:root {
    --primary: #2c3e50;
    --accent: #3498db;
    --success: #27ae60;
    --light: #f8f9fa;
}

body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    line-height: 1.6; 
    background-color: #f0f2f5; 
    color: var(--primary); 
    margin: 0; padding: 20px; 
}

.container { max-width: 1000px; margin: auto; background: white; padding: 30px; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }

h2 { border-bottom: 2px solid var(--accent); padding-bottom: 10px; color: var(--primary); }

/* Buttons */
button, .btn { 
    background: var(--accent); color: white; border: none; padding: 10px 20px; 
    border-radius: 4px; cursor: pointer; transition: 0.3s; text-decoration: none; display: inline-block;
}
button:hover { background: #2980b9; }

/* Grid for Catalog */
.catalog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; margin-top: 20px; }
.card { border: 1px solid #eee; border-radius: 8px; overflow: hidden; background: white; transition: transform 0.2s; }
.card:hover { transform: translateY(-5px); }
.card img { width: 100%; height: 200px; object-fit: cover; }
.card-content { padding: 15px; }

/* Tables */
table { width: 100%; border-collapse: collapse; margin-top: 20px; }
th { background: var(--light); padding: 12px; text-align: left; border-bottom: 2px solid #ddd; }
td { padding: 12px; border-bottom: 1px solid #eee; }