:root {
    --primary-color: #FF006E;
    --secondary-color: #00FF88;
    --accent-color: #00D4FF;
    --gold-color: #FFD700;
    --pink-color: #FF0080;
    --dark-bg: #0a0a0a;
    --darker-bg: #000000;
    --card-bg: rgba(255, 255, 255, 0.05);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --shadow-glow: 0 0 20px rgba(255, 0, 110, 0.3);
    --shadow-glow-blue: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-glow-green: 0 0 20px rgba(0, 255, 136, 0.3);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 0, 110, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 255, 136, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.app-header {
    text-align: center;
    padding: 20px 20px 10px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: 1.8rem;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
    text-shadow: var(--shadow-glow);
}

.app-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.app-main {
    padding-bottom: 80px;
    min-height: calc(100vh - 140px);
}

.app-section {
    display: none;
    padding: 20px;
    animation: fadeIn 0.3s ease-in-out;
}

.app-section.active {
    display: block;
}

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

/* Game Styles */
.game-container {
    max-width: 400px;
    margin: 0 auto;
}

.game-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 30px;
}

.stat-item {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--secondary-color);
}

.game-area {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px 20px;
    margin-bottom: 30px;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.game-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-glow);
    animation: pulse 1s infinite;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.game-circle:active {
    transform: scale(0.95);
}

.game-circle.hidden {
    display: none;
}

#circle-text {
    font-size: 1rem;
    font-weight: bold;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

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

.countdown {
    font-size: 4rem;
    font-weight: bold;
    color: var(--gold-color);
    text-shadow: var(--shadow-glow);
    animation: countdownPulse 1s ease-in-out;
}

.countdown.hidden {
    display: none;
}

@keyframes countdownPulse {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

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

.result-display.hidden {
    display: none;
}

.result-time {
    font-size: 3rem;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 10px;
    text-shadow: var(--shadow-glow-green);
}

.result-feedback {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.game-instructions {
    text-align: center;
    color: var(--text-secondary);
    display: block;
}

.game-instructions h3 {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.game-instructions p {
    margin-bottom: 10px;
    line-height: 1.5;
}

.game-instructions.hidden {
    display: none !important;
}

.game-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.btn {
    flex: 1;
    padding: 15px;
    border: none;
    border-radius: 15px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    backdrop-filter: blur(10px);
    -webkit-tap-highlight-color: transparent;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--pink-color));
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 0, 110, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

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

.difficulty-selector h4 {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.difficulty-buttons {
    display: flex;
    gap: 10px;
}

.difficulty-btn {
    flex: 1;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    background: var(--card-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
    -webkit-tap-highlight-color: transparent;
}

.difficulty-btn i {
    font-size: 1.2rem;
}

.difficulty-btn.active {
    background: linear-gradient(45deg, var(--accent-color), var(--secondary-color));
    color: white;
    border-color: var(--accent-color);
    box-shadow: var(--shadow-glow-blue);
}

.difficulty-btn:hover:not(.active) {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

/* Stats Styles */
.stats-container {
    max-width: 600px;
    margin: 0 auto;
}

.stats-container h2 {
    text-align: center;
    color: var(--accent-color);
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.stats-overview {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

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

.stat-icon {
    font-size: 2rem;
    min-width: 50px;
    text-align: center;
}

.stat-info {
    flex: 1;
}

.stat-title {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.stat-number {
    display: block;
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--secondary-color);
}

.recent-games h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.games-list {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    max-height: 300px;
    overflow-y: auto;
}

.game-entry {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.game-entry:last-child {
    border-bottom: none;
}

.game-time {
    font-weight: bold;
    color: var(--secondary-color);
}

.game-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.no-games {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
}

/* Rankings Styles */
.rankings-container {
    max-width: 600px;
    margin: 0 auto;
}

.rankings-container h2 {
    text-align: center;
    color: var(--gold-color);
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.ranking-tabs {
    display: flex;
    margin-bottom: 30px;
    gap: 10px;
}

.ranking-tab {
    flex: 1;
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    background: var(--card-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    backdrop-filter: blur(10px);
    -webkit-tap-highlight-color: transparent;
}

.ranking-tab.active {
    background: linear-gradient(45deg, var(--gold-color), var(--primary-color));
    color: white;
    border-color: var(--gold-color);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

.ranking-tab:hover:not(.active) {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.ranking-content {
    display: none;
}

.ranking-content.active {
    display: block;
}

.ranking-list {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
}

.ranking-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.ranking-item:last-child {
    border-bottom: none;
}

.rank-position {
    font-size: 1.5rem;
    min-width: 40px;
    text-align: center;
}

.rank-info {
    flex: 1;
    color: var(--text-primary);
}

.rank-time {
    font-weight: bold;
    color: var(--secondary-color);
}

.rank-score {
    font-weight: bold;
    color: var(--gold-color);
}

/* FAQ Styles */
.faq-container {
    max-width: 600px;
    margin: 0 auto;
}

.faq-container h2 {
    text-align: center;
    color: var(--accent-color);
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.faq-list {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    overflow: hidden;
}

.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    padding: 20px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.05);
}

.faq-question[aria-expanded="true"] {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-color);
}

.faq-icon {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--accent-color);
    transition: transform 0.3s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 20px 20px;
    color: var(--text-secondary);
    line-height: 1.6;
    animation: fadeInDown 0.3s ease;
}

.faq-answer[hidden] {
    display: none;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    padding: 10px 0;
    z-index: 1000;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    padding: 8px;
    text-decoration: none;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
}

.nav-item i {
    font-size: 1.2rem;
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 500;
}

.nav-item.active {
    color: var(--accent-color);
    text-shadow: var(--shadow-glow-blue);
}

.nav-item:hover:not(.active) {
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* Footer */
footer {
    background: var(--darker-bg);
    color: var(--text-secondary);
    text-align: center;
    padding: 20px;
    font-size: 0.8rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 60px;
}

/* Responsive Design */
@media (max-width: 480px) {
    .app-header h1 {
        font-size: 1.5rem;
    }
    
    .app-section {
        padding: 15px;
    }
    
    .game-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }
    
    .stat-item {
        padding: 12px 8px;
    }
    
    .stat-label {
        font-size: 0.7rem;
    }
    
    .stat-value {
        font-size: 1rem;
    }
    
    .game-circle {
        width: 100px;
        height: 100px;
    }
    
    #circle-text {
        font-size: 0.9rem;
    }
    
    .result-time {
        font-size: 2.5rem;
    }
    
    .countdown {
        font-size: 3rem;
    }
    
    .game-controls {
        flex-direction: column;
    }
    
    .difficulty-buttons {
        flex-direction: column;
    }
    
    .stats-overview {
        grid-template-columns: 1fr;
    }
    
    .ranking-tabs {
        flex-direction: column;
    }
    
    .nav-item span {
        font-size: 0.6rem;
    }
}

@media (max-width: 320px) {
    .app-header h1 {
        font-size: 1.3rem;
    }
    
    .game-stats {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .game-circle {
        width: 80px;
        height: 80px;
    }
    
    #circle-text {
        font-size: 0.8rem;
    }
    
    .result-time {
        font-size: 2rem;
    }
    
    .countdown {
        font-size: 2.5rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --card-bg: rgba(255, 255, 255, 0.15);
        --glass-bg: rgba(255, 255, 255, 0.2);
    }
    
    .btn, .difficulty-btn, .ranking-tab, .faq-question {
        border-width: 2px;
    }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.difficulty-btn:focus,
.ranking-tab:focus,
.faq-question:focus,
.nav-item:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.game-circle:focus {
    outline: 3px solid var(--secondary-color);
    outline-offset: 3px;
}