
    display: block;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Ghost Replay Toggle */
.setting-item {
    margin-bottom: 15px;
}

.setting-item label {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    cursor: pointer;
}

.setting-item select {
    padding: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1em;
    width: 100%;
    max-width: 300px;
}

.setting-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Theme-specific overrides */
[data-game-theme="neon"] {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a2e;
    --snake-color: #00ffff;
    --food-color: #ff00ff;
    --border-color: #00ffff;
}

[data-game-theme="vaporwave"] {
    --bg-primary: #ff006e;
    --bg-secondary: #8338ec;
    --snake-color: #3a86ff;
    --food-color: #ffbe0b;
    --border-color: #fb5607;
}

[data-game-theme="blueprint"] {
    --bg-primary: #001f3f;
    --bg-secondary: #003d7a;
    --snake-color: #00a8ff;
    --food-color: #ff6b6b;
    --border-color: #00a8ff;
}

[data-game-theme="matrix"] {
    --bg-primary: #000;
    --bg-secondary: #001100;
    --snake-color: #00ff00;
    --food-color: #ff0000;
    --border-color: #00ff00;
}

[data-game-theme="candy"] {
    --bg-primary: #ffeef7;
    --bg-secondary: #fff5f8;
    --snake-color: #ff6b9d;
    --food-color: #c44569;
    --border-color: #ff6b9d;
}

/* Seasonal Themes */
.season-winter {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
}

.season-winter .game-screen {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
}

.season-halloween {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d1b1b 100%);
}

.season-halloween .game-screen {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d1b1b 100%);
}

.season-spring {
    background: linear-gradient(135deg, #f3e5f5 0%, #e1bee7 100%);
}

.season-spring .game-screen {
    background: linear-gradient(135deg, #f3e5f5 0%, #e1bee7 100%);
}

.season-summer {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
}

.season-summer .game-screen {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(76, 175, 80, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 0, 0, 0.03) 0%, transparent 50%);
    color: var(--text-primary);
    /* Modern Typography Stack */
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    font-feature-settings: 'kern' 1, 'liga' 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    touch-action: none;
    transition: background-color var(--transition-base), color var(--transition-base);
    line-height: 1.6;
}

/* Header */
.header {
    width: 100%;
    max-width: 800px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    margin-bottom: 10px;
    flex-wrap: wrap;
    gap: 10px;
}

/* Modern Typography Hierarchy */
h1 {
    font-size: 2rem;
    color: var(--snake-color);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    transition: color var(--transition-base);
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.3;
    color: var(--text-primary);
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
}

p, body {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.caption {
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.header-controls {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.icon-btn {
    width: calc(40px * var(--ui-scale, 1.0));
    height: calc(40px * var(--ui-scale, 1.0));
    border-radius: var(--radius-full);
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: calc(1.2em * var(--ui-scale, 1.0));
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    position: relative;
    box-shadow: var(--shadow-elevation-1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.icon-btn:hover:not(:disabled) {
    background: var(--btn-bg);
    transform: translateY(-2px) scale(1.02);
    border-color: var(--btn-hover);
    box-shadow: var(--shadow-elevation-2);
}

.icon-btn:active:not(:disabled) {
    transform: translateY(0) scale(0.97);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.icon-btn:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring), var(--shadow-elevation-2);
}

.icon-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==================== UI POLISH: UNIFIED BUTTON STYLES ==================== */
/* ==================== ACCESSIBILITY: UI SCALING ==================== */
.btn,
.icon-btn,
.mode-btn,
.level-btn,
.shop-item,
.inventory-item,
.skill-node,
.level-item {
    transform: scale(var(--ui-scale, 1.0));
    transform-origin: center;
}

/* Apply UI scale to containers */
.modal-content,
.mode-select-content,
.hud-container {
    transform: scale(var(--ui-scale, 1.0));
    transform-origin: center;
}

/* Ensure spacing scales with UI */
[data-ui-scale="small"] .btn,
[data-ui-scale="small"] .icon-btn {
    padding: calc(8px * var(--ui-scale)) calc(16px * var(--ui-scale));
}

[data-ui-scale="large"] .btn,
[data-ui-scale="large"] .icon-btn {
    padding: calc(8px * var(--ui-scale)) calc(16px * var(--ui-scale));
}

.btn {
    padding: calc(10px * var(--ui-scale, 1.0)) calc(20px * var(--ui-scale, 1.0));
    font-size: calc(0.9375rem * var(--ui-scale, 1.0));
    background: var(--gradient-primary);
    color: var(--btn-text);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: all var(--transition-base);
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-elevation-2);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
    pointer-events: none;
    z-index: 1;
}

.btn:hover:not(:disabled)::before {
    left: 100%;
}

.btn:hover:not(:disabled) {
    background: var(--gradient-primary);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-colored-lg);
}


.btn:active:not(:disabled) {
    transform: translateY(0) scale(0.97);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.btn:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring), var(--shadow-elevation-2);
}

.btn:disabled,
.btn.disabled {
    background-color: var(--btn-disabled);
    color: var(--btn-disabled-text);
    cursor: not-allowed;
    opacity: 0.6;
    transform: none !important;
    box-shadow: none !important;
}

.btn:disabled:hover,
.btn.disabled:hover {
    background-color: var(--btn-disabled);
    transform: none;
    box-shadow: none;
}

.btn:disabled::before,
.btn.disabled::before {
    display: none;
}

/* Main Content */
.main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    flex: 1;
    justify-content: center;
    padding: 0 20px;
}

.game-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.score-container {
    font-size: 1.5em;
    font-weight: 600;
    color: var(--text-primary);
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.score-container #score {
    color: var(--snake-color);
    display: inline-block;
    transition: transform 0.2s ease, color 0.3s ease;
}

.score-container #score.score-pop {
    animation: scorePop 0.3s ease;
}

.combo-display {
    font-size: 0.8em;
    color: var(--food-color);
    font-weight: bold;
    opacity: 0;
    transition: opacity 0.3s;
}

.combo-display.active {
    opacity: 1;
}

@keyframes scorePop {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

.level-container {
    font-size: 1.1em;
    color: var(--text-primary);
}

.level-container #level {
    color: var(--snake-color);
    font-weight: 600;
}

.level-container .target {
    color: var(--text-secondary);
    font-size: 0.9em;
}

/* Power-up Indicator */
.power-up-indicator {
    display: none;
    align-items: center;
    gap: 10px;
    padding: 8px 15px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9em;
}

.power-up-indicator.active {
    display: flex;
}

.power-up-icon {
    font-size: 1.5em;
}

.power-up-timer {
    color: var(--text-secondary);
    font-size: 0.85em;
}

/* Portal Indicator */
.portal-indicator {
    display: none;
    padding: 6px 12px;
    background: rgba(138, 43, 226, 0.3);
    border: 2px solid #8a2be2;
    border-radius: 6px;
    font-size: 0.85em;
    color: #dda0dd;
}

.portal-indicator.active {
    display: block;
}

/* Combo Text */
.combo-text {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3em;
    font-weight: bold;
    color: var(--food-color);
    pointer-events: none;
    opacity: 0;
    z-index: 2000;
    text-shadow: 0 0 10px currentColor;
    transition: opacity 0.3s, transform 0.5s;
}

.combo-text.show {
    opacity: 1;
    animation: comboFloat 1s ease-out forwards;
}

@keyframes comboFloat {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -70%) scale(1.2);
        opacity: 0;
    }
}

/* Canvas Wrapper */
.canvas-wrapper {
    position: relative;
    display: inline-block;
}

#gameCanvas {
    border: 4px solid var(--border-color);
    background-color: var(--bg-secondary);
    display: block;
    touch-action: none;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 20px rgba(76, 175, 80, 0.3);
    transition: border-color 0.3s ease, background-color 0.3s ease, transform 0.1s ease, box-shadow 0.3s ease;
    /* Fixed size to prevent zooming */
    width: 400px !important;
    height: 400px !important;
    max-width: 400px !important;
    max-height: 400px !important;
    min-width: 400px !important;
    min-height: 400px !important;
    /* Responsive on small screens */
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-optimize-contrast; /* Edge support */
    image-rendering: crisp-edges;
    object-fit: contain;
    border-radius: var(--radius-lg);
    margin: 0 auto;
}

/* Game Over Overlay */
/* Game Over Overlay - Modern Redesign */
.game-over-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-bg);
    -webkit-backdrop-filter: var(--modal-backdrop-blur);    
    backdrop-filter: var(--modal-backdrop-blur);
    display: none;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-base);
    opacity: 0;
    z-index: var(--z-popup);
    padding: var(--spacing-md);
}

.game-over-overlay.show {
    display: flex;
    opacity: 1;
    animation: modalFadeIn var(--transition-base);
}

.game-over-content {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--modal-content-bg);
    border-radius: var(--radius-xl);
    border: 2px solid var(--food-color);
    box-shadow: var(--shadow-elevation-4);
    -webkit-backdrop-filter: blur(20px);    
    backdrop-filter: blur(20px);
    max-width: 600px;
    width: 100%;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.game-over-overlay.show .game-over-content {
    transform: scale(1);
    animation: modalSlideIn var(--transition-base);
}

.game-over-content h2 {
    font-size: var(--font-4xl);
    color: var(--food-color);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.game-over-content p {
    font-size: var(--font-lg);
    color: var(--text-primary);
    margin: var(--spacing-sm) 0;
    line-height: var(--line-height-relaxed);
}

.game-over-content .hint {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-lg);
    line-height: var(--line-height-normal);
}

.game-over-content .btn {
    margin: var(--spacing-xs);
}

/* Level Complete Overlay - Modern Redesign */
.level-complete-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-bg);
    -webkit-backdrop-filter: var(--modal-backdrop-blur);    
    backdrop-filter: var(--modal-backdrop-blur);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-popup);
    padding: var(--spacing-md);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.level-complete-overlay.show {
    display: flex;
    opacity: 1;
    animation: modalFadeIn var(--transition-base);
}

.level-complete-content {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--modal-content-bg);
    border-radius: var(--radius-xl);
    border: 2px solid var(--snake-color);
    box-shadow: var(--shadow-elevation-4);
    -webkit-backdrop-filter: blur(20px);    
    backdrop-filter: blur(20px);
    max-width: 600px;
    width: 100%;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.level-complete-overlay.show .level-complete-content {
    transform: scale(1);
    animation: modalSlideIn var(--transition-base);
}

.level-complete-content h2 {
    font-size: var(--font-4xl);
    color: var(--snake-color);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    letter-spacing: -0.02em;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* Pause Overlay - Modern Redesign */
.pause-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-bg);
    -webkit-backdrop-filter: var(--modal-backdrop-blur);    
    backdrop-filter: var(--modal-backdrop-blur);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--spacing-md);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.pause-overlay.show {
    display: flex;
    opacity: 1;
    animation: modalFadeIn var(--transition-base);
}

.pause-content {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--modal-content-bg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-elevation-3);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    max-width: 500px;
    width: 100%;
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

.pause-overlay.show .pause-content {
    transform: scale(1);
    animation: modalSlideIn var(--transition-base);
}

.pause-content h2 {
    font-size: var(--font-3xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.pause-content p {
    color: var(--text-secondary);
    font-size: var(--font-base);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-relaxed);
}

.pause-content .btn {
    margin: var(--spacing-xs);
}

/* Control Pad (Mobile) */
.control-pad {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    margin-top: 20px;
}

.control-row {
    display: flex;
    gap: 5px;
}

.control-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: var(--control-bg);
    color: var(--text-primary);
    font-size: 1.5em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}

.control-btn:active {
    background: var(--control-active);
    transform: scale(0.9);
}

.control-btn:focus {
    outline: none;
}

/* Footer */
.footer {
    width: 100%;
    text-align: center;
    padding: 15px;
    font-size: 0.85em;
    color: var(--text-secondary);
    margin-top: auto;
}

/* Modal Styles */
/* ==================== UI POLISH: Z-INDEX LAYERING ==================== */
/* Standardized z-index values for consistent layering */
:root {
    --z-base: 1;
    --z-overlay: 10;
    --z-modal: 1000;
    --z-modal-content: 1001;
    --z-popup: 2000;
    --z-tooltip: 3000;
    --z-debug: 9999;
    --z-max: 10000;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-bg);
    -webkit-backdrop-filter: var(--modal-backdrop-blur);
    backdrop-filter: var(--modal-backdrop-blur);
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal.show {
    display: flex;
    opacity: 1;
    animation: modalFadeIn var(--transition-base);
}

.modal-content {
    background: rgba(31, 31, 31, 0.95);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-elevation-3);
    z-index: var(--z-modal-content);
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    transform: scale(0.95);
    transition: transform var(--transition-base);
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.modal.show .modal-content {
    transform: scale(1);
    animation: modalSlideIn var(--transition-base);
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-30px) scale(0.95);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

@keyframes modalSlideOut {
    from {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    to {
        transform: translateY(-30px) scale(0.95);
        opacity: 0;
    }
}

/* ==================== ACCESSIBILITY: REDUCED MOTION ==================== */
[data-low-motion="true"] *,
[data-low-motion="true"] *::before,
[data-low-motion="true"] *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
}

/* Keep essential transitions for gameplay clarity */
[data-low-motion="true"] .combo-text,
[data-low-motion="true"] .score-pop,
[data-low-motion="true"] .power-up-indicator,
[data-low-motion="true"] .portal-indicator {
    transition-duration: 0.15s !important;
}

/* Disable heavy animations */
[data-low-motion="true"] .modal-content {
    animation: none !important;
}

[data-low-motion="true"] .level-item.newly-unlocked {
    animation: none !important;
}

[data-low-motion="true"] .new-badge-pulse {
    animation: none !important;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-header h2 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5em;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-full);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    line-height: 1;
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transform: rotate(90deg) scale(1.1);
    box-shadow: var(--shadow-elevation-1);
}

.modal-close:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring);
}

.modal-body {
    color: var(--text-primary);
    line-height: 1.6;
    padding-top: var(--spacing-md);
}

/* Modern Section Dividers */
.modal-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.modal-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.modal-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

/* Level Grid */
.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 10px;
}

.level-btn {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    text-align: center;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-elevation-1);
    -webkit-backdrop-filter: blur(10px);    
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.level-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.level-btn:hover:not(:disabled) {
    background: var(--btn-bg);
    transform: translateY(-2px) scale(1.02);
    border-color: var(--btn-hover);
    box-shadow: var(--shadow-elevation-2);
}

.level-btn:hover:not(:disabled)::before {
    opacity: 1;
}

.level-btn:active:not(:disabled) {
    transform: translateY(0) scale(0.98);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.level-btn:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring), var(--shadow-elevation-2);
}

.level-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-tertiary);
}

.level-btn.current {
    background: linear-gradient(135deg, var(--snake-color) 0%, var(--btn-hover-bg) 100%);
    color: var(--btn-text);
    border-color: var(--snake-color);
    box-shadow: var(--shadow-elevation-2);
}

/* Skin Grid */
.skin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.skin-item {
    padding: 15px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
    position: relative;
}

.skin-item:hover:not(:disabled) {
    border-color: var(--btn-bg);
    transform: scale(1.05);
}

.skin-item.selected {
    border-color: var(--snake-color);
    background: var(--btn-bg);
}

.skin-item:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.skin-preview {
    width: 40px;
    height: 40px;
    margin: 0 auto 10px;
    border-radius: 4px;
}

.skin-name {
    font-size: 0.9em;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.skin-lock {
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 1.2em;
}

/* Theme Grid */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
}

.theme-item {
    padding: 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
    position: relative;
}

.theme-item:hover:not(:disabled) {
    border-color: var(--btn-bg);
    transform: scale(1.05);
}

.theme-item.selected {
    border-color: var(--snake-color);
    background: var(--btn-bg);
}

.theme-item:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.theme-preview {
    width: 100%;
    height: 60px;
    margin-bottom: 10px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.theme-name {
    font-size: 1em;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 5px;
}

.theme-desc {
    font-size: 0.85em;
    color: var(--text-secondary);
}

.theme-lock {
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 1.2em;
}

/* Settings */
.setting-item {
    padding: 15px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
}

.setting-item label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1em;
}

.setting-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Achievements List */
.achievements-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.achievement-item {
    padding: 15px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.achievement-item.unlocked {
    border-color: var(--snake-color);
    background: rgba(76, 175, 80, 0.1);
}

.achievement-icon-large {
    font-size: 2em;
}

.achievement-info {
    flex: 1;
}

.achievement-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.achievement-desc {
    font-size: 0.9em;
    color: var(--text-secondary);
}

.achievement-lock {
    font-size: 1.5em;
    opacity: 0.3;
}

/* Leaderboard List */
.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.leaderboard-item {
    padding: 15px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.leaderboard-rank {
    font-size: 1.5em;
    font-weight: 600;
    color: var(--snake-color);
    min-width: 40px;
}

.leaderboard-info {
    flex: 1;
    margin-left: 15px;
}

.leaderboard-name {
    font-weight: 600;
    color: var(--text-primary);
}

.leaderboard-score {
    font-size: 1.2em;
    font-weight: 600;
    color: var(--snake-color);
}

/* Achievement Popup */
.achievement-popup {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-tertiary);
    border: 2px solid var(--snake-color);
    border-radius: 10px;
    padding: 15px 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    z-index: 2000;
    display: none;
    animation: slideInRight 0.3s ease;
    max-width: 300px;
}

.achievement-popup.show {
    display: block;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.achievement-popup-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.achievement-popup-content .achievement-icon {
    font-size: 2em;
}

.achievement-popup-content h3 {
    font-size: 1em;
    color: var(--snake-color);
    margin-bottom: 5px;
}

.achievement-popup-content p {
    font-size: 0.85em;
    color: var(--text-secondary);
}

/* ==================== APP LOGO (UNIFIED BRANDING) ==================== */
.app-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-3xl);
    font-weight: 800;
    letter-spacing: var(--letter-spacing-tight);
    color: var(--snake-color);
    margin: 0;
}

.app-logo-icon {
    font-size: 1.5em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 2em;
    width: 2em;
    min-height: 2em;
    min-width: 2em;
    line-height: 1;
    vertical-align: middle;
    padding: 0;
    background: transparent;
    box-sizing: border-box;
    flex-shrink: 0;
    position: relative;
    border: none;
}

.app-logo-icon img {
    height: 100%;
    width: 100%;
    display: block;
    object-fit: contain;
    margin: 0;
    border: none;
}

/* If logo-icon is directly an img - clean logo without borders */
img.app-logo-icon {
    height: 2em;
    width: 2em;
    min-height: 2em;
    min-width: 2em;
    padding: 0;
    background: transparent;
    box-sizing: border-box;
    display: inline-block;
    vertical-align: middle;
    object-fit: contain;
    flex-shrink: 0;
    border: none;
}

.app-logo-text {
    display: inline-block;
}

/* Mode Select Screen */
.mode-select-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    transition: opacity var(--transition-slow);
    overflow-y: auto;
}

/* Prevent mode select from being hidden on initial load */
/* Only apply when data-game-active is not set, allowing JavaScript to override */
.mode-select-screen:not([data-game-active]) {
    display: flex;
}

.mode-select-content {
    text-align: center;
    padding: var(--spacing-xl);
    max-width: 900px;
    width: 90%;
    margin: auto;
}

.main-menu-header {
    margin-bottom: var(--spacing-2xl);
}

.mode-select-content h1,
.main-menu-header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 0;
    color: var(--snake-color);
}

.mode-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    visibility: visible;
    opacity: 1;
    height: auto;
    min-height: 0;
}

/* Main Menu Button Styles */
.main-menu-btn {
    position: relative;
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-lg);
    min-height: 60px;
    display: flex;
    /* Ensure buttons remain clickable even when opacity is 0 during animation */
    pointer-events: auto !important;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    background: var(--gradient-primary);
    color: var(--btn-text);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-elevation-2);
    overflow: hidden;
    text-align: center;
}

.main-menu-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    transform: translate(-50%, -50%);
    transition: width var(--transition-base), height var(--transition-base);
    pointer-events: none;
    z-index: 1;
}

.main-menu-btn:hover:not(:disabled)::before {
    width: 300px;
    height: 300px;
}

.main-menu-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--btn-hover) 0%, var(--btn-hover-bg) 100%);
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-colored-lg);
    border-color: var(--color-primary-light);
}

.main-menu-btn:active:not(:disabled) {
    transform: translateY(-1px) scale(0.98);
    box-shadow: var(--shadow-elevation-1);
    transition: all var(--transition-fast);
}

.main-menu-btn:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring), var(--shadow-elevation-2);
}

.main-menu-btn:disabled,
.main-menu-btn.disabled {
    background: var(--btn-disabled-bg);
    color: var(--btn-disabled-text);
    cursor: not-allowed;
    opacity: 0.6;
    transform: none !important;
    box-shadow: none !important;
    border-color: var(--gray-600);
}

.main-menu-btn:disabled:hover,
.main-menu-btn.disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Minigame buttons - slightly different styling */
.main-menu-btn-minigame {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 100%);
    border-color: var(--color-secondary);
}

.main-menu-btn-minigame:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-secondary-dark) 0%, var(--color-secondary) 100%);
    border-color: var(--color-secondary-light);
}

/* Ensure buttons with opacity:0 are still clickable (for animation purposes) */
.btn[style*="opacity: 0"],
.btn[style*="opacity:0"],
.main-menu-btn[style*="opacity: 0"],
.main-menu-btn[style*="opacity:0"],
.mode-card-play-btn[style*="opacity: 0"],
.mode-card-play-btn[style*="opacity:0"] {
    pointer-events: auto !important;
}

/* Button content */
.main-menu-btn .btn-icon {
    font-size: 1.8em;
    line-height: 1;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.main-menu-btn .btn-text {
    font-size: 0.95em;
    line-height: 1.2;
    display: block;
}

/* Responsive adjustments for main menu */
@media (max-width: 768px) {
    .mode-select-content {
        padding: var(--spacing-lg);
        max-width: 100%;
    }
    
    .main-menu-header {
        margin-bottom: var(--spacing-lg);
    }
    
    .mode-select-content h1,
    .main-menu-header h1 {
        font-size: clamp(1.5rem, 6vw, 2.5rem);
    }
    
    .mode-buttons {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .main-menu-btn {
        padding: var(--spacing-md) var(--spacing-sm);
        min-height: 50px;
        font-size: var(--font-base);
    }
    
    .main-menu-btn .btn-icon {
        font-size: 1.5em;
        margin-bottom: 2px;
    }
    
    .main-menu-btn .btn-text {
        font-size: 0.85em;
    }
}

@media (max-width: 480px) {
    .mode-select-content {
        padding: var(--spacing-md);
    }
    
    .mode-buttons {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .main-menu-btn {
        padding: var(--spacing-md);
        min-height: 55px;
    }
}

.icon-btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--btn-bg) 0%, var(--btn-hover-bg) 100%);
    color: var(--btn-text);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-elevation-1);
    -webkit-backdrop-filter: blur(10px);    
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.icon-btn-large::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    transform: translate(-50%, -50%);
    transition: width var(--transition-base), height var(--transition-base);
    pointer-events: none;
}

.icon-btn-large:hover {
    background: linear-gradient(135deg, var(--btn-hover) 0%, var(--btn-hover-bg) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevation-2);
}

.icon-btn-large:hover::before {
    width: 200px;
    height: 200px;
}

.icon-btn-large:active {
    transform: translateY(0) scale(0.97);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.icon-btn-large:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring), var(--shadow-elevation-2);
}

.game-screen {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 30px;
    padding: 20px;
    box-sizing: border-box;
    background: var(--bg-primary);
    position: relative;
}

/* Floating HUD */
.hud-container {
    position: absolute;
    top: 80px;
    left: 20px;
    right: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    z-index: 100;
    pointer-events: none;
    justify-content: flex-start;
}

.hud-item {
    background: rgba(26, 26, 26, 0.85);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    pointer-events: auto;
    transition: all var(--transition-base);
    min-width: 100px;
    box-shadow: var(--shadow-elevation-1);
}

.hud-item:hover {
    background: rgba(26, 26, 26, 0.95);
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevation-2);
    border-color: rgba(76, 175, 80, 0.3);
}

.hud-label {
    font-size: 0.85em;
    color: var(--text-secondary);
    font-weight: 500;
}

.hud-value {
    font-size: 1.2em;
    font-weight: 700;
    color: var(--snake-color);
    margin-left: auto;
}

.hud-subtext {
    font-size: 0.9em;
    color: var(--text-secondary);
}

.hud-icon {
    font-size: 1.3em;
}

.hud-timer {
    font-size: 0.9em;
    color: var(--food-color);
    font-weight: 600;
    margin-left: auto;
}

.zoom-hazard-hud {
    border-color: #ff6b35;
    background: rgba(255, 107, 53, 0.2);
}

.combo-hud {
    border-color: #ffd700;
    background: rgba(255, 215, 0, 0.2);
}

.combo-hud .hud-value {
    color: #ffd700;
}

.power-up-hud {
    border-color: var(--btn-bg);
    background: rgba(76, 175, 80, 0.2);
}

.coins-hud {
    border-color: #ffd700;
    background: rgba(255, 215, 0, 0.2);
}

.coins-hud .hud-value {
    color: #ffd700;
}

.player-level-hud {
    border-color: #9c27b0;
    background: rgba(156, 39, 176, 0.2);
}

.player-level-hud .hud-value {
    color: #9c27b0;
}

.boss-hud {
    border-color: #f44336;
    background: rgba(244, 67, 54, 0.3);
    min-width: 200px;
}

.boss-health-bar {
    width: 100%;
    height: 8px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 4px;
    margin-top: 5px;
    overflow: hidden;
}

.boss-health-fill {
    height: 100%;
    background: linear-gradient(90deg, #f44336, #ff9800);
    transition: width 0.3s ease;
    width: 100%;
}

.level-hud {
    display: flex;
    align-items: center;
    gap: 5px;
}

.new-record {
    color: #ffd700;
    font-weight: 700;
    font-size: 1.2em;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ==================== ACCESSIBILITY: FOCUS INDICATORS ==================== */
/* Show focus indicators when using keyboard navigation */
[data-keyboard-nav="true"] *:focus,
[data-show-focus="true"] *:focus {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    border-radius: var(--focus-outline-radius);
    box-shadow: 0 0 0 var(--focus-outline-offset) var(--snake-color);
}

/* Enhanced focus for buttons */
[data-keyboard-nav="true"] button:focus,
[data-show-focus="true"] button:focus {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    border-radius: var(--focus-outline-radius);
    box-shadow: 0 0 0 var(--focus-outline-offset) var(--snake-color), 0 0 8px rgba(76, 175, 80, 0.5);
}

/* Focus for tabs */
[data-keyboard-nav="true"] .shop-tab:focus,
[data-keyboard-nav="true"] .inventory-tab:focus,
[data-show-focus="true"] .shop-tab:focus,
[data-show-focus="true"] .inventory-tab:focus {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
}

/* Focus for level items */
[data-keyboard-nav="true"] .level-item:focus,
[data-show-focus="true"] .level-item:focus {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: 0 0 0 var(--focus-outline-offset) var(--snake-color), 0 5px 15px rgba(76, 175, 80, 0.5);
}

/* Focus for skill nodes */
[data-keyboard-nav="true"] .skill-node:focus,
[data-show-focus="true"] .skill-node:focus {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: 0 0 0 var(--focus-outline-offset) var(--snake-color), 0 4px 12px rgba(76, 175, 80, 0.5);
}

/* High Contrast Mode */
[data-high-contrast="true"] {
    --text-primary: #fff;
    --text-secondary: #fff;
    --bg-primary: #000;
    --bg-secondary: #000;
    --bg-tertiary: #1a1a1a;
    --border-color: #fff;
    --btn-bg: #fff;
    --btn-text: #000;
    --btn-hover: #ccc;
    --snake-color: #00ff00;
    --food-color: #ff0000;
    --focus-outline: 4px solid #fff;
    --focus-outline-offset: 4px;
}

[data-high-contrast="true"][data-theme="light"] {
    --text-primary: #000;
    --text-secondary: #000;
    --bg-primary: #fff;
    --bg-secondary: #fff;
    --bg-tertiary: #f5f5f5;
    --border-color: #000;
    --btn-bg: #000;
    --btn-text: #fff;
    --btn-hover: #333;
    --snake-color: #008000;
    --food-color: #cc0000;
    --focus-outline: 4px solid #000;
    --focus-outline-offset: 4px;
}

/* Canvas Zoom Transform */
.canvas-wrapper {
    transition: transform 0.5s ease;
    transform-origin: center center;
}

/* Boss Warning Overlay */
.boss-warning-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(244, 67, 54, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    animation: bossWarningFlash 0.5s ease;
}

@keyframes bossWarningFlash {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

.boss-warning-content {
    text-align: center;
    padding: 30px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    border: 3px solid #f44336;
    box-shadow: 0 4px 20px rgba(244, 67, 54, 0.5);
}

.boss-warning-content h2 {
    font-size: 2em;
    color: #f44336;
    animation: pulse 0.5s infinite;
}

/* Shop Styles */
.shop-coins {
    font-size: 1.2em;
    font-weight: 600;
    color: #ffd700;
}

.shop-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.shop-tab {
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: all var(--transition-base);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    position: relative;
}

.shop-tab::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--snake-color);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.shop-tab:hover:not(.active) {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

.shop-tab.active {
    color: var(--snake-color);
    background: var(--bg-tertiary);
}

.shop-tab.active::after {
    transform: scaleX(1);
}

.shop-tab:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring);
}

.shop-content {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
}

.shop-item {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-elevation-1);
    -webkit-backdrop-filter: blur(10px);    
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.shop-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.shop-item:hover:not(.locked):not(.owned) {
    border-color: var(--btn-bg);
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-elevation-2);
    background: var(--bg-tertiary);
}

.shop-item:hover:not(.locked):not(.owned)::before {
    opacity: 1;
}

.shop-item:active:not(.locked):not(.owned) {
    transform: translateY(-1px) scale(0.98);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.shop-item:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring), var(--shadow-elevation-2);
}

.shop-item.owned {
    opacity: 0.6;
}

.shop-item-price {
    color: #ffd700;
    font-weight: 600;
    margin-top: 10px;
}

.shop-item-name {
    color: var(--text-primary);
    font-weight: 600;
    margin: 10px 0;
}

/* Inventory Styles */
.inventory-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.inventory-tab {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.2s ease;
}

.inventory-tab:hover:not(.active) {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

.inventory-tab.active {
    color: var(--snake-color);
    border-bottom-color: var(--snake-color);
}

.inventory-content {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 15px;
}

.inventory-item {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
    box-shadow: var(--shadow-elevation-1);
    -webkit-backdrop-filter: blur(10px);    
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.inventory-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.inventory-item:hover:not(.disabled) {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-elevation-2);
    border-color: var(--btn-bg);
}

.inventory-item:hover:not(.disabled)::before {
    opacity: 1;
}

.inventory-item:active:not(.disabled) {
    transform: translateY(-1px) scale(0.98);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.inventory-item.equipped {
    border-color: var(--snake-color);
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.15) 0%, var(--bg-tertiary) 100%);
    box-shadow: var(--shadow-elevation-2);
}

.inventory-item:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring), var(--shadow-elevation-2);
}

/* Missions Styles */
.player-progress {
    padding: 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
}

.progress-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.level-progress-bar {
    width: 100%;
    height: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    overflow: hidden;
}

.level-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--snake-color), var(--btn-bg));
    transition: width 0.3s ease;
    width: 0%;
}

.missions-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mission-item {
    padding: 15px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
}

.mission-item.completed {
    border-color: var(--snake-color);
    background: rgba(76, 175, 80, 0.1);
}

.mission-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.mission-name {
    font-weight: 600;
    color: var(--text-primary);
}

.mission-reward {
    color: #ffd700;
    font-weight: 600;
}

.mission-progress {
    margin-top: 10px;
}

.mission-progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 5px;
}

.mission-progress-fill {
    height: 100%;
    background: var(--snake-color);
    transition: width 0.3s ease;
}

/* Level Editor Styles */
.level-editor-content {
    max-width: 900px;
}

.editor-toolbar {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.tile-palette {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    padding: 15px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
}

.tile-palette-item {
    width: 50px;
    height: 50px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    transition: all 0.2s ease;
}

.tile-palette-item:hover {
    transform: scale(1.1);
    border-color: var(--btn-bg);
}

.tile-palette-item.selected {
    border-color: var(--snake-color);
    background: rgba(76, 175, 80, 0.2);
}

.editor-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.level-select {
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-size: 0.9em;
}

.editor-canvas-wrapper {
    position: relative;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    overflow: auto;
    max-height: 60vh;
}

#editorCanvas {
    display: block;
    background: var(--bg-secondary);
    cursor: crosshair;
}

.editor-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
}

/* Procedural Settings */
.setting-item input[type="range"] {
    width: 100%;
    margin-top: 5px;
}

.setting-item input[type="text"] {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    padding: 8px;
}

.setting-item select {
    width: 100%;
    padding: 8px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-size: 1em;
}

/* Responsive Design */
@media (max-width: 600px) {
    .header {
        padding: 10px 15px;
    }
    
    h1 {
        font-size: 1.4em;
    }
    
    .icon-btn {
        width: 40px;
        height: 40px;
        font-size: 1em;
    }
    
    .btn {
        padding: 8px 14px;
        font-size: 0.9em;
    }
    
    .score-container {
        font-size: 1.2em;
    }
    
    #gameCanvas {
        width: min(90vw, 400px) !important;
        height: min(90vw, 400px) !important;
        max-width: 400px !important;
        max-height: 400px !important;
        min-width: auto !important;
        min-height: 0 !important;
    }
    
    .control-pad {
        display: flex;
    }
    
    .control-btn {
        width: 70px;
        height: 70px;
    }
    
    .footer {
        font-size: 0.75em;
        padding: 10px;
    }
    
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
/* Performance Settings Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--btn-bg);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.setting-item {
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-bottom: 10px;
}

/* Level Select Styles */
.level-select-info {
    text-align: center;
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 15px;
    padding: 20px 0;
}

.level-item {
    position: relative;
    aspect-ratio: 1;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    overflow: hidden;
    box-shadow: var(--shadow-elevation-1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.level-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.level-item:hover:not(.locked) {
    transform: translateY(-4px);
    box-shadow: var(--shadow-elevation-2);
    border-color: var(--snake-color);
}

.level-item:hover:not(.locked)::before {
    opacity: 1;
}

.level-item:active:not(.locked) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevation-1);
    transition: all var(--transition-fast);
}

.level-item:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring), var(--shadow-elevation-2);
}

.level-item.locked {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-tertiary);
    border-color: #666;
}

.level-item.locked:hover {
    transform: none;
    box-shadow: none;
}

.level-item.newly-unlocked {
    animation: levelUnlockAnimation 0.6s ease-out;
    border-color: #ffd700;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

@keyframes levelUnlockAnimation {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.level-item-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px;
}

.level-lock-icon {
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 1.2em;
    opacity: 0.7;
}

.level-new-badge {
    position: absolute;
    top: 5px;
    left: 5px;
    background: linear-gradient(135deg, #ff6b6b, #ee5a6f);
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.7em;
    font-weight: bold;
    animation: newBadgePulse 2s infinite;
    z-index: 10;
}

@keyframes newBadgePulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.9;
    }
}

.level-number {
    font-size: 2em;
    font-weight: bold;
    color: var(--snake-color);
    margin-bottom: 5px;
}

.level-item.locked .level-number {
    color: #666;
}

.level-info {
    font-size: 0.85em;
    color: var(--text-secondary);
    text-align: center;
}

.level-target {
    margin-top: 5px;
}

/* Level Select Modal Specific */
#levelSelectModal .level-grid {
    max-height: 60vh;
    overflow-y: auto;
    padding: 20px;
}

#levelSelectModal .level-grid::-webkit-scrollbar {
    width: 8px;
}

#levelSelectModal .level-grid::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

#levelSelectModal .level-grid::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

#levelSelectModal .level-grid::-webkit-scrollbar-thumb:hover {
    background: var(--snake-color);
}

/* Level Rank Badge */
.level-rank-badge {
    position: absolute;
    top: 5px;
    left: 5px;
    padding: 2px 6px;
    border-radius: 10px;
    font-size: 0.7em;
    font-weight: bold;
    color: white;
    z-index: 10;
}

.level-rank {
    margin-top: 5px;
    font-size: 0.8em;
    font-weight: bold;
}

/* World Select Styles */
.world-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.world-card {
    position: relative;
    aspect-ratio: 4/3;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    overflow: hidden;
}

.world-card:hover:not(.locked) {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.3);
    border-color: var(--snake-color);
}

.world-card.locked {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-tertiary);
    border-color: #666;
    filter: grayscale(100%);
}

.world-card.locked:hover {
    transform: none;
    box-shadow: none;
}

.world-card.completed {
    border-color: #ffd700;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

.world-card-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.world-lock-icon {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 2em;
    opacity: 0.7;
}

.world-complete-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 40px;
    height: 40px;
    background: #ffd700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    color: #000;
    font-weight: bold;
}

.world-number {
    font-size: 2em;
    font-weight: bold;
    color: var(--snake-color);
    margin-bottom: 10px;
}

.world-card.locked .world-number {
    color: #666;
}

.world-info {
    font-size: 1em;
    color: var(--text-primary);
    text-align: center;
}

/* Skill Tree Styles */
.skill-tree-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.skill-node {
    position: relative;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-elevation-1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.skill-node::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.skill-node:hover:not(.locked):not(.purchased) {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-elevation-2);
    border-color: var(--snake-color);
}

.skill-node:hover:not(.locked):not(.purchased)::before {
    opacity: 1;
}

.skill-node:active:not(.locked):not(.purchased) {
    transform: translateY(-1px) scale(0.98);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.skill-node:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring), var(--shadow-elevation-2);
}

.skill-node.locked {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-tertiary);
    border-color: #666;
}

.skill-node.purchased {
    background: rgba(76, 175, 80, 0.1);
    border-color: var(--snake-color);
}

.skill-node.affordable {
    border-color: #ffd700;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.skill-icon {
    font-size: 3em;
    margin-bottom: 10px;
}

.skill-name {
    font-size: 1.2em;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.skill-description {
    font-size: 0.9em;
    color: var(--text-secondary);
    margin-bottom: 10px;
    min-height: 40px;
}

.skill-requirement {
    font-size: 0.85em;
    color: #666;
    margin-top: 10px;
}

.skill-cost {
    font-size: 1em;
    color: var(--snake-color);
    font-weight: bold;
    margin-top: 10px;
}

/* S-Rank Results Modal */
#sRankResultsModal .modal-content {
    max-width: 500px;
}

/* Timer HUD */
.timer-hud {
    background: rgba(0, 0, 0, 0.7);
    padding: 8px 12px;
    border-radius: 8px;
}

#levelTimerDisplay {
    font-family: 'Courier New', monospace;
    font-size: 1.2em;
}

    .level-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
    
    .achievement-popup {
        right: 10px;
        top: 10px;
        max-width: calc(100vw - 20px);
    }
    
    .theme-grid {
        grid-template-columns: 1fr;
    }
    
    .hud-container {
        top: 60px;
        left: 10px;
        right: 10px;
        gap: 8px;
    }
    
    .hud-item {
        padding: 8px 12px;
        min-width: 80px;
        font-size: 0.9em;
    }
    
    .mode-select-content h1 {
        font-size: 2em;
    }
    
    .mode-buttons {
        grid-template-columns: 1fr;
    }
    
    .mode-btn {
        padding: 20px;
    }
}

@media (min-width: 601px) {
    .control-pad {
        display: none !important;
    }
}

/* Particle Canvas */
#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 8;
}

/* Weather Canvas */
#weatherCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

/* Heatmap Canvas */
#heatmapCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 4;
    opacity: 0.6;
}

/* Difficulty Selector */
.difficulty-selector {
    margin: 20px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.difficulty-selector label {
    color: var(--text-primary);
    font-weight: 600;
}

.difficulty-selector select {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1em;
    cursor: pointer;
}

.difficulty-selector select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Boss Fruit HUD */
.boss-fruit-hud {
    border-color: #ff6b35;
    background: rgba(255, 107, 53, 0.3);
}

.boss-fruit-hud .hud-value {
    color: #ff6b35;
}

/* Weather HUD */
.weather-hud {
    border-color: #87ceeb;
    background: rgba(135, 206, 235, 0.2);
}

/* Daily Challenge Modal */
#dailyChallengeContent {
    text-align: center;
}

#dailyChallengeTitle {
    font-size: 1.5em;
    color: var(--snake-color);
    margin-bottom: 10px;
}

#dailyChallengeDesc {
    font-size: 1em;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    margin: 10px 0;
}

.progress-fill {
    height: 100%;
    background: var(--snake-color);
    transition: width 0.3s ease;
    width: 0%;
}

#dailyChallengeProgressText {
    display: block;
    margin-top: 5px;
    color: var(--text-secondary);
    font-size: 0.9em;
}

/* Lightning Flash Effect */
.lightning-flash {
    animation: lightningFlash 0.12s ease;
}

@keyframes lightningFlash {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(2.5); }
}

/* Ghost Snake */
.ghost-snake {
    opacity: 0.3;
    pointer-events: none;
}

/* Evolution Glow */
.evolution-glow {
    filter: drop-shadow(0 0 5px currentColor);
}

/* Achievement Unlock Animation */
.achievement-item.unlocking {
    animation: achievementUnlock 0.5s ease;
}

@keyframes achievementUnlock {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); background: var(--snake-color); }
    100% { transform: scale(1); }
}

/* ==================== PHASE 8: MOBILE & TOUCH SUPPORT ==================== */

/* Safe Area Support */
:root {
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-right: env(safe-area-inset-right, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-left: env(safe-area-inset-left, 0px);
    --base-font-size: 16px;
    --font-scale: 1.0;
    --min-tap-size: 44px;
}

/* Mobile Device Styles */
.mobile-device {
    --base-font-size: 14px;
}

.tablet-device {
    --base-font-size: 18px;
}

/* Virtual D-Pad */
.virtual-dpad {
    position: fixed;
    bottom: calc(var(--safe-area-bottom) + 20px);
    left: calc(var(--safe-area-left) + 20px);
    width: 120px;
    height: 120px;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    pointer-events: none;
}

.virtual-dpad.show {
    display: flex;
}

.dpad-btn {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(76, 175, 80, 0.3);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.5em;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
    transition: all 0.1s ease;
}

.dpad-btn:active,
.dpad-btn.active {
    background: rgba(76, 175, 80, 0.6);
    transform: scale(0.9);
}

.dpad-up {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

.dpad-down {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.dpad-left {
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

.dpad-right {
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}

/* Gamepad Notification */
.gamepad-notification {
    position: fixed;
    top: calc(var(--safe-area-top) + 20px);
    right: calc(var(--safe-area-right) + 20px);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 20px;
    z-index: 9999;
    display: none;
    align-items: center;
    gap: 10px;
    animation: slideInRight 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.gamepad-notification.show {
    display: flex;
}

/* Mobile Layout Adjustments */
.mobile-layout .header {
    padding: 10px var(--safe-area-left) 10px var(--safe-area-right);
}

.mobile-layout .hud-container {
    top: calc(var(--safe-area-top) + 60px);
    left: var(--safe-area-left);
    right: var(--safe-area-right);
}

.mobile-layout .mobile-pause-btn {
    min-width: var(--min-tap-size);
    min-height: var(--min-tap-size);
}

/* Low Power Mode */
.low-power-mode {
    filter: brightness(0.9);
}

.low-power-mode * {
    animation-duration: 0.5s !important;
}

.low-power-notification {
    position: fixed;
    top: calc(var(--safe-area-top) + 20px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 193, 7, 0.9);
    border: 2px solid #ffc107;
    border-radius: 8px;
    padding: 12px 20px;
    z-index: 9999;
    display: none;
    align-items: center;
    gap: 10px;
    color: #000;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.low-power-notification.show {
    display: flex;
    animation: slideInDown 0.3s ease;
}

.low-power-notification button {
    background: transparent;
    border: none;
    color: #000;
    font-size: 1.5em;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Reduced Refresh Mode */
.reduced-refresh-mode {
    animation-duration: 0.1s !important;
}

/* Save Export/Import Modals */
.save-export-modal .modal-content,
.save-import-modal .modal-content {
    max-width: 500px;
}

.export-options,
.import-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.export-options button,
.import-options button {
    width: 100%;
    padding: 12px;
    font-size: 1em;
}

#qrCodeContainer {
    margin-top: 20px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 2px solid var(--border-color);
}

#qrCodeCanvas {
    max-width: 100%;
    height: auto;
}

.file-input-label {
    display: inline-block;
    cursor: pointer;
}

.warning {
    color: #ff6b6b;
    font-size: 0.9em;
    margin-top: 10px;
}

/* Mobile Responsive Enhancements */
@media (max-width: 600px) {
    .virtual-dpad {
        width: 100px;
        height: 100px;
    }
    
    .dpad-btn {
        width: 35px;
        height: 35px;
        font-size: 1.2em;
    }
    
    .gamepad-notification {
        right: 10px;
        top: 10px;
        font-size: 0.9em;
        padding: 10px 15px;
    }
    
    .low-power-notification {
        left: 10px;
        right: 10px;
        transform: none;
        font-size: 0.9em;
    }
}

/* Touch Action Optimization */
* {
    touch-action: manipulation;
}

button, .btn, .icon-btn, .control-btn {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

/* Font Scaling */
body {
    font-size: calc(var(--base-font-size) * var(--font-scale));
}

h1 {
    font-size: calc(1.8em * var(--font-scale));
}

h2 {
    font-size: calc(1.5em * var(--font-scale));
}

.btn {
    min-height: var(--min-tap-size);
    padding: calc(8px * var(--font-scale)) calc(16px * var(--font-scale));
}

.icon-btn {
    min-width: var(--min-tap-size);
    min-height: var(--min-tap-size);
}

/* Safe Area Padding */
.header {
    padding-top: calc(15px + var(--safe-area-top));
    padding-left: calc(20px + var(--safe-area-left));
    padding-right: calc(20px + var(--safe-area-right));
}

.footer {
    padding-bottom: calc(15px + var(--safe-area-bottom));
    padding-left: calc(15px + var(--safe-area-left));
    padding-right: calc(15px + var(--safe-area-right));
}

/* Animation for notifications */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ==================== PHASE 9: AI BOSSES & STORY MODE ==================== */

/* Narrative Overlay */
.narrative-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
}

.narrative-content {
    max-width: 800px;
    width: 90%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.narrative-text {
    font-size: 1.2em;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 20px;
    min-height: 100px;
}

.narrative-choices {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

.narrative-choice {
    padding: 12px 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.narrative-choice:hover {
    background: var(--btn-bg);
    border-color: var(--snake-color);
    transform: translateX(5px);
}

.narrative-skip {
    margin-top: 20px;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9em;
}

.narrative-skip:hover {
    background: var(--btn-bg);
    color: var(--text-primary);
}

/* Story World Map */
.story-world-map {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
}

.story-chapter {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.story-chapter-header {
    font-size: 1.5em;
    font-weight: 600;
    color: var(--snake-color);
    margin-bottom: 10px;
}

.story-nodes {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.story-node {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.story-node:hover:not(.locked):not(.completed) {
    transform: scale(1.1);
    border-color: var(--btn-bg);
}

.story-node.locked {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-tertiary);
}

.story-node.completed {
    background: var(--snake-color);
    border-color: var(--snake-color);
}

.story-node.current {
    border-color: #ffd700;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.story-node-icon {
    font-size: 1.5em;
}

/* Lore Entries */
.lore-entry {
    padding: 15px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
}

.lore-entry.unlocked {
    border-color: var(--snake-color);
}

.lore-entry-title {
    font-size: 1.2em;
    font-weight: 600;
    color: var(--snake-color);
    margin-bottom: 5px;
}

.lore-entry-text {
    color: var(--text-primary);
    line-height: 1.6;
}

.lore-entry-locked {
    opacity: 0.5;
    color: var(--text-secondary);
    font-style: italic;
}

/* Debug Panels (Phase 9) */
.debug-panel {
    position: fixed;
    background: rgba(0, 0, 0, 0.9);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    z-index: 10001;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
}

.boss-ai-debugger {
    top: 10px;
    left: 10px;
}

.story-generator {
    top: 10px;
    right: 10px;
}

.event-timeline {
    bottom: 10px;
    left: 10px;
    width: 400px;
}

.encounter-log {
    bottom: 10px;
    right: 10px;
    width: 400px;
}

.debug-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.debug-panel-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1em;
}

.debug-close, .debug-clear {
    background: var(--btn-bg);
    color: var(--btn-text);
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
}

.debug-close:hover, .debug-clear:hover {
    background: var(--btn-hover);
}

.debug-panel-content {
    color: var(--text-primary);
}

.debug-input-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.debug-input-group label {
    min-width: 80px;
    color: var(--text-primary);
}

.debug-input-group input,
.debug-input-group select {
    flex: 1;
    padding: 5px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
}

.debug-output {
    margin-top: 15px;
    padding: 10px;
    background: var(--bg-secondary);
    border-radius: 4px;
    font-size: 0.9em;
}

.boss-debug-item {
    padding: 10px;
    margin-bottom: 10px;
    background: var(--bg-secondary);
    border-radius: 4px;
    border-left: 3px solid var(--snake-color);
}

.boss-debug-item h4 {
    margin: 0 0 5px 0;
    color: var(--snake-color);
}

.boss-debug-item p {
    margin: 3px 0;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.event-timeline-list,
.encounter-log-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.event-timeline-item,
.encounter-log-item {
    padding: 10px;
    background: var(--bg-secondary);
    border-radius: 4px;
    border-left: 3px solid var(--border-color);
}

.event-time,
.encounter-time {
    color: var(--text-secondary);
    font-size: 0.8em;
    margin-right: 10px;
}

.event-name,
.encounter-type {
    color: var(--snake-color);
    font-weight: 600;
    margin-right: 10px;
}

.event-data,
.encounter-data {
    margin-top: 5px;
    font-size: 0.8em;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
}

/* Boss Telegraph Indicators */
.boss-telegraph-arrow {
    stroke: #ff0000;
    stroke-width: 2;
    opacity: 0.5;
}

.boss-telegraph-line {
    stroke: #ff6b35;
    stroke-width: 3;
    opacity: 0.7;
}

.boss-telegraph-circle {
    stroke: #8a2be2;
    stroke-width: 2;
    fill: none;
    opacity: 0.4;
}

.boss-telegraph-marker {
    fill: #ff00ff;
    opacity: 0.6;
}

/* Story Mode UI */
.story-mode-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    z-index: 2000;
    display: none;
    flex-direction: column;
    padding: 20px;
    overflow-y: auto;
}

.story-mode-screen.show {
    display: flex;
}

.story-mode-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.story-mode-header h1 {
    color: var(--snake-color);
    margin: 0;
}

.story-mode-content {
    flex: 1;
    display: flex;
    gap: 20px;
}

.story-map-container {
    flex: 2;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
}

.story-info-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.story-info-panel {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 15px;
}

.story-info-panel h3 {
    color: var(--snake-color);
    margin: 0 0 10px 0;
}

.story-progress-bar {
    width: 100%;
    height: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    overflow: hidden;
    margin-top: 10px;
}

.story-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--snake-color), var(--btn-bg));
    transition: width 0.3s ease;
}

/* Character Upgrades */
.character-upgrades {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.upgrade-item {
    padding: 15px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.upgrade-item:hover:not(.max-level) {
    border-color: var(--btn-bg);
    transform: translateY(-2px);
}

.upgrade-item.max-level {
    opacity: 0.6;
    cursor: not-allowed;
}

.upgrade-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.upgrade-description {
    font-size: 0.9em;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.upgrade-level {
    color: var(--snake-color);
    font-weight: 600;
    margin-bottom: 10px;
}

.upgrade-cost {
    color: #ffd700;
    font-weight: 600;
}

/* ==================== UI TOAST ==================== */
.ui-toast {
    position: fixed;
    left: 50%;
    bottom: calc(var(--safe-area-bottom, 0px) + 24px);
    transform: translateX(-50%) translateY(20px);
    background: rgba(0, 0, 0, 0.85);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    box-shadow: var(--shadow-elevation-2);
    opacity: 0;
    pointer-events: none;
    z-index: var(--z-popup);
    transition: opacity 160ms ease, transform 160ms ease;
}

.ui-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ==================== HOTKEY PANEL ==================== */
.hotkey-toggle {
    position: fixed;
    top: calc(var(--safe-area-top, 0px) + 12px);
    right: calc(var(--safe-area-right, 0px) + 12px);
    z-index: var(--z-tooltip);
    font-size: 0.9rem;
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.6);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-elevation-2);
}

.hotkey-toggle:hover:not(:disabled) {
    background: rgba(0, 0, 0, 0.8);
}

.hotkey-panel {
    position: fixed;
    top: calc(var(--safe-area-top, 0px) + 56px);
    right: calc(var(--safe-area-right, 0px) + 12px);
    z-index: var(--z-tooltip);
    min-width: 220px;
    max-width: 260px;
    padding: 10px 12px;
    border-radius: var(--radius-lg);
    background: rgba(0, 0, 0, 0.75);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
    font-size: 0.85rem;
    box-shadow: var(--shadow-elevation-3);
    opacity: 0;
    transform: translateY(-6px);
    pointer-events: none;
    transition: opacity 140ms ease, transform 140ms ease;
}

.hotkey-panel.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.hotkey-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4px;
}

.hotkey-title {
    font-weight: 600;
    letter-spacing: 0.02em;
}

.hotkey-close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: background-color 120ms ease, color 120ms ease, transform 120ms ease;
}

.hotkey-close-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    transform: scale(1.05);
}

.hotkey-list {
    list-style: none;
    margin: 4px 0 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.hotkey-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.hotkey-label {
    color: var(--text-secondary);
}

.hotkey-keys {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    color: var(--text-primary);
}

@media screen and (max-width: 600px) {
    .hotkey-toggle {
        top: calc(var(--safe-area-top, 0px) + 8px);
        right: calc(var(--safe-area-right, 0px) + 8px);
    }

    .hotkey-panel {
        top: calc(var(--safe-area-top, 0px) + 52px);
        right: calc(var(--safe-area-right, 0px) + 8px);
        min-width: 200px;
        max-width: 70vw;
    }
}

/* ==================== HIGH-CONTRAST ACCESSIBILITY MODE ==================== */
[data-high-contrast="true"] {
    --bg-primary: #000000;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --bg-elevated: #333333;
    --bg-overlay: rgba(0, 0, 0, 0.95);
    
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --text-tertiary: #ffffff;
    --text-disabled: #888888;
    
    --snake-color: #00ff00;
    --snake-glow: rgba(0, 255, 0, 0.8);
    --food-color: #ff0000;
    --border-color: #ffffff;
    
    --btn-bg: #00ff00;
    --btn-hover-bg: #00cc00;
    --btn-active-bg: #009900;
    --btn-disabled-bg: #444444;
    --btn-disabled-text: #888888;
    --btn-text: #000000;
    
    --modal-content-bg: #1a1a1a;
    --modal-bg: rgba(0, 0, 0, 0.98);
    
    --shadow-elevation-1: 0 2px 4px rgba(255, 255, 255, 0.2);
    --shadow-elevation-2: 0 4px 8px rgba(255, 255, 255, 0.3);
    --shadow-elevation-3: 0 8px 16px rgba(255, 255, 255, 0.4);
    --shadow-elevation-4: 0 12px 24px rgba(255, 255, 255, 0.5);
}

[data-high-contrast="true"] .btn {
    border: 2px solid var(--border-color);
    font-weight: 600;
}

[data-high-contrast="true"] .modal-content {
    border: 3px solid var(--border-color);
}

[data-high-contrast="true"] .setting-item {
    border: 2px solid var(--border-color);
}

[data-high-contrast="true"] .hud-container {
    border: 2px solid var(--border-color);
    background: rgba(0, 0, 0, 0.9);
}

/* ==================== COMPREHENSIVE RESPONSIVE DESIGN ==================== */
/* Desktop (default) - already defined above */

/* Tablet (768px - 1024px) */
@media screen and (min-width: 768px) and (max-width: 1024px) {
    :root {
        --font-base: 0.95rem;
        --spacing-md: 14px;
        --spacing-lg: 20px;
        --spacing-xl: 28px;
    }
    
    .modal-content {
        max-width: 90%;
        padding: var(--spacing-lg);
    }
    
    .mode-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .level-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .shop-grid,
    .inventory-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
}

/* Mobile Landscape (480px - 767px) */
@media screen and (min-width: 480px) and (max-width: 767px) {
    :root {
        --font-base: 0.9rem;
        --spacing-md: 12px;
        --spacing-lg: 18px;
        --spacing-xl: 24px;
    }
    
    h1 {
        font-size: 1.8em;
    }
    
    h2 {
        font-size: 1.5em;
    }
    
    .modal-content {
        max-width: 95%;
        padding: var(--spacing-md);
        max-height: 85vh;
    }
    
    .mode-buttons {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-base);
    }
    
    .header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .hud-container {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.9em;
    }
}

/* Mobile Portrait (up to 479px) */
@media screen and (max-width: 479px) {
    :root {
        --font-base: 0.85rem;
        --font-lg: 1rem;
        --font-xl: 1.125rem;
        --font-2xl: 1.25rem;
        --font-3xl: 1.5rem;
        --spacing-xs: 3px;
        --spacing-sm: 6px;
        --spacing-md: 12px;
        --spacing-lg: 16px;
        --spacing-xl: 20px;
        --radius-md: 8px;
        --radius-lg: 10px;
    }
    
    body {
        font-size: var(--font-base);
    }
    
    h1 {
        font-size: 1.5em;
        margin-bottom: var(--spacing-md);
    }

    .app-logo {
        font-size: var(--font-2xl);
    }
    
    h2 {
        font-size: 1.25em;
        margin-bottom: var(--spacing-sm);
    }
    
    h3 {
        font-size: 1.1em;
    }
    
    .header {
        padding: var(--spacing-xs) var(--spacing-sm);
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .icon-btn {
        width: 36px;
        height: 36px;
        font-size: 0.9em;
        min-width: 44px; /* Minimum touch target */
        min-height: 44px;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-base);
        min-height: 44px; /* Minimum touch target */
        border-radius: var(--radius-md);
    }
    
    .modal {
        padding: var(--spacing-sm);
    }
    
    .modal-content {
        max-width: 100%;
        padding: var(--spacing-md);
        max-height: 90vh;
        border-radius: var(--radius-lg);
    }
    
    .modal-header {
        padding: var(--spacing-sm) 0;
        margin-bottom: var(--spacing-md);
    }
    
    .modal-header h2 {
        font-size: var(--font-xl);
    }
    
    .modal-close {
        width: 36px;
        height: 36px;
        min-width: 44px;
        min-height: 44px;
    }
    
    .modal-body {
        padding: var(--spacing-sm) 0;
    }
    
    .mode-buttons {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    /* Ensure minigame buttons fit small screens and match global button sizing */
    .mode-buttons .btn {
        min-width: 0;
        width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-base);
    }
    
    .mode-btn {
        padding: var(--spacing-md);
        min-height: 80px;
    }
    
    .level-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .level-btn {
        min-height: 80px;
        font-size: var(--font-sm);
        padding: var(--spacing-xs);
    }
    
    .shop-grid,
    .inventory-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .shop-item,
    .inventory-item {
        padding: var(--spacing-sm);
        min-height: 120px;
    }
    
    .skill-tree {
        padding: var(--spacing-sm);
    }
    
    .skill-node {
        width: 50px;
        height: 50px;
        min-width: 44px;
        min-height: 44px;
    }
    
    .setting-item {
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }
    
    .achievement-item {
        padding: var(--spacing-sm);
        gap: var(--spacing-sm);
    }
    
    .hud-container {
        padding: var(--spacing-xs);
        font-size: 0.85em;
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .hud-item {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .score-container {
        font-size: 1.1em;
    }
    
    .control-pad {
        display: flex;
    }
    
    .control-btn {
        width: 60px;
        height: 60px;
        min-width: 44px;
        min-height: 44px;
        font-size: 1.2em;
    }
    
    .footer {
        padding: var(--spacing-sm);
        font-size: var(--font-xs);
    }
    
    /* Ensure all interactive elements meet minimum touch target size */
    button,
    .btn,
    .icon-btn,
    .level-btn,
    .mode-btn,
    .shop-item,
    .inventory-item,
    .skill-node,
    .control-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    /* Improve text readability on small screens */
    p, .caption, .achievement-desc, .shop-item-desc {
        font-size: var(--font-sm);
        line-height: 1.5;
    }
    
    /* Stack elements vertically on very small screens */
    .header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hud-container {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Very Small Screens (up to 320px) */
@media screen and (max-width: 320px) {
    :root {
        --font-base: 0.8rem;
        --spacing-md: 10px;
    }
    
    .modal-content {
        padding: var(--spacing-sm);
    }
    
    .level-grid {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    }
    
    .shop-grid,
    .inventory-grid {
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    }
}

/* Landscape Orientation Adjustments */
@media screen and (max-height: 500px) and (orientation: landscape) {
    .modal-content {
        max-height: 95vh;
        padding: var(--spacing-sm);
    }
    
    .header {
        padding: var(--spacing-xs);
    }
    
    .hud-container {
        padding: var(--spacing-xs);
        font-size: 0.8em;
    }
}

/* High DPI / Retina Displays */
@media screen and (-webkit-min-device-pixel-ratio: 2),
       screen and (min-resolution: 192dpi) {
    .btn,
    .icon-btn,
    .level-btn {
        border-width: 0.5px;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Print Styles */
@media print {
    .header,
    .hud-container,
    .control-pad,
    .footer,
    .modal,
    .pause-overlay,
    .game-over-overlay {
        display: none !important;
    }
    
    #gameCanvas {
        border: 1px solid #000;
    }
}

/* ==================== HOME PAGE ANIMATIONS ==================== */
/* Modern entrance animations and micro-interactions for mode select screen */

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes subtlePulse {
    0%, 100% { 
        transform: scale(1); 
        opacity: 1;
    }
    50% { 
        transform: scale(1.05); 
        opacity: 0.95;
    }
}

/* Ensure logo pulse animation works smoothly */
.app-logo-icon[data-pulse-setup="true"] {
    will-change: transform;
    transform-origin: center center;
    /* Ensure the red circle border scales smoothly with the logo */
    transition: transform 0.3s ease-in-out;
}

/* Enhanced button transitions for mode select */
.mode-buttons .btn {
    transition: all var(--transition-base);
    will-change: transform;
    position: relative;
    overflow: hidden;
}

/* Ensure reduced motion is respected */
@media (prefers-reduced-motion: reduce) {
    .mode-buttons .btn,
    .mode-select-content .app-logo,
    .app-logo-icon {
        transition: none !important;
        animation: none !important;
    }
    
    .mode-buttons .btn:hover {
        transform: none !important;
    }
}

/* ==================== FEATURED DAILY CHALLENGE MODULE ==================== */
.daily-challenge-module {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-elevation-2);
    animation: slideInUp 0.5s ease;
    text-align: left;
}

.daily-challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.daily-challenge-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-xl);
    font-weight: 700;
}

.daily-challenge-timer {
    background: var(--bg-elevated);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    color: var(--color-accent);
    font-weight: bold;
    font-size: var(--font-sm);
    white-space: nowrap;
}

.daily-challenge-content {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.daily-challenge-icon {
    font-size: 3em;
    line-height: 1;
    flex-shrink: 0;
}

.daily-challenge-info {
    flex: 1;
}

.daily-challenge-info h4 {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text-primary);
    font-size: var(--font-lg);
    font-weight: 600;
}

.daily-challenge-info p {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-size: var(--font-sm);
    line-height: var(--line-height-relaxed);
}

.daily-challenge-meta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    align-items: center;
}

.difficulty-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-xs);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.difficulty-medium { 
    background: var(--color-warning); 
    color: #000; 
}

.difficulty-hard { 
    background: var(--color-error); 
    color: #fff; 
}

.reward-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    font-size: var(--font-xs);
    color: var(--color-accent);
    font-weight: 600;
}

.completed-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-success);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: var(--font-xs);
    font-weight: bold;
}

.daily-challenge-btn {
    width: 100%;
    margin-top: var(--spacing-md);
    font-weight: 600;
}

.daily-challenge-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive adjustments for daily challenge */
@media (max-width: 768px) {
    .daily-challenge-module {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }
    
    .daily-challenge-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .daily-challenge-icon {
        font-size: 2.5em;
        text-align: center;
    }
    
    .daily-challenge-header {
        flex-direction: column;
        gap: var(--spacing-xs);
        align-items: flex-start;
    }
    
    .daily-challenge-timer {
        align-self: flex-end;
    }
}

@media (prefers-reduced-motion: reduce) {
    .daily-challenge-module {
        animation: none;
    }
}

/* ==================== PROGRESSION DASHBOARD ==================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.dashboard-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-elevation-1);
    transition: all var(--transition-base);
    text-align: center;
}

.dashboard-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevation-2);
}

.dashboard-card-wide {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .dashboard-card-wide {
        grid-column: span 1;
    }
}

.dashboard-card-icon {
    font-size: 2.5em;
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.dashboard-card-content h3 {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text-primary);
    font-size: var(--font-lg);
    font-weight: 600;
}

.dashboard-stat-large {
    font-size: var(--font-3xl);
    font-weight: bold;
    color: var(--color-primary);
    margin-top: var(--spacing-xs);
    line-height: 1.2;
}

.progress-ring-container {
    position: relative;
    display: inline-block;
    margin: var(--spacing-md) auto;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring-circle-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 8;
}

.progress-ring-circle {
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.5s ease;
}

.progress-ring-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-xl);
    font-weight: bold;
    color: var(--text-primary);
    pointer-events: none;
}

.achievements-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 300px;
    overflow-y: auto;
}

.achievement-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    text-align: left;
    transition: all var(--transition-base);
}

.achievement-item:hover {
    background: var(--bg-elevated);
    transform: translateX(4px);
}

.achievement-icon {
    font-size: 1.5em;
    flex-shrink: 0;
    line-height: 1;
}

.achievement-name {
    font-weight: bold;
    color: var(--text-primary);
    font-size: var(--font-sm);
    margin-bottom: 2px;
}

.achievement-desc {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* ==================== GLOBAL UI REDESIGN ENHANCEMENTS ==================== */
/* Enhanced design tokens and modern UI polish */

/* Smooth transitions everywhere */
* {
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Enhanced focus states for accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Enhanced cards with gradient backgrounds */
.dashboard-card,
.daily-challenge-module {
    background: var(--gradient-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

/* Mode buttons should be visible - ensure main menu buttons are always visible */
.mode-buttons .btn,
.mode-buttons .main-menu-btn {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
    height: auto !important;
    min-height: 0 !important;
}

/* Legacy button styling - main-menu-btn has its own styles */
.mode-buttons .btn:not(.main-menu-btn) {
    background: var(--gradient-primary) !important;
    color: #ffffff !important;
    border: 1px solid rgba(76, 175, 80, 0.3);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    box-shadow: var(--shadow-elevation-2) !important;
}

.mode-buttons .btn:not(.main-menu-btn):hover {
    background: var(--gradient-primary) !important;
    color: #ffffff !important;
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-colored-lg) !important;
    border-color: rgba(76, 175, 80, 0.5);
}

/* ==================== MODE CARDS GRID ==================== */
.mode-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md) 0;
}

/* Mode Card */
.mode-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-elevation-2);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    min-height: 200px;
}

.mode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mode-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-elevation-3);
    border-color: var(--color-primary);
}

.mode-card:hover::before {
    opacity: 1;
}

/* Mode Card Header */
.mode-card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.mode-card-icon {
    font-size: 3em;
    line-height: 1;
    flex-shrink: 0;
}

.mode-card-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.mode-card-name {
    margin: 0;
    font-size: var(--font-xl);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
}

.mode-card-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-xs);
    font-weight: 600;
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    align-self: flex-start;
    box-shadow: var(--shadow-sm);
}

/* Mode Card Description */
.mode-card-description {
    margin: 0 0 var(--spacing-lg) 0;
    font-size: var(--font-sm);
    color: var(--text-secondary);
    line-height: 1.5;
    flex: 1;
}

/* Mode Card Play Button */
.mode-card-play-btn {
    margin-top: auto;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-base);
    font-weight: 600;
    background: var(--gradient-primary);
    color: var(--btn-text);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-elevation-1);
    width: 100%;
    position: relative;
    overflow: hidden;
    z-index: 2;
    /* Ensure buttons remain clickable even when opacity is 0 during animation */
    pointer-events: auto !important;
}

.mode-card-play-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width var(--transition-base), height var(--transition-base);
    pointer-events: none;
    z-index: 1;
}

.mode-card-play-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevation-2);
    border-color: var(--color-primary-light);
    background: var(--gradient-primary);
}

.mode-card-play-btn:hover:not(:disabled)::before {
    width: 200px;
    height: 200px;
}

.mode-card-play-btn:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--shadow-elevation-1);
}

.mode-card-play-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* No Modes Message */
.no-modes-message {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
    font-size: var(--font-lg);
}

.mode-error {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-error);
    font-size: var(--font-base);
}

/* Mode Detection Loading */
#modeDetectionLoading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: var(--font-base);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Responsive Mode Cards */
@media (max-width: 768px) {
    .mode-cards-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        padding: var(--spacing-sm) 0;
    }
    
    .mode-card {
        min-height: 180px;
        padding: var(--spacing-md);
    }
    
    .mode-card-icon {
        font-size: 2.5em;
    }
    
    .mode-card-name {
        font-size: var(--font-lg);
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .mode-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1025px) {
    .mode-cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* Theme-specific adjustments */
[data-theme="light"] .mode-card {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    box-shadow: var(--shadow-md);
}

[data-theme="light"] .mode-card:hover {
    box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .mode-card {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .mode-card:hover {
    background: var(--bg-tertiary);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .mode-card,
    .mode-card-play-btn {
        transition: none !important;
        animation: none !important;
    }
    
    .mode-card:hover {
        transform: none !important;
    }
    
    .mode-card-play-btn:hover {
        transform: none !important;
    }
    
    #modeDetectionLoading {
        animation: none !important;
    }
}

/* Ensure button text is above shimmer effect */
.btn > * {
    position: relative;
    z-index: 2;
}

/* Specifically ensure mode button text is visible */
.mode-buttons .btn,
.mode-buttons .btn * {
    color: #ffffff !important;
    position: relative;
    z-index: 2;
}

/* Enhanced button disabled state */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: var(--shadow-elevation-1) !important;
}

/* Additional glass morphism for special cards */
.dashboard-card,
.daily-challenge-module {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

/* Respect reduced motion for all enhancements */
@media (prefers-reduced-motion: reduce) {
    * {
        transition-timing-function: ease !important;
    }
    
    .btn::before {
        transition: none !important;
        animation: none !important;
    }
}

/* ==================== WHAT'S NEW UPDATE PANEL ==================== */
.whats-new-panel {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    max-width: 400px;
    background: var(--modal-content-bg);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-elevation-4);
    z-index: var(--z-modal);
    transform: translateX(calc(100% + 50px));
    transition: transform var(--transition-slow);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    max-height: 80vh;
    overflow-y: auto;
}

.whats-new-panel.show {
    transform: translateX(0);
}

.whats-new-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: none;
    border: none;
    font-size: 1.5em;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
    transition: color var(--transition-base);
    z-index: 1;
}

.whats-new-close:hover {
    color: var(--text-primary);
}

.whats-new-content {
    padding-right: var(--spacing-md);
}

.whats-new-content h3 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
    font-size: var(--font-xl);
    font-weight: 700;
}

.whats-new-item {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.whats-new-item:last-child {
    border-bottom: none;
    margin-bottom: var(--spacing-sm);
}

.whats-new-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    gap: var(--spacing-sm);
}

.whats-new-header strong {
    color: var(--text-primary);
    font-size: var(--font-base);
    flex: 1;
}

.whats-new-version {
    font-size: var(--font-xs);
    color: var(--color-accent);
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-weight: bold;
    white-space: nowrap;
}

.whats-new-content p {
    color: var(--text-secondary);
    font-size: var(--font-sm);
    margin: 0 0 var(--spacing-sm) 0;
    line-height: var(--line-height-relaxed);
}

.whats-new-features {
    list-style: none;
    padding-left: 0;
    margin-top: var(--spacing-sm);
    margin-bottom: 0;
}

.whats-new-features li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
    font-size: var(--font-sm);
    line-height: var(--line-height-relaxed);
}

.whats-new-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.whats-new-content .btn {
    width: 100%;
    margin-top: var(--spacing-md);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .whats-new-panel {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
        transform: translateY(calc(-100% - 50px));
    }
    
    .whats-new-panel.show {
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .whats-new-panel {
        transition: none;
    }
}

/* ==================== THEME PRESET SELECTOR ==================== */
.theme-preset-selector {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.theme-preset-label {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-align: center;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.theme-preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: 0 auto;
}

.theme-preset-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-preset-btn:hover {
    transform: translateY(-2px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-elevation-2);
}

.theme-preset-btn.active {
    border-color: var(--color-primary);
    background: var(--bg-tertiary);
    box-shadow: var(--shadow-colored);
    transform: translateY(-2px);
}

.theme-preset-icon {
    font-size: 2em;
    line-height: 1;
}

.theme-preset-name {
    font-size: var(--font-xs);
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .theme-preset-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-xs);
    }
    
    .theme-preset-btn {
        padding: var(--spacing-sm);
    }
    
    .theme-preset-icon {
        font-size: 1.5em;
    }
    
    .theme-preset-name {
        font-size: 0.7rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .theme-preset-btn {
        transition: none;
    }
}

/* ==================== FEEDBACK WIDGET ==================== */
.feedback-widget-button {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    box-shadow: var(--shadow-elevation-3);
    z-index: var(--z-overlay);
    transition: all var(--transition-base);
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feedback-widget-button:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-colored-lg);
}

.feedback-widget-panel {
    position: fixed;
    bottom: 90px;
    right: var(--spacing-lg);
    width: 350px;
    max-height: 500px;
    background: var(--modal-content-bg);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-elevation-4);
    z-index: var(--z-modal);
    transform: translateY(calc(100% + 20px));
    opacity: 0;
    transition: all var(--transition-slow);
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
}

.feedback-widget-panel.open {
    transform: translateY(0);
    opacity: 1;
}

.feedback-widget-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.feedback-widget-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-lg);
    font-weight: 600;
}

.feedback-widget-close {
    background: none;
    border: none;
    font-size: 1.5em;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
    transition: color var(--transition-base);
}

.feedback-widget-close:hover {
    color: var(--text-primary);
}

.feedback-type-selector {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.feedback-type-btn {
    flex: 1;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.feedback-type-btn.active {
    border-color: var(--color-primary);
    background: var(--bg-tertiary);
    box-shadow: var(--shadow-elevation-1);
}

.feedback-widget-content {
    padding: var(--spacing-md);
}

.feedback-widget-content textarea,
.feedback-widget-content input {
    width: 100%;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: var(--font-sm);
    resize: vertical;
}

.feedback-widget-content textarea:focus,
.feedback-widget-content input:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-color: var(--color-primary);
}

.feedback-widget-content .btn {
    width: 100%;
    margin-top: var(--spacing-sm);
}

.feedback-note {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
    text-align: center;
    line-height: var(--line-height-relaxed);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .feedback-widget-button {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 50px;
        height: 50px;
        font-size: 1.2em;
    }
    
    .feedback-widget-panel {
        bottom: 70px;
        right: var(--spacing-md);
        left: var(--spacing-md);
        width: auto;
        max-width: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .feedback-widget-panel {
        transition: none;
    }
    
    .feedback-widget-button {
        transition: none;
    }
}

/* ==================== ROADMAP ==================== */
.roadmap-filters {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.roadmap-filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.roadmap-filter-btn:hover {
    border-color: var(--color-primary);
    background: var(--bg-tertiary);
}

.roadmap-filter-btn.active {
    border-color: var(--color-primary);
    background: var(--bg-tertiary);
    box-shadow: var(--shadow-elevation-1);
}

.roadmap-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-height: 60vh;
    overflow-y: auto;
}

.roadmap-item {
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-left: 4px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.roadmap-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-elevation-2);
}

.roadmap-planned { 
    border-left-color: var(--color-info); 
}

.roadmap-in_progress { 
    border-left-color: var(--color-warning); 
}

.roadmap-completed { 
    border-left-color: var(--color-success); 
}

.roadmap-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.roadmap-item-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-lg);
    font-weight: 600;
    flex: 1;
    min-width: 200px;
}

.roadmap-status-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-xs);
    font-weight: bold;
    white-space: nowrap;
}

.status-planned { 
    background: var(--color-info); 
    color: #fff; 
}

.status-in_progress { 
    background: var(--color-warning); 
    color: #000; 
}

.status-completed { 
    background: var(--color-success); 
    color: #fff; 
}

.roadmap-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-sm);
    line-height: var(--line-height-relaxed);
}

.roadmap-category {
    display: inline-block;
    padding: 2px 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: var(--font-xs);
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .roadmap-filters {
        gap: var(--spacing-xs);
    }
    
    .roadmap-filter-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-xs);
    }
    
    .roadmap-item-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .roadmap-item-header h3 {
        min-width: auto;
    }
}

@media (prefers-reduced-motion: reduce) {
    .roadmap-item {
        transition: none;
    }
    
    .roadmap-item:hover {
        transform: none;
    }
}

/* ==================== SOCIAL SHARE ==================== */
.social-share-container {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.social-share-label {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.social-share-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.social-share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    font-size: 1.2em;
    cursor: pointer;
    transition: all var(--transition-base);
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.social-share-btn:hover {
    transform: scale(1.1);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-elevation-2);
}

.social-share-btn:active {
    transform: scale(0.95);
}

/* Game UI Styling */
.game-ui {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
    width: 100%;
    max-width: 400px;
}

.game-ui-row {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: center;
    width: 100%;
    flex-wrap: wrap;
}

.game-ui-item {
    color: var(--text-primary);
    font-size: 1.2em;
    font-weight: 700;
    padding: 12px 24px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    min-width: 140px;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.game-ui-item:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 15px rgba(76, 175, 80, 0.4);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .social-share-btn {
        width: 36px;
        height: 36px;
        font-size: 1em;
    }
    
    #gameCanvas {
        width: min(90vw, 400px) !important;
        height: min(90vw, 400px) !important;
        max-width: 400px !important;
        max-height: 400px !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    .social-share-btn {
        transition: none;
    }
    
    .social-share-btn:hover {
        transform: none;
    }
}

/* Additional utility classes for inline style cleanup */
.hidden {
    display: none;
}

#gameCanvas {
    width: 400px !important;
    height: 400px !important;
    max-width: 400px !important;
    max-height: 400px !important;
}

.modal-content-narrow {
    max-width: 500px;
}

#generateProceduralBtn {
    margin-top: 20px;
    width: 100%;
}