/* ===== BookMart - Common Styles ===== */
/* Design System & Global Styles */

/* Fonts: Playfair Display (headings) + Inter (body). Falls back to serif/sans if offline. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Playfair+Display:wght@600;700;800&display=swap');

/* ===== CSS Variables — BookMart Design System (dark digital-library theme) ===== */
:root {
  /* ---- New palette ---- */
  --color-background: #07111f;
  --color-background-secondary: #0d1b2a;
  --color-surface: #132238;
  --color-surface-light: #1c3048;

  --color-cream: #f5efe3;
  --color-gold: #f4b942;
  --color-gold-hover: #ffc857;
  --color-blue: #4ea8de;
  --color-blue-light: #7cc6fe;
  --color-brown: #6f4e37;

  --color-text-primary: #f8fafc;
  --color-text-secondary: #aab7c4;
  --color-text-dark: #15202b;

  --color-success: #2fbf71;
  --color-warning: #f4a261;
  --color-danger: #e85d75;

  --border-soft: rgba(255, 255, 255, 0.12);
  --glass-background: rgba(19, 34, 56, 0.7);
  --glass-background-light: rgba(255, 255, 255, 0.08);

  /* ---- Legacy aliases: repointed to the new palette so existing page
     styles adopt the dark theme without needing per-file rewrites ---- */
  --primary: var(--color-surface);
  --primary-light: var(--color-surface-light);
  --primary-dark: var(--color-background);
  --accent: var(--color-gold);
  --accent-light: var(--color-gold-hover);
  --accent-dark: #d99a2b;
  --secondary: var(--color-gold);
  --secondary-light: var(--color-gold-hover);

  --text-primary: var(--color-text-primary);
  --text-secondary: var(--color-text-secondary);
  --text-light: rgba(248, 250, 252, 0.5);
  --text-white: #ffffff;

  --bg-primary: var(--color-surface);
  --bg-secondary: var(--color-background-secondary);
  --bg-dark: var(--color-background);
  --bg-accent: rgba(244, 185, 66, 0.1);

  --border: var(--border-soft);
  --border-light: rgba(255, 255, 255, 0.06);

  /* ---- Spacing system ---- */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 5rem;
  --space-4xl: 7rem;
  /* Legacy spacing kept at original values to preserve existing layouts */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 5rem;

  /* ---- Border radius system ---- */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  /* ---- Shadow system ---- */
  --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 16px 40px rgba(0, 0, 0, 0.22);
  --shadow-lg: 0 28px 70px rgba(0, 0, 0, 0.32);
  --shadow-glow: 0 0 35px rgba(78, 168, 222, 0.25);
  --shadow-gold: 0 0 30px rgba(244, 185, 66, 0.2);
  /* Legacy shadow aliases */
  --shadow: var(--shadow-sm);
  --shadow-hover: var(--shadow-lg);

  /* ---- Typography ---- */
  --font-primary: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-heading: 'Playfair Display', 'Georgia', 'Times New Roman', serif;

  /* Transitions */
  --transition: all 0.3s ease;
  --transition-fast: all 0.15s ease;

  /* Container */
  --container-max: 1200px;
  --header-height: 80px;
}

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

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

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  background-color: var(--color-background);
  /* Soft cinematic glow — cool blue top-left, warm gold top-right */
  background-image:
    radial-gradient(1200px 600px at 12% -10%, rgba(78, 168, 222, 0.10), transparent 60%),
    radial-gradient(1000px 520px at 100% 0%, rgba(244, 185, 66, 0.07), transparent 55%);
  background-attachment: fixed;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul, ol {
  list-style: none;
}

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

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
  color: var(--text-primary);
}

input::placeholder, textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

/* Style native select dropdown options for the dark theme */
option {
  background: var(--color-surface);
  color: var(--text-primary);
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

/* Section Titles */
.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
  padding-bottom: var(--spacing-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

.section-title h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

.section-title p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
}

/* Primary: warm gold with dark text (accessible) + gold glow */
.btn-primary {
  background: var(--color-gold);
  color: var(--color-text-dark);
  border-color: var(--color-gold);
}

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

/* Secondary: soft glass */
.btn-secondary {
  background: var(--glass-background-light);
  color: var(--color-text-primary);
  border-color: var(--border-soft);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.btn-secondary:hover {
  background: var(--color-surface-light);
  color: var(--color-text-primary);
  border-color: var(--color-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Outline: blue accent */
.btn-outline {
  background: transparent;
  color: var(--color-blue-light);
  border-color: var(--color-blue);
}

.btn-outline:hover {
  background: var(--color-blue);
  color: var(--color-text-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Light: cream CTA for use on dark hero backgrounds */
.btn-light {
  background: var(--color-cream);
  color: var(--color-text-dark);
  border-color: var(--color-cream);
}

.btn-light:hover {
  background: #ffffff;
  color: var(--color-text-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

/* ===== Header / Navigation ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 27, 42, 0.5);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  backdrop-filter: saturate(160%) blur(18px);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.header-top {
  background: var(--primary);
  color: var(--text-white);
  padding: 8px 0;
  font-size: 0.85rem;
}

.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-top-links {
  display: flex;
  gap: var(--spacing-lg);
}

.header-top-links a:hover {
  color: var(--secondary);
}

.top-link {
  color: rgba(255,255,255,0.8);
  font-size: 0.85rem;
}

.top-link:hover {
  color: var(--secondary);
}

.top-separator {
  color: rgba(255,255,255,0.3);
  margin: 0 8px;
}

.top-link-accent {
  color: var(--secondary);
  font-size: 0.85rem;
}

.top-link-accent:hover {
  color: var(--secondary-light);
}

.header-main {
  padding: 15px 0;
}

.header-main .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-text-primary);
  font-family: var(--font-heading);
}

.logo span {
  color: var(--color-gold);
}

.logo-icon {
  font-size: 2rem;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-links > li > a {
  padding: 8px 12px;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  position: relative;
}

.nav-links > li > a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}

.nav-links > li > a:hover::after,
.nav-links > li > a.active::after {
  width: 70%;
}

.nav-links > li > a:hover,
.nav-links > li > a.active {
  color: var(--accent);
}

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-primary);
  min-width: 200px;
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 100;
}

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

.dropdown-menu li a {
  display: block;
  padding: 10px 20px;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.dropdown-menu li a:hover {
  background: var(--bg-secondary);
  color: var(--accent);
  padding-left: 25px;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-actions a {
  font-size: 1.3rem;
  color: var(--text-primary);
  position: relative;
  padding: 8px;
  border-radius: 50%;
  transition: var(--transition);
}

.header-actions a:hover {
  color: var(--accent);
  background: var(--bg-secondary);
}

.cart-link {
  color: var(--text-primary);
}

.cart-count {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--color-gold);
  color: var(--color-text-dark);
  font-size: 0.7rem;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.search-toggle {
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: var(--transition);
}

.search-toggle:hover {
  color: var(--accent);
  background: var(--bg-secondary);
}

/* Search Bar */
.search-bar {
  display: none;
  padding: 15px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.search-bar.active {
  display: block;
}

.search-bar .container {
  display: flex;
  gap: var(--spacing-sm);
}

.search-bar input {
  flex: 1;
  padding: 12px 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: var(--transition);
}

.search-bar input:focus {
  border-color: var(--accent);
}

.search-bar button {
  padding: 12px 30px;
  background: var(--accent);
  color: var(--text-white);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.search-bar button:hover {
  background: var(--accent-dark);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
  color: var(--text-white);
  padding: var(--spacing-2xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y="50" font-size="20" fill="rgba(255,255,255,0.03)">📚</text></svg>');
  background-size: 80px;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.hero-content h1 {
  font-size: 3rem;
  color: var(--text-white);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.hero-content h1 span {
  color: var(--secondary);
}

.hero-content p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

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

.hero-image-placeholder {
  width: 350px;
  height: 350px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  border: 2px dashed rgba(255, 255, 255, 0.2);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

/* ===== Features Section ===== */
.features {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  background: var(--bg-secondary);
  padding: 15px 0;
  border-bottom: 1px solid var(--border-light);
}

.breadcrumb ul {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.9rem;
}

.breadcrumb ul li {
  color: var(--text-secondary);
}

.breadcrumb ul li a {
  color: var(--color-blue);
}

.breadcrumb ul li a:hover {
  color: var(--accent);
}

.breadcrumb ul li::after {
  content: '/';
  margin-left: var(--spacing-sm);
  color: var(--text-light);
}

.breadcrumb ul li:last-child::after {
  display: none;
}

/* ===== Page Banner ===== */
.page-banner {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--text-white);
  padding: 60px 0;
  text-align: center;
}

.page-banner h1 {
  font-size: 2.5rem;
  color: var(--text-white);
  margin-bottom: var(--spacing-sm);
}

.page-banner p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Books Grid ===== */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-lg);
  padding: var(--spacing-xl) 0;
}

.book-card {
  /* translucent glass over the dark canvas (no blur here — many cards, keep it cheap) */
  background: linear-gradient(160deg, rgba(28, 48, 72, 0.66), rgba(19, 34, 56, 0.55));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.book-card:hover {
  transform: translateY(-5px);
  border-color: rgba(78, 168, 222, 0.35);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

/* ===== Favorite / wishlist heart (top-right of every book card) ===== */
.fav-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 4;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(7, 17, 31, 0.55);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border-soft);
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
  transition: transform .2s ease, color .2s ease, background .2s ease, border-color .2s ease;
}
.fav-btn:hover {
  color: var(--color-danger);
  border-color: rgba(232, 93, 117, 0.5);
  transform: scale(1.12);
}
.fav-btn.is-fav {
  color: var(--color-danger);
  background: rgba(232, 93, 117, 0.14);
  border-color: rgba(232, 93, 117, 0.55);
}
.fav-btn.pop { animation: favPop .4s ease; }
@keyframes favPop { 0%, 100% { transform: scale(1); } 40% { transform: scale(1.35); } }

.book-card-image {
  height: 250px;
  background: linear-gradient(135deg, var(--bg-secondary), var(--border-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.book-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.book-card:hover .book-card-image img {
  transform: scale(1.05);
}

.book-card .badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--accent);
  color: var(--text-white);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.book-card .badge.new {
  background: var(--secondary);
}

.book-card .badge.bestseller {
  background: var(--accent);
}

.book-card-body {
  padding: var(--spacing-md);
}

.book-card-body h3 {
  font-size: 1rem;
  margin-bottom: 5px;
  font-family: var(--font-primary);
}

.book-card-body .author {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.book-card-body .rating {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  margin-bottom: var(--spacing-sm);
}

/* ===== Star Rating Visual System ===== */
.star-rating {
  display: inline-flex;
  align-items: center;
  gap: 1px;
  line-height: 1;
}

.star-rating .star {
  position: relative;
  display: inline-block;
  font-size: 1.1em;
  line-height: 1;
  color: rgba(255, 255, 255, 0.2);
  transition: transform 0.15s ease, color 0.15s ease;
}

.star-rating .star.filled {
  color: var(--color-gold);
}

.star-rating .star.half {
  color: rgba(255, 255, 255, 0.2);
}

.star-rating .star.half::before {
  content: '★';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  clip-path: inset(0 50% 0 0);
  color: var(--color-gold);
}

.star-rating .star.empty {
  color: rgba(255, 255, 255, 0.2);
}

/* Hover shimmer effect on star containers */
.book-card:hover .star-rating .star {
  animation: starShimmer 0.6s ease;
}

@keyframes starShimmer {
  0%, 100% { transform: none; }
  50% { transform: scale(1.15); }
}

.book-card-body .rating .rating-value {
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
}

.book-card-body .price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--spacing-sm);
}

.book-card-body .price .original {
  font-size: 0.85rem;
  color: var(--text-light);
  text-decoration: line-through;
  margin-left: var(--spacing-sm);
  font-weight: 400;
}

.book-card-body .add-to-cart {
  width: 100%;
  padding: 10px;
  background: var(--color-blue);
  color: var(--color-text-dark);
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.85rem;
}

.book-card-body .add-to-cart:hover {
  background: var(--color-gold);
  color: var(--color-text-dark);
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xl) 0;
}

.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-weight: 500;
  transition: var(--transition);
}

.pagination a:hover,
.pagination a.active {
  background: var(--accent);
  color: var(--text-white);
  border-color: var(--accent);
}

/* ===== Footer ===== */
.footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--spacing-lg) 0 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h3 {
  color: var(--text-white);
  font-size: 0.85rem;
  margin-bottom: var(--spacing-sm);
  position: relative;
  padding-bottom: var(--spacing-xs);
}

.footer-section h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--accent);
}

.footer-section p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  line-height: 1.4;
  margin-bottom: 0.25rem;
}

.footer-section ul li {
  margin-bottom: 0.15rem;
}

.footer-section ul li a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  transition: var(--transition);
}

.footer-section ul li a:hover {
  color: var(--accent);
  padding-left: 5px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  margin-bottom: 0.25rem;
}

.footer-contact .icon {
  font-size: 0.85rem;
  flex-shrink: 0;
}

.newsletter-form {
  display: flex;
  gap: 4px;
  margin-top: 0.35rem;
}

.newsletter-form input {
  flex: 1;
  padding: 5px 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-white);
  font-size: 0.75rem;
}

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

.newsletter-form input:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.15);
}

.newsletter-form button {
  padding: 5px 12px;
  background: var(--accent);
  color: var(--text-white);
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.75rem;
  white-space: nowrap;
}

.newsletter-form button:hover {
  background: var(--accent-dark);
}

.social-links {
  display: flex;
  gap: 6px;
  margin-top: 0.35rem;
}

.social-links a {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.75);
  transition: var(--transition);
}

.social-links a svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.social-links a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--color-text-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold);
}

.footer-bottom {
  padding: var(--spacing-sm) 0;
  text-align: center;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom span {
  color: var(--accent);
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  transition: var(--transition);
  background: var(--color-surface-light);
  color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(78, 168, 222, 0.22);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

/* ===== Alerts / Notifications (dark glass) ===== */
.alert {
  padding: 15px 20px;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--glass-background);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: var(--text-primary);
  border: 1px solid var(--border-soft);
  border-left: 4px solid var(--color-blue);
}

.alert-success { border-left-color: var(--color-success); }
.alert-error   { border-left-color: var(--color-danger); }
.alert-info    { border-left-color: var(--color-blue); }

/* ===== Loading Spinner ===== */
.spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-accent { color: var(--accent); }
.text-secondary { color: var(--secondary); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }
.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }

/* =====================================================================
   ============  DESIGN SYSTEM: typography, panels, utilities  =========
   Reusable classes for the new BookMart visual language. Opt-in — they
   don't override existing markup, so no page layout changes unless used.
   ===================================================================== */

/* ---------- Reusable typography (responsive via clamp) ---------- */
.u-title-page {            /* main page / hero titles */
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2rem, 5vw + 0.5rem, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}
.u-title-section {         /* section headings */
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.5vw + 0.5rem, 2.25rem);
  line-height: 1.2;
  color: var(--color-text-primary);
}
.u-title-card {            /* card / product titles */
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.05rem, 1vw + 0.6rem, 1.35rem);
  line-height: 1.3;
  color: var(--color-text-primary);
}
.u-text-body {             /* body copy */
  font-family: var(--font-primary);
  font-size: clamp(0.95rem, 0.3vw + 0.9rem, 1.05rem);
  line-height: 1.7;
  color: var(--color-text-secondary);
}
.u-label {                 /* small overline labels */
  font-family: var(--font-primary);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-blue-light);
}
.u-price {                 /* prices */
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: clamp(1.1rem, 1vw + 0.8rem, 1.4rem);
  color: var(--color-gold);
}
.u-btn-text {              /* button typography */
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}
.u-form-label {            /* form field labels */
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-primary);
}
.u-help-text {             /* helper / hint text */
  font-family: var(--font-primary);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}
.u-gradient-text {         /* accent gradient headline */
  background: linear-gradient(100deg, var(--color-gold), var(--color-blue-light));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Glass panels & surfaces ---------- */
.glass-panel {
  background: var(--glass-background);
  -webkit-backdrop-filter: saturate(150%) blur(16px);
  backdrop-filter: saturate(150%) blur(16px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.glass-panel-light {
  background: var(--glass-background-light);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
}
.surface-card {
  background: var(--color-surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.section-pad { padding: var(--space-3xl) 0; }

/* ---------- Reusable badges (pill) ---------- */
.u-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  padding: 0.3em 0.75em;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  background: var(--glass-background-light);
  color: var(--color-text-primary);
  border: 1px solid var(--border-soft);
}
.u-badge-gold    { background: rgba(244,185,66,0.15); color: var(--color-gold-hover);  border-color: rgba(244,185,66,0.4); }
.u-badge-blue    { background: rgba(78,168,222,0.15); color: var(--color-blue-light);  border-color: rgba(78,168,222,0.4); }
.u-badge-success { background: rgba(47,191,113,0.15); color: var(--color-success);     border-color: rgba(47,191,113,0.4); }
.u-badge-danger  { background: rgba(232,93,117,0.15); color: var(--color-danger);      border-color: rgba(232,93,117,0.4); }

/* ---------- Layout / spacing utilities (new scale) ---------- */
.u-container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-lg); }
.u-flex   { display: flex; }
.u-grid   { display: grid; }
.u-center { display: flex; align-items: center; justify-content: center; }
.u-gap-sm { gap: var(--space-sm); }
.u-gap-md { gap: var(--space-md); }
.u-gap-lg { gap: var(--space-lg); }
.u-stack  { display: flex; flex-direction: column; gap: var(--space-md); }
.u-muted  { color: var(--color-text-secondary); }
.u-glow-gold { box-shadow: var(--shadow-gold); }
.u-glow-blue { box-shadow: var(--shadow-glow); }
.u-rounded { border-radius: var(--radius-lg); }
.u-pill    { border-radius: var(--radius-pill); }
.sr-only {  /* visually hidden but available to screen readers */
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- Global accessibility & polish ---------- */
:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
  border-radius: 3px;
}
::selection { background: rgba(244, 185, 66, 0.35); color: var(--color-text-primary); }

/* Dark, subtle scrollbar */
* { scrollbar-color: var(--color-surface-light) transparent; }
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: var(--color-background-secondary); }
::-webkit-scrollbar-thumb {
  background: var(--color-surface-light);
  border-radius: var(--radius-pill);
  border: 3px solid var(--color-background-secondary);
}
::-webkit-scrollbar-thumb:hover { background: #26415f; }

/* ===== Responsive ===== */