/* ================================================================
   AI Bundle Store — Theme CSS
   Complete design system with dark/light theme support
   ================================================================ */

/* ========== CSS Custom Properties ========== */
:root {
  /* Dark theme (default) */
  --primary: #00c4ff;
  --primary-hover: #00a8e0;
  --accent: #ffdd57;
  --accent-hover: #ffd633;
  --bg: #0a0d12;
  --bg-secondary: #111827;
  --bg-tertiary: #1a1f2e;
  --surface: #151921;
  --surface-hover: #1c2130;
  --surface-border: rgba(255,255,255,0.08);
  --text: #f5f5f5;
  --text-secondary: #8a95a8;
  --text-muted: #5a6577;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
  --gradient: linear-gradient(135deg, #00c4ff 0%, #7c3aed 100%);
  --radius: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --danger: #ef4444;
  --success: #22c55e;
}

[data-theme="light"] {
  --primary: #0077cc;
  --primary-hover: #005fa3;
  --accent: #e6a800;
  --accent-hover: #cc9600;
  --bg: #f8f9fc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --surface: #ffffff;
  --surface-hover: #f8fafc;
  --surface-border: rgba(0,0,0,0.08);
  --text: #1a1a2e;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --gradient: linear-gradient(135deg, #0077cc 0%, #6d28d9 100%);
}

/* ========== Reset / Base ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  transition: background-color var(--transition), color var(--transition);
  padding-top: 64px;
  min-height: 100vh;
}

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

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

/* ========== Layout ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ========== Navbar / Top Bar ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 13, 18, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--surface-border);
  transition: background-color var(--transition), border-color var(--transition);
}

[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, 0.92);
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 0 20px;
  height: 64px;
  gap: 12px;
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-shrink: 0;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.navbar-logo:hover {
  transform: scale(1.03);
}

.navbar-logo img {
  height: 32px;
}

.navbar-logo span {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Search bar */
.navbar-search {
  flex: 1;
  max-width: 400px;
  position: relative;
}

.navbar-search input {
  width: 100%;
  padding: 9px 16px 9px 40px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-full);
  color: var(--text);
  font-family: inherit;
  font-size: 0.88rem;
  transition: border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.navbar-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 196, 255, 0.12);
}

.navbar-search input::placeholder {
  color: var(--text-muted);
}

.navbar-search .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 16px;
  height: 16px;
}

/* Nav links */
.navbar-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.navbar-links a {
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
  white-space: nowrap;
}

.navbar-links a:hover {
  color: var(--primary);
  background: rgba(0, 196, 255, 0.06);
}

.navbar-links a.active {
  color: var(--primary);
}

/* Theme toggle */
.theme-toggle {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-full);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--transition);
  flex-shrink: 0;
  color: var(--text);
  line-height: 1;
}

.theme-toggle:hover {
  border-color: var(--primary);
  background: rgba(0, 196, 255, 0.08);
}

/* Cart icon */
.cart-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.cart-link:hover {
  color: var(--primary);
  background: rgba(0, 196, 255, 0.06);
}

.cart-link svg {
  width: 20px;
  height: 20px;
}

.cart-badge {
  position: absolute;
  top: 2px;
  right: 4px;
  background: var(--accent);
  color: #000;
  font-size: 0.6rem;
  font-weight: 800;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.cart-badge.show {
  transform: scale(1);
}

/* User menu */
.user-menu {
  position: relative;
}

.user-menu-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
  background: none;
  color: var(--text);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
}

.user-menu-trigger:hover {
  background: var(--surface);
  border-color: var(--surface-border);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.82rem;
  color: #fff;
  flex-shrink: 0;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 8px;
  min-width: 200px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s ease;
  z-index: 1001;
}

.user-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown-header {
  padding: 12px;
  border-bottom: 1px solid var(--surface-border);
  margin-bottom: 4px;
}

.user-dropdown-header .name {
  font-weight: 600;
  font-size: 0.9rem;
}

.user-dropdown-header .email {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.user-dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.user-dropdown a:hover {
  background: rgba(0, 196, 255, 0.06);
  color: var(--text);
}

.user-dropdown a.danger {
  color: var(--danger);
}

.user-dropdown a.danger:hover {
  background: rgba(239, 68, 68, 0.08);
}

.login-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  background: var(--gradient);
  transition: all var(--transition);
  white-space: nowrap;
}

.login-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 196, 255, 0.3);
}

/* Mobile hamburger */
.nav-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  display: none;
  padding: 8px;
  z-index: 1001;
  color: var(--text);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

.nav-toggle svg line {
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  transition: all 0.3s ease;
  transform-origin: center;
}

.nav-toggle.active svg line:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle.active svg line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active svg line:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

/* ========== Hero Section ========== */
.hero-slim {
  text-align: center;
  padding: 48px 20px 32px;
}

.hero-slim h1 {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 900;
  letter-spacing: -1px;
  margin-bottom: 12px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

.hero-slim p {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ========== Category Pills ========== */
.category-pills {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 20px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.category-pills::-webkit-scrollbar {
  display: none;
}

.pill {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all var(--transition);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--text-secondary);
  cursor: pointer;
  flex-shrink: 0;
}

.pill:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.pill.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

[data-theme="light"] .pill.active {
  color: #fff;
}

/* ========== Sort Bar ========== */
.sort-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 0 4px;
}

.sort-bar span {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.sort-bar select {
  padding: 8px 32px 8px 14px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a95a8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color var(--transition);
  outline: none;
}

.sort-bar select:focus {
  border-color: var(--primary);
}

/* ========== Product Grid ========== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 196, 255, 0.2);
  box-shadow: var(--shadow-lg);
}

.product-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
  transform: scale(1.06);
}

.product-info {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-info h3 a {
  transition: color var(--transition);
}

.product-info h3 a:hover {
  color: var(--primary);
}

.product-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.5;
}

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

/* ========== Badge ========== */
.badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 2;
}

[data-theme="light"] .badge {
  background: rgba(0, 0, 0, 0.7);
}

/* ========== Price Display ========== */
.price-group {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.price {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent);
}

[data-theme="light"] .price {
  color: var(--accent);
}

.compare-price {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: line-through;
}

/* ========== Star Ratings ========== */
.stars {
  display: flex;
  gap: 2px;
}

.stars .star {
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  transition: color 0.2s;
}

.stars .star.filled {
  color: var(--accent);
}

.stars .star:hover,
.stars .star:hover ~ .star {
  color: var(--accent);
}

.stars-display .star {
  cursor: default;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.92rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  font-family: inherit;
  line-height: 1;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 196, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 196, 255, 0.3);
}

.btn-secondary {
  background: var(--accent);
  color: #000;
  box-shadow: 0 4px 16px rgba(255, 221, 87, 0.2);
}

.btn-secondary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 221, 87, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--surface-border);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-google {
  width: 100%;
  padding: 12px;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  color: #333;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background 0.15s;
  font-family: inherit;
}

.btn-google:hover {
  background: #f5f5f5;
}

.btn-google svg {
  width: 20px;
  height: 20px;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.82rem;
}

.btn-block {
  width: 100%;
}

.btn-add-cart {
  padding: 8px 18px;
  font-size: 0.82rem;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  background: var(--gradient);
  color: #fff;
  transition: all var(--transition);
}

.btn-add-cart:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 196, 255, 0.3);
}

/* ========== Forms ========== */
.form-group {
  margin-bottom: 20px;
  text-align: left;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 196, 255, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-select option {
  background: var(--surface);
  color: var(--text);
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-row .form-group {
  flex: 1;
}

/* ========== Cart Page ========== */
.cart-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 32px;
  animation: fadeInUp 0.5s ease both;
}

.cart-items-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cart-item {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  align-items: center;
  transition: border-color var(--transition);
}

.cart-item:hover {
  border-color: rgba(0, 196, 255, 0.15);
}

.cart-item-image {
  width: 80px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--radius);
  flex-shrink: 0;
}

.cart-item-info {
  flex: 1;
  min-width: 0;
}

.cart-item-title {
  font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cart-item-price {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.95rem;
}

.cart-item-remove {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 8px;
  border-radius: var(--radius);
  transition: all 0.2s;
  flex-shrink: 0;
}

.cart-item-remove:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.08);
}

.cart-summary {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: sticky;
  top: 88px;
}

.cart-summary h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.cart-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--surface-border);
}

.cart-total-amount {
  color: var(--accent);
}

/* ========== Auth Pages ========== */
.auth-container {
  width: 100%;
  max-width: 420px;
  padding: 20px;
  margin: 0 auto;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}

.auth-card h1 {
  text-align: center;
  font-size: 1.8rem;
  margin: 0 0 8px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-card .subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 0.9rem;
}

.divider {
  display: flex;
  align-items: center;
  margin: 24px 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--surface-border);
}

.divider span {
  padding: 0 12px;
}

.auth-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--primary);
}

.auth-footer a:hover {
  text-decoration: underline;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--surface-border);
  padding: 40px 20px;
  text-align: center;
  transition: background-color var(--transition), border-color var(--transition);
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-bottom: 16px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ========== Testimonial Cards ========== */
.testimonials-section {
  margin-top: 64px;
  padding: 48px 0;
}

.testimonials-section h2 {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 32px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.testimonial-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
  text-align: left;
}

.testimonial-card:hover {
  border-color: rgba(0, 196, 255, 0.15);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 1rem;
  margin-bottom: 16px;
  flex-shrink: 0;
}

.testimonial-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 12px;
  font-style: italic;
}

.testimonial-card strong {
  font-size: 0.88rem;
  color: var(--text);
}

/* ========== Review Cards ========== */
.review-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: left;
  margin-bottom: 16px;
  transition: border-color var(--transition);
}

.review-card:hover {
  border-color: rgba(0, 196, 255, 0.12);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 2px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary);
  font-size: 1rem;
  flex-shrink: 0;
}

.review-name {
  font-weight: 600;
}

.review-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.review-comment {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ========== Alert Messages ========== */
.alert {
  padding: 14px 20px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 0.9rem;
  border: 1px solid;
}

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.3);
  color: var(--success);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--danger);
}

.alert-info {
  background: rgba(0, 196, 255, 0.1);
  border-color: rgba(0, 196, 255, 0.3);
  color: var(--primary);
}

/* ========== Page Header ========== */
.page-header {
  padding: 40px 0 20px;
  text-align: center;
  animation: fadeInUp 0.6s ease both;
}

.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ========== Empty State ========== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 1.1rem;
  margin-bottom: 20px;
}

/* ========== Product Detail ========== */
.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.product-detail-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.product-detail-image img {
  width: 100%;
  border-radius: var(--radius-lg);
}

.product-detail-info h1 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 900;
  margin-bottom: 12px;
}

.product-detail-price {
  margin-bottom: 20px;
}

.product-detail-price .price {
  font-size: 2rem;
}

.product-detail-price .compare-price {
  font-size: 1.1rem;
}

.product-detail-desc {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 28px;
  white-space: pre-line;
}

/* ========== Toast Notifications ========== */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 14px 24px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  pointer-events: all;
  animation: toastSlideIn 0.35s ease forwards;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 360px;
}

.toast.toast-success {
  border-left: 3px solid var(--success);
}

.toast.toast-error {
  border-left: 3px solid var(--danger);
}

.toast.toast-info {
  border-left: 3px solid var(--primary);
}

.toast.toast-exit {
  animation: toastSlideOut 0.3s ease forwards;
}

@keyframes toastSlideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toastSlideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* ========== Skeleton Loader ========== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--surface) 25%,
    var(--surface-hover) 50%,
    var(--surface) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}

.skeleton-text {
  height: 14px;
  margin-bottom: 8px;
  border-radius: 4px;
}

.skeleton-text.short {
  width: 60%;
}

.skeleton-image {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ========== Animations ========== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideIn {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes staggerFadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== Scroll Animations ========== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Mobile Nav Overlay ========== */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 13, 18, 0.97);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  z-index: 999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 80px 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

[data-theme="light"] .mobile-nav-overlay {
  background: rgba(248, 249, 252, 0.97);
}

.mobile-nav-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-overlay a {
  font-size: 1.2rem;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius);
  text-align: center;
  width: 100%;
  max-width: 300px;
  color: var(--text);
  transition: all var(--transition);
}

.mobile-nav-overlay a:hover {
  background: rgba(0, 196, 255, 0.08);
  color: var(--primary);
}

.mobile-nav-overlay a.active {
  color: var(--primary);
}

/* ========== Popup / Modal ========== */
.popup-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1100;
}

.popup-overlay.active {
  display: flex;
  justify-content: center;
  align-items: center;
}

.popup-box {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  text-align: center;
  width: 90%;
  max-width: 380px;
  animation: popupScale 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes popupScale {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* ========== Email Quick Signup Popup ========== */
#email-popup-overlay {
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  animation: fadeIn 0.2s ease;
}

#email-popup-overlay.popup-closing {
  animation: fadeOut 0.3s ease forwards;
}

@keyframes fadeOut {
  to { opacity: 0; }
}

.popup-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  width: 90%;
  max-width: 400px;
  text-align: center;
  position: relative;
  animation: popupScale 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  box-shadow: var(--shadow-lg);
}

.popup-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}

.popup-close:hover { color: var(--text); }

.popup-icon { font-size: 2.5rem; margin-bottom: 8px; }

.popup-card h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 4px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.popup-card > p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 20px;
}

.popup-card form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.popup-card form input[type="email"] {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--surface-border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.popup-card form input[type="email"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 196, 255, 0.12);
}

.popup-card form .btn-primary {
  padding: 12px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius);
  width: 100%;
}

.popup-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.popup-divider::before,
.popup-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--surface-border);
}

.btn-google-mini {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 11px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--surface-border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  box-sizing: border-box;
}

.btn-google-mini:hover {
  background: var(--surface-hover);
  border-color: var(--text-muted);
}

.popup-footer {
  margin-top: 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

::selection {
  background: var(--primary);
  color: #fff;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .navbar-search {
    max-width: 280px;
  }

  .product-detail-grid {
    gap: 28px;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex !important;
    order: 10;
  }

  .navbar-links,
  .navbar-search,
  .login-link,
  .user-menu,
  .user-name-text {
    display: none !important;
  }

  .navbar-inner {
    padding: 0 12px;
  }

  .navbar-right {
    gap: 2px;
  }

  .theme-toggle {
    width: 34px;
    height: 34px;
  }

  .cart-link {
    padding: 6px 8px;
  }

  .container {
    padding: 20px 16px 80px;
  }

  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }

  .product-detail-grid {
    grid-template-columns: 1fr;
  }

  .cart-layout {
    grid-template-columns: 1fr;
  }

  .form-row {
    flex-direction: column;
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-slim {
    padding: 32px 16px 20px;
  }

  #toast-container {
    right: 12px;
    bottom: 12px;
    left: 12px;
  }

  .toast {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: 1fr;
  }

  .cart-item {
    flex-direction: column;
    text-align: center;
  }

  .cart-item-image {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }

  .sort-bar {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }

  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .footer-links {
    flex-direction: column;
    gap: 12px;
  }
}

/* ========== Product Detail Enhanced ========== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 24px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s;
}
.back-link:hover { color: var(--primary); }

.product-save-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: #ef4444;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

.product-detail-image { position: relative; }

.product-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 20px 0;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.btn-add-cart-big {
  font-size: 1.1rem;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.trust-badges {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--surface-border);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Product Sections */
.product-sections { margin-top: 48px; }

.product-section {
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--surface-border);
}
.product-section:last-child { border-bottom: none; }

.section-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-title svg { flex-shrink: 0; }

/* What's Included */
.included-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.included-item {
  display: flex;
  gap: 12px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  transition: transform 0.2s, box-shadow 0.2s;
}
.included-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.included-icon { font-size: 1.5rem; flex-shrink: 0; }
.included-item strong { display: block; margin-bottom: 4px; font-size: 0.95rem; }
.included-item p { font-size: 0.82rem; color: var(--text-secondary); margin: 0; }

/* Benefits */
.benefits-list { display: flex; flex-direction: column; gap: 12px; }

.benefit-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 500;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
}

.benefit-check { font-size: 1.1rem; }

/* Audience Grid */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.audience-card {
  text-align: center;
  padding: 20px 12px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  transition: transform 0.2s, box-shadow 0.2s;
}
.audience-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.audience-card span { font-size: 2rem; display: block; margin-bottom: 8px; }
.audience-card strong { display: block; font-size: 0.9rem; margin-bottom: 4px; }
.audience-card p { font-size: 0.78rem; color: var(--text-secondary); margin: 0; }

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.step-card {
  text-align: center;
  padding: 24px 16px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  margin: 0 auto 12px;
}

.step-card strong { display: block; margin-bottom: 8px; }
.step-card p { font-size: 0.85rem; color: var(--text-secondary); margin: 0; }

/* Delivery Info */
.delivery-info-box {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.delivery-info-box h3 { margin-bottom: 16px; font-size: 1.1rem; }
.delivery-info-box ul { list-style: none; padding: 0; margin: 0; }
.delivery-info-box li { padding: 8px 0; border-bottom: 1px solid var(--surface-border); font-size: 0.92rem; color: var(--text-secondary); }
.delivery-info-box li:last-child { border-bottom: none; }
.delivery-info-box li strong { color: var(--text); }
.delivery-info-box a { color: var(--primary); }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 8px; }

.faq-item {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.2s;
}
.faq-item:hover { border-color: var(--primary); }

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  font-weight: 600;
  font-size: 0.95rem;
}
.faq-question svg {
  transition: transform 0.3s;
  flex-shrink: 0;
  color: var(--text-muted);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  transition: max-height 0.3s, padding 0.3s;
}

.faq-item.open .faq-question svg { transform: rotate(180deg); }
.faq-item.open .faq-answer { max-height: 200px; padding: 0 20px 16px; }

/* Product Full Description */
.product-full-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  white-space: pre-line;
}

/* Sticky CTA (mobile) */
.sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: 1px solid var(--surface-border);
  padding: 12px 16px;
  z-index: 999;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.sticky-cta-price { display: flex; align-items: center; gap: 8px; }
.sticky-cta .btn { padding: 10px 24px; font-size: 0.95rem; }

@media (max-width: 768px) {
  .sticky-cta { display: flex; }
  body:has(.sticky-cta) .container { padding-bottom: 80px; }
  body:has(.sticky-cta) .site-footer { padding-bottom: 80px; }
  .included-grid { grid-template-columns: 1fr; }
  .audience-grid { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .product-highlights { grid-template-columns: 1fr; }
  .trust-badges { flex-wrap: wrap; gap: 12px; }
}

@media (max-width: 480px) {
  .audience-grid { grid-template-columns: 1fr; }
}

/* ========== Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}