/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;800&family=Fredoka:wght@400;600;700&display=swap');

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

:root {
    --primary-blue: #4A90E2;
    --primary-purple: #9B59B6;
    --primary-pink: #E91E63;
    --primary-orange: #FF9800;
    --primary-green: #4CAF50;
    --primary-red: #F44336;

    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --gradient-5: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    --white: #FFFFFF;
    --light-gray: #F5F7FA;
    --gray: #95A5A6;
    --dark-gray: #34495E;
    --black: #2C3E50;

    --font-primary: 'Fredoka', sans-serif;
    --font-secondary: 'Poppins', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.25);

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: var(--font-secondary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--black);
    overflow-x: hidden;
}

.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.header {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.logo {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--white);
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    margin-bottom: var(--spacing-sm);
}

.subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}

.game-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.game-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.game-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.game-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    display: block;
    text-align: center;
}

/* Yarış emojilerini sağa baktır */
.game-card[data-game="race"] .game-icon,
.game-card[data-game="car"] .game-icon,
.game-card[data-game="swim"] .game-icon,
.game-card[data-game="space"] .game-icon,
.game-card[data-game="ski"] .game-icon {
    display: inline-block;
    transform: scaleX(-1);
}

/* Tüm yarış emojilerini sağa baktır (genel) */
.race-emoji {
    display: inline-block;
    transform: scaleX(-1);
}

.game-title {
    font-family: var(--font-primary);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.game-description {
    color: var(--gray);
    text-align: center;
    font-size: 0.95rem;
    line-height: 1.6;
}

.selection-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 600px;
    margin: var(--spacing-xl) auto;
    box-shadow: var(--shadow-xl);
}

.selection-title {
    font-family: var(--font-primary);
    font-size: 2rem;
    font-weight: 700;
    color: var(--black);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.operation-grid,
.level-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.operation-btn,
.level-btn {
    padding: var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    color: var(--white);
}

.operation-btn:hover,
.level-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.op-add {
    background: var(--gradient-4);
}

.op-subtract {
    background: var(--gradient-2);
}

.op-multiply {
    background: var(--gradient-3);
}

.op-divide {
    background: var(--gradient-5);
}

.level-easy {
    background: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
}

.level-medium {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
}

.level-hard {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}

/* RACE MODE */
.race-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: var(--spacing-lg) auto;
    box-shadow: var(--shadow-xl);
}

.race-header {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--light-gray);
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
}

.header-right {
    justify-content: flex-end;
}

.header-center {
    text-align: center;
}

.player-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--light-gray);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
}

.player-avatar {
    font-size: 2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.player-name {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--gray);
    text-transform: uppercase;
}

.player-score {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--black);
}

.game-timer {
    font-family: var(--font-primary);
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.game-mode {
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 600;
}

.race-track-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1fr;
    gap: var(--spacing-lg);
    border-radius: var(--radius-md);
    flex: 1;
}

.player-section {
    display: flex;
    flex-direction: column;
}

.player1-section .calculation-display {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border: 3px solid var(--primary-blue);
}

.player2-section .calculation-display {
    background: linear-gradient(135deg, #fce4ec 0%, #f8bbd9 100%);
    border: 3px solid var(--primary-pink);
}

.calculation-display {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.calc-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.calc-question {
    font-family: var(--font-primary);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calc-answer {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-green);
    min-height: 30px;
}

.user-calc {
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
}

.calc-input-display {
    margin: var(--spacing-md) 0;
}

.answer-display {
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-primary);
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    border: 3px solid var(--primary-blue);
    border-radius: var(--radius-md);
    background: var(--white);
    color: var(--black);
    outline: none;
    cursor: default;
}

.calculator-keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.calc-key {
    padding: var(--spacing-md);
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.number-key {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

.number-key:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.clear-key {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: var(--white);
}

.clear-key:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.submit-key {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: var(--white);
    font-size: 2rem;
}

.submit-key:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.feedback-message {
    margin-top: var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
    min-height: 25px;
    text-align: center;
}

.feedback-message.correct {
    color: var(--primary-green);
}

.feedback-message.wrong {
    color: var(--primary-red);
}

.race-center {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

/* CANLI YARIŞ PİSTİ */
.live-race-track {
    flex: 1;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    min-height: 300px;
}

.race-title {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    text-align: center;
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

/* Başlıktaki yarış emojisini çevirmek için span kullanılacak */
.race-title .race-emoji {
    display: inline-block;
    transform: scaleX(-1);
}

.race-arena {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: linear-gradient(180deg, #2d5016 0%, #1e3a0f 50%, #2d5016 100%);
    border-radius: var(--radius-md);
    border: 4px solid #8B4513;
}

.race-lane {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.lane-info {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--white);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.lane-track {
    position: relative;
    height: 60px;
    background: linear-gradient(90deg,
            #D2691E 0%, #DEB887 10%, #D2691E 20%,
            #DEB887 30%, #D2691E 40%, #DEB887 50%,
            #D2691E 60%, #DEB887 70%, #D2691E 80%,
            #DEB887 90%, #D2691E 100%);
    border-radius: var(--radius-sm);
    border: 3px solid #8B4513;
    overflow: visible;
}

.lane-track::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background: repeating-linear-gradient(90deg,
            #fff 0px,
            #fff 20px,
            transparent 20px,
            transparent 40px);
    transform: translateY(-50%);
    opacity: 0.5;
}

.racer-character {
    position: absolute;
    left: 2%;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2.5rem;
    transition: left 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10;
    filter: drop-shadow(2px 2px 4px rgba(0, 0, 0, 0.5));
}

.racer-character.running {
    animation: runBounce 0.3s ease-in-out forwards;
}

@keyframes runBounce {

    0%,
    100% {
        transform: translateY(-50%) scale(1);
    }

    25% {
        transform: translateY(-60%) scale(1.1);
    }

    50% {
        transform: translateY(-50%) scale(1);
    }

    75% {
        transform: translateY(-40%) scale(1.1);
    }
}

/* Karakteri sağa (finişe) çevir - KOŞU VE AT YARIŞI İÇİN */
.character-emoji {
    display: inline-block !important;
    transform: scaleX(-1) !important;
}

/* ✅ OK ATMA DÜZELTMESİ: Yaylar zaten sağa bakıyor, çevirmeye gerek yok */
.arena-archery .character-emoji {
    transform: scaleX(1) !important;
}

/* 🚀 UZAY ROKETİ DÜZELTMESİ: Roketi sağa (finişe) yatır */
.arena-space .character-emoji {
    /* scaleX(-1)'i ezip yerine 90 derece döndürme koyuyoruz */
    transform: rotate(90deg) !important;
}

.finish-marker {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
    z-index: 5;
}

.race-message {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: 700;
    color: #FFD700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    text-align: center;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
}

/* Kazanan animasyonu */
.racer-character.winner {
    animation: celebrate 0.5s ease-in-out infinite;
}

@keyframes celebrate {

    0%,
    100% {
        transform: translateY(-50%) rotate(-5deg) scale(1.2);
    }

    50% {
        transform: translateY(-60%) rotate(5deg) scale(1.3);
    }
}

.racer-character.winner .character-emoji {
    transform: scaleX(-1);
}

/* FARKLI ARENA STİLLERİ */

/* Koşu Pisti */
.arena-track {
    background: linear-gradient(180deg, #2d5016 0%, #1e3a0f 50%, #2d5016 100%);
}

.arena-track .lane-track {
    background: linear-gradient(90deg,
            #D2691E 0%, #DEB887 10%, #D2691E 20%,
            #DEB887 30%, #D2691E 40%, #DEB887 50%,
            #D2691E 60%, #DEB887 70%, #D2691E 80%,
            #DEB887 90%, #D2691E 100%);
    border-color: #8B4513;
}

/* Okçuluk Alanı */
.arena-archery {
    background: linear-gradient(180deg, #1a472a 0%, #2d5a3f 50%, #1a472a 100%);
    border-color: #654321;
}

.arena-archery .lane-track {
    background: linear-gradient(90deg,
            #228B22 0%, #32CD32 25%, #228B22 50%,
            #32CD32 75%, #228B22 100%);
    border-color: #006400;
}

.arena-archery .lane-track::before {
    background: repeating-linear-gradient(90deg,
            transparent 0px,
            transparent 60px,
            rgba(255, 0, 0, 0.3) 60px,
            rgba(255, 0, 0, 0.3) 65px,
            transparent 65px,
            transparent 70px);
    opacity: 1;
}

.arena-archery .finish-flag::before {
    content: '🎯';
}

/* Araba Yarışı (Yol) */
.arena-road {
    background: #555;
    border-color: #333;
}

.arena-road .lane-track {
    background: #333;
    border-color: #222;
    border-left: 5px solid #fff;
    border-right: 5px solid #fff;
}

.arena-road .lane-track::before {
    background: repeating-linear-gradient(90deg,
            #fff 0px,
            #fff 20px,
            transparent 20px,
            transparent 40px);
    height: 4px;
    opacity: 0.8;
}

/* Yüzme Yarışı (Su) */
.arena-water {
    background: linear-gradient(180deg, #0288D1 0%, #03A9F4 100%);
    border-color: #01579B;
    position: relative;
    overflow: hidden;
}

.arena-water .lane-track {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(5px);
}

.arena-water .lane-track::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(45deg,
            transparent,
            transparent 10px,
            rgba(255, 255, 255, 0.1) 10px,
            rgba(255, 255, 255, 0.1) 20px);
    animation: waterFlow 20s linear infinite;
    transform: none;
    height: 100%;
    opacity: 1;
}

@keyframes waterFlow {
    0% {
        background-position: 0 0;
    }

    100% {
        background-position: 500px 0;
    }
}

/* Uzay Yarışı (Uzay) */
.arena-space {
    background: #000;
    border-color: #333;
}

.arena-space .lane-track {
    background: linear-gradient(90deg, #0f0c29, #302b63, #24243e);
    border-color: #a770ef;
    box-shadow: 0 0 10px rgba(167, 112, 239, 0.3);
}

.arena-space .lane-track::before {
    background:
        radial-gradient(white, rgba(255, 255, 255, .2) 2px, transparent 3px),
        radial-gradient(white, rgba(255, 255, 255, .15) 1px, transparent 2px),
        radial-gradient(white, rgba(255, 255, 255, .1) 2px, transparent 3px);
    background-size: 550px 550px, 350px 350px, 250px 250px;
    background-position: 0 0, 40px 60px, 130px 270px;
    height: 100%;
    transform: none;
    opacity: 0.8;
}

/* Kayak Yarışı (Kış) */
.arena-ski {
    background: linear-gradient(180deg, #E0F7FA 0%, #B2EBF2 100%);
    border-color: #81D4FA;
    position: relative;
}

.arena-ski .lane-track {
    background: rgba(255, 255, 255, 0.8);
    border-color: #e1f5fe;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.arena-ski .lane-track::before {
    background:
        radial-gradient(#81D4FA 20%, transparent 20%) 0 0,
        radial-gradient(#81D4FA 20%, transparent 20%) 8px 8px;
    background-color: transparent;
    background-size: 16px 16px;
    opacity: 0.3;
}

.progress-track {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.progress-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray);
    margin-bottom: var(--spacing-sm);
    text-align: center;
    text-transform: uppercase;
}

.progress-bar-race {
    position: relative;
    height: 40px;
    background: var(--light-gray);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-fill {
    position: absolute;
    height: 45%;
    transition: width 0.5s ease-out;
    border-radius: var(--radius-md);
}

.player1-progress {
    top: 0;
    background: linear-gradient(90deg, #4facfe 0%, #00f2fe 100%);
    width: 0%;
}

.player2-progress {
    bottom: 0;
    background: linear-gradient(90deg, #f093fb 0%, #f5576c 100%);
    width: 0%;
}

.opponent-progress {
    top: 0;
    background: linear-gradient(90deg, #f093fb 0%, #f5576c 100%);
    width: 0%;
}

.user-progress {
    bottom: 0;
    background: linear-gradient(90deg, #43e97b 0%, #38f9d7 100%);
    width: 0%;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray);
}

/* RESULT SCREEN */
.result-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 600px;
    margin: var(--spacing-xl) auto;
    box-shadow: var(--shadow-xl);
    text-align: center;
}

.result-icon {
    font-size: 8rem;
    margin-bottom: var(--spacing-lg);
}

.result-title {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: var(--spacing-md);
}

.result-stats {
    background: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

/* FOOTER */
.footer {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-section h3 {
    font-family: var(--font-primary);
    color: var(--primary-purple);
    margin-bottom: var(--spacing-sm);
    font-size: 1.2rem;
}

.footer-section p {
    color: var(--dark-gray);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.copyright {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--gray) !important;
}

.love {
    font-size: 0.8rem;
    color: var(--primary-red) !important;
    margin-top: var(--spacing-xs);
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    font-size: 1.1rem;
}

.stat-label {
    color: var(--gray);
    font-weight: 600;
}

.stat-value {
    color: var(--black);
    font-weight: 700;
}

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

.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.1rem;
    font-weight: 600;
    font-family: var(--font-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--white);
}

.btn-secondary {
    background: var(--light-gray);
    color: var(--black);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.back-btn {
    position: fixed;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    z-index: 1000;
    display: none;
}

.back-btn.active {
    display: block;
}

.back-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.sound-toggle {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    z-index: 1000;
}

.sound-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.sound-toggle.muted {
    opacity: 0.5;
}

/* Old footer styles removed */

/* RESPONSIVE */
@media (max-width: 1200px) {
    .race-track-container {
        grid-template-columns: 1fr;
    }

    .race-center {
        order: -1;
    }

    .opponent-lane {
        order: 1;
    }

    .user-lane {
        order: 2;
    }
}

@media (max-width: 768px) {
    .logo {
        font-size: 2.5rem;
    }

    .game-selection {
        grid-template-columns: 1fr;
    }

    .operation-grid,
    .level-grid {
        grid-template-columns: 1fr;
    }

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

    .track {
        height: 100px;
    }

    .racer-icon {
        font-size: 2rem;
    }

    .calc-key {
        padding: var(--spacing-sm);
        font-size: 1.2rem;
    }

    .center-icon {
        font-size: 5rem;
    }
}

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

    .logo {
        font-size: 2rem;
    }

    .game-card {
        padding: var(--spacing-md);
    }

    .player-avatar {
        font-size: 1.5rem;
        width: 40px;
        height: 40px;
    }

    .answer-display {
        font-size: 1.5rem;
    }
}

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mb-4 {
    margin-bottom: var(--spacing-lg);
}