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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

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

header {
    text-align: center;
    margin-bottom: 30px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.main-content {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 30px;
    align-items: start;
}

.controls {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    backdrop-filter: blur(10px);
}

.controls h2 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-size: 1.5rem;
}

.control-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-weight: 600;
    color: #34495e;
    font-size: 0.95rem;
}

.control-group input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.control-group input[type="color"] {
    width: 50px;
    height: 40px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    align-self: flex-start;
}

.control-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    align-self: flex-start;
    cursor: pointer;
}

.control-group span {
    font-weight: 600;
    color: #3498db;
    font-size: 0.9rem;
}

.generate-btn, .random-btn {
    width: 100%;
    padding: 12px 20px;
    margin-top: 10px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.generate-btn {
    background: linear-gradient(45deg, #27ae60, #2ecc71);
    color: white;
}

.generate-btn:hover {
    background: linear-gradient(45deg, #229954, #27ae60);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(39, 174, 96, 0.4);
}

.random-btn {
    background: linear-gradient(45deg, #e74c3c, #c0392b);
    color: white;
}

.random-btn:hover {
    background: linear-gradient(45deg, #c0392b, #a93226);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(231, 76, 60, 0.4);
}

.tree-display {
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

#treeCanvas {
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    background: linear-gradient(to bottom, #87CEEB 0%, #98FB98 100%);
}

footer {
    text-align: center;
    margin-top: 30px;
    color: white;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .controls {
        order: 2;
    }
    
    .tree-display {
        order: 1;
    }
    
    #treeCanvas {
        width: 100%;
        max-width: 400px;
        height: auto;
    }
    
    header h1 {
        font-size: 2rem;
    }
}