/* Modern Connect Four Game - Clean Design */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Modern Color Palette */
    --primary-blue: #2563eb;
    --primary-blue-light: #3b82f6;
    --primary-blue-dark: #1d4ed8;
    --primary-red: #dc2626;
    --primary-red-light: #ef4444;
    --primary-red-dark: #b91c1c;
    
    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Semantic Colors */
    --success: #10b981;
    --success-light: #34d399;
    --success-dark: #059669;
    --warning: #f59e0b;
    --warning-light: #fbbf24;
    --warning-dark: #d97706;
    --danger: #ef4444;
    
    /* Background */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-900);
    line-height: 1.6;
}

/* Main Container */
#gameContainer {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-xl);
    max-width: 1200px;
    width: 100%;
    margin: var(--space-6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

#gameContainer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
}

/* Header */
#header {
    text-align: center;
    margin-bottom: var(--space-8);
    position: relative;
}

#header::after {
    content: '';
    position: absolute;
    bottom: -var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-red));
    border-radius: 2px;
    opacity: 0.6;
}

#header h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-red));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--space-2);
    letter-spacing: -0.025em;
    position: relative;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    0% {
        filter: drop-shadow(0 0 5px rgba(37, 99, 235, 0.3));
    }
    100% {
        filter: drop-shadow(0 0 15px rgba(220, 38, 38, 0.3));
    }
}

/* Team Displays */
#teamDisplays {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

#teamDisplays.animate-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.8s ease-out 0.3s forwards;
}

.team-display {
    background: var(--bg-secondary);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    text-align: center;
    border: 2px solid var(--gray-200);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

/* Animation classes for entrance effects */
.team-display.animate-in {
    transform: translateY(20px);
    opacity: 0;
    animation: slideIn var(--transition-slow) ease-out forwards;
}

.team-display.animate-in:nth-child(1) {
    animation-delay: 0.4s;
}

.team-display.animate-in:nth-child(2) {
    animation-delay: 0.6s;
}


.team-display::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gray-300);
    transition: all var(--transition-normal);
}

.team-display.blue {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(59, 130, 246, 0.1));
    border-color: rgba(37, 99, 235, 0.2);
    color: var(--primary-blue-dark);
}

.team-display.blue::before {
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-blue-light));
}

.team-display.red {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.05), rgba(239, 68, 68, 0.1));
    border-color: rgba(220, 38, 38, 0.2);
    color: var(--primary-red-dark);
}

.team-display.red::before {
    background: linear-gradient(90deg, var(--primary-red), var(--primary-red-light));
}

.team-label {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
}

.team-display.blue .team-label::after {
    content: '\e3a6'; /* material icon: circle */
    font-family: 'Material Icons';
    margin-left: var(--space-2);
    font-size: var(--font-size-base);
    color: var(--primary-blue);
}

.team-display.red .team-label::after {
    content: '\e3a6'; /* material icon: circle */
    font-family: 'Material Icons';
    margin-left: var(--space-2);
    font-size: var(--font-size-base);
    color: var(--primary-red);
}

.random-number {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-fast);
}

.random-number.animating {
    animation: numberPulse 0.6s ease-out;
}

@keyframes numberPulse {
    0% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Question Section */
#questionSection {
    margin-bottom: var(--space-8);
    opacity: 0;
    transform: scale(0.95);
    transition: all var(--transition-normal);
}

#questionSection:not(.hidden) {
    opacity: 1;
    transform: scale(1);
    animation: bounceIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

#questionBox {
    background: var(--bg-primary);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    max-width: 900px;
    margin: 0 auto;
    box-shadow: var(--shadow-md);
}

#questionHeader {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--space-6);
    color: var(--gray-800);
    position: relative;
    padding-bottom: var(--space-3);
}

#questionHeader::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--gray-300);
    border-radius: 1px;
    transition: all var(--transition-normal);
}

#questionHeader.blue {
    color: var(--primary-blue);
}

#questionHeader.blue::after {
    background: var(--primary-blue);
    width: 80px;
}

#questionHeader.red {
    color: var(--primary-red);
}

#questionHeader.red::after {
    background: var(--primary-red);
    width: 80px;
}

#questionText {
    font-size: var(--font-size-lg);
    text-align: center;
    margin-bottom: var(--space-8);
    background: var(--bg-secondary);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.7;
}

#questionText.blue {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(59, 130, 246, 0.1));
    border-color: rgba(37, 99, 235, 0.2);
    color: var(--primary-blue-dark);
}

#questionText.red {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.05), rgba(239, 68, 68, 0.1));
    border-color: rgba(220, 38, 38, 0.2);
    color: var(--primary-red-dark);
}

#answers {
    display: grid;
    gap: var(--space-3);
}

/* Remove default fieldset border and spacing for answer/category groups */
#questionSection fieldset {
    border: 0;
    margin: 0;
    padding: 0;
    min-inline-size: 0;
}

#questionSection legend {
    padding: 0;
}

.answer-option {
    background: var(--bg-secondary);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    position: relative;
    overflow: hidden;
}


.answer-option:active {
    transform: translateY(0);
    transition: transform 0.1s ease-out;
}

.answer-option.selected {
    background: var(--gray-800);
    color: white;
    border-color: var(--gray-800);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.answer-option.selected-answer {
    background: linear-gradient(135deg, var(--gray-700), var(--gray-800));
    color: white;
    border-color: var(--gray-800);
}

.answer-option.correct {
    background: linear-gradient(135deg, var(--success), var(--success-light));
    border-color: var(--success);
    color: white;
    transform: scale(1.02);
}

.answer-option.wrong {
    background: linear-gradient(135deg, var(--danger), var(--primary-red-light));
    border-color: var(--danger);
    color: white;
}

.answer-option.error {
    background: linear-gradient(135deg, var(--danger), var(--primary-red-light));
    border-color: var(--danger);
    color: white;
    cursor: default;
}


#questionHeader.error {
    color: var(--danger);
    border-bottom: 2px solid var(--danger);
    padding-bottom: var(--space-2);
}

#questionText.error {
    color: var(--primary-red-dark);
    background: rgba(220, 38, 38, 0.1);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--danger);
    margin: var(--space-4) 0;
}

/* Settings Menu */
.settings-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gray-700), var(--gray-800));
    color: white;
    border: 2px solid var(--gray-600);
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}


.settings-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.settings-menu.active {
    opacity: 1;
    visibility: visible;
}

.settings-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    min-width: 380px;
    max-width: min(500px, 90vw);
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
    position: relative;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.settings-menu.active .settings-content {
    transform: scale(1);
}

.settings-content h3 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 0 0 var(--space-4) 0;
    color: var(--text-primary);
    font-size: 22px;
    font-weight: 700;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 18px;
    color: var(--gray-500);
    cursor: pointer;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}


.setting-group {
    margin-bottom: var(--space-4);
}

.setting-group h4 {
    margin: 0 0 var(--space-3) 0;
    color: var(--text-primary);
    font-size: 18px;
    border-bottom: 2px solid var(--gray-200);
    padding-bottom: var(--space-2);
}

.controller-assignment {
    display: grid;
    grid-template-columns: 120px 1fr;
    align-items: center;
    margin-bottom: var(--space-3);
    gap: var(--space-3);
}

.controller-assignment label {
    font-weight: 600;
    color: var(--text-primary);
    min-width: 0;
}

.controller-assignment select {
    flex: 1;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color var(--transition-fast);
}

.controller-assignment select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.save-btn, .reset-btn {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    margin-right: var(--space-2);
    margin-top: var(--space-3);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.save-btn {
    background: linear-gradient(135deg, var(--success), var(--success-light));
    color: white;
}


.reset-btn {
    background: linear-gradient(135deg, var(--warning), var(--warning-light));
    color: white;
}

/* CSV Upload Styles */
.csv-upload-section {
    margin-top: var(--space-2);
}

.file-input-wrapper {
    display: flex;
    gap: var(--space-2);
    align-items: stretch;
    margin-bottom: var(--space-2);
}

.csv-upload-section input[type="file"] {
    flex: 1;
    padding: var(--space-2);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    font-size: 13px;
    color: var(--gray-700);
    transition: border-color var(--transition-fast);
    min-width: 0;
}

.csv-upload-section input[type="file"]:hover {
    border-color: var(--primary-blue);
}

.csv-upload-section input[type="file"]:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

.csv-upload-section input[type="file"]::file-selector-button {
    padding: var(--space-1) var(--space-2);
    margin-right: var(--space-2);
    border: none;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
    color: var(--gray-700);
    font-size: 12px;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.csv-upload-section input[type="file"]::file-selector-button:hover {
    background: var(--gray-200);
}

.upload-btn {
    padding: var(--space-2);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    color: white;
    min-width: 44px;
    height: 44px;
}

.upload-btn:disabled {
    background: var(--gray-400);
    cursor: not-allowed;
    opacity: 0.6;
}

.upload-btn:not(:disabled):hover {
    background: linear-gradient(135deg, var(--primary-blue-dark), var(--primary-blue));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.upload-status {
    padding: var(--space-2);
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    transition: all var(--transition-fast);
    min-height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-status:empty {
    display: none;
}

.upload-status.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-dark);
    border: 1px solid var(--success);
}

.upload-status.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.upload-status.uploading {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-blue-dark);
    border: 1px solid var(--primary-blue);
}


/* Game Board */
#gameBoard {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-8);
    padding: var(--space-4);
}

#boardCanvas {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, var(--gray-800), var(--gray-900));
    transition: transform var(--transition-normal);
    border: 3px solid rgba(255, 255, 255, 0.1);
    display: block;
}


#boardCanvas:focus {
    transform: scale(1.01);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(37, 99, 235, 0.3);
}

/* Messages */
#gameMessages {
    text-align: center;
    margin-bottom: var(--space-6);
    min-height: 80px;
    position: relative;
    display: block;
}

.message {
    font-size: var(--font-size-lg);
    font-weight: 600;
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    margin: 0;
    max-width: 600px;
    background: var(--bg-secondary);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity var(--transition-fast);
}

.message .subtext {
    display: block;
    margin-top: 6px;
    font-weight: 500;
    font-size: 0.9em;
    color: var(--gray-600);
}

.message.hidden {
    opacity: 0;
    pointer-events: none;
}

.message.winner {
    font-size: var(--font-size-2xl);
    background: linear-gradient(135deg, var(--success), var(--success-light));
    border-color: var(--success);
    color: white;
    animation: celebrate 2s ease-in-out;
}

.message.blue {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.2));
    border-color: rgba(37, 99, 235, 0.3);
    color: var(--primary-blue-dark);
}

.message.red {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.1), rgba(239, 68, 68, 0.2));
    border-color: rgba(220, 38, 38, 0.3);
    color: var(--primary-red-dark);
}

/* Controller Status */
#controllerStatus {
    display: flex;
    justify-content: space-between;
    gap: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    margin-bottom: var(--space-6);
}

.controller-status {
    flex: 1;
    text-align: center;
    padding: var(--space-2) var(--space-3);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.controller-status.connected {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
    font-weight: 500;
}

/* Virtual Controllers */
.virtual-controllers {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    margin-top: var(--space-8);
    padding: var(--space-6);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.virtual-controllers:not(.hidden) {
    opacity: 1;
    transform: translateY(0);
    animation: slideIn var(--transition-slow) ease-out;
}

.virtual-controller {
    background: var(--bg-primary);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--gray-200);
    transition: all var(--transition-normal);
}

.virtual-controller.blue {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.02), rgba(59, 130, 246, 0.05));
    border-color: rgba(37, 99, 235, 0.2);
}

.virtual-controller.red {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.02), rgba(239, 68, 68, 0.05));
    border-color: rgba(220, 38, 38, 0.2);
}

.controller-label {
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--space-4);
    color: var(--gray-800);
    position: relative;
    padding-bottom: var(--space-2);
}

.controller-label::after {
    content: '🎮';
    margin-left: var(--space-2);
    font-size: var(--font-size-base);
    opacity: 0.7;
}

.virtual-controller.blue .controller-label {
    color: var(--primary-blue);
}

.virtual-controller.red .controller-label {
    color: var(--primary-red);
}

.dpad {
    display: grid;
    grid-template-areas:
        ". up ."
        "left center right"
        ". down .";
    grid-template-columns: 60px 60px 60px;
    grid-template-rows: 60px 60px 60px;
    gap: var(--space-2);
    justify-content: center;
}

.dpad-btn {
    border: 2px solid var(--gray-300);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    user-select: none;
    box-shadow: var(--shadow-sm);
}

.dpad-btn span {
    font-size: var(--font-size-xs);
    opacity: 0.6;
    margin-top: var(--space-1);
    font-weight: 400;
}

.dpad-btn.up { grid-area: up; }
.dpad-btn.down { grid-area: down; }
.dpad-btn.left { grid-area: left; }
.dpad-btn.right { grid-area: right; }
.dpad-btn.center { grid-area: center; }


.dpad-btn:active,
.dpad-btn.pressed {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.dpad-btn.go-btn {
    background: linear-gradient(135deg, var(--success), var(--success-light));
    border-color: var(--success);
    color: white;
    font-weight: 700;
}


.virtual-controller.blue .dpad-btn:active,
.virtual-controller.blue .dpad-btn.pressed {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    color: white;
}

.virtual-controller.red .dpad-btn:active,
.virtual-controller.red .dpad-btn.pressed {
    background: var(--primary-red);
    border-color: var(--primary-red);
    color: white;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Animations */
@keyframes celebrate {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.05) rotate(-1deg); }
    50% { transform: scale(1.1); }
    75% { transform: scale(1.05) rotate(1deg); }
}

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3) translateY(-50px);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.05) translateY(0);
    }
    70% {
        transform: scale(0.95);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

.animate-fade-in {
    animation: fadeIn var(--transition-slow) ease-out;
}

.animate-slide-in {
    animation: slideIn var(--transition-normal) ease-out;
}

.animate-bounce-in {
    animation: bounceIn 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.shimmer-effect {
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    background-size: 200px 100%;
    animation: shimmer 2s infinite;
}

/* Responsive Design */
@media (max-width: 1200px) {
    #gameContainer {
        max-width: 1000px;
        margin: var(--space-4);
        padding: var(--space-6);
    }
    
    #boardCanvas {
        max-width: 100%;
        height: auto;
    }
}

@media (max-width: 1024px) {
    #gameContainer {
        margin: var(--space-4);
        padding: var(--space-6);
    }
    
    #header h1 {
        font-size: var(--font-size-3xl);
    }
    
    .team-display {
        padding: var(--space-5);
    }
    
    .random-number {
        font-size: var(--font-size-4xl);
    }
    
    #questionBox {
        padding: var(--space-6);
    }
}

@media (max-width: 768px) {
    #gameContainer {
        margin: var(--space-3);
        padding: var(--space-4);
    }
    
    #header h1 {
        font-size: var(--font-size-2xl);
        letter-spacing: -0.015em;
    }
    
    #header::after {
        width: 60px;
        height: 2px;
    }
    
    #teamDisplays {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .team-label {
        font-size: var(--font-size-base);
    }
    
    .random-number {
        font-size: var(--font-size-4xl);
    }
    
    #questionHeader {
        font-size: var(--font-size-xl);
    }
    
    #questionText {
        font-size: var(--font-size-base);
        min-height: 100px;
        padding: var(--space-4);
    }
    
    .answer-option {
        padding: var(--space-3) var(--space-4);
        font-size: var(--font-size-sm);
    }
    
    #boardCanvas {
        max-width: 100%;
        height: auto;
        border-width: 2px;
    }
    
    #controllerStatus {
        flex-direction: column;
        gap: var(--space-2);
    }
    
    .virtual-controllers {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        padding: var(--space-4);
    }
    
    .dpad {
        grid-template-columns: 50px 50px 50px;
        grid-template-rows: 50px 50px 50px;
    }
    
    .dpad-btn {
        font-size: var(--font-size-xs);
    }
    
    #gameMessages {
        min-height: 60px;
    }
    
    .message {
        font-size: var(--font-size-base);
        padding: var(--space-3) var(--space-4);
    }
    
    .message.winner {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    #gameContainer {
        margin: var(--space-2);
        padding: var(--space-3);
        border-radius: var(--radius-xl);
    }
    
    #header h1 {
        font-size: var(--font-size-xl);
        line-height: 1.2;
    }
    
    #header::after {
        width: 40px;
        height: 2px;
    }
    
    .team-display {
        padding: var(--space-4);
    }
    
    .team-label {
        font-size: var(--font-size-base);
    }
    
    .random-number {
        font-size: var(--font-size-3xl);
    }
    
    #questionBox {
        padding: var(--space-4);
    }
    
    #questionHeader {
        font-size: var(--font-size-lg);
    }
    
    #questionText {
        font-size: var(--font-size-sm);
        min-height: 80px;
        padding: var(--space-3);
    }
    
    .answer-option {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-size-xs);
    }
    
    .virtual-controllers {
        padding: var(--space-3);
        gap: var(--space-4);
    }
    
    .virtual-controller {
        padding: var(--space-4);
    }
    
    .controller-label {
        font-size: var(--font-size-base);
        margin-bottom: var(--space-3);
    }
    
    .dpad {
        grid-template-columns: 45px 45px 45px;
        grid-template-rows: 45px 45px 45px;
    }
    
    .dpad-btn {
        font-size: 10px;
    }
    
    .dpad-btn span {
        font-size: 8px;
        margin-top: 1px;
    }
    
    #gameMessages {
        min-height: 50px;
    }
    
    .message {
        font-size: var(--font-size-sm);
        padding: var(--space-2) var(--space-3);
    }
    
    .message.winner {
        font-size: var(--font-size-base);
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: var(--gray-900);
        --bg-secondary: var(--gray-800);
        --bg-tertiary: var(--gray-700);
        --gray-200: var(--gray-700);
        --gray-300: var(--gray-600);
    }
    
    body {
        color: var(--gray-100);
        background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    }
    
    #gameContainer {
        background: var(--bg-primary);
        border-color: rgba(255, 255, 255, 0.1);
        box-shadow: var(--shadow-xl), 0 0 50px rgba(0, 0, 0, 0.5);
    }
    
    .team-display {
        background: var(--bg-secondary);
        border-color: var(--gray-600);
        color: var(--gray-100);
    }
    
    #questionBox {
        background: var(--bg-secondary);
        border-color: var(--gray-600);
    }
    
    #questionText {
        background: var(--bg-tertiary);
        border-color: var(--gray-600);
        color: var(--gray-200);
    }
    
    .answer-option {
        background: var(--bg-tertiary);
        border-color: var(--gray-600);
        color: var(--gray-200);
    }
    
    
    .virtual-controllers {
        background: var(--bg-secondary);
        border-color: var(--gray-600);
    }
    
    .virtual-controller {
        background: var(--bg-tertiary);
        border-color: var(--gray-600);
    }
    
    .dpad-btn {
        background: var(--bg-secondary);
        border-color: var(--gray-500);
        color: var(--gray-200);
    }
    
}

/* Focus styles for accessibility */
.dpad-btn:focus,
.answer-option:focus,
#boardCanvas:focus {
    outline: 3px solid var(--primary-blue);
    outline-offset: 3px;
    box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.2);
}

.dpad-btn:focus-visible,
.answer-option:focus-visible {
    outline: 3px solid var(--primary-blue);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .team-display,
    .answer-option,
    .dpad-btn {
        border-width: 3px;
    }
    
    #gameContainer {
        border: 2px solid var(--gray-400);
    }
    
    .team-display::before {
        height: 6px;
    }
}

/* 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;
    }
    
    #header h1 {
        animation: none;
    }
    
    .team-display.animate-in {
        animation: none;
        opacity: 1;
        transform: none;
    }
    
    #teamDisplays.animate-in {
        animation: none;
        opacity: 1;
        transform: none;
    }
}