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

:root {
    --bg-primary: #E8E3D8;
    --bg-secondary: #F5F2EB;
    --text-primary: #1A1A1A;
    --text-secondary: #666666;
    --accent-coral: #CC6B5E;
    --accent-coral-light: #E89B8F;
    --border-color: #D4CFC4;
    --success: #7C9473;
    --error: #B85450;
    --warning: #D4A373;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 24px;
}

header h1 {
    font-size: 2.25rem;
    font-weight: 400;
    margin-bottom: 8px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.game-area {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 24px;
    margin-bottom: 20px;
    align-items: stretch;
}

.game-info-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
    height: 100%;
}

.video-container {
    position: relative;
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

#video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transform: scaleX(-1);
}

#canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: scaleX(-1);
}

.gesture-indicator {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(26, 26, 26, 0.85);
    backdrop-filter: blur(10px);
    color: white;
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.game-info {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 28px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: 100%;
    justify-content: space-between;
}

.score-board {
    display: flex;
    justify-content: space-around;
    gap: 16px;
}

.score {
    text-align: center;
    padding: 20px;
    background: var(--bg-primary);
    border-radius: 8px;
    flex: 1;
    border: 1px solid var(--border-color);
}

.score h3 {
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.score-number {
    font-size: 3rem;
    font-weight: 300;
    color: var(--text-primary);
    line-height: 1;
}

.status {
    text-align: center;
    padding: 16px;
    background: var(--bg-primary);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.status.win {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.status.lose {
    background: var(--error);
    color: white;
    border-color: var(--error);
}

.status.tie {
    background: var(--warning);
    color: white;
    border-color: var(--warning);
}

.status.detecting {
    background: var(--accent-coral);
    color: white;
    border-color: var(--accent-coral);
    animation: pulse 0.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.85; }
}

.choices {
    display: flex;
    gap: 16px;
}

.choice-box {
    flex: 1;
    text-align: center;
    padding: 20px;
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.choice-box h4 {
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.choice-display {
    font-size: 2.5rem;
    font-weight: 400;
}

.play-btn, .reset-btn {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.02em;
}

.play-btn {
    background: var(--accent-coral);
    color: white;
    border: 2px solid var(--accent-coral);
}

.play-btn:hover:not(:disabled) {
    background: var(--accent-coral-light);
    border-color: var(--accent-coral-light);
    transform: translateY(-1px);
}

.play-btn:active:not(:disabled) {
    transform: translateY(0);
}

.play-btn:disabled {
    background: var(--border-color);
    border-color: var(--border-color);
    color: var(--text-secondary);
    cursor: not-allowed;
}

.reset-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

.reset-btn:hover {
    background: var(--bg-primary);
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.instructions {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    margin-top: auto;
}

.instructions h3 {
    color: var(--text-primary);
    margin-bottom: 8px;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.gesture-guide {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.gesture-item {
    text-align: center;
    flex: 0 0 auto;
}

.gesture-item .emoji {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 3px;
    filter: grayscale(0.1);
}

.gesture-item p {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.75rem;
    line-height: 1.2;
}

footer {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
    font-size: 0.8rem;
}

footer a {
    color: var(--accent-coral);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

footer a:hover {
    border-bottom-color: var(--accent-coral);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .game-area {
        grid-template-columns: 1fr;
    }

    .game-info-section {
        max-width: 600px;
        margin: 0 auto;
    }

    header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    body {
        padding: 16px;
    }

    header {
        margin-bottom: 20px;
    }

    header h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .game-info {
        padding: 20px;
    }

    .score-number {
        font-size: 2.5rem;
    }

    .gesture-guide {
        gap: 20px;
    }

    .instructions {
        padding: 12px 16px;
    }

    .choice-display {
        font-size: 2rem;
    }
}