:root{--primary-color: #3498db;--secondary-color: #2c3e50;--accent-color: #ffc107;--danger-color: #e74c3c;--light-color: #ecf0f1;--white-color: #ffffff;--text-color: #333;--border-color: #ccc}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;margin:0;background-color:#f4f7f6;color:var(--text-color)}.container{padding:20px}.fade-in{animation:fadeIn .5s ease-in-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.navbar{display:flex;justify-content:space-between;align-items:center;padding:15px 30px;background-color:var(--secondary-color);color:var(--white-color);box-shadow:0 2px 4px #0000001a;position:relative}.navbar-brand{color:var(--white-color);text-decoration:none;font-size:1.5em;font-weight:700}.navbar-links{display:flex;gap:20px;align-items:center}.navbar-links a,.navbar-auth a{color:var(--white-color);text-decoration:none;padding:5px 0}.navbar-links a.active,.navbar-auth a.active{color:var(--accent-color);font-weight:700}.navbar-auth{display:flex;gap:20px;align-items:center}.navbar-auth .user-greeting{color:var(--light-color)}.btn-logout-nav{background:var(--danger-color);color:var(--white-color);border:none;padding:8px 15px;border-radius:4px;cursor:pointer}.menu-toggle{display:none;font-size:2rem;background:none;border:none;color:#fff;cursor:pointer}.login-container{max-width:400px;margin:50px auto;padding:30px;border:1px solid var(--primary-color);border-radius:8px;box-shadow:0 4px 12px #0000001a;background-color:var(--white-color)}.login-container h2{text-align:center;color:var(--primary-color)}.login-form{display:flex;flex-direction:column;gap:15px;margin-top:20px}.login-form input{padding:12px;border-radius:4px;border:1px solid var(--border-color)}.login-form .error-message{color:var(--danger-color);margin-top:10px;text-align:center}.login-form button{padding:12px;background-color:var(--primary-color);color:var(--white-color);border:none;border-radius:4px;cursor:pointer;font-size:1.1em;margin-top:10px}.cart-container{max-width:900px;margin:20px auto;padding:20px;background-color:var(--white-color);border-radius:8px;box-shadow:0 2px 10px #0000000d}.cart-container h1{text-align:center;color:var(--secondary-color)}.cart-empty{text-align:center;font-size:1.2em;padding:40px}.cart-items-list{margin-top:30px;display:flex;flex-direction:column;gap:15px}.cart-item{display:flex;align-items:center;gap:15px;padding:15px;border:1px solid var(--border-color);border-radius:6px}.cart-item img{width:80px;height:80px;object-fit:contain;background-color:#fdfdfd;border-radius:4px}.cart-item-details{flex-grow:1;display:flex;flex-direction:column}.cart-item-title{font-weight:700}.cart-item-price{color:#555}.cart-remove{background-color:var(--danger-color);color:var(--white-color);border:none;padding:8px 12px;border-radius:4px;cursor:pointer}.cart-summary{margin-top:30px;padding-top:20px;border-top:2px solid var(--primary-color);text-align:right}.cart-total{margin-bottom:20px;font-size:1.5em}.cart-actions{display:flex;justify-content:flex-end;gap:15px;align-items:center}.btn-clear-cart,.btn-checkout{padding:12px 25px;border-radius:5px;font-weight:700;cursor:pointer;text-decoration:none;transition:all .3s ease;border:1px solid transparent}.btn-clear-cart{background-color:transparent;color:var(--danger-color);border-color:var(--danger-color)}.btn-clear-cart:hover{background-color:var(--danger-color);color:var(--white-color)}.btn-checkout{background-color:var(--primary-color);color:var(--white-color)}.products-container{padding:20px}.products-title{text-align:center;margin-bottom:30px;color:var(--secondary-color)}.filters-container{display:flex;justify-content:center;gap:20px;margin-bottom:30px;flex-wrap:wrap}.search-input,.category-select{padding:10px 15px;border:1px solid var(--border-color);border-radius:5px;font-size:1em;min-width:220px}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:25px;justify-content:center}.product-card{background-color:var(--white-color);border:1px solid #ddd;padding:15px;border-radius:8px;box-shadow:0 4px 8px #0000000d;transition:transform .3s,box-shadow .3s;display:flex;flex-direction:column;justify-content:space-between;text-align:center}.product-card:hover{transform:translateY(-5px);box-shadow:0 6px 12px #0000001a}.product-card-link{text-decoration:none;color:var(--text-color)}.product-card-image{width:100%;height:150px;object-fit:contain;margin-bottom:10px}.product-card-title{font-size:1.1em;min-height:50px;margin:0 0 10px}.product-card-footer{margin-top:auto}.product-card-price{font-weight:700;color:#27ae60;font-size:1.2em;margin-bottom:10px}.btn-add-to-cart-card{padding:10px 15px;background-color:var(--primary-color);color:var(--white-color);border:none;cursor:pointer;border-radius:5px;width:100%;font-weight:700;transition:background-color .3s ease,transform .2s ease}.btn-add-to-cart-card:hover{background-color:#2980b9}.status-message{text-align:center;padding:50px;font-size:1.5em;color:#666}.status-message.error{color:var(--danger-color)}.product-detail-container{display:flex;gap:40px;max-width:1000px;margin:40px auto;padding:30px;background-color:var(--white-color);border:1px solid #ddd;border-radius:8px}.product-detail-image-wrapper{flex:1;text-align:center}.product-detail-image{width:100%;max-height:400px;object-fit:contain}.product-detail-info{flex:2;display:flex;flex-direction:column}.product-detail-title{color:var(--secondary-color);margin-top:0}.product-detail-category{font-size:1.1em;color:#7f8c8d}.product-detail-price{font-size:1.8em;font-weight:700;color:#27ae60;margin:15px 0}.product-detail-description{line-height:1.6}.btn-add-to-cart{padding:15px 30px;background-color:var(--accent-color);color:var(--secondary-color);border:none;cursor:pointer;border-radius:4px;font-size:1.2em;margin-top:30px;font-weight:700}@media(max-width:768px){.navbar-links,.navbar-auth{display:none;flex-direction:column;width:100%;position:absolute;top:68px;left:0;background-color:var(--secondary-color);padding:15px 0}.navbar-links.active,.navbar-auth.active{display:flex}.menu-toggle{display:block}.navbar-auth{top:180px}.navbar-auth .user-greeting{display:none}.login-container,.dashboard-container{margin:20px 15px;padding:20px}.checkout-container{margin:20px 15px;padding:20px;border-radius:8px}.checkout-title{font-size:1.5em}.final-total{font-size:1.5em;margin-top:20px}.cart-item{flex-direction:column;align-items:flex-start;position:relative}.cart-item-details{margin-top:10px}.cart-remove{position:absolute;top:10px;right:10px}.cart-summary{text-align:center}.cart-actions{flex-direction:column;align-items:stretch}.filters-container{flex-direction:column;align-items:center;gap:15px}.product-detail-container{flex-direction:column;margin:20px 15px;padding:20px}}