/* ==========================================================================
   Campus Book House — Design System
   Clean & Academic theme
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-primary:       #1e4976;   /* bookseller blue */
  --color-primary-dark:  #123252;
  --color-primary-light: #315f8e;
  --color-accent:        #8e2f2c;   /* restrained oxblood */
  --color-accent-light:  #b24a45;
  --color-accent-muted:  #f2e5df;

  --color-bg:            #ffffff;
  --color-surface:       #ffffff;
  --color-surface-alt:   #f5f1e8;

  --color-text:          #1c1c1e;
  --color-text-muted:    #6b7280;
  --color-text-light:    #9ca3af;

  --color-border:        #ddd6c9;
  --color-border-strong: #b9ad9a;

  --color-success:       #2d6a4f;
  --color-success-bg:    #d8f3dc;
  --color-error:         #9b1c1c;
  --color-error-bg:      #fee2e2;
  --color-warning:       #92400e;
  --color-warning-bg:    #fef3c7;

  /* Typography */
  --font-serif:  Georgia, 'Times New Roman', serif;
  --font-sans:   system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono:   'Courier New', Courier, monospace;

  --text-xs:    0.75rem;
  --text-sm:    0.875rem;
  --text-base:  1rem;
  --text-lg:    1.125rem;
  --text-xl:    1.25rem;
  --text-2xl:   1.5rem;
  --text-3xl:   1.875rem;
  --text-4xl:   2.25rem;
  --text-5xl:   3rem;

  --weight-normal:   400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-bold:     700;

  --leading-tight:  1.25;
  --leading-snug:   1.375;
  --leading-normal: 1.5;
  --leading-relaxed:1.625;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --container-max: 1240px;
  --container-pad: 1.5rem;

  /* Borders */
  --radius-sm:  4px;
  --radius-md:  4px;
  --radius-lg:  4px;
  --radius-xl:  6px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.05);
  --shadow-lg:  0 10px 15px rgba(0,0,0,0.08), 0 4px 6px rgba(0,0,0,0.04);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

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

a:hover {
  color: var(--color-accent);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* --------------------------------------------------------------------------
   3. Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section {
  padding: var(--space-16) 0;
}

.section--lg {
  padding: var(--space-24) 0;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  gap: var(--space-4);
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.section-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  white-space: nowrap;
}

.section-link:hover {
  text-decoration: underline;
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--5 { grid-template-columns: repeat(5, 1fr); }

.flex { display: flex; }
.flex--center { align-items: center; }
.flex--between { justify-content: space-between; }
.flex--gap-2 { gap: var(--space-2); }
.flex--gap-4 { gap: var(--space-4); }

/* --------------------------------------------------------------------------
   4. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-primary);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-lg { font-size: var(--text-lg); }
.font-serif { font-family: var(--font-serif); }
.font-medium { font-weight: var(--weight-medium); }
.font-semibold { font-weight: var(--weight-semibold); }
.font-bold { font-weight: var(--weight-bold); }

/* --------------------------------------------------------------------------
   5. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  transition: all var(--transition-fast);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

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

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

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

.btn--accent:hover {
  background: var(--color-accent-light);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

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

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1.5px solid var(--color-border);
}

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

.btn--sm {
  padding: 0.4rem var(--space-4);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: 0.875rem var(--space-8);
  font-size: var(--text-base);
}

.btn--full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   6. Header / Navigation
   -------------------------------------------------------------------------- */
.site-header {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 64px;
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  flex-shrink: 0;
}

.logo__name {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: #fff;
  letter-spacing: -0.01em;
}

.logo__tagline {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}

.logo:hover .logo__name {
  color: var(--color-accent-light);
}

.header-search {
  flex: 1;
  max-width: 480px;
}

.search-form {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.12);
  border: 1.5px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.search-form:focus-within {
  background: rgba(255,255,255,0.18);
  border-color: rgba(255,255,255,0.4);
}

.search-form input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: var(--space-2) var(--space-4);
  color: #fff;
  font-size: var(--text-sm);
}

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

.search-form button {
  padding: var(--space-2) var(--space-3);
  color: rgba(255,255,255,0.7);
  font-size: 1rem;
  transition: color var(--transition-fast);
}

.search-form button:hover {
  color: var(--color-accent-light);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}

.nav-link {
  color: rgba(255,255,255,0.8);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: #fff;
  background: rgba(255,255,255,0.1);
}

.nav-link--cart {
  position: relative;
}

.cart-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.625rem;
  font-weight: var(--weight-bold);
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* Category nav bar */
.category-nav {
  background: var(--color-primary-dark);
  border-top: 1px solid rgba(255,255,255,0.08);
}

.category-nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0;
  height: 40px;
}

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

.category-nav__link {
  color: rgba(255,255,255,0.65);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0 var(--space-3);
  white-space: nowrap;
  height: 40px;
  display: flex;
  align-items: center;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  border-bottom: 2px solid transparent;
}

.category-nav__link:hover, .category-nav__link.active {
  color: var(--color-accent-light);
  border-bottom-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   7. Hero
   -------------------------------------------------------------------------- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  padding: var(--space-20) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  position: relative;
}

.hero__label {
  display: inline-block;
  background: var(--color-accent-muted);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.hero__title {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: var(--weight-bold);
  color: #fff;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
}

.hero__title em {
  color: var(--color-accent-light);
  font-style: normal;
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.75);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
  max-width: 440px;
}

.hero__actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__book-stack {
  position: relative;
  width: 280px;
  height: 320px;
}

/* Decorative book stack illustration using CSS */
.book {
  position: absolute;
  border-radius: 4px 8px 8px 4px;
  box-shadow: var(--shadow-lg);
}

.book-1 {
  width: 180px; height: 240px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  bottom: 0; left: 50%; transform: translateX(-60%) rotate(-8deg);
}

.book-2 {
  width: 175px; height: 232px;
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  bottom: 0; left: 50%; transform: translateX(-40%) rotate(3deg);
}

.book-3 {
  width: 170px; height: 225px;
  background: linear-gradient(135deg, #059669, #047857);
  bottom: 0; left: 50%; transform: translateX(-50%) rotate(-2deg);
}

.book::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 12px;
  background: rgba(0,0,0,0.2);
  border-radius: 4px 0 0 4px;
}

/* --------------------------------------------------------------------------
   8. Product Card
   -------------------------------------------------------------------------- */
.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-strong);
}

.product-card__image {
  aspect-ratio: 3 / 4;
  background: var(--color-surface-alt);
  overflow: hidden;
  position: relative;
}

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.product-card:hover .product-card__image img {
  transform: scale(1.04);
}

.product-card__badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  background: var(--color-accent);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
}

.product-card__wishlist {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.9);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  opacity: 0;
  transition: opacity var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.product-card:hover .product-card__wishlist {
  opacity: 1;
}

.product-card__wishlist:hover {
  background: #fff;
}

.product-card__body {
  padding: var(--space-4);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card__subject {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-1);
}

.product-card__title {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  line-height: var(--leading-snug);
  margin-bottom: var(--space-1);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card__author {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.product-card__rating {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.stars {
  color: var(--color-accent);
  font-size: var(--text-xs);
  letter-spacing: 1px;
}

.rating-count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.product-card__footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.product-card__footer .price {
  min-width: 0;
}

.product-card__footer .btn {
  flex-shrink: 0;
}

.price {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px var(--space-2);
}

.price__current {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
}

.price__original {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  text-decoration: line-through;
}

.price__discount {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-success);
  white-space: nowrap;
  flex-basis: 100%;
}

/* --------------------------------------------------------------------------
   9. Category Cards
   -------------------------------------------------------------------------- */
.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--transition-normal);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.category-card:hover {
  border-color: var(--color-primary);
  background: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.category-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xl);
  background: var(--color-accent-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: background var(--transition-normal);
}

.category-card:hover .category-card__icon {
  background: rgba(255,255,255,0.15);
}

.category-card__title {
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  transition: color var(--transition-normal);
}

.category-card:hover .category-card__title {
  color: #fff;
}

.category-card__count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  transition: color var(--transition-normal);
}

.category-card:hover .category-card__count {
  color: rgba(255,255,255,0.65);
}

/* --------------------------------------------------------------------------
   10. Banner / Promo Strip
   -------------------------------------------------------------------------- */
.promo-strip {
  background: var(--color-accent);
  color: #fff;
  text-align: center;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
}

.promo-strip strong {
  font-weight: var(--weight-bold);
}

/* --------------------------------------------------------------------------
   11. Forms
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.625rem var(--space-4);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 39, 68, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-light);
}

.form-hint {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.form-error {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-error);
}

.form-input.is-error {
  border-color: var(--color-error);
}

/* --------------------------------------------------------------------------
   12. Breadcrumb
   -------------------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin-right: var(--space-2);
  color: var(--color-border-strong);
}

.breadcrumb__item a {
  color: var(--color-text-muted);
}

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

.breadcrumb__item--active {
  color: var(--color-text);
  font-weight: var(--weight-medium);
}

/* --------------------------------------------------------------------------
   13. Sidebar Filters (Catalogue page)
   -------------------------------------------------------------------------- */
.filter-group {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-5) 0;
}

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

.filter-group__title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.filter-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.filter-option input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.filter-option__count {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   14. Cart
   -------------------------------------------------------------------------- */
.cart-item {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-border);
  align-items: start;
}

.cart-item__image {
  width: 80px;
  height: 106px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
}

.cart-item__title {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.cart-item__author {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.qty-control {
  display: inline-flex;
  align-items: center;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.qty-control button {
  width: 32px;
  height: 32px;
  font-size: 1rem;
  color: var(--color-primary);
  background: var(--color-surface);
  transition: background var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.qty-control button:hover {
  background: var(--color-surface-alt);
}

.qty-control__value {
  width: 40px;
  text-align: center;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  border: none;
  outline: none;
  background: var(--color-surface);
  color: var(--color-text);
}

.cart-item__remove {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  display: block;
  cursor: pointer;
}

.cart-item__remove:hover {
  color: var(--color-error);
}

/* Order summary card */
.order-summary {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: sticky;
  top: 80px;
}

.order-summary__title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
  color: var(--color-text-muted);
}

.summary-row.total {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1.5px solid var(--color-border);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   15. Badges / Tags / Pills
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
}

.badge--primary { background: var(--color-primary); color: #fff; }
.badge--accent  { background: var(--color-accent);  color: #fff; }
.badge--success { background: var(--color-success-bg); color: var(--color-success); }
.badge--warning { background: var(--color-warning-bg); color: var(--color-warning); }
.badge--error   { background: var(--color-error-bg);   color: var(--color-error); }
.badge--neutral { background: var(--color-surface-alt); color: var(--color-text-muted); }

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   16. Toast Notifications
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  min-width: 280px;
  max-width: 360px;
  animation: toast-in 0.3s ease;
}

.toast--success { background: var(--color-success); }
.toast--error   { background: var(--color-error); }

@keyframes toast-in {
  from { transform: translateX(120%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* --------------------------------------------------------------------------
   17. Empty States
   -------------------------------------------------------------------------- */
.empty-state {
  text-align: center;
  padding: var(--space-20) var(--space-8);
}

.empty-state__icon {
  font-size: 3rem;
  margin-bottom: var(--space-5);
  opacity: 0.4;
}

.empty-state__title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.empty-state__body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 360px;
  margin: 0 auto var(--space-8);
  line-height: var(--leading-relaxed);
}

/* --------------------------------------------------------------------------
   18. Divider
   -------------------------------------------------------------------------- */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}

/* --------------------------------------------------------------------------
   19. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.7);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-20);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand__name {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: #fff;
  margin-bottom: var(--space-3);
}

.footer-brand__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  max-width: 280px;
  margin-bottom: var(--space-5);
}

.footer-col__title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: #fff;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer-col a {
  display: block;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-2);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}

/* --------------------------------------------------------------------------
   20. Loading Skeleton
   -------------------------------------------------------------------------- */
@keyframes shimmer {
  0%   { background-position: -468px 0; }
  100% { background-position: 468px 0; }
}

.skeleton {
  background: linear-gradient(90deg, var(--color-surface-alt) 25%, #e8e4dc 50%, var(--color-surface-alt) 75%);
  background-size: 936px 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   21. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(3, 1fr); }
  .grid--5 { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}

@media (max-width: 768px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { display: none; }
  .grid--2, .grid--3, .grid--4, .grid--5 { grid-template-columns: repeat(2, 1fr); }
  .header-search { display: none; }
  .category-nav { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .footer-grid > div:not(:first-child) { display: none; }
  .cart-item { grid-template-columns: 64px 1fr; }
  .hero__title { font-size: var(--text-3xl); }
}

@media (max-width: 480px) {
  .grid--2 { grid-template-columns: 1fr; }
  :root { --container-pad: 1rem; }
}

/* ==========================================================================
   22. Campus Books Retail Theme
   Mature academic merchandising with compact, content-first components.
   ========================================================================== */
body {
  background: #fff;
}

.section {
  padding: 3.5rem 0;
}

.section-title {
  color: #17263a;
  font-size: 1.8rem;
  font-weight: var(--weight-bold);
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-top: 0.35rem;
}

.section-link {
  color: var(--color-accent);
  font-weight: var(--weight-semibold);
}

.btn {
  min-height: 42px;
  border-radius: 3px;
  letter-spacing: 0;
}

.btn--outline {
  background: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--outline:hover {
  background: var(--color-accent);
}

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

.btn--light:hover {
  background: var(--color-surface-alt);
  color: var(--color-primary-dark);
}

/* Shared header */
.site-header {
  background: #fff;
  box-shadow: none;
  border-bottom: 1px solid var(--color-border);
}

.header-assurance {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.9);
  font-family: var(--font-serif);
  font-size: 0.76rem;
}

.header-assurance .container {
  min-height: 31px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.25rem;
}

.header-assurance span + span::before {
  content: '•';
  color: rgba(255,255,255,0.45);
  margin-right: 2.25rem;
}

.header-inner {
  min-height: 91px;
  height: auto;
  gap: 2.5rem;
}

.logo {
  width: 190px;
  color: var(--color-primary);
}

.logo__name {
  color: var(--color-primary);
  font-size: 1.75rem;
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

.logo__name--second {
  font-size: 1.05rem;
  letter-spacing: 0.22em;
  margin-top: 0.18rem;
}

.logo__tagline {
  color: var(--color-accent);
  font-size: 0.55rem;
  letter-spacing: 0.16em;
  margin-top: 0.3rem;
}

.logo:hover .logo__name {
  color: var(--color-primary-light);
}

.header-search {
  max-width: none;
}

.search-form {
  height: 45px;
  background: #fff;
  border: 1px solid #aaa69d;
  border-radius: 3px;
}

.search-form:focus-within {
  background: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,73,118,0.1);
}

.search-form input {
  color: var(--color-text);
  padding-left: 1rem;
}

.search-form input::placeholder {
  color: #858585;
}

.search-form button {
  width: 52px;
  height: 45px;
  display: grid;
  place-items: center;
  background: var(--color-primary);
  color: #fff;
  padding: 0;
}

.search-form button:hover {
  color: #fff;
  background: var(--color-primary-light);
}

.search-form svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
}

.header-nav {
  gap: 0;
}

.header-nav > .nav-link:nth-child(-n+2) {
  display: none;
}

.nav-link {
  color: var(--color-primary-dark);
  border-left: 1px solid var(--color-border);
  border-radius: 0;
  padding: 0.25rem 1rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
  background: transparent;
}

.nav-link--utility,
.nav-link--cart {
  min-width: 78px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
}

.nav-link__label {
  color: var(--color-primary-dark);
  font-size: 0.8rem;
  font-weight: var(--weight-semibold);
}

.nav-link small {
  color: var(--color-text-muted);
  font-size: 0.65rem;
  font-weight: var(--weight-normal);
}

.cart-badge {
  top: -0.25rem;
  right: 0.25rem;
  background: var(--color-accent);
}

.category-nav {
  background: var(--color-primary);
  border: 0;
}

.category-nav__inner {
  height: 41px;
  justify-content: space-between;
}

.category-nav__link {
  height: 41px;
  padding: 0 0.7rem;
  color: rgba(255,255,255,0.9);
  font-family: var(--font-serif);
  font-size: 0.78rem;
  letter-spacing: 0;
  text-transform: none;
}

.category-nav__link:hover,
.category-nav__link.active {
  color: #fff;
  border-bottom-color: #d9c7a2;
}

/* Homepage hero */
.hero {
  background: var(--color-surface-alt);
  padding: 0;
}

.hero::before {
  display: none;
}

.hero__inner {
  width: 100%;
  max-width: none;
  margin: 0 auto;
  grid-template-columns: minmax(0, 46%) minmax(0, 54%);
  gap: 0;
  min-height: 408px;
}

.hero__content {
  padding: 4.5rem clamp(3rem, calc((100vw - var(--container-max)) / 2 + var(--container-pad)), 12rem);
  padding-right: 3.25rem;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero__title {
  color: #241f18;
  font-size: clamp(2.6rem, 4vw, 4.15rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin-bottom: 1.35rem;
}

.hero__subtitle {
  color: #4f4a42;
  font-size: 1.03rem;
  line-height: 1.6;
  max-width: 570px;
  margin-bottom: 1.8rem;
}

.hero__visual {
  min-height: 408px;
}

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

.hero__actions {
  gap: 0.8rem;
}

/* Store assurances */
.service-bar {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: #fff;
}

.service-bar__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.service-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1.15rem 1.4rem;
}

.service-item + .service-item {
  border-left: 1px solid var(--color-border);
}

.service-item__icon {
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: var(--weight-bold);
}

.service-item strong,
.service-item small {
  display: block;
}

.service-item strong {
  color: var(--color-primary-dark);
  font-size: 0.78rem;
}

.service-item small {
  color: var(--color-text-muted);
  font-size: 0.68rem;
  margin-top: 0.1rem;
}

/* Subject and product merchandising */
.subject-section {
  padding-bottom: 2.75rem;
}

.subject-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.subject-grid .skeleton {
  height: 92px;
}

.category-card {
  min-height: 92px;
  padding: 1.15rem;
  border: 0;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  display: grid;
  grid-template-columns: 42px 1fr auto;
  text-align: left;
  align-items: center;
  gap: 0.9rem;
}

.category-card:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-border);
  box-shadow: none;
  transform: none;
}

.category-card__icon {
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: 50%;
  color: var(--color-primary);
  font-family: var(--font-serif);
  font-size: 0.72rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.04em;
}

.category-card:hover .category-card__icon {
  background: var(--color-primary);
  color: #fff;
}

.category-card__title,
.category-card__count {
  display: block;
}

.category-card__title {
  color: var(--color-primary-dark);
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
}

.category-card:hover .category-card__title {
  color: var(--color-primary-dark);
}

.category-card__count {
  color: var(--color-text-muted);
  font-size: 0.66rem;
}

.category-card:hover .category-card__count {
  color: var(--color-text-muted);
}

.category-card__arrow {
  color: var(--color-accent);
}

.product-section {
  border-top: 1px solid var(--color-border);
  background: #fff;
}

.product-section--alt {
  background: #faf9f6;
}

.product-skeleton {
  height: 450px;
}

.product-card {
  background: transparent;
  border: 0;
  border-radius: 0;
  overflow: visible;
}

.product-card:hover {
  transform: none;
  box-shadow: none;
}

.product-card__image {
  aspect-ratio: 4 / 5;
  background: #f3f1ec;
  border: 1px solid #e5e1d9;
  padding: 1rem;
}

.product-card__image img {
  object-fit: contain;
}

.product-card:hover .product-card__image img {
  transform: scale(1.018);
}

.product-card__badge {
  top: 0.6rem;
  left: 0;
  background: var(--color-primary);
  border-radius: 0;
}

.product-card__wishlist {
  opacity: 1;
  box-shadow: none;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-primary);
}

.product-card__body {
  padding: 1rem 0 0;
}

.product-card__subject {
  color: var(--color-accent);
  font-size: 0.64rem;
  letter-spacing: 0.045em;
  margin-bottom: 0.35rem;
}

.product-card__title {
  color: #222;
  font-size: 1.02rem;
}

.product-card__author {
  font-size: 0.75rem;
  margin-bottom: 0.55rem;
}

.product-card__rating {
  margin-bottom: 0.65rem;
}

.stars {
  color: #b77b19;
}

.price__current {
  color: #1d211f;
  font-size: 1.05rem;
}

.price__discount {
  color: var(--color-accent);
  flex-basis: auto;
}

.product-card__footer {
  align-items: flex-end;
}

.product-card__footer .btn {
  padding: 0.55rem 0.75rem;
}

.semester-feature {
  padding: 2rem 0;
  background: #fff;
}

.semester-feature__inner {
  background: var(--color-primary);
  color: #fff;
  padding: 2.75rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.semester-feature__label {
  color: #dccca8;
  font-size: 0.7rem;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.11em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.semester-feature h2 {
  color: #fff;
  font-size: 2rem;
  max-width: 700px;
}

.semester-feature p:last-child {
  color: rgba(255,255,255,0.72);
  font-size: 0.88rem;
  margin-top: 0.55rem;
}

.publisher-strip {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 2rem 0;
}

.publisher-strip .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.publisher-strip p {
  color: var(--color-text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.publisher-strip__names {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: #4b514d;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: var(--weight-bold);
}

/* Shared interior surfaces */
.form-input,
.form-select,
.form-textarea,
.order-summary,
.qty-control {
  border-radius: 3px;
}

.site-footer {
  margin-top: 0;
  background: var(--color-primary-dark);
}

.footer-contact {
  color: rgba(255,255,255,0.58);
  font-size: var(--text-sm);
  line-height: 1.7;
}

@media (max-width: 1024px) {
  .header-inner { gap: 1.25rem; }
  .logo { width: 160px; }
  .nav-link--wishlist { display: none; }
  .hero__inner { grid-template-columns: 1fr 1fr; }
  .hero__content { padding-left: var(--container-pad); }
  .service-bar__grid { grid-template-columns: repeat(2, 1fr); }
  .service-item:nth-child(3) { border-left: 0; border-top: 1px solid var(--color-border); }
  .service-item:nth-child(4) { border-top: 1px solid var(--color-border); }
}

@media (max-width: 768px) {
  .header-assurance .container {
    justify-content: flex-start;
    overflow-x: auto;
    gap: 1.25rem;
    white-space: nowrap;
  }

  .header-assurance span + span::before {
    margin-right: 1.25rem;
  }

  .header-inner {
    min-height: 71px;
    justify-content: space-between;
  }

  .logo { width: auto; }
  .logo__name { font-size: 1.25rem; }
  .logo__name--second { font-size: 0.8rem; }
  .logo__tagline { display: none; }
  .header-search,
  .header-nav > .nav-link:not(.nav-link--cart) { display: none; }
  .header-nav { margin-left: auto; }
  .nav-link--cart { border: 0; min-width: auto; }
  .nav-link--cart small { display: none; }
  .category-nav { display: block; }
  .category-nav__inner { justify-content: flex-start; }

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

  .hero__content {
    padding: 3rem var(--container-pad);
  }

  .hero__title {
    font-size: 2.75rem;
  }

  .hero__visual {
    display: block;
    min-height: 280px;
    max-height: 340px;
  }

  .service-bar__grid {
    grid-template-columns: 1fr 1fr;
  }

  .service-item {
    padding: 0.9rem 0.5rem;
    gap: 0.55rem;
  }

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

  .section-header {
    align-items: flex-end;
  }

  .section-subtitle {
    display: none;
  }

  .semester-feature__inner {
    padding: 2rem;
    align-items: flex-start;
    flex-direction: column;
  }

  .publisher-strip .container,
  .publisher-strip__names {
    align-items: flex-start;
    flex-direction: column;
  }

  .publisher-strip__names {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
  }
}

@media (max-width: 480px) {
  .section { padding: 2.75rem 0; }
  .section-title { font-size: 1.5rem; }
  .section-link { font-size: 0.72rem; }
  .hero__content { padding-block: 2.5rem; }
  .hero__title { font-size: 2.3rem; }
  .hero__subtitle { font-size: 0.94rem; }
  .hero__actions .btn { flex: 1; padding-inline: 0.75rem; }
  .hero__visual { min-height: 230px; }
  .service-item:nth-child(2) { border-left: 1px solid var(--color-border); }
  .service-item strong { font-size: 0.7rem; }
  .service-item small { display: none; }
  .subject-grid { grid-template-columns: 1fr; }
  .category-card { min-height: 76px; }
  .grid--3, .grid--4, .grid--5 { grid-template-columns: 1fr 1fr; gap: 1.25rem 0.75rem; }
  .product-card__image { padding: 0.65rem; }
  .product-card__body { padding-top: 0.7rem; }
  .product-card__subject { display: none; }
  .product-card__title { font-size: 0.88rem; }
  .product-card__footer { align-items: flex-start; flex-direction: column; }
  .product-card__footer .btn { width: 100%; }
  .publisher-strip__names { grid-template-columns: 1fr 1fr; }
}

/* Omnibus Handlebars template additions */
.product-card { position: relative; }
.product-card__link { color: inherit; display: block; text-decoration: none; }
.product-card__add { margin: 0 1rem 1rem; width: calc(100% - 2rem); }
.catalogue-heading { padding-top: var(--space-8); }
.catalogue-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: var(--space-10); padding-bottom: var(--space-16); }
.sidebar { align-self: start; border: 1px solid var(--color-border); padding: var(--space-5); }
.filter-group { border: 0; border-bottom: 1px solid var(--color-border); margin: 0; padding: var(--space-4) 0; }
.filter-group legend { color: var(--color-primary); font-weight: 700; margin-bottom: var(--space-2); }
.filter-group label { display: block; margin: var(--space-2) 0; }
.toolbar { align-items: center; display: flex; justify-content: flex-end; gap: var(--space-3); margin-bottom: var(--space-5); }
.product-layout { display: grid; grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr); gap: var(--space-12); padding: var(--space-8) 0 var(--space-16); }
.product-gallery { background: var(--color-surface); border: 1px solid var(--color-border); display: grid; min-height: 520px; place-items: center; padding: var(--space-8); }
.product-detail-image { max-height: 480px; max-width: 100%; object-fit: contain; }
.product-info h1 { color: var(--color-primary); font-family: var(--font-serif); font-size: var(--text-3xl); margin: var(--space-3) 0; }
.product-detail-price { align-items: baseline; display: flex; gap: var(--space-3); margin: var(--space-6) 0; }
.product-description { color: var(--color-text-muted); line-height: 1.7; }
.product-purchase { align-items: end; display: grid; grid-template-columns: 90px 1fr; gap: var(--space-3); margin-top: var(--space-6); }
.product-purchase .btn { grid-column: 1 / -1; }
.quantity-input { width: 90px; }
.product-attributes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--color-border); border: 1px solid var(--color-border); margin-bottom: var(--space-8); }
.product-attributes div { background: var(--color-surface); display: grid; grid-template-columns: 1fr 1.5fr; padding: var(--space-3); }
.product-attributes dt { color: var(--color-text-muted); }
.product-attributes dd { margin: 0; }
.search-form--page { display: flex; gap: var(--space-3); margin-bottom: var(--space-8); max-width: 760px; }
.search-form--page .form-input { border: 1px solid var(--color-border); }
.cart-item { align-items: center; display: grid; grid-template-columns: 72px minmax(0, 1fr) auto; gap: var(--space-4); }
.cart-item img { height: 72px; object-fit: contain; width: 72px; }

.auth-page { align-items: center; display: flex; justify-content: center; min-height: 60vh; padding: var(--space-12) 0; }
.auth-card { background: var(--color-surface); border: 1px solid var(--color-border); max-width: 420px; padding: var(--space-10); width: 100%; }
.auth-card h1 { font-family: var(--font-serif); font-size: var(--text-3xl); margin: var(--space-2) 0 var(--space-5); }
.auth-card label { display: block; font-size: var(--text-sm); font-weight: var(--weight-medium); margin-bottom: var(--space-3); }
.auth-card .form-input { width: 100%; }
.auth-desc { color: var(--color-text-muted); margin-bottom: var(--space-6); }
.auth-footer { border-top: 1px solid var(--color-border); margin-top: var(--space-6); padding-top: var(--space-5); text-align: center; }
.form-error { background: var(--color-error-bg); border-radius: 4px; color: var(--color-error); font-size: var(--text-sm); margin: var(--space-2) 0; padding: var(--space-2); }

.order-card { border: 1px solid var(--color-border); margin-bottom: var(--space-5); }
.order-card__header { align-items: center; background: var(--color-surface-alt); display: flex; flex-wrap: wrap; justify-content: space-between; padding: var(--space-4); }
.order-card__header .badge { margin-left: var(--space-2); }
.order-card__body { padding: var(--space-4); }
.order-card__footer { border-top: 1px solid var(--color-border); display: flex; justify-content: flex-end; padding: var(--space-4); }

.order-confirmation { margin: 0 auto; max-width: 640px; padding: var(--space-8) 0; text-align: center; }
.order-confirmation__icon { align-items: center; background: var(--color-success-bg); border-radius: 50%; color: var(--color-success); display: inline-flex; font-size: var(--text-3xl); height: 64px; justify-content: center; margin-bottom: var(--space-4); width: 64px; }
.order-confirmation h1 { font-family: var(--font-serif); font-size: var(--text-3xl); }
.order-confirmation__details { border: 1px solid var(--color-border); margin: var(--space-8) 0; padding: var(--space-6); text-align: left; }
.order-confirmation__summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); margin-bottom: var(--space-6); }
.order-confirmation__summary div span { color: var(--color-text-muted); display: block; font-size: var(--text-sm); }
.order-confirmation__address h3 { font-size: var(--text-base); margin-bottom: var(--space-2); }
.order-confirmation__items { margin-bottom: var(--space-8); text-align: left; }
.order-confirmation__items h3 { font-size: var(--text-base); margin-bottom: var(--space-4); }
.order-confirmation__items .cart-item { border-bottom: 1px solid var(--color-border); padding: var(--space-3) 0; }
.order-confirmation__actions { display: flex; gap: var(--space-3); justify-content: center; }

@media (max-width: 800px) {
  .catalogue-layout, .product-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .product-gallery { min-height: 360px; }
  .product-attributes { grid-template-columns: 1fr; }
  .order-confirmation__summary { grid-template-columns: 1fr; }
}