.container-custom {
     max-width: 1400px;
     margin: 0 auto;
     padding: 0 30px;
 }

 .product-price-v4 {
     font-size: 22px;
     font-weight: 900;
     color: var(--primary);
     margin-bottom: 20px;
     display: block;
 }

 .product-price-v4 small {
     font-size: 14px;
     opacity: 0.7;
     margin-right: 5px;
 }

 .cart-btn-v4 {
     display: flex;
     align-items: center;
     justify-content: center;
     gap: 12px;
     width: 100%;
     background: var(--gradient-primary);
     color: #fff;
     padding: 15px;
     border-radius: 15px;
     text-decoration: none;
     font-weight: 800;
     font-size: 15px;
     border: none;
     cursor: pointer;
     transition: all 0.3s;
     box-shadow: 0 10px 20px rgba(0, 136, 204, 0.2);
 }

 .cart-btn-v4:hover {
     transform: translateY(-3px);
     box-shadow: 0 15px 30px rgba(0, 136, 204, 0.3);
     filter: brightness(1.1);
 }

 .tech-tag.product-tag {
     background: var(--primary);
     color: #fff;
 }

 .products-layout {
     display: grid;
     grid-template-columns: 280px 1fr;
     gap: 30px;
     margin-top: 40px;
     align-items: start;
 }

 .products-sidebar {
     background: rgba(10, 22, 40, 0.8);
     border: 1px solid rgba(255, 255, 255, 0.05);
     backdrop-filter: blur(10px);
     border-radius: 15px;
     padding: 25px;
     box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
     position: sticky;
     top: 100px;
 }

 .filter-group {
     margin-bottom: 25px;
     padding-bottom: 20px;
     border-bottom: 1px solid rgba(255, 255, 255, 0.05);
 }

 .filter-group:last-child {
     border-bottom: none;
     margin-bottom: 0;
     padding-bottom: 0;
 }

 .filter-title {
     font-size: 18px;
     font-weight: 800;
     margin-bottom: 15px;
     color: #fff;
     display: flex;
     align-items: center;
     gap: 10px;
 }

 .filter-title i {
     color: var(--primary);
 }

 .filter-checkbox {
     display: flex;
     align-items: center;
     margin-bottom: 10px;
     cursor: pointer;
     gap: 10px;
     font-size: 15px;
     color: rgba(255, 255, 255, 0.8);
     transition: all 0.3s;
 }

 .filter-checkbox:hover {
     color: var(--primary);
 }

 .filter-checkbox input[type="checkbox"],
 .filter-checkbox input[type="radio"] {
     width: 18px;
     height: 18px;
     accent-color: var(--primary);
     cursor: pointer;
 }

 .apply-filter-btn {
     width: 100%;
     background: var(--gradient-primary);
     color: #fff;
     border: none;
     padding: 12px;
     border-radius: 10px;
     font-size: 16px;
     font-weight: 700;
     cursor: pointer;
     transition: all 0.3s;
     display: flex;
     align-items: center;
     justify-content: center;
     gap: 8px;
     margin-top: 15px;
     box-shadow: 0 5px 15px rgba(0, 136, 204, 0.2);
 }

 .apply-filter-btn:hover {
     transform: translateY(-2px);
     box-shadow: 0 8px 20px rgba(0, 136, 204, 0.4);
     filter: brightness(1.1);
 }

 .products-grid-container {
     width: 100%;
 }

 @media (max-width: 991px) {
     .products-layout {
         grid-template-columns: 1fr;
     }

     .products-sidebar {
         position: static;
     }
 }

 .card-actions-v4 {
     display: flex;
     gap: 10px;
     margin-top: auto;
     padding-top: 15px;
     align-items: center;
 }

 .details-btn-v4 {
     flex: 1;
     display: flex;
     align-items: center;
     justify-content: center;
     gap: 8px;
     background: rgba(255, 255, 255, 0.1);
     border: 1px solid var(--primary);
     color: var(--primary);
     padding: 12px 15px;
     border-radius: 12px;
     font-size: 14px;
     font-weight: 700;
     transition: none;
     text-decoration: none;
 }

 .card-actions-v4 form {
     flex: 1;
 }

 .cart-btn-v4 {
     width: 100% !important;
     background: var(--gradient-primary) !important;
     border: none !important;
     color: #fff !important;
     padding: 12px 15px !important;
     border-radius: 12px !important;
     display: flex !important;
     align-items: center !important;
     justify-content: center !important;
     gap: 8px !important;
     font-size: 14px !important;
     font-weight: 800 !important;
     box-shadow: 0 5px 15px rgba(0, 136, 204, 0.3) !important;
     transition: all 0.3s ease !important;
     cursor: pointer;
 }

 .cart-btn-v4:hover {
     transform: translateY(-3px) !important;
     box-shadow: 0 8px 25px rgba(0, 136, 204, 0.4) !important;
     filter: brightness(1.1);
 }

 @media (max-width: 576px) {
     .card-actions-v4 {
         flex-direction: column;
     }

     .details-btn-v4,
     .cart-btn-v4 {
         width: 100% !important;
     }
 }