body {
      box-sizing: border-box;
    }
    
    * {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    }
    
    h1, h2, h3, h4, h5, h6, .headline {
      font-family: 'Bebas Neue', 'Inter', sans-serif;
      letter-spacing: 2px;
    }
    
    .bg-primary {
      background: #000000;
    }
    
    .bg-secondary {
      background: #ffffff;
    }
    
    .text-primary {
      color: #000000;
    }
    
    .text-secondary {
      color: #ffffff;
    }
    
    .accent-red {
      background: #ff0000;
      color: #ffffff;
    }
    
    .accent-border-red {
      border-color: #ff0000;
    }
    
    .hero-section {
      background: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.6)), url('https://images.unsplash.com/photo-1534438327276-14e5300c3a48?w=1920&h=1080&fit=crop');
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
    }
    
    .product-card {
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      overflow: hidden;
      position: relative;
    }
    
    .product-card:hover {
      transform: translateY(-12px);
      box-shadow: 0 25px 50px rgba(255, 0, 0, 0.3);
    }
    
    .product-card:hover .product-image {
      transform: scale(1.1);
    }
    
    .product-image {
      transition: transform 0.6s ease;
    }
    
    .product-card:hover .quick-view-overlay {
      opacity: 1;
      visibility: visible;
    }
    
    .quick-view-overlay {
      position: absolute;
      inset: 0;
      background: rgba(0, 0, 0, 0.85);
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    
    .category-card {
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    
    .category-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(255,0,0,0.1) 0%, transparent 100%);
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    
    .category-card:hover::before {
      opacity: 1;
    }
    
    .category-card:hover {
      transform: scale(1.05);
      box-shadow: 0 20px 40px rgba(255, 0, 0, 0.4);
    }
    
    .btn-primary {
      background: #ff0000;
      color: #ffffff;
      transition: all 0.3s ease;
      border: 2px solid #ff0000;
    }
    
    .btn-primary:hover {
      background: #cc0000;
      transform: scale(1.05);
      box-shadow: 0 10px 30px rgba(255, 0, 0, 0.5);
    }
    
    .btn-secondary {
      background: transparent;
      color: #ffffff;
      border: 2px solid #ffffff;
      transition: all 0.3s ease;
    }
    
    .btn-secondary:hover {
      background: #ffffff;
      color: #000000;
      transform: scale(1.05);
    }
    
    .btn-outline {
      background: transparent;
      color: #000000;
      border: 2px solid #000000;
      transition: all 0.3s ease;
    }
    
    .btn-outline:hover {
      background: #000000;
      color: #ffffff;
    }
    
    .sticky-header {
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 1000;
      backdrop-filter: blur(10px);
      background: rgba(0, 0, 0, 0.95);
      border-bottom: 1px solid rgba(255, 0, 0, 0.2);
    }
    
    .modal-backdrop {
      backdrop-filter: blur(8px);
      background: rgba(0, 0, 0, 0.9);
    }
    
    .modal-content {
      animation: slideUp 0.3s ease;
    }
    
    @keyframes slideUp {
      from {
        opacity: 0;
        transform: translateY(30px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    
    .testimonial-card {
      background: #f5f5f5;
      border-left: 4px solid #ff0000;
      filter: grayscale(0);
      transition: all 0.3s ease;
    }
    
    .testimonial-card:hover {
      filter: grayscale(0);
      transform: translateX(8px);
    }
    
    .tech-icon {
      width: 80px;
      height: 80px;
      background: #000000;
      color: #ff0000;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 40px;
      margin: 0 auto 20px;
      transition: all 0.3s ease;
    }
    
    .tech-icon:hover {
      background: #ff0000;
      color: #ffffff;
      transform: rotate(360deg);
    }
    
    .filter-btn {
      transition: all 0.3s ease;
      border: 2px solid #000000;
      background: transparent;
    }
    
    .filter-btn:hover {
      background: #000000;
      color: #ffffff;
    }
    
    .filter-btn.active {
      background: #ff0000;
      color: #ffffff;
      border-color: #ff0000;
    }
    
    .size-btn {
      width: 45px;
      height: 45px;
      border: 2px solid #000000;
      background: transparent;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.2s ease;
      font-weight: 600;
    }
    
    .size-btn:hover {
      background: #000000;
      color: #ffffff;
    }
    
    .size-btn.selected {
      background: #ff0000;
      color: #ffffff;
      border-color: #ff0000;
    }
    
    .color-swatch {
      width: 35px;
      height: 35px;
      border: 2px solid #ddd;
      cursor: pointer;
      transition: all 0.2s ease;
      border-radius: 50%;
    }
    
    .color-swatch:hover {
      transform: scale(1.2);
    }
    
    .color-swatch.selected {
      border-color: #ff0000;
      border-width: 3px;
      box-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
    }
    
    .cart-badge {
      position: absolute;
      top: -8px;
      right: -8px;
      background: #ff0000;
      color: #ffffff;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      font-weight: bold;
    }
    
    .nav-link {
      position: relative;
      transition: color 0.3s ease;
    }
    
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: #ff0000;
      transition: width 0.3s ease;
    }
    
    .nav-link:hover::after {
      width: 100%;
    }
    
    .lifestyle-card {
      position: relative;
      overflow: hidden;
      height: 300px;
    }
    
    .lifestyle-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, transparent 60%);
      z-index: 1;
    }
    
    .lifestyle-card-content {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      padding: 30px;
      z-index: 2;
      color: #ffffff;
    }
    
    .toast {
      animation: toastSlide 0.3s ease;
    }
    
    @keyframes toastSlide {
      from {
        transform: translateX(100%);
      }
      to {
        transform: translateX(0);
      }
    }