/* Library Page Styles - Foundational Texts Collection */

:root {
  /* Color Palette - Warm, literary aesthetic */
  --color-paper: #faf8f5;
  --color-paper-dark: #f0ebe4;
  --color-ink: #2c2420;
  --color-ink-light: #5c524a;
  --color-gold: #b8860b;
  --color-gold-light: #d4a942;
  --color-burgundy: #722f37;
  --color-owned: #4a6741;
  --color-owned-light: #6b8c5e;
  --color-to-buy: #8b6914;

  /* Typography */
  --font-display: 'IM Fell Double Pica', Georgia, serif;
  --font-body: 'Cormorant Garamond', Garamond, serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;

  /* Timeline */
  --timeline-width: 40px;

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

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-paper);
  min-height: 100vh;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(to bottom, var(--color-paper) 60%, transparent);
  z-index: 100;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-ink-light);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-burgundy);
}

.nav-link::before {
  content: '\2190'; /* Left arrow */
  font-size: 1.2em;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: calc(var(--space-2xl) + 60px) var(--space-lg) var(--space-xl);
  max-width: 800px;
  margin: 0 auto;
}

.hero-ornament {
  font-size: 2rem;
  color: var(--color-gold);
  margin-bottom: var(--space-md);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
  letter-spacing: 0.02em;
}

.hero-subtitle {
  font-size: 1.25rem;
  font-style: italic;
  color: var(--color-ink-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Horizontal Timeline Section - Hidden on mobile */
.timeline-section {
  display: none;
  padding: var(--space-lg) var(--space-lg);
  margin-bottom: var(--space-xl);
  overflow-x: auto;
}

@media (min-width: 768px) {
  .timeline-section {
    display: block;
  }
}

.timeline-container {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.timeline-eras {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
  padding: 0 var(--space-md);
  min-width: 800px;
}

.timeline-era {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-ink-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.timeline-track {
  position: relative;
  height: 60px;
  background: linear-gradient(to right, var(--color-paper-dark), var(--color-gold-light), var(--color-paper-dark));
  border-radius: 4px;
  min-width: 800px;
}

.timeline-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-ink-light);
  transform: translateY(-50%);
}

.timeline-marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--color-ink);
  background: var(--color-paper);
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 1;
}

.timeline-marker:hover {
  transform: translate(-50%, -50%) scale(1.3);
  box-shadow: 0 0 0 4px rgba(184, 134, 11, 0.3);
}

.timeline-marker.owned {
  background: var(--color-owned);
  border-color: var(--color-owned);
}

.timeline-marker.to-buy {
  background: var(--color-paper);
  border-color: var(--color-to-buy);
}

.timeline-marker-label {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 8px;
  font-size: 0.7rem;
  white-space: nowrap;
  color: var(--color-ink-light);
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.timeline-marker:hover .timeline-marker-label {
  opacity: 1;
}

.timeline-dates {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-sm);
  padding: 0 var(--space-md);
  font-size: 0.85rem;
  color: var(--color-ink-light);
  min-width: 800px;
}

/* Main Content */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-2xl);
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
}

.section-ornament {
  color: var(--color-gold);
  font-size: 1.5rem;
}

/* Book List with Vertical Timeline (Mobile) */
.book-list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
  padding-left: var(--timeline-width);
}

/* Vertical timeline line */
.book-list::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-gold-light), var(--color-ink-light));
}

/* Book Card with Timeline Marker */
.book-item {
  position: relative;
}

/* Timeline marker for each book */
.book-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--timeline-width) + 12px);
  top: 40px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 3px solid var(--color-to-buy);
  background: var(--color-paper);
  z-index: 2;
}

.book-item.owned::before {
  background: var(--color-owned);
  border-color: var(--color-owned);
}

/* Date label to the left of timeline marker */
.book-item::after {
  content: attr(data-date);
  position: absolute;
  right: calc(100% + var(--timeline-width) - 8px);
  top: 44px;
  font-size: 0.5rem;
  color: var(--color-ink-light);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  text-align: right;
  white-space: nowrap;
}

/* Desktop: Grid layout without vertical timeline */
@media (min-width: 768px) {
  .book-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    padding-left: 0;
  }

  .book-list::before {
    display: none;
  }

  .book-item::before,
  .book-item::after {
    display: none;
  }
}

@media (min-width: 1024px) {
  .book-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Book Card */
.book-card {
  background: #fff;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(44, 36, 32, 0.1);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(44, 36, 32, 0.15);
}

.book-card.owned {
  border-left: 4px solid var(--color-owned);
}

.book-card.to-buy {
  border-left: 4px solid var(--color-to-buy);
}

.book-cover {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--color-paper-dark);
}

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

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

.book-cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  text-align: center;
  background: linear-gradient(135deg, var(--color-burgundy) 0%, #4a2025 100%);
  color: var(--color-gold-light);
}

.book-cover-placeholder .title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.book-cover-placeholder .author {
  font-style: italic;
  font-size: 1rem;
  opacity: 0.9;
}

.book-status {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 3px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.book-status.owned {
  background: var(--color-owned);
  color: #fff;
}

.book-status.to-buy {
  background: var(--color-to-buy);
  color: #fff;
}

.book-content {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.book-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-xs);
}

.book-meta {
  font-size: 0.95rem;
  color: var(--color-ink-light);
  margin-bottom: var(--space-md);
}

.book-author {
  font-style: italic;
}

.book-date {
  font-size: 0.85rem;
}

.book-date::before {
  content: ' \00B7 '; /* Middle dot */
}

.book-description {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-ink);
  flex: 1;
}

.book-footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-paper-dark);
}

.book-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-burgundy);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.book-link:hover {
  color: var(--color-gold);
}

.book-link::after {
  content: '\2192'; /* Right arrow */
  transition: transform var(--transition-fast);
}

.book-link:hover::after {
  transform: translateX(4px);
}

.book-owned-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9rem;
  color: var(--color-owned);
  font-weight: 500;
}

.book-owned-badge::before {
  content: '\2713'; /* Checkmark */
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--color-paper-dark);
}

.footer-ornament {
  font-size: 1.5rem;
  color: var(--color-gold);
  margin-bottom: var(--space-md);
}

.footer-link {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-ink-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-burgundy);
}

/* Divider */
.divider {
  text-align: center;
  margin: var(--space-2xl) 0;
  color: var(--color-gold);
  font-size: 1.5rem;
}

/* Mobile: adjust divider for timeline */
@media (max-width: 767px) {
  .divider {
    margin-left: calc(-1 * var(--timeline-width));
    padding-left: var(--timeline-width);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print styles */
@media print {
  .nav, .timeline-section {
    display: none;
  }

  .book-list {
    padding-left: 0;
  }

  .book-list::before,
  .book-item::before,
  .book-item::after {
    display: none;
  }

  .book-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}