:root {
  /* Nike-inspired Color Palette */
  --color-black: #111111;
  --color-white: #FFFFFF;
  --color-gray-50: #F5F5F5;
  --color-gray-100: #E5E5E5;
  --color-gray-200: #CCCCCC;
  --color-gray-300: #757575;
  --color-gray-400: #505050;
  --color-accent: #111111;
  
  /* Layout */
  --container-width: 1280px;
  --radius: 8px;
  --radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  
  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-white);
  color: var(--color-black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

/* ========================================
   HEADER
======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
  transition: var(--transition);
}

.site-header.header-transparent {
  background: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.site-header.scrolled {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
  box-shadow: var(--shadow-sm);
}

.header-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.brand {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-text {
  color: var(--color-black);
}

.header-transparent .brand-text {
  color: var(--color-white);
}

.brand-dot {
  color: var(--color-gray-300);
}

.header-transparent .brand-dot {
  color: rgba(255, 255, 255, 0.7);
}

.brand img {
  height: 48px;
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-black);
  transition: var(--transition);
  position: relative;
}

.header-transparent .nav-link {
  color: var(--color-white);
}

.nav-link:hover {
  color: var(--color-gray-300);
}

.btn-cart {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-black);
  color: var(--color-white);
  border: none;
  border-radius: 24px;
  padding: 10px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.header-transparent .btn-cart {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.btn-cart:hover {
  transform: scale(1.05);
}

/* ========================================
   HERO SECTION
======================================== */
.hero {
  background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-400) 100%);
  color: var(--color-white);
  padding: 120px 0 80px;
  margin-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="white" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-wrapper {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 600px;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
}

.hero-image {
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ========================================
   BUTTONS
======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 24px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-white);
  color: var(--color-black);
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.btn-full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ========================================
   BENEFITS SECTION
======================================== */
.benefits-section {
  background: var(--color-gray-50);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.benefit-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.benefit-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.benefit-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: var(--color-black);
  color: var(--color-white);
  border-radius: 50%;
  margin-bottom: 20px;
}

.benefit-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.benefit-card p {
  color: var(--color-gray-300);
  font-size: 15px;
  line-height: 1.6;
}

/* ========================================
   CATALOG SECTION
======================================== */
.catalog-section {
  background: var(--color-white);
}

.catalogue-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
}

/* Filters Sidebar */
.filters-sidebar {
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
  padding: 24px;
  height: fit-content;
  position: sticky;
  top: 80px;
}

.filters-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
}

.filter-group {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-gray-100);
}

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

.filter-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gray-400);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box svg {
  position: absolute;
  left: 12px;
  color: var(--color-gray-300);
}

.search-box input {
  width: 100%;
  padding: 10px 12px 10px 40px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
  background: var(--color-white);
  font-size: 14px;
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--color-black);
}

.filter-select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
  background: var(--color-white);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.filter-select:focus {
  outline: none;
  border-color: var(--color-black);
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-badge {
  padding: 6px 12px;
  border: 1px solid var(--color-gray-200);
  background: var(--color-white);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-transform: capitalize;
}

.filter-badge:hover {
  border-color: var(--color-black);
  background: var(--color-gray-50);
}

.filter-badge.active {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

/* Products Main */
.products-main {
  min-height: 500px;
}

.section-header {
  margin-bottom: 32px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 8px;
}

.section-subtitle {
  color: var(--color-gray-300);
  font-size: 16px;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* Product Card */
.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-gray-200);
}

.p-img {
  aspect-ratio: 4/3;
  background: var(--color-gray-50);
  overflow: hidden;
  cursor: pointer;
}

.p-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.product-card:hover .p-img img {
  transform: scale(1.05);
}

.p-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.p-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}

.p-title a:hover {
  color: var(--color-gray-300);
}

.p-desc {
  font-size: 14px;
  color: var(--color-gray-300);
  margin-bottom: 16px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.p-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.p-cat {
  font-size: 13px;
  color: var(--color-gray-300);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.p-subcat {
  font-weight: 600;
  color: var(--color-gray-400);
}

.p-price {
  font-weight: 800;
  font-size: 20px;
  margin-left: auto;
}

.p-color-label {
  text-transform: capitalize;
  font-size: 14px;
}

.p-sizes {
  margin-bottom: 16px;
  min-height: 32px;
}

.size-options {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.btn-size {
  padding: 6px 12px;
  border: 1px solid var(--color-gray-200);
  background: var(--color-white);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.btn-size:hover {
  border-color: var(--color-black);
  background: var(--color-gray-50);
}

.btn-size.active {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.add-to-cart-sized {
  width: 100%;
  margin-top: auto;
}

/* ========================================
   TESTIMONIALS
======================================== */
.testimonials-section {
  background: var(--color-gray-50);
  text-align: center;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.testimonial-card p {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 16px;
  font-style: italic;
}

.testimonial-card cite {
  font-style: normal;
  font-weight: 600;
  color: var(--color-gray-300);
}

/* ========================================
   FAQ
======================================== */
.faq-section {
  background: var(--color-white);
}

.faq-item {
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 16px;
  cursor: pointer;
  transition: var(--transition);
}

.faq-item:hover {
  background: var(--color-gray-100);
}

.faq-item summary {
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin-top: 12px;
  color: var(--color-gray-300);
  line-height: 1.6;
}

/* ========================================
   NEWSLETTER
======================================== */
.newsletter-section {
  background: var(--color-black);
  color: var(--color-white);
  padding: 80px 0;
}

.newsletter-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.newsletter-content h3 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
}

.newsletter-content p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
}

.newsletter-form {
  display: flex;
  gap: 12px;
}

.newsletter-form input {
  padding: 14px 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  min-width: 300px;
  font-size: 15px;
}

.newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.newsletter-form input:focus {
  outline: none;
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.15);
}

/* ========================================
   CART DRAWER
======================================== */
.cart-drawer {
  position: fixed;
  top: 0;
  right: -480px;
  width: 480px;
  height: 100%;
  background: var(--color-white);
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.15);
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  z-index: 1000;
}

.cart-drawer.open {
  right: 0;
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px;
  border-bottom: 1px solid var(--color-gray-100);
}

.cart-header h3 {
  font-size: 20px;
  font-weight: 700;
}

.btn-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.btn-close:hover {
  opacity: 0.6;
}

.cart-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.cart-row {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 16px;
  align-items: center;
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 16px;
}

.cart-row img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius);
}

.qty {
  display: flex;
  align-items: center;
  gap: 8px;
}

.qty button {
  width: 28px;
  height: 28px;
  border: 1px solid var(--color-gray-200);
  background: var(--color-white);
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
}

.qty button:hover {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.cart-footer {
  border-top: 1px solid var(--color-gray-100);
  padding: 24px;
}

.cart-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  font-size: 18px;
}

.cart-total strong {
  font-size: 24px;
  font-weight: 800;
}

/* ========================================
   FOOTER
======================================== */
.site-footer {
  background: var(--color-gray-50);
  padding: 60px 0 0;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-gray-100);
}

.footer-brand {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.footer-text {
  color: var(--color-gray-300);
  margin-bottom: 16px;
  line-height: 1.6;
}

.footer-copy {
  color: var(--color-gray-300);
  font-size: 13px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  color: var(--color-gray-300);
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--color-black);
}

.footer-credit {
  text-align: center;
  padding: 24px 0;
  color: var(--color-gray-300);
  font-size: 14px;
}

.footer-credit a {
  color: var(--color-black);
  font-weight: 600;
}

/* ========================================
   TOAST NOTIFICATION
======================================== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translate(-50%, 100px);
  background: var(--color-black);
  color: var(--color-white);
  padding: 16px 32px;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  visibility: hidden;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 600;
}

.toast.show {
  visibility: visible;
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ========================================
   RESPONSIVE
======================================== */
@media (max-width: 1024px) {
  .catalogue-layout {
    grid-template-columns: 1fr;
  }
  
  .filters-sidebar {
    display: none;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-wrapper {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 40px;
  }
  
  .hero-image {
    height: 300px;
  }
  
  .benefits-grid,
  .testimonials-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .newsletter-card {
    flex-direction: column;
    text-align: center;
  }
  
  .newsletter-form {
    width: 100%;
    flex-direction: column;
  }
  
  .newsletter-form input {
    width: 100%;
    min-width: auto;
  }
  
  .cart-drawer {
    width: 100%;
    right: -100%;
  }
  
  .nav {
    gap: 16px;
  }
  
  .nav-link {
    display: none;
  }
}

@media (max-width: 560px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .hero {
    padding: 80px 0 60px;
  }
  
  .hero-title {
    font-size: 32px;
  }
  
  .section {
    padding: 60px 0;
  }
}