/**
 * Book Catalog Styles
 * 
 * Design approach: Editorial/literary magazine aesthetic
 * - Warm, paper-like backgrounds
 * - Strong typography with Libre Baskerville
 * - Generous whitespace
 * - Minimal decoration
 */

/* ==================== */
/* Variables            */
/* ==================== */

:root {
  /* Colors - warm, muted palette */
  --color-bg: #faf8f5;
  --color-bg-alt: #f3f0eb;
  --color-text: #2c2c2c;
  --color-text-muted: #6b6b6b;
  --color-text-light: #8a8a8a;
  --color-accent: #8b4513;       /* Saddle brown - warm accent */
  --color-accent-light: #d4a574;
  --color-border: #e5e0d8;
  --color-recommended: #c9a227;  /* Gold for recommendations */
  
  /* Typography */
  --font-body: 'Libre Baskerville', Georgia, serif;
  --font-ui: 'Source Sans 3', -apple-system, sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  
  /* Layout */
  --max-width: 1200px;
  --content-width: 720px;
}


/* ==================== */
/* Reset & Base         */
/* ==================== */

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3, h4 {
  font-family: var(--font-body);
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 var(--space-md);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.1rem; }

p {
  margin: 0 0 var(--space-md);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

button {
  font-family: var(--font-ui);
}


/* ==================== */
/* Layout               */
/* ==================== */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}


/* ==================== */
/* Header               */
/* ==================== */

.site-header {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.site-title {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 400;
  font-style: italic;
  color: var(--color-text);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: var(--space-lg);
}

.site-nav a {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.site-nav a:hover {
  color: var(--color-text);
}


/* ==================== */
/* Main Content         */
/* ==================== */

.site-main {
  padding: var(--space-xl) 0;
  min-height: 60vh;
}

.page-header {
  margin-bottom: var(--space-xl);
  max-width: var(--content-width);
}

.page-header h1 {
  margin-bottom: var(--space-sm);
}

.page-intro {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  font-style: italic;
}


/* ==================== */
/* Catalog Controls     */
/* ==================== */

.catalog-controls {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.search-box {
  margin-bottom: var(--space-md);
}

.search-input {
  width: 100%;
  max-width: 400px;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-ui);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: white;
  transition: border-color 0.2s;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.theme-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.theme-filter {
  padding: var(--space-xs) var(--space-md);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s;
}

.theme-filter:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.theme-filter.active {
  background: var(--color-text);
  border-color: var(--color-text);
  color: white;
}

.theme-count {
  opacity: 0.6;
}

.results-count {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}


/* ==================== */
/* Book Grid            */
/* ==================== */

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .book-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-xl);
  }
}


/* ==================== */
/* Book Card            */
/* ==================== */

.book-card {
  position: relative;
}

.book-card__link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.book-card__cover {
  position: relative;
  aspect-ratio: 2/3;
  margin-bottom: var(--space-md);
  background: var(--color-bg-alt);
  border-radius: 2px;
  overflow: hidden;
  box-shadow: 
    0 2px 4px rgba(0,0,0,0.05),
    0 4px 12px rgba(0,0,0,0.08);
  transition: transform 0.2s, box-shadow 0.2s;
}

.book-card__link:hover .book-card__cover {
  transform: translateY(-4px);
  box-shadow: 
    0 4px 8px rgba(0,0,0,0.08),
    0 8px 24px rgba(0,0,0,0.12);
}

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

.book-card__placeholder {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  padding: var(--space-md);
  text-align: center;
  background: linear-gradient(145deg, var(--color-bg-alt) 0%, #e8e4dc 100%);
}

.book-card__placeholder-title {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text-muted);
}

.book-card__badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-recommended);
  color: white;
  border-radius: 50%;
  font-size: 0.9rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.book-card__info {
  padding: 0 var(--space-xs);
}

.book-card__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  line-height: 1.3;
}

.book-card__author {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}

.book-card__translator {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.book-card__year {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin: var(--space-xs) 0 0;
}


/* ==================== */
/* Book Detail Page     */
/* ==================== */

.book-detail {
  max-width: 900px;
}

.back-link {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.book-detail__layout {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 640px) {
  .book-detail__layout {
    grid-template-columns: 240px 1fr;
  }
}

.book-detail__cover {
  position: relative;
}

.book-detail__cover img,
.book-detail__cover .book-cover--large {
  width: 100%;
  max-width: 240px;
  aspect-ratio: 2/3;
  object-fit: cover;
  border-radius: 2px;
  box-shadow: 
    0 4px 8px rgba(0,0,0,0.1),
    0 8px 24px rgba(0,0,0,0.15);
}

.book-detail__recommended {
  margin-top: var(--space-md);
}

.recommended-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--color-recommended);
  border: 1px solid var(--color-recommended);
  border-radius: 4px;
}

.book-detail__header {
  margin-bottom: var(--space-lg);
}

.book-detail__title {
  font-size: 1.75rem;
  margin-bottom: var(--space-xs);
}

.book-detail__subtitle {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.book-detail__author {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin: 0;
}

.book-detail__translator {
  font-size: 0.95rem;
  color: var(--color-text-light);
}

.book-detail__meta {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-bg-alt);
  border-radius: 4px;
}

.meta-item {
  margin: 0;
}

.meta-item dt {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.meta-item dd {
  font-size: 0.95rem;
  margin: 0;
}

.book-detail__themes {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.theme-tag {
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border-radius: 4px;
}

.theme-tag:hover {
  color: var(--color-accent);
  background: var(--color-border);
}

.book-detail__summary,
.book-detail__notes,
.book-detail__links {
  margin-bottom: var(--space-lg);
}

.book-detail__summary h2,
.book-detail__notes h2,
.book-detail__links h2 {
  font-size: 0.85rem;
  font-family: var(--font-ui);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.links-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.links-list li {
  margin-bottom: var(--space-sm);
}

.link-type {
  font-size: 0.8rem;
  color: var(--color-text-light);
}


/* ==================== */
/* Empty State          */
/* ==================== */

.empty-state {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-muted);
  font-style: italic;
}


/* ==================== */
/* Footer               */
/* ==================== */

.site-footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-xl);
}

.site-footer p {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin: 0;
}


/* ==================== */
/* Placeholder Cover    */
/* ==================== */

.book-cover--placeholder {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--space-lg);
  background: linear-gradient(145deg, #e8e4dc 0%, #d8d4cc 100%);
}

.book-cover--placeholder .book-cover__title {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.book-cover--placeholder .book-cover__author {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--color-text-light);
}