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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

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

header {
    text-align: center;
    color: white;
    margin-bottom: 50px;
    padding: 30px 0;
}

header h1 {
    font-size: 3em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.2em;
    opacity: 0.95;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.model-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.model-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}

.model-card.special {
    grid-column: span 2;
}

.model-images {
    position: relative;
    height: 500px;
    background: #f5f5f5;
    overflow: hidden;
}

.model-images img {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.5s ease;
}

.design-img {
    opacity: 1;
    z-index: 2;
}

.product-img {
    opacity: 0;
    z-index: 1;
}

.model-card:hover .design-img {
    opacity: 0;
}

.model-card:hover .product-img {
    opacity: 1;
}

.model-info {
    padding: 25px;
}

.model-info h3 {
    font-size: 1.5em;
    color: #333;
    margin-bottom: 10px;
}

.model-desc {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.download-section {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.download-section.multi-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.download-btn.small {
    padding: 8px 16px;
    font-size: 0.9em;
    justify-content: center;
}

.download-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.download-btn.secondary {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.download-btn svg {
    width: 20px;
    height: 20px;
}

.file-size {
    color: #999;
    font-size: 0.9em;
}

.info-section {
    background: white;
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 40px;
}

.info-section h2 {
    color: #333;
    font-size: 2em;
    margin-bottom: 30px;
    text-align: center;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.info-card {
    text-align: center;
    padding: 20px;
}

.info-card h3 {
    color: #667eea;
    font-size: 1.3em;
    margin-bottom: 10px;
}

.info-card p {
    color: #666;
    line-height: 1.6;
}

footer {
    text-align: center;
    color: white;
    padding: 30px 0;
}

footer a {
    color: white;
    text-decoration: underline;
}

footer a:hover {
    opacity: 0.8;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    
    .models-grid {
        grid-template-columns: 1fr;
    }
    
    .model-card.special {
        grid-column: span 1;
    }
    
    .model-images {
        height: 300px;
    }
    
    .download-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .download-btn {
        justify-content: center;
    }
}