*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:#333;background-color:#f5f5f5}.container{max-width:1200px;margin:0 auto;padding:0 20px}header{background-color:#2c3e50;color:#fff;padding:1rem 0;box-shadow:0 2px 4px #0000001a}nav{display:flex;justify-content:space-between;align-items:center}nav h1{font-size:1.5rem}nav ul{list-style:none;display:flex;gap:2rem}nav a{color:#fff;text-decoration:none;transition:opacity .3s}nav a:hover{opacity:.8}main{min-height:calc(100vh - 140px);padding:2rem 0}.products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:2rem;margin-top:2rem}.product-card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 8px #0000001a;transition:transform .3s,box-shadow .3s;cursor:pointer}.product-card:hover{transform:translateY(-4px);box-shadow:0 4px 12px #00000026}.product-image{width:100%;height:200px;object-fit:cover;background-color:#eee}.product-info{padding:1rem}.product-title{font-size:1.1rem;font-weight:600;margin-bottom:.5rem}.product-price{color:#27ae60;font-size:1.3rem;font-weight:700}.btn{padding:.75rem 1.5rem;border:none;border-radius:4px;cursor:pointer;font-size:1rem;transition:background-color .3s}.btn-primary{background-color:#3498db;color:#fff}.btn-primary:hover{background-color:#2980b9}.btn-danger{background-color:#e74c3c;color:#fff}.btn-danger:hover{background-color:#c0392b}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-group input,.form-group textarea,.form-group select{width:100%;padding:.75rem;border:1px solid #ddd;border-radius:4px;font-size:1rem}.form-group textarea{min-height:100px;resize:vertical}footer{background-color:#2c3e50;color:#fff;text-align:center;padding:1.5rem 0;margin-top:2rem}.loading{display:flex;justify-content:center;align-items:center;min-height:200px}.spinner{border:4px solid #f3f3f3;border-top:4px solid #3498db;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}