* {
    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%);
    color: #333;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    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);
}

.built-with {
    font-size: 0.9rem;
    opacity: 0.9;
}

.built-with a {
    color: #fff;
    text-decoration: underline;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 20px;
}

.view-section {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.view-header h2 {
    color: #667eea;
    font-size: 1.5rem;
}

.slice-info {
    background: #f0f0f0;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: bold;
    color: #667eea;
}

.controls {
    margin-bottom: 20px;
}

.control-group {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    gap: 15px;
}

.control-group label {
    font-weight: 600;
    min-width: 150px;
    color: #555;
}

.control-group input[type="range"] {
    flex: 1;
    height: 6px;
    background: #ddd;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: #667eea;
    border-radius: 50%;
    cursor: pointer;
}

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

.control-group span {
    font-weight: 600;
    color: #667eea;
    min-width: 40px;
}

#canvas3d {
    width: 100%;
    height: 400px;
    border: 2px solid #667eea;
    border-radius: 10px;
    overflow: hidden;
}

#sliceCanvas {
    width: 100%;
    height: 400px;
    border: 2px solid #764ba2;
    border-radius: 10px;
    background: #000;
}

.export-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

.export-btn:hover {
    transform: translateY(-2px);
}

.export-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.progress-bar {
    width: 100%;
    height: 30px;
    background: #f0f0f0;
    border-radius: 15px;
    overflow: hidden;
    position: relative;
    margin-top: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 600;
    color: #333;
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .control-group {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .control-group label {
        min-width: auto;
    }
}