/* ========================================
   CSS RESET & ROOT VARIABLES
   ======================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Racing Theme */
    --color-primary: #FF0000;
    --color-secondary: #0066FF;
    --color-accent: #FFD700;
    --color-success: #00CC00;
    --color-warning: #FFA500;
    --color-danger: #CC0000;
    
    --color-road: #2C2C2C;
    --color-road-line: #FFFFFF;
    --color-grass: #228B22;
    --color-sky: #87CEEB;
    --color-track-border: #FF0000;
    
    --color-bg-light: #F5F5F5;
    --color-bg-dark: #1A1A1A;
    --color-text: #2C2C2C;
    --color-text-light: #FFFFFF;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-primary: 'Segoe UI', 'Arial', sans-serif;
    --font-racing: 'Impact', 'Arial Black', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(255, 215, 0, 0.5);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Race Track */
    --track-height: 300px;
    --lane-height: 120px;
}

/* ========================================
   BASE STYLES
   ======================================== */
html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    background: var(--color-sky);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

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

/* ========================================
   BACKGROUND RACING ELEMENTS
   ======================================== */
.background-racing {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.sky-elements {
    position: absolute;
    width: 100%;
    height: 50%;
}

.sun {
    position: absolute;
    top: 50px;
    right: 100px;
    width: 80px;
    height: 80px;
    background: radial-gradient(circle, #FFD700 0%, #FFA500 100%);
    border-radius: var(--radius-full);
    box-shadow: 0 0 50px rgba(255, 215, 0, 0.6);
    animation: pulse 3s ease-in-out infinite;
}

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

.cloud {
    position: absolute;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 100px;
    animation: float-clouds 40s linear infinite;
}

.cloud::before,
.cloud::after {
    content: '';
    position: absolute;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 100px;
}

.cloud-1 {
    width: 100px;
    height: 40px;
    top: 80px;
    left: -150px;
}

.cloud-1::before {
    width: 50px;
    height: 50px;
    top: -25px;
    left: 15px;
}

.cloud-1::after {
    width: 60px;
    height: 35px;
    top: -15px;
    right: 15px;
}

.cloud-2 {
    width: 120px;
    height: 45px;
    top: 150px;
    left: -200px;
    animation-duration: 50s;
    animation-delay: 10s;
}

.cloud-2::before {
    width: 55px;
    height: 55px;
    top: -28px;
    left: 20px;
}

.cloud-2::after {
    width: 65px;
    height: 40px;
    top: -18px;
    right: 20px;
}

.cloud-3 {
    width: 90px;
    height: 35px;
    top: 120px;
    left: -120px;
    animation-duration: 45s;
    animation-delay: 5s;
}

.cloud-3::before {
    width: 45px;
    height: 45px;
    top: -20px;
    left: 12px;
}

.cloud-3::after {
    width: 50px;
    height: 32px;
    top: -12px;
    right: 12px;
}

@keyframes float-clouds {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(calc(100vw + 300px));
    }
}

.grandstand {
    position: absolute;
    bottom: 0;
    width: 100px;
    height: 200px;
    background: repeating-linear-gradient(
        0deg,
        var(--color-primary) 0px,
        var(--color-primary) 10px,
        var(--color-text-light) 10px,
        var(--color-text-light) 20px
    );
    opacity: 0.3;
}

.grandstand-left {
    left: 0;
    transform: skewY(-5deg);
}

.grandstand-right {
    right: 0;
    transform: skewY(5deg);
}

/* ========================================
   MAIN CONTAINER
   ======================================== */
.game-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: calc(100vh - 60px);
}

/* ========================================
   HEADER
   ======================================== */
.game-header {
    background: linear-gradient(135deg, var(--color-bg-dark), var(--color-road));
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    margin-bottom: var(--spacing-xl);
    border: 3px solid var(--color-primary);
}

.game-title {
    font-family: var(--font-racing);
    font-size: var(--font-size-2xl);
    color: var(--color-text-light);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.flag-icon {
    font-size: var(--font-size-2xl);
    animation: wave 1s ease-in-out infinite;
    display: inline-block;
}

@keyframes wave {
    0%, 100% {
        transform: rotate(-10deg);
    }
    50% {
        transform: rotate(10deg);
    }
}

.game-stats {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    color: var(--color-text-light);
    min-width: 120px;
    text-align: center;
}

.stat-label {
    display: block;
    font-size: var(--font-size-sm);
    opacity: 0.8;
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: bold;
    color: var(--color-accent);
}

.stat-total {
    font-size: var(--font-size-lg);
    opacity: 0.7;
}

.turbo-meter {
    min-width: 200px;
}

.turbo-bar {
    width: 100%;
    height: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-top: var(--spacing-xs);
}

.turbo-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-warning), var(--color-accent));
    width: 0%;
    transition: width var(--transition-normal);
    box-shadow: 0 0 10px var(--color-accent);
}

/* ========================================
   SCREENS
   ======================================== */
.screen {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.screen.active {
    display: block;
}

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

/* ========================================
   WELCOME SCREEN
   ======================================== */
.welcome-content {
    background: rgba(255, 255, 255, 0.98);
    padding: var(--spacing-xxl);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.8);
}

.welcome-car {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
    animation: race-entrance 1s ease-out;
}

@keyframes race-entrance {
    from {
        transform: translateX(-100vw);
    }
    to {
        transform: translateX(0);
    }
}

.welcome-content h2 {
    font-family: var(--font-racing);
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.welcome-content > p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.table-selector,
.difficulty-selector {
    margin-bottom: var(--spacing-xl);
}

.table-selector h3,
.difficulty-selector h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-secondary);
}

.table-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--spacing-sm);
    max-width: 600px;
    margin: 0 auto;
}

.btn-table {
    aspect-ratio: 1;
    font-size: var(--font-size-xl);
    font-weight: bold;
    background: linear-gradient(135deg, var(--color-bg-light), #E0E0E0);
    border: 3px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-table:hover,
.btn-table:focus {
    transform: scale(1.15);
    border-color: var(--color-primary);
    background: linear-gradient(135deg, var(--color-accent), var(--color-warning));
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn-table.selected {
    background: linear-gradient(135deg, var(--color-primary), var(--color-danger));
    color: var(--color-text-light);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.btn-random {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-md);
}

.btn-random span:first-child {
    font-size: var(--font-size-2xl);
}

.difficulty-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.btn-difficulty {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-bg-light), #E0E0E0);
    border: 3px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.btn-difficulty:hover,
.btn-difficulty:focus {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.btn-difficulty.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-danger));
    color: var(--color-text-light);
    border-color: var(--color-accent);
}

.btn-difficulty .icon {
    font-size: 2.5rem;
}

.btn-difficulty .sub {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
    font-weight: bold;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.btn:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-danger));
    color: var(--color-text-light);
    border: 2px solid var(--color-accent);
}

.btn-primary:hover:not(:disabled),
.btn-primary:focus:not(:disabled) {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: var(--font-size-xl);
}

/* ========================================
   GAME SCREEN - RACE TRACK
   ======================================== */
.race-track {
    background: var(--color-grass);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--color-track-border);
}

.track-container {
    position: relative;
    background: var(--color-road);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    min-height: var(--track-height);
}

.start-line,
.finish-line {
    position: absolute;
    font-family: var(--font-racing);
    font-size: var(--font-size-lg);
    font-weight: bold;
    color: var(--color-text-light);
    background: rgba(0, 0, 0, 0.5);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    z-index: 2;
}

.start-line {
    top: 10px;
    left: 10px;
}

.finish-line {
    top: 50%;
    right: 10px;
    transform: translateY(-50%);
    background: repeating-linear-gradient(
        45deg,
        #000 0px,
        #000 10px,
        #fff 10px,
        #fff 20px
    );
    color: var(--color-accent);
    padding: var(--spacing-md) var(--spacing-sm);
    animation: finish-glow 1s ease-in-out infinite;
}

@keyframes finish-glow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(255, 215, 0, 1);
    }
}

.checkered-flag {
    font-size: var(--font-size-3xl);
    animation: wave 0.8s ease-in-out infinite;
}

.lane {
    position: relative;
    height: var(--lane-height);
    border-bottom: 3px dashed var(--color-road-line);
    display: flex;
    align-items: center;
}

.lane:last-child {
    border-bottom: none;
}

.lane-label {
    position: absolute;
    left: -50px;
    font-weight: bold;
    color: var(--color-text-light);
    background: rgba(0, 0, 0, 0.5);
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
}

.race-car {
    font-size: 3rem;
    position: absolute;
    left: 0;
    transition: left var(--transition-slow) cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 1;
    filter: drop-shadow(2px 2px 4px rgba(0, 0, 0, 0.5));
}

.race-car.boosting {
    animation: turbo-boost 0.5s ease-in-out;
}

@keyframes turbo-boost {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.3) translateX(10px);
    }
}

.progress-markers {
    position: absolute;
    width: 100%;
    display: flex;
    justify-content: space-around;
    top: -20px;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    opacity: 0.5;
}

/* ========================================
   QUESTION PANEL
   ======================================== */
.question-panel {
    background: rgba(255, 255, 255, 0.98);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--color-secondary);
}

.question-header {
    margin-bottom: var(--spacing-lg);
}

.timer-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.timer-container.hidden {
    display: none;
}

.timer-icon {
    font-size: var(--font-size-2xl);
}

.timer-bar {
    flex: 1;
    height: 25px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.timer-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-success), var(--color-warning), var(--color-danger));
    width: 100%;
    transition: width 0.1s linear;
}

.timer-text {
    font-weight: bold;
    font-size: var(--font-size-xl);
    min-width: 50px;
    text-align: right;
}

.question-content {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.question-title {
    font-size: var(--font-size-xl);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.question-display {
    background: linear-gradient(135deg, var(--color-accent), var(--color-warning));
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.question-number {
    font-family: var(--font-racing);
    font-size: var(--font-size-3xl);
    color: var(--color-bg-dark);
    text-shadow: 2px 2px 0px rgba(255, 255, 255, 0.5);
}

.answer-input-section {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.answer-input {
    flex: 1;
    padding: var(--spacing-md);
    font-size: var(--font-size-2xl);
    font-weight: bold;
    border: 4px solid var(--color-secondary);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-fast);
}

.answer-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.3);
}

.answer-input.correct {
    border-color: var(--color-success);
    background: rgba(0, 204, 0, 0.1);
    animation: correct-pulse 0.5s ease;
}

.answer-input.incorrect {
    border-color: var(--color-danger);
    background: rgba(204, 0, 0, 0.1);
    animation: shake 0.5s ease;
}

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

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-10px);
    }
    75% {
        transform: translateX(10px);
    }
}

.btn-submit {
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-success), #00AA00);
    color: var(--color-text-light);
    font-size: var(--font-size-xl);
    border: 3px solid var(--color-accent);
}

.btn-submit:hover:not(:disabled),
.btn-submit:focus:not(:disabled) {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

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

.feedback-message {
    min-height: 60px;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: bold;
    margin-bottom: var(--spacing-md);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feedback-message.show {
    opacity: 1;
}

.feedback-message.success {
    background: var(--color-success);
    color: var(--color-text-light);
    animation: celebrate 0.5s ease;
}

.feedback-message.error {
    background: var(--color-danger);
    color: var(--color-text-light);
}

@keyframes celebrate {
    0%, 100% {
        transform: scale(1) rotate(0deg);
    }
    25% {
        transform: scale(1.1) rotate(-3deg);
    }
    75% {
        transform: scale(1.1) rotate(3deg);
    }
}

.turbo-boost-section {
    text-align: center;
}

.btn-turbo {
    background: linear-gradient(135deg, var(--color-accent), var(--color-warning));
    color: var(--color-bg-dark);
    font-size: var(--font-size-xl);
    padding: var(--spacing-md) var(--spacing-2xl);
    border: 3px solid var(--color-primary);
    animation: turbo-pulse 1s ease-in-out infinite;
}

.btn-turbo:disabled {
    opacity: 0.3;
    animation: none;
}

.btn-turbo:not(:disabled):hover,
.btn-turbo:not(:disabled):focus {
    transform: scale(1.1);
    box-shadow: 0 0 30px var(--color-accent);
}

@keyframes turbo-pulse {
    0%, 100% {
        box-shadow: 0 0 10px var(--color-accent);
    }
    50% {
        box-shadow: 0 0 25px var(--color-accent);
    }
}

.turbo-hint {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    opacity: 0.7;
}

/* ========================================
   GAME OVER SCREEN
   ======================================== */
.gameover-content {
    background: rgba(255, 255, 255, 0.98);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    border: 3px solid var(--color-primary);
}

.result-animation {
    font-size: 6rem;
    margin-bottom: var(--spacing-md);
}

.trophy {
    display: inline-block;
    animation: trophy-bounce 1s ease-in-out infinite;
}

@keyframes trophy-bounce {
    0%, 100% {
        transform: translateY(0) rotate(-5deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

.gameover-content h2 {
    font-family: var(--font-racing);
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.gameover-content > p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.race-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-box {
    background: linear-gradient(135deg, var(--color-accent), var(--color-warning));
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-box .stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-bg-dark);
    opacity: 0.8;
}

.stat-box .stat-value {
    font-size: var(--font-size-2xl);
    font-weight: bold;
    color: var(--color-bg-dark);
}

.stat-box .stat-value.large {
    font-size: var(--font-size-3xl);
}

.button-group {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-secondary), #0044CC);
    color: var(--color-text-light);
    border: 2px solid var(--color-text-light);
}

.btn-secondary:hover,
.btn-secondary:focus {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   SOUND INDICATOR
   ======================================== */
.sound-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 1000;
    pointer-events: none;
}

.sound-indicator.show {
    opacity: 1;
}

/* ========================================
   FOOTER
   ======================================== */
.game-footer {
    text-align: center;
    padding: var(--spacing-md);
    color: white;
    font-size: var(--font-size-sm);
    background: #333;
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
}
.game-footer p { color: white; }
.game-footer a { color: white; text-decoration: none; font-weight: bold; }
.game-footer a:hover { color: #ffd166; text-decoration: underline; }

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    :root {
        --font-size-base: 14px;
        --track-height: 250px;
        --lane-height: 100px;
    }

    .game-header {
        padding: var(--spacing-sm);
    }

    .game-title {
        font-size: var(--font-size-xl);
    }

    .game-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .table-grid {
        grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    }

    .difficulty-buttons {
        grid-template-columns: 1fr;
    }

    .lane-label {
        position: static;
        margin-bottom: var(--spacing-xs);
    }

    .answer-input-section {
        flex-direction: column;
    }

    .race-car {
        font-size: 2rem;
    }

    .question-number {
        font-size: var(--font-size-2xl);
    }

    .race-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .game-container {
        padding: var(--spacing-sm);
    }

    .welcome-car,
    .result-animation {
        font-size: 4rem;
    }

    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-lg);
    }
}

/* ========================================
   ACCESSIBILITY ENHANCEMENTS
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .btn {
        border: 3px solid currentColor;
    }
    
    .race-car {
        filter: drop-shadow(0 0 5px #000);
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .background-racing,
    .game-footer,
    .sound-indicator {
        display: none;
    }
    
    .screen {
        break-inside: avoid;
    }
}