/* ==========================================================================
   ObsessiveBookNerd.com - Stylesheet
   Theme: Modern Literati & Dark Academia ("Midnight Library")
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..900;1,9..144,300..900&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Color Tokens - Warm Parchment */
  --bg-canvas: #FAF7F2;
  --bg-surface: #FFFFFF;
  --bg-surface-alt: #F4EFE6;
  --bg-elevated: #FFFFFF;
  
  --text-main: #1C1917;
  --text-muted: #666055;
  --text-light: #8C8476;
  
  --accent-burgundy: #8B1E2F;
  --accent-burgundy-hover: #6E1724;
  --accent-burgundy-light: rgba(139, 30, 47, 0.08);
  
  --accent-gold: #C28B23;
  --accent-gold-light: rgba(194, 139, 35, 0.12);
  
  --accent-sage: #22543D;
  --accent-sage-light: rgba(34, 84, 61, 0.1);

  --accent-skip: #991B1B;
  --accent-skip-light: rgba(153, 27, 27, 0.08);

  --border-light: #E7E0D5;
  --border-medium: #D1C7B8;
  
  --shadow-sm: 0 1px 3px rgba(28, 25, 23, 0.05);
  --shadow-md: 0 4px 12px rgba(28, 25, 23, 0.07);
  --shadow-lg: 0 10px 24px rgba(28, 25, 23, 0.09);
  
  /* Typography */
  --font-serif: 'Fraunces', 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, monospace;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  
  --container-max: 1180px;
  --container-narrow: 840px;
}

/* Dark Mode: Midnight Library */
[data-theme="dark"] {
  --bg-canvas: #121110;
  --bg-surface: #1C1A18;
  --bg-surface-alt: #24221F;
  --bg-elevated: #282522;
  
  --text-main: #F4EFE6;
  --text-muted: #A8A29E;
  --text-light: #78716C;
  
  --accent-burgundy: #A8263B;
  --accent-burgundy-hover: #C53049;
  --accent-burgundy-light: rgba(168, 38, 59, 0.2);
  
  --accent-gold: #D4A33B;
  --accent-gold-light: rgba(212, 163, 59, 0.18);
  
  --accent-sage: #38A169;
  --accent-sage-light: rgba(56, 161, 105, 0.2);

  --accent-skip: #EF4444;
  --accent-skip-light: rgba(239, 68, 68, 0.15);

  --border-light: #2E2A26;
  --border-medium: #3E3933;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 28px rgba(0, 0, 0, 0.6);
}

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

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

body {
  background-color: var(--bg-canvas);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 1.0625rem; /* 17px */
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.25s ease, color 0.25s ease;
}

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

a {
  color: var(--accent-burgundy);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover {
  color: var(--accent-burgundy-hover);
  text-decoration-thickness: 2px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 1.875rem; margin-top: 2rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.375rem; margin-top: 1.5rem; margin-bottom: 0.5rem; }

p {
  margin-bottom: 1.25rem;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* Header & Navigation */
.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-main);
}

.brand-link svg {
  height: 44px;
  width: auto;
}

.brand-text-fallback {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.brand-tagline {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent-burgundy);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  text-decoration: none;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-burgundy);
  background-color: var(--bg-surface-alt);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme Toggle Button */
.theme-toggle {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  color: var(--text-main);
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  background: var(--border-light);
  border-color: var(--border-medium);
}

/* Hero Section */
.hero {
  padding: 3.5rem 0 2.5rem;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-canvas) 100%);
  border-bottom: 1px solid var(--border-light);
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-burgundy);
  margin-bottom: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-title {
  font-size: 3.25rem;
  margin-bottom: 1.25rem;
  max-width: 900px;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 780px;
  line-height: 1.6;
  margin-bottom: 2rem;
}

/* Badges & Meta */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  line-height: 1.2;
}

.badge-burgundy {
  background-color: var(--accent-burgundy-light);
  color: var(--accent-burgundy);
  border: 1px solid rgba(139, 30, 47, 0.2);
}

.badge-gold {
  background-color: var(--accent-gold-light);
  color: var(--accent-gold);
  border: 1px solid rgba(194, 139, 35, 0.3);
}

.badge-sage {
  background-color: var(--accent-sage-light);
  color: var(--accent-sage);
  border: 1px solid rgba(34, 84, 61, 0.3);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
}

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

.breadcrumbs .separator {
  color: var(--text-light);
}

/* Grid & Cards */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin: 2.5rem 0;
}

.book-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-medium);
}

.book-card-cover-wrapper {
  aspect-ratio: 2 / 3;
  width: 100%;
  max-width: 180px;
  margin: 0 auto 1.25rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background-color: var(--bg-surface-alt);
  position: relative;
}

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

.book-card:hover .book-card-cover {
  transform: scale(1.03);
}

.book-card-title {
  font-size: 1.35rem;
  margin-bottom: 0.35rem;
}

.book-card-title a {
  color: var(--text-main);
  text-decoration: none;
}

.book-card-title a:hover {
  color: var(--accent-burgundy);
}

.book-card-author {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.book-card-desc {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.book-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 0.85rem;
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* Star Rating */
.star-rating {
  color: var(--accent-gold);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* Editorial Review Page Layout */
.article-header {
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 2.5rem;
}

.review-hero-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  align-items: start;
}

.review-cover-col {
  position: sticky;
  top: 96px;
}

.book-poster {
  aspect-ratio: 2 / 3;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  background: var(--bg-surface-alt);
}

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

.book-quick-specs {
  margin-top: 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.spec-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-light);
  font-size: 0.875rem;
}

.spec-item:last-child {
  border-bottom: none;
}

.spec-label {
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.spec-value {
  font-weight: 600;
  color: var(--text-main);
  text-align: right;
}

/* Reading Experience Meters (Spice & Pacing) */
.meter-card {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
}

.meter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}

.meter-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
}

.meter-score {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-burgundy);
}

.meter-bar-track {
  height: 10px;
  background: var(--border-light);
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}

.meter-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-gold) 0%, var(--accent-burgundy) 100%);
  border-radius: 5px;
  transition: width 0.6s ease;
}

.meter-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.725rem;
  color: var(--text-light);
  margin-top: 0.4rem;
}

/* Spice Level Indicator */
.spice-box {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  margin: 0.5rem 0;
}

.chili-icons {
  letter-spacing: 0.1em;
}

/* Who Should Read vs Who Should Skip Comparison Grid */
.verdict-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 2.5rem 0;
}

.verdict-box {
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.verdict-read {
  background-color: var(--accent-sage-light);
  border: 1px solid rgba(34, 84, 61, 0.3);
}

.verdict-skip {
  background-color: var(--accent-skip-light);
  border: 1px solid rgba(153, 27, 27, 0.25);
}

.verdict-box h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.15rem;
}

.verdict-read h3 {
  color: var(--accent-sage);
}

.verdict-skip h3 {
  color: var(--accent-skip);
}

.verdict-box ul {
  padding-left: 1.25rem;
  font-size: 0.95rem;
  line-height: 1.6;
}

.verdict-box li {
  margin-bottom: 0.5rem;
}

/* Prose & Review Content */
.prose {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text-main);
}

.prose p:first-of-type::first-letter {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  line-height: 0.8;
  float: left;
  margin: 0.15rem 0.5rem 0 0;
  color: var(--accent-burgundy);
  font-weight: 700;
}

.prose blockquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.25rem;
  line-height: 1.6;
  border-left: 4px solid var(--accent-burgundy);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  background: var(--bg-surface-alt);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.prose blockquote footer {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-style: normal;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Tier List Badges */
.tier-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.1rem;
  width: 38px;
  height: 38px;
  line-height: 38px;
  text-align: center;
  border-radius: var(--radius-sm);
  color: #FFFFFF;
}

.tier-s { background: #E11D48; }
.tier-a { background: #EA580C; }
.tier-b { background: #D97706; }
.tier-c { background: #4B5563; }

/* Interactive Checklist (Series Reading Order) */
.series-tracker {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-md);
}

.series-tracker-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-light);
}

.progress-counter {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-burgundy);
}

.series-book-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.series-book-item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  transition: all 0.2s ease;
}

.series-book-item.completed {
  opacity: 0.7;
  background: var(--bg-canvas);
}

.series-book-item.completed .book-item-title {
  text-decoration: line-through;
}

.series-checkbox {
  width: 22px;
  height: 22px;
  accent-color: var(--accent-burgundy);
  cursor: pointer;
  flex-shrink: 0;
}

.book-item-thumb {
  width: 48px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.book-item-info {
  flex-grow: 1;
}

.book-item-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-burgundy);
  font-weight: 600;
  text-transform: uppercase;
}

.book-item-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0.15rem 0;
}

.book-item-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Tools Interactive UI */
.tool-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-md);
}

.tool-form-group {
  margin-bottom: 1.5rem;
}

.tool-label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}

.tool-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  background: var(--bg-canvas);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  transition: border-color 0.2s ease;
}

.tool-input:focus {
  outline: none;
  border-color: var(--accent-burgundy);
  box-shadow: 0 0 0 3px var(--accent-burgundy-light);
}

.tool-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.preset-chip {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 0.35rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.785rem;
  cursor: pointer;
  color: var(--text-main);
  transition: all 0.15s ease;
}

.preset-chip:hover, .preset-chip.active {
  background: var(--accent-burgundy);
  color: #FFFFFF;
  border-color: var(--accent-burgundy);
}

.tool-btn {
  background-color: var(--accent-burgundy);
  color: #FFFFFF;
  border: none;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.tool-btn:hover {
  background-color: var(--accent-burgundy-hover);
  transform: translateY(-1px);
}

.tool-result-box {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin-top: 2rem;
}

.result-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.stat-item {
  text-align: center;
  padding: 1rem;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent-burgundy);
  line-height: 1.1;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 0.25rem;
  letter-spacing: 0.05em;
}

/* Author Box */
.author-card {
  display: flex;
  gap: 2rem;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 3rem 0;
}

.author-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent-gold);
  flex-shrink: 0;
}

.author-info h3 {
  margin-top: 0;
  margin-bottom: 0.35rem;
}

.author-role {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-burgundy);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

/* Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-light);
  padding: 4rem 0 2.5rem;
  margin-top: 5rem;
  transition: background-color 0.25s ease;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: var(--accent-burgundy);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.85rem;
  color: var(--text-light);
}

/* Callouts / Alerts */
.callout {
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  border-left: 4px solid;
}

.callout-info {
  background: var(--bg-surface-alt);
  border-color: var(--accent-burgundy);
}

.callout-gold {
  background: var(--accent-gold-light);
  border-color: var(--accent-gold);
}

/* ==========================================================================
   Phase 2 SEO & Engagement Upgrades
   ========================================================================== */

/* FAQ Accordion Section */
.faq-section {
  margin: 3.5rem 0;
  border-top: 1px solid var(--border-light);
  padding-top: 2.5rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item[open] {
  border-color: var(--accent-burgundy);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  padding: 1.15rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--accent-burgundy);
  font-weight: 400;
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
  content: '−';
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-main);
  border-top: 1px dashed var(--border-light);
  margin-top: 0.5rem;
  padding-top: 1rem;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* Audiobook Critique Box */
.audiobook-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-sm);
}

.audiobook-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-light);
}

.audio-spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
  background: var(--bg-surface-alt);
  padding: 1rem;
  border-radius: var(--radius-sm);
}

/* Content & Spice Advisories Box */
.advisory-box {
  background: var(--bg-surface-alt);
  border-left: 4px solid var(--accent-gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.5rem;
  margin: 2rem 0;
}

.advisory-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

/* Read-Alike Book Recommendations */
.read-alikes-section {
  margin: 3.5rem 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
}

.read-alikes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.read-alike-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.read-alike-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Responsive */
@media (max-width: 900px) {
  .review-hero-grid {
    grid-template-columns: 1fr;
  }
  .review-cover-col {
    position: static;
    max-width: 260px;
    margin: 0 auto;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero-title {
    font-size: 2.25rem;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none; /* Can toggle via mobile menu */
  }
  .verdict-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .author-card {
    flex-direction: column;
    text-align: center;
  }
}

/* Reviews Real-Time Filter & Search UI */
.filter-btn {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.8rem;
  font-size: 0.82rem;
  font-family: var(--font-sans);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}
.filter-btn:hover {
  border-color: var(--border-dark);
  color: var(--text-main);
}
.filter-btn.active {
  background: var(--accent-burgundy);
  color: #ffffff !important;
  border-color: var(--accent-burgundy);
  font-weight: 600;
}