/* ===== Variables ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --secondary: #0f172a;
  --accent: #f59e0b;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.06);
  --transition: 0.2s ease;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, sans-serif;
  color: var(--gray-800);
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* ===== Layout ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }
.section-alt { background: var(--gray-50); }
.page-section { padding-top: 2rem; min-height: 60vh; }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 { font-size: 2rem; font-weight: 800; color: var(--secondary); margin-bottom: .5rem; }
.section-header p { color: var(--gray-500); font-size: 1.1rem; }
.section-footer { text-align: center; margin-top: 3rem; }

/* ===== Navbar ===== */
.navbar {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 2rem;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--secondary);
}
.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  font-weight: 800;
  font-size: .875rem;
}
.navbar-links { display: flex; gap: 1.5rem; }
.nav-link {
  color: var(--gray-600);
  font-weight: 500;
  font-size: .95rem;
  transition: color var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.navbar-actions { display: flex; align-items: center; gap: .75rem; }
.cart-link { position: relative; padding: .5rem; }
.cart-badge {
  position: absolute;
  top: 0;
  right: -2px;
  background: var(--danger);
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.navbar-toggle { display: none; background: none; border: none; cursor: pointer; padding: .5rem; }

/* Dropdown */
.dropdown { position: relative; }
.dropdown-toggle { cursor: pointer; }
.dropdown-menu {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  padding: .5rem 0;
  z-index: 200;
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-item {
  display: block;
  padding: .5rem 1rem;
  color: var(--gray-700);
  font-size: .9rem;
  transition: background var(--transition);
}
.dropdown-item:hover { background: var(--gray-50); color: var(--primary); }
.dropdown-menu hr { border: none; border-top: 1px solid var(--gray-200); margin: .25rem 0; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .625rem 1.25rem;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-outline { border-color: var(--gray-300); color: var(--gray-700); background: transparent; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-ghost { background: transparent; color: var(--gray-600); }
.btn-ghost:hover { background: var(--gray-100); color: var(--gray-800); }
.btn-lg { padding: .875rem 2rem; font-size: 1rem; }
.btn-sm { padding: .375rem .875rem; font-size: .825rem; }
.btn-block { width: 100%; }

/* ===== Inputs ===== */
.input {
  display: block;
  width: 100%;
  padding: .75rem 1rem;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: .95rem;
  color: var(--gray-800);
  transition: border-color var(--transition);
  background: #fff;
}
.input:focus { outline: none; border-color: var(--primary); }
.input::placeholder { color: var(--gray-400); }
select.input { cursor: pointer; }
textarea.input { resize: vertical; }

.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: .375rem; font-weight: 600; font-size: .9rem; color: var(--gray-700); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem 1.5rem; }
.form-full { grid-column: 1 / -1; }
.form-actions { margin-top: 2rem; display: flex; gap: 1rem; }
.checkbox-label { display: flex; align-items: center; gap: .5rem; cursor: pointer; font-weight: 500; }

/* ===== Flash Messages ===== */
.flash {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  font-size: .9rem;
  font-weight: 500;
}
.flash-success { background: #ecfdf5; color: #065f46; }
.flash-error { background: #fef2f2; color: #991b1b; }
.flash-close { background: none; border: none; font-size: 1.2rem; cursor: pointer; color: inherit; padding: 0 .5rem; }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--secondary) 0%, #1e3a5f 100%);
  color: #fff;
  padding: 6rem 0;
  text-align: center;
}
.hero-content { max-width: 750px; margin: 0 auto; }
.hero h1 { font-size: 3rem; font-weight: 800; line-height: 1.15; margin-bottom: 1.25rem; }
.text-gradient {
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle { font-size: 1.2rem; color: #94a3b8; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 1rem; justify-content: center; margin-bottom: 3rem; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 3rem; justify-content: center; border-top: 1px solid rgba(255,255,255,.1); padding-top: 2rem; }
.stat { text-align: center; }
.stat strong { display: block; font-size: 1.5rem; font-weight: 800; }
.stat span { font-size: .85rem; color: #94a3b8; }

/* ===== Categories Grid ===== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.category-card {
  background: #fff;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  transition: all var(--transition);
  color: var(--gray-800);
}
.category-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--gray-800);
}
.category-icon { margin-bottom: 1rem; color: var(--primary); }
.category-card h3 { font-size: 1.1rem; margin-bottom: .5rem; font-weight: 700; }
.category-card p { font-size: .875rem; color: var(--gray-500); }

/* ===== Products Grid ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.product-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.product-card-link { display: block; color: inherit; }
.product-image {
  position: relative;
  height: 200px;
  background: var(--gray-100);
  overflow: hidden;
}
.product-image img { width: 100%; height: 100%; object-fit: cover; }
.product-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-light), #ede9fe);
  color: var(--primary);
}
.product-image-placeholder-lg {
  height: 400px;
  border-radius: var(--radius);
  flex-direction: column;
  gap: 1rem;
}
.product-image-placeholder-lg span { font-weight: 600; }
.product-image-placeholder-sm {
  width: 80px;
  height: 80px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--gray-400);
}
.product-badge {
  position: absolute;
  top: .75rem;
  right: .75rem;
  background: var(--danger);
  color: #fff;
  padding: .25rem .75rem;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 700;
}
.product-info { padding: 1.25rem; }
.product-category {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: .375rem;
}
.product-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: .5rem;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-desc {
  font-size: .875rem;
  color: var(--gray-500);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: .75rem;
}
.product-meta { display: flex; gap: 1rem; font-size: .8rem; color: var(--gray-400); margin-bottom: .75rem; }
.product-price { display: flex; align-items: baseline; gap: .5rem; }
.price-current { font-size: 1.25rem; font-weight: 800; color: var(--secondary); }
.price-original { font-size: .95rem; color: var(--gray-400); text-decoration: line-through; }
.price-lg { font-size: 2rem; }
.price-save { font-size: .85rem; color: var(--success); font-weight: 600; }
.product-card-action { padding: 0 1.25rem 1.25rem; }

/* ===== Features Grid ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  text-align: center;
  padding: 2rem;
}
.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--primary-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: var(--primary);
}
.feature-card h3 { font-size: 1.05rem; margin-bottom: .5rem; }
.feature-card p { font-size: .875rem; color: var(--gray-500); }

/* ===== Catalog ===== */
.catalog-layout { display: grid; grid-template-columns: 240px 1fr; gap: 2rem; }
.catalog-sidebar { position: sticky; top: 90px; align-self: start; }
.filter-group h3 { font-size: .9rem; font-weight: 700; margin-bottom: .75rem; text-transform: uppercase; letter-spacing: .5px; color: var(--gray-500); }
.filter-list li { margin-bottom: .25rem; }
.filter-list a { display: block; padding: .5rem .75rem; border-radius: var(--radius-sm); font-size: .9rem; color: var(--gray-600); }
.filter-list a:hover { background: var(--gray-100); }
.filter-list a.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.catalog-toolbar { display: flex; gap: 1rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.search-form { display: flex; gap: .5rem; flex: 1; min-width: 200px; }
.search-form .input { flex: 1; }
.sort-options .input { width: auto; min-width: 180px; }
.results-count { font-size: .85rem; color: var(--gray-500); margin-bottom: 1rem; }

/* ===== Product Detail ===== */
.breadcrumb { display: flex; gap: .5rem; font-size: .875rem; color: var(--gray-500); margin-bottom: 2rem; flex-wrap: wrap; }
.breadcrumb a { color: var(--gray-500); }
.breadcrumb a:hover { color: var(--primary); }
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.product-detail-image img { width: 100%; border-radius: var(--radius); }
.product-detail-info h1 { font-size: 1.75rem; font-weight: 800; margin-bottom: 1rem; }
.product-desc-lg { color: var(--gray-600); font-size: 1.05rem; margin-bottom: 1.5rem; }
.product-detail-meta { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.5rem; }
.meta-item { background: var(--gray-100); padding: .5rem 1rem; border-radius: 20px; font-size: .85rem; color: var(--gray-600); }
.product-detail-price { display: flex; align-items: baseline; gap: .75rem; margin-bottom: 1.5rem; }
.product-guarantees { margin-top: 1.5rem; display: flex; flex-direction: column; gap: .75rem; }
.guarantee { display: flex; align-items: center; gap: .5rem; font-size: .875rem; color: var(--gray-600); }
.product-long-desc { margin-bottom: 3rem; }
.product-long-desc h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1rem; }
.content-body { color: var(--gray-700); line-height: 1.8; }
.content-body h3 { margin-bottom: .75rem; font-size: 1.1rem; }
.content-body ul { list-style: disc; padding-left: 1.5rem; margin-bottom: 1rem; }
.content-body li { margin-bottom: .375rem; }
.related-products h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; }

/* ===== Cart ===== */
.cart-layout { display: grid; grid-template-columns: 1fr 380px; gap: 2rem; align-items: start; }
.cart-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--gray-200);
}
.cart-item-image { width: 80px; flex-shrink: 0; }
.cart-item-image img { width: 80px; height: 80px; object-fit: cover; border-radius: var(--radius-sm); }
.cart-item-info { flex: 1; }
.cart-item-info h3 { font-size: 1rem; margin-bottom: .25rem; }
.cart-item-info h3 a { color: var(--gray-800); }
.cart-item-price { font-weight: 700; font-size: 1.1rem; white-space: nowrap; }
.cart-summary {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: sticky;
  top: 90px;
}
.cart-summary h3 { margin-bottom: 1rem; }
.summary-row { display: flex; justify-content: space-between; padding: .75rem 0; font-size: .95rem; }
.summary-total { border-top: 2px solid var(--gray-300); font-size: 1.15rem; font-weight: 700; margin-bottom: 1rem; }
.cart-secure { text-align: center; font-size: .8rem; color: var(--gray-500); margin-top: .75rem; display: flex; align-items: center; justify-content: center; gap: .375rem; }

/* ===== Auth ===== */
.auth-container { max-width: 440px; margin: 3rem auto; }
.auth-container h1 { font-size: 2rem; margin-bottom: .5rem; }
.auth-container > p { color: var(--gray-500); margin-bottom: 2rem; }
.auth-form { margin-bottom: 1.5rem; }
.auth-switch { text-align: center; color: var(--gray-500); font-size: .9rem; }

/* ===== Account ===== */
.account-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; flex-wrap: wrap; gap: 1rem; }
.account-nav { display: flex; gap: .5rem; }

/* ===== Downloads ===== */
.downloads-grid { display: flex; flex-direction: column; gap: 1rem; }
.download-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem;
  background: var(--gray-50);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  gap: 1rem;
  flex-wrap: wrap;
}
.download-info h3 { font-size: 1rem; margin-bottom: .25rem; }
.download-meta { font-size: .8rem; color: var(--gray-500); display: flex; gap: 1rem; }

/* ===== Order Detail ===== */
.order-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.order-info-card, .order-items-card { background: var(--gray-50); border-radius: var(--radius); padding: 1.5rem; border: 1px solid var(--gray-200); }
.info-row { display: flex; justify-content: space-between; padding: .5rem 0; font-size: .95rem; }
.order-item { display: flex; justify-content: space-between; padding: .5rem 0; border-bottom: 1px solid var(--gray-200); font-size: .95rem; }
.order-item:last-child { border-bottom: none; }

/* ===== Success ===== */
.success-container { max-width: 600px; margin: 3rem auto; text-align: center; }
.success-icon { color: var(--success); margin-bottom: 1.5rem; }
.success-container h1 { font-size: 2rem; margin-bottom: .75rem; }
.success-subtitle { color: var(--gray-500); margin-bottom: 2rem; font-size: 1.05rem; }
.success-items { background: var(--gray-50); border-radius: var(--radius); padding: 1.5rem; margin-bottom: 2rem; text-align: left; }
.success-items h3 { margin-bottom: 1rem; font-size: 1rem; }
.success-item { display: flex; justify-content: space-between; padding: .5rem 0; }
.success-total { border-top: 2px solid var(--gray-300); margin-top: .5rem; padding-top: .75rem; }
.success-actions { display: flex; gap: 1rem; justify-content: center; }

/* ===== Admin ===== */
.admin-nav { display: flex; gap: .5rem; margin-bottom: 2rem; flex-wrap: wrap; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 3rem; }
.stat-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
}
.stat-value { font-size: 2rem; font-weight: 800; color: var(--primary); }
.stat-label { font-size: .85rem; color: var(--gray-500); margin-top: .25rem; }
.page-header-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.admin-form { max-width: 800px; }
.admin-form-inline { margin-bottom: 2rem; }
.admin-form-inline h3 { margin-bottom: .75rem; }
.form-row { display: flex; gap: .5rem; flex-wrap: wrap; align-items: end; }
.form-row .input { flex: 1; min-width: 120px; }

/* ===== Table ===== */
.table-responsive { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th {
  text-align: left;
  padding: .75rem 1rem;
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-600);
  white-space: nowrap;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.table td { padding: .75rem 1rem; border-bottom: 1px solid var(--gray-200); }

/* ===== Badge ===== */
.badge {
  display: inline-block;
  padding: .25rem .75rem;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 600;
}
.badge-success { background: #ecfdf5; color: #065f46; }
.badge-warning { background: #fffbeb; color: #92400e; }
.badge-danger { background: #fef2f2; color: #991b1b; }

/* ===== Empty State ===== */
.empty-state { text-align: center; padding: 4rem 1rem; color: var(--gray-500); }
.empty-state svg { margin-bottom: 1.5rem; }
.empty-state h3 { color: var(--gray-800); margin-bottom: .5rem; font-size: 1.25rem; }
.empty-state p { margin-bottom: 1.5rem; }

/* ===== Page Header ===== */
.page-header { margin-bottom: 2rem; }
.page-header h1 { font-size: 2rem; font-weight: 800; margin-bottom: .5rem; }
.page-header p { color: var(--gray-500); }

/* ===== Footer ===== */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 4rem 0 0;
  margin-top: 4rem;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 2.5rem; }
.footer-brand { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; }
.footer-brand .brand-text { color: #fff; font-weight: 800; font-size: 1.1rem; }
.footer-desc { font-size: .9rem; line-height: 1.6; }
.footer-col h4 { color: #fff; font-size: .9rem; font-weight: 700; margin-bottom: 1rem; text-transform: uppercase; letter-spacing: .5px; }
.footer-col ul li { margin-bottom: .5rem; }
.footer-col a { color: var(--gray-400); font-size: .9rem; }
.footer-col a:hover { color: #fff; }
.payment-icons { display: flex; gap: .5rem; margin-top: .75rem; }
.payment-badge {
  background: var(--gray-800);
  padding: .25rem .75rem;
  border-radius: 4px;
  font-size: .75rem;
  font-weight: 700;
  color: var(--gray-400);
}
.footer-bottom {
  text-align: center;
  padding: 1.5rem 0;
  margin-top: 3rem;
  border-top: 1px solid var(--gray-800);
  font-size: .85rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .hero { padding: 4rem 0; }
  .hero-stats { gap: 1.5rem; }
  .product-detail { grid-template-columns: 1fr; gap: 2rem; }
  .catalog-layout { grid-template-columns: 1fr; }
  .catalog-sidebar { position: static; }
  .filter-list { display: flex; flex-wrap: wrap; gap: .25rem; }
  .cart-layout { grid-template-columns: 1fr; }
  .order-detail-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .form-grid { grid-template-columns: 1fr; }
  .navbar-links { display: none; }
  .navbar-actions .btn { display: none; }
  .navbar-actions .cart-link { display: flex; }
  .navbar-toggle { display: flex; }
  .navbar-inner.open { flex-wrap: wrap; height: auto; padding-bottom: 1rem; }
  .navbar-inner.open .navbar-links { display: flex; width: 100%; flex-direction: column; gap: .5rem; }
  .navbar-inner.open .navbar-actions { width: 100%; justify-content: flex-start; }
  .navbar-inner.open .navbar-actions .btn { display: inline-flex; }
  .products-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
  .success-actions { flex-direction: column; }
}