/* ============================================================
   BookStore – Automation Practice Website
   main.css
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --color-primary:      #4f46e5;
  --color-primary-dark: #3730a3;
  --color-primary-light:#6366f1;
  --color-accent:       #f59e0b;
  --color-bg:           #f8f7ff;
  --color-bg-alt:       #eef2ff;
  --color-surface:      #ffffff;
  --color-border:       #e2e8f0;
  --color-text:         #1e1b4b;
  --color-text-muted:   #64748b;
  --color-error:        #ef4444;
  --color-success:      #22c55e;
  --color-discount:     #ef4444;

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  --shadow-sm:  0 1px 3px rgba(79,70,229,.08);
  --shadow-md:  0 4px 16px rgba(79,70,229,.12);
  --shadow-lg:  0 8px 32px rgba(79,70,229,.16);

  --transition: 0.2s ease;
  --font-main: 'Inter', system-ui, sans-serif;

  --header-h: 64px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }

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

h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; color: var(--color-text); }
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.3rem, 3vw, 1.8rem); }
h3 { font-size: 1.15rem; }

/* ---------- Utility ---------- */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}
.hidden { display: none !important; }
.section { padding: 64px 0; }
.section-alt { background: var(--color-bg-alt); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); color: #fff; }

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: #fff; }

.btn-full { width: 100%; }
.btn-lg { padding: 14px 28px; font-size: 1.05rem; }
.btn-sm { padding: 7px 14px; font-size: 0.85rem; }

/* ---------- Header ---------- */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  height: var(--header-h);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 24px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  flex-shrink: 0;
}
.logo:hover { color: var(--color-primary-dark); }

#main-nav {
  display: flex;
  gap: 4px;
  flex: 1;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition);
}
.nav-link:hover, .nav-link.active {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.cart-icon {
  position: relative;
  font-size: 1.4rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.cart-icon:hover { background: var(--color-bg-alt); color: var(--color-primary); }

.cart-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--color-primary);
  color: #fff;
  border-radius: 999px;
  padding: 1px 6px;
  min-width: 20px;
  text-align: center;
}

/* ---------- Page Banner ---------- */
.page-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  padding: 40px 0;
}
.page-banner h1 { color: #fff; margin-bottom: 8px; }
.breadcrumb { font-size: 0.9rem; opacity: 0.8; }
.breadcrumb a { color: rgba(255,255,255,.8); }
.breadcrumb a:hover { color: #fff; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 60%, #4338ca 100%);
  color: #fff;
  padding: 80px 0;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-text h1 {
  color: #fff;
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 16px;
  line-height: 1.15;
}
.hero-text p {
  font-size: 1.05rem;
  opacity: .85;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}
.book-stack {
  position: relative;
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.book {
  font-size: 5rem;
  position: absolute;
  animation: float 3s ease-in-out infinite;
  filter: drop-shadow(0 8px 16px rgba(0,0,0,.3));
}
.book-1 { top: 0; left: 20px; animation-delay: 0s; }
.book-2 { top: 40px; left: 80px; animation-delay: .5s; font-size: 6rem; }
.book-3 { top: 80px; left: 10px; animation-delay: 1s; }

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(-3deg); }
  50%       { transform: translateY(-10px) rotate(3deg); }
}

/* ---------- Section Header ---------- */
.section-title {
  margin-bottom: 36px;
  position: relative;
  padding-bottom: 14px;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 48px; height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}
.section-footer { text-align: center; margin-top: 40px; }

/* ---------- Product Grid ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.product-image {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4.5rem;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.product-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.product-category {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-primary-light);
}

.product-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.35;
  flex: 1;
}
.product-name a { color: inherit; }
.product-name a:hover { color: var(--color-primary); }

.product-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.product-footer {
  padding: 0 16px 16px;
}

.add-to-cart-btn {
  width: 100%;
}

/* ---------- Category Grid ---------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-decoration: none;
  color: var(--color-text);
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}
.cat-icon { font-size: 2.5rem; }
.cat-name { font-weight: 700; font-size: 1rem; }
.cat-count { font-size: 0.8rem; color: var(--color-text-muted); }

/* ---------- Shop Layout ---------- */
.shop-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 36px;
  align-items: start;
}

.shop-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 16px);
}

.sidebar-widget {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
}

.widget-title {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-text-muted);
  margin-bottom: 14px;
}

.search-box { display: flex; gap: 8px; }
.search-box input { flex: 1; }

.category-list { list-style: none; }
.category-list li { border-bottom: 1px solid var(--color-border); }
.category-list li:last-child { border-bottom: none; }
.cat-filter {
  display: flex;
  justify-content: space-between;
  padding: 10px 4px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.cat-filter:hover, .cat-filter.active { color: var(--color-primary); }
.cat-filter.active { font-weight: 600; }
.cat-filter span { opacity: .6; }

.price-range input[type=range] {
  width: 100%;
  accent-color: var(--color-primary);
  margin-bottom: 8px;
}
.price-labels { display: flex; justify-content: space-between; font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 12px; }

.shop-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}
.result-count { font-size: 0.9rem; color: var(--color-text-muted); }
.sort-wrap { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; }
.sort-wrap select {
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.9rem;
  background: var(--color-surface);
  cursor: pointer;
}

/* ---------- Pagination ---------- */
.pagination {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-top: 36px;
  flex-wrap: wrap;
}
.page-btn {
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  font-family: var(--font-main);
  font-size: 0.9rem;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.page-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.page-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.page-btn:disabled { opacity: .4; cursor: default; }

/* ---------- No Results ---------- */
.no-results { text-align: center; padding: 48px 0; color: var(--color-text-muted); }

/* ---------- Auth Layout ---------- */
.auth-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  max-width: 900px;
  margin: 0 auto;
}

.auth-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}
.auth-card h2 { margin-bottom: 24px; }

.centered-card {
  max-width: 440px;
  margin: 0 auto;
}

/* ---------- Forms ---------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 18px;
}
.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.95rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}
.form-group input.input-error { border-color: var(--color-error); }
.form-group input[readonly] { opacity: .6; cursor: not-allowed; }

.form-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  gap: 12px;
  flex-wrap: wrap;
}
.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  cursor: pointer;
}
.forgot-link { font-size: 0.85rem; color: var(--color-text-muted); }
.forgot-link:hover { color: var(--color-primary); }

.field-error { font-size: 0.8rem; color: var(--color-error); min-height: 18px; }
.field-hint { font-size: 0.78rem; color: var(--color-text-muted); }
.form-error {
  font-size: 0.9rem;
  color: var(--color-error);
  background: #fee2e2;
  border: 1px solid #fca5a5;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 16px;
  display: none;
}
.form-error:not(:empty) { display: block; }
.form-section-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--color-text-muted);
  margin: 20px 0 12px;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}
.privacy-note { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 12px; text-align: center; }
.back-link { text-align: center; margin-top: 16px; font-size: 0.9rem; }

/* ---------- Account Logged In ---------- */
.account-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: start;
}
.account-sidebar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.account-greeting {
  font-size: 0.9rem;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}
.account-nav { display: flex; flex-direction: column; gap: 2px; }
.account-nav-link {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition);
}
.account-nav-link:hover, .account-nav-link.active {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}
.account-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.account-tab { }
.account-tab h3 { margin-bottom: 20px; }

/* Orders table */
.orders-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.orders-table th, .orders-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.orders-table th { font-weight: 600; color: var(--color-text-muted); background: var(--color-bg-alt); }
.orders-table tr:hover td { background: var(--color-bg); }
.status-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.status-completed { background: #dcfce7; color: #166534; }
.status-processing { background: #fef3c7; color: #92400e; }
.status-pending    { background: #e0e7ff; color: #3730a3; }

/* ---------- Basket ---------- */
.cart-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  align-items: start;
}
.cart-item {
  display: grid;
  grid-template-columns: 70px 1fr auto auto;
  gap: 16px;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 12px;
}
.cart-item-emoji {
  font-size: 2.8rem;
  text-align: center;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  padding: 8px;
}
.cart-item-info .item-name { font-weight: 600; font-size: 0.95rem; }
.cart-item-info .item-price { font-size: 0.85rem; color: var(--color-text-muted); margin-top: 4px; }
.qty-control { display: flex; align-items: center; gap: 8px; }
.qty-btn {
  width: 30px; height: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.qty-btn:hover { background: var(--color-bg-alt); }
.qty-input {
  width: 48px;
  text-align: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px;
  font-size: 0.9rem;
  font-family: var(--font-main);
}
.remove-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  transition: color var(--transition);
  padding: 6px;
  border-radius: var(--radius-sm);
}
.remove-btn:hover { color: var(--color-error); background: #fee2e2; }

.coupon-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
}
.coupon-box h3 { font-size: 1rem; margin-bottom: 12px; }
.coupon-row { display: flex; gap: 8px; }
.coupon-row input { flex: 1; }
.coupon-result { font-size: 0.85rem; margin-top: 8px; }

.cart-totals {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.cart-totals h3 { margin-bottom: 16px; }
.totals-table { width: 100%; border-collapse: collapse; }
.totals-table td { padding: 8px 0; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; }
.totals-table td:last-child { text-align: right; }
.totals-table .total-row td { padding-top: 12px; border-bottom: none; font-size: 1rem; }
.discount-amount { color: var(--color-discount); font-weight: 600; }
.cart-totals .btn { margin-top: 14px; }

.empty-state {
  text-align: center;
  padding: 64px 0;
}
.empty-state p { color: var(--color-text-muted); margin-bottom: 20px; font-size: 1.1rem; }

/* ---------- Checkout ---------- */
.checkout-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 36px;
  align-items: start;
}
.checkout-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.checkout-form h2 { margin-bottom: 24px; padding-bottom: 12px; border-bottom: 1px solid var(--color-border); }

.payment-methods { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
.payment-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.payment-option:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-bg-alt);
}
.payment-option input { accent-color: var(--color-primary); }
.payment-label { font-size: 0.95rem; font-weight: 500; }

.card-fields {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
}

.order-summary {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: sticky;
  top: calc(var(--header-h) + 16px);
}
.order-summary h3 { margin-bottom: 16px; }
.order-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}
.order-item:last-child { border-bottom: none; }
.order-item-name { font-weight: 500; flex: 1; }
.order-item-qty { color: var(--color-text-muted); font-size: 0.82rem; }
.order-item-price { font-weight: 600; flex-shrink: 0; }
.summary-totals { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.summary-row { display: flex; justify-content: space-between; font-size: 0.9rem; }
.summary-row.total-row { font-size: 1.05rem; padding-top: 10px; border-top: 1px solid var(--color-border); }

/* ---------- Modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.5);
  backdrop-filter: blur(4px);
}
.modal-box {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  max-width: 440px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: modalIn .25s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(.9) translateY(20px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.success-icon { font-size: 3.5rem; margin-bottom: 16px; }
.modal-box h2 { margin-bottom: 12px; }
.order-number {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: 12px 0 24px;
}
.modal-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- Contact ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info h2, .contact-form-wrap h2 { margin-bottom: 20px; }
.info-list { list-style: none; display: flex; flex-direction: column; gap: 14px; font-size: 0.95rem; }
.contact-note { font-size: 0.82rem; color: var(--color-text-muted); margin-top: 20px; background: var(--color-bg-alt); padding: 10px 14px; border-radius: var(--radius-sm); }
.contact-form-wrap { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 32px; }

/* ---------- Success Message ---------- */
.success-message {
  background: #dcfce7;
  border: 1px solid #86efac;
  color: #166534;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 0.95rem;
  margin-top: 16px;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 300;
  background: var(--color-text);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  max-width: 320px;
  box-shadow: var(--shadow-lg);
  transform: translateY(16px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s, transform .25s;
}
.toast.toast-show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.toast.toast-success { background: #166534; }
.toast.toast-error   { background: #991b1b; }

/* ---------- Spinner ---------- */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Loading Overlay ---------- */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,.8);
  backdrop-filter: blur(4px);
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
}
.loading-overlay .big-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
.loading-overlay p { color: var(--color-text-muted); font-size: 0.9rem; }

/* ---------- Footer ---------- */
#site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,.8);
  margin-top: auto;
}
.footer-inner {
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-note { font-size: 0.8rem; opacity: .6; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .shop-layout { grid-template-columns: 1fr; }
  .shop-sidebar { position: static; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { display: none; }
  .auth-layout { grid-template-columns: 1fr; }
  .account-layout { grid-template-columns: 1fr; }
  .cart-layout { grid-template-columns: 1fr; }
  .checkout-layout { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .form-row-2 { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .header-inner { flex-wrap: wrap; gap: 8px; }
  #main-nav { gap: 0; }
  .nav-link { padding: 6px 10px; font-size: 0.82rem; }
  .cart-item { grid-template-columns: 50px 1fr; }
  .cart-item-emoji { font-size: 2rem; }
}