:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #e74c3c;
    --bg-color: #ecf0f1;
    --text-color: #2c3e50;
    --shadow-color: rgba(0, 0, 0, 0.8);
    --border-radius: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--secondary-color);
}

.camera-section {
    position: relative;
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
}

#video {
    display: none;
}

#handCanvas, #shadowCanvas {
    max-width: 100%;
    height: 480px;
    border-radius: var(--border-radius);
    margin: 0 auto;
    display: block;
}

#handCanvas {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
}

#shadowCanvas {
    background: linear-gradient(to bottom, #1a1a1a, #2a2a2a);
}

.controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

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

.btn.secondary {
    background: var(--secondary-color);
    color: white;
}

.btn.accent {
    background: var(--accent-color);
    color: white;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.shadow-info {
    margin-top: 20px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: var(--border-radius);
    text-align: center;
}

.shadow-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    margin: 10px 0;
}

.shadow-guide {
    color: var(--secondary-color);
}

.patterns-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.pattern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.pattern-card {
    background: var(--bg-color);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pattern-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.pattern-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.pattern-name {
    font-weight: 600;
    color: var(--primary-color);
}

.gallery-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.gallery-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
}

footer {
    margin-top: 60px;
    padding: 20px;
    text-align: center;
    color: var(--secondary-color);
}

.settings {
    margin-bottom: 20px;
}

select {
    padding: 8px 16px;
    border: 1px solid var(--secondary-color);
    border-radius: 20px;
    background: white;
    cursor: pointer;
    margin-left: 10px;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .pattern-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .controls {
        flex-wrap: wrap;
    }
    
    #handCanvas, #shadowCanvas {
        height: 360px;
    }
}