/* ============================================================
   PriceWatch — Main CSS Design System
   Flat Design | Inter Font | Electric Blue
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ─── CSS Custom Properties ─────────────────────────────── */
:root {
  --primary:       #2563EB;
  --primary-dark:  #1D4ED8;
  --primary-light: #EFF6FF;
  --success:       #16A34A;
  --success-light: #F0FDF4;
  --danger:        #DC2626;
  --danger-light:  #FEF2F2;
  --warning:       #D97706;
  --warning-light: #FFFBEB;
  --info:          #0891B2;
  --info-light:    #ECFEFF;

  --bg:            #F8FAFC;
  --surface:       #FFFFFF;
  --surface-2:     #F1F5F9;
  --border:        #E2E8F0;
  --border-2:      #CBD5E1;

  --text:          #1E293B;
  --text-2:        #475569;
  --text-muted:    #94A3B8;
  --text-inv:      #FFFFFF;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow:    0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 150ms ease;
  --nav-h: 64px;
}

/* ─── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
button { cursor: pointer; font-family: var(--font); }
input, select, textarea { font-family: var(--font); }
ul { list-style: none; }

/* ─── Navbar ─────────────────────────────────────────────── */
.navbar {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.navbar-inner {
  max-width: 1280px; margin: 0 auto; padding: 0 16px;
  height: 100%; display: flex; align-items: center; gap: 14px;
}
.navbar-brand {
  display: flex; align-items: center; gap: 8px;
  font-size: 19px; font-weight: 800; color: var(--text);
  white-space: nowrap; flex-shrink: 0;
}
.navbar-brand .logo-icon {
  width: 34px; height: 34px;
  background: var(--primary);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 17px;
}
.navbar-brand span { color: var(--primary); }
.navbar-search {
  flex: 1 1 220px;
  min-width: 180px;
  max-width: 380px;
  position: relative;
  flex-shrink: 0;
}
.navbar-search input {
  width: 100%; height: 38px;
  padding: 0 38px 0 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg);
  font-size: 13px; color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.navbar-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.navbar-search .search-icon {
  position: absolute; right: 13px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted); pointer-events: none;
}
.navbar-nav { 
  display: flex; align-items: center; gap: 4px; margin-left: auto;
  flex-shrink: 1; min-width: 0;
}
.navbar-link {
  padding: 6px 10px; border-radius: var(--radius);
  font-size: 13px; font-weight: 600; color: var(--text-2);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}
.navbar-link:hover { background: var(--bg); color: var(--text); }
.navbar-link.active { background: var(--primary-light); color: var(--primary); }
.btn-nav-login {
  padding: 7px 16px;
  background: var(--primary); color: #fff;
  border: none; border-radius: var(--radius);
  font-size: 13px; font-weight: 600;
  white-space: nowrap; flex-shrink: 0;
  transition: background var(--transition);
}
.btn-nav-login:hover { background: var(--primary-dark); }

/* ─── Layout ─────────────────────────────────────────────── */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 680px; margin: 0 auto; padding: 0 24px; }
.page-section { padding: 48px 0; }
.page-section-lg { padding: 80px 0; }

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius);
  font-size: 14px; font-weight: 600; border: none;
  transition: all var(--transition); cursor: pointer;
  white-space: nowrap; text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803D; color: #fff; }
.btn-danger  { background: var(--danger);  color: #fff; }
.btn-outline {
  background: transparent; color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: var(--primary-light); }
.btn-ghost {
  background: transparent; color: var(--text-2);
}
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ─── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.card-body { padding: 20px; }
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-weight: 600; font-size: 15px;
}
.card-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

/* ─── Product Card ───────────────────────────────────────── */
.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
}
.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.product-card-img {
  aspect-ratio: 1; overflow: hidden;
  background: var(--surface-2);
  display: flex; align-items: center; justify-content: center;
}
.product-card-img img {
  width: 100%; height: 100%; object-fit: contain;
  padding: 12px;
  transition: transform 300ms ease;
}
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-body { padding: 14px; }
.product-card-name {
  font-size: 13px; font-weight: 500; color: var(--text);
  line-height: 1.4; display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 8px;
}
.product-card-prices { display: flex; align-items: baseline; gap: 8px; }
.price-current {
  font-size: 18px; font-weight: 700; color: var(--text);
}
.price-original {
  font-size: 13px; color: var(--text-muted);
  text-decoration: line-through;
}
.price-drop-badge {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: var(--radius-full);
  background: var(--success-light); color: var(--success);
  font-size: 12px; font-weight: 600;
}
.price-rise-badge {
  background: var(--danger-light); color: var(--danger);
}
.store-count-badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; color: var(--text-muted); margin-top: 6px;
}
.watchlist-btn {
  position: absolute; top: 10px; right: 10px;
  width: 32px; height: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; transition: all var(--transition);
}
.watchlist-btn:hover, .watchlist-btn.active {
  background: var(--danger-light);
  border-color: var(--danger); color: var(--danger);
}
.product-card-wrapper { position: relative; }

/* ─── Store Comparison Table ─────────────────────────────── */
.compare-table { width: 100%; border-collapse: collapse; }
.compare-table th {
  padding: 12px 16px; text-align: left;
  font-size: 12px; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.compare-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:hover td { background: var(--bg); }
.compare-table .best-price td { background: var(--success-light) !important; }
.store-logo { display: flex; align-items: center; gap: 10px; }
.store-logo img { width: 20px; height: 20px; object-fit: contain; }
.store-logo span { font-weight: 500; font-size: 14px; }
.compare-price {
  font-size: 16px; font-weight: 700; color: var(--text);
}
.compare-price.lowest { color: var(--success); }
.compare-price.highest { color: var(--danger); }
.in-stock-badge { color: var(--success); font-size: 13px; font-weight: 500; }
.out-stock-badge { color: var(--text-muted); font-size: 13px; }
.btn-buy-now {
  padding: 8px 16px;
  background: var(--primary); color: #fff;
  border: none; border-radius: var(--radius);
  font-size: 13px; font-weight: 700;
  transition: background var(--transition);
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  white-space: nowrap !important;
  min-width: 100px;
  text-decoration: none !important;
}
.btn-buy-now:hover { background: var(--primary-dark); }
.compare-table td:last-child {
  white-space: nowrap !important;
  width: 125px;
  text-align: right;
}

/* ─── Price History Chart Container ─────────────────────── */
.chart-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.chart-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px;
}
.chart-title { font-size: 16px; font-weight: 700; }
.chart-period-tabs {
  display: flex; gap: 4px;
  background: var(--bg);
  padding: 3px; border-radius: var(--radius);
}
.chart-period-tab {
  padding: 5px 12px; border-radius: 5px;
  font-size: 13px; font-weight: 500; color: var(--text-2);
  border: none; background: transparent; cursor: pointer;
  transition: all var(--transition);
}
.chart-period-tab.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
.chart-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; margin-bottom: 20px;
}
.chart-stat {
  text-align: center; padding: 12px;
  background: var(--bg); border-radius: var(--radius);
}
.chart-stat-label {
  font-size: 11px; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .05em; margin-bottom: 4px;
}
.chart-stat-value { font-size: 18px; font-weight: 700; }
.chart-stat-value.low  { color: var(--success); }
.chart-stat-value.high { color: var(--danger); }

/* ─── Price Alert Widget ─────────────────────────────────── */
.alert-widget {
  background: linear-gradient(135deg, var(--primary-light), #fff);
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 20px;
}
.alert-widget-title {
  font-size: 15px; font-weight: 700; color: var(--primary);
  display: flex; align-items: center; gap: 8px; margin-bottom: 12px;
}
.alert-input-row {
  display: flex; gap: 8px;
}
.alert-input-row input {
  flex: 1; height: 40px; padding: 0 12px;
  border: 1.5px solid var(--border); border-radius: var(--radius);
  font-size: 14px; outline: none;
  transition: border-color var(--transition);
}
.alert-input-row input:focus { border-color: var(--primary); }

/* ─── Hero Section ───────────────────────────────────────── */
.hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 64px 0 48px;
  text-align: center;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--radius-full);
  background: var(--primary-light); color: var(--primary);
  font-size: 13px; font-weight: 600; margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 800; line-height: 1.15; color: var(--text);
  max-width: 720px; margin: 0 auto 16px;
}
.hero h1 span { color: var(--primary); }
.hero-sub {
  font-size: 18px; color: var(--text-2);
  max-width: 540px; margin: 0 auto 36px;
}
.hero-search {
  max-width: 600px; margin: 0 auto 32px;
  display: flex; gap: 0;
  border: 2px solid var(--primary);
  border-radius: var(--radius-full);
  overflow: hidden;
  box-shadow: 0 0 0 4px rgba(37,99,235,.1);
}
.hero-search input {
  flex: 1; height: 52px; padding: 0 20px;
  font-size: 16px; border: none; outline: none;
  color: var(--text);
}
.hero-search button {
  height: 52px; padding: 0 28px;
  background: var(--primary); color: #fff;
  border: none; font-size: 15px; font-weight: 600;
  cursor: pointer; transition: background var(--transition);
  white-space: nowrap;
}
.hero-search button:hover { background: var(--primary-dark); }
.hero-stats {
  display: flex; justify-content: center; gap: 40px; flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-size: 24px; font-weight: 800; color: var(--primary);
}
.hero-stat-label { font-size: 13px; color: var(--text-muted); }

/* ─── Category Pills ─────────────────────────────────────── */
.category-pills {
  display: flex; gap: 8px; flex-wrap: wrap; padding: 20px 0;
  overflow-x: auto;
}
.category-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius-full);
  font-size: 13px; font-weight: 500; color: var(--text-2);
  background: var(--surface); border: 1px solid var(--border);
  white-space: nowrap; cursor: pointer;
  transition: all var(--transition);
}
.category-pill:hover, .category-pill.active {
  background: var(--primary); color: #fff; border-color: var(--primary);
}

/* ─── Deals Grid ─────────────────────────────────────────── */
.deals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

/* ─── Section Header ─────────────────────────────────────── */
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
}
.section-title {
  font-size: 20px; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: 8px;
}
.section-link {
  font-size: 13px; font-weight: 600; color: var(--primary);
}

/* ─── Forms ──────────────────────────────────────────────── */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--text); margin-bottom: 6px;
}
.form-input {
  width: 100%; height: 44px; padding: 0 14px;
  border: 1.5px solid var(--border); border-radius: var(--radius);
  font-size: 14px; color: var(--text); background: var(--surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.form-hint { font-size: 12px; color: var(--text-muted); margin-top: 5px; }
.form-error { font-size: 12px; color: var(--danger); margin-top: 5px; }

/* ─── OTP Input ──────────────────────────────────────────── */
.otp-inputs {
  display: flex; gap: 10px; justify-content: center;
}
.otp-input {
  width: 52px; height: 60px;
  text-align: center; font-size: 24px; font-weight: 700;
  border: 2px solid var(--border); border-radius: var(--radius);
  outline: none; transition: border-color var(--transition);
}
.otp-input:focus { border-color: var(--primary); }
.otp-input.filled { border-color: var(--primary); background: var(--primary-light); }

/* ─── Badges ─────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: var(--radius-full);
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .04em;
}
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-danger  { background: var(--danger-light);  color: var(--danger); }
.badge-warning { background: var(--warning-light); color: var(--warning); }

/* ─── Toast Notifications ────────────────────────────────── */
.toast-container {
  position: fixed; bottom: 24px; right: 24px;
  z-index: 9999; display: flex; flex-direction: column; gap: 8px;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 18px; border-radius: var(--radius);
  background: var(--text); color: #fff;
  box-shadow: var(--shadow-lg);
  font-size: 14px; font-weight: 500;
  animation: slideInRight 200ms ease;
  max-width: 340px;
}
.toast.success { background: var(--success); }
.toast.danger  { background: var(--danger); }
.toast.warning { background: var(--warning); }
@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* ─── Loading Spinner ────────────────────────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2.5px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
  display: inline-block;
}
.spinner-lg { width: 40px; height: 40px; border-width: 3px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Skeleton Loader ────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--border) 25%, var(--surface-2) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
  border-radius: var(--radius);
}
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }
.skeleton-card { height: 280px; border-radius: var(--radius-lg); }
.skeleton-text { height: 16px; margin-bottom: 8px; }
.skeleton-text.sm { height: 12px; width: 60%; }

/* ─── Extension Download Section ────────────────────────── */
.ext-cta {
  background: var(--primary);
  border-radius: var(--radius-xl);
  padding: 40px; color: #fff;
  display: flex; align-items: center; gap: 32px;
}
.ext-cta h3 { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
.ext-cta p  { opacity: .85; margin-bottom: 20px; }
.btn-ext {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 24px;
  background: #fff; color: var(--primary);
  border-radius: var(--radius); font-weight: 700; font-size: 15px;
  transition: all var(--transition);
}
.btn-ext:hover { background: var(--primary-light); color: var(--primary); transform: translateY(-1px); }

/* ─── Dashboard ──────────────────────────────────────────── */
.dashboard-grid {
  display: grid; grid-template-columns: 260px 1fr; gap: 24px;
  align-items: start;
}
.sidebar {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden; position: sticky; top: 80px;
}
.sidebar-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 18px; font-size: 14px; font-weight: 500; color: var(--text-2);
  border-left: 3px solid transparent;
  transition: all var(--transition); cursor: pointer;
}
.sidebar-item:hover { background: var(--bg); color: var(--text); }
.sidebar-item.active {
  background: var(--primary-light); color: var(--primary);
  border-left-color: var(--primary);
}
.sidebar-icon { font-size: 18px; width: 24px; text-align: center; }

/* ─── Stats Row ──────────────────────────────────────────── */
.stats-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px; margin-bottom: 24px;
}
.stat-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
  text-align: center;
}
.stat-card-icon { font-size: 28px; margin-bottom: 8px; }
.stat-card-num { font-size: 28px; font-weight: 800; color: var(--text); }
.stat-card-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .dashboard-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .hero h1 { font-size: 28px; }
  .hero-search { border-radius: var(--radius); flex-direction: column; }
  .hero-search input { border-radius: var(--radius) var(--radius) 0 0; }
  .hero-search button { border-radius: 0 0 var(--radius) var(--radius); width: 100%; }
  .chart-stats { grid-template-columns: 1fr; }
  .ext-cta { flex-direction: column; padding: 24px; }
  .navbar-search { display: none; }
  .deals-grid { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 0 16px; }
}
@media (max-width: 480px) {
  .deals-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
}

/* ─── Footer ─────────────────────────────────────────────── */
footer {
  background: var(--text); color: rgba(255,255,255,.7);
  padding: 48px 0 24px;
  margin-top: 80px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 40px;
}
.footer-brand { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.footer-brand span { color: var(--primary); }
.footer-desc { font-size: 14px; line-height: 1.7; }
.footer-heading {
  font-size: 13px; font-weight: 700; color: #fff;
  text-transform: uppercase; letter-spacing: .07em; margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-link {
  font-size: 14px; color: rgba(255,255,255,.6);
  transition: color var(--transition);
}
.footer-link:hover { color: #fff; }
.footer-bottom {
  padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1);
  display: flex; align-items: center; justify-content: space-between;
  font-size: 13px;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

/* ─── Utility ────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-muted  { color: var(--text-muted); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.font-bold    { font-weight: 700; }
.font-semibold { font-weight: 600; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.gap-8  { gap: 8px; }
.gap-16 { gap: 16px; }
.flex-1 { flex: 1; }
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* ─── AI Assistant Banner (Exact Match to User Reference) ── */
.ai-banner-section {
  position: relative;
  background: radial-gradient(circle at 50% 30%, #171B48 0%, #0D1033 60%, #080A21 100%);
  color: #FFFFFF;
  padding: 48px 24px 56px;
  overflow: hidden;
  border-bottom: 1px solid rgba(99, 102, 241, 0.2);
}

.ai-banner-rings {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 900px;
  height: 900px;
  pointer-events: none;
  background:
    radial-gradient(circle, transparent 40%, rgba(99, 102, 241, 0.08) 41%, transparent 42%),
    radial-gradient(circle, transparent 55%, rgba(99, 102, 241, 0.05) 56%, transparent 57%),
    radial-gradient(circle, transparent 70%, rgba(99, 102, 241, 0.03) 71%, transparent 72%);
}

.ai-banner-content {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.ai-banner-title {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #FFFFFF;
  margin-bottom: 12px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.ai-banner-sub {
  font-size: 15px;
  color: #94A3B8;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.browser-icons-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.06);
  padding: 4px 12px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.browser-icon {
  width: 20px;
  height: 20px;
  transition: transform 150ms;
}
.browser-icon:hover {
  transform: scale(1.15);
}

.ai-cards-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  max-width: 980px;
  margin: 0 auto;
}

.ai-card-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #1E2B7A 0%, #18205C 100%);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: 16px;
  padding: 20px 12px 16px;
  text-decoration: none;
  color: #FFFFFF;
  transition: all 200ms cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.ai-card-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(129, 140, 248, 0.8), transparent);
  opacity: 0;
  transition: opacity 200ms;
}

.ai-card-item:hover {
  transform: translateY(-6px);
  background: linear-gradient(180deg, #2538A0 0%, #1F2A75 100%);
  border-color: #818CF8;
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.4);
  color: #FFFFFF;
}

.ai-card-item:hover::before {
  opacity: 1;
}

.ai-card-icon-wrap {
  width: 54px;
  height: 54px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 200ms;
}

.ai-card-item:hover .ai-card-icon-wrap {
  transform: scale(1.1);
}

.ai-card-label {
  font-size: 13px;
  font-weight: 700;
  color: #F1F5F9;
  line-height: 1.25;
  text-align: center;
}

@media (max-width: 900px) {
  .ai-cards-row {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 540px) {
  .ai-cards-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .ai-banner-title {
    font-size: 26px;
  }
}

/* ─── Floating AI Assistant Widget ────────────────────────── */
.ai-assistant-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  background: linear-gradient(135deg, #2563EB 0%, #4F46E5 100%);
  color: #FFFFFF;
  border: none;
  border-radius: 9999px;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.4);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 200ms;
}
.ai-assistant-fab:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 15px 32px rgba(37, 99, 235, 0.55);
}

.ai-assistant-drawer {
  position: fixed;
  bottom: 80px;
  right: 24px;
  width: 380px;
  max-width: calc(100vw - 32px);
  height: 520px;
  max-height: calc(100vh - 120px);
  background: #FFFFFF;
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  overflow: hidden;
  transition: all 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ai-assistant-drawer.collapsed {
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px) scale(0.95);
}

.ai-drawer-header {
  background: linear-gradient(135deg, #0B0F2E, #16194F);
  color: #FFFFFF;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ai-drawer-body {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #F8FAFC;
  font-size: 14px;
}

.ai-msg {
  max-width: 88%;
  padding: 10px 14px;
  border-radius: 12px;
  line-height: 1.45;
}
.ai-msg-bot {
  background: #FFFFFF;
  border: 1px solid var(--border);
  color: var(--text);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}
.ai-msg-user {
  background: #2563EB;
  color: #FFFFFF;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.ai-drawer-input {
  padding: 12px 16px;
  background: #FFFFFF;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}
.ai-drawer-input input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 9999px;
  padding: 8px 14px;
  font-size: 13px;
  outline: none;
}
.ai-drawer-input button {
  background: #2563EB;
  color: #FFFFFF;
  border: none;
  border-radius: 9999px;
  padding: 8px 16px;
  font-weight: 600;
  cursor: pointer;
}

/* Mobile Bottom Navigation - Hidden by default on Desktop */
.mobile-bottom-nav {
  display: none !important;
}

/* ─── Advanced Responsive Enhancements (Mobile & Tablet) ── */
@media (max-width: 992px) {
  .product-layout-grid {
    grid-template-columns: 1fr !important;
  }
  .lookalike-grid-row {
    grid-template-columns: 1fr !important;
  }
}

@media (max-width: 768px) {
  .navbar-inner {
    padding: 0 16px;
    gap: 12px;
  }
  .navbar-nav {
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    max-width: 60%;
    padding-bottom: 2px;
  }
  .navbar-nav::-webkit-scrollbar {
    display: none;
  }
  .navbar-link {
    font-size: 13px;
    padding: 6px 10px;
  }
  .btn-nav-login {
    font-size: 13px;
    padding: 6px 12px;
  }
  .hero {
    padding: 40px 0 32px;
  }
  .hero h1 {
    font-size: 28px;
    line-height: 1.25;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .category-pills {
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    justify-content: flex-start;
    padding: 4px 0 8px;
  }
  .category-pills::-webkit-scrollbar {
    display: none;
  }
  .deals-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 12px;
  }
  .product-card-body {
    padding: 12px;
  }
  .product-card-name {
    font-size: 13px;
    height: 36px;
  }
  .price-current {
    font-size: 16px;
  }
  /* Mobile Bottom Navigation */
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: #FFFFFF;
    border-top: 1px solid var(--border);
    z-index: 990;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    align-items: center;
    justify-content: space-around;
    padding-bottom: env(safe-area-inset-bottom);
  }
  .mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-2);
    font-size: 11px;
    font-weight: 600;
    gap: 2px;
    flex: 1;
  }
  .mobile-nav-item.active {
    color: var(--primary);
  }
  .mobile-nav-item svg {
    width: 20px;
    height: 20px;
  }
  body {
    padding-bottom: 70px;
  }
  .ai-assistant-fab {
    bottom: 76px;
    right: 16px;
    padding: 10px 16px;
    font-size: 13px;
  }
  .ai-assistant-drawer {
    left: 12px;
    right: 12px;
    width: auto;
    max-width: none;
    bottom: 76px;
    height: 70vh;
  }
}

@media (min-width: 769px) {
  .mobile-bottom-nav {
    display: none !important;
  }
}

@media (max-width: 480px) {
  .deals-grid {
    grid-template-columns: 1fr 1fr !important;
  }
  .ai-banner-title {
    font-size: 22px;
  }
  .ai-banner-sub {
    font-size: 13px;
  }
  .ai-cards-row {
    grid-template-columns: repeat(2, 1fr) !important;
  }
  .container {
    padding: 0 12px;
  }
}