/*
  books.venkateshrao.com — main library index styles
  SACRED: never auto-overwrite. Hand-crafted.
*/

:root {
  --bg:          #fcf9f4;
  --card-bg:     #ffffff;
  --text:        #1c1408;
  --muted:       #7a6a52;
  --accent:      #5c3a10;
  --link:        #5c3a10;
  --link-hover:  #3a2008;
  --border:      #e0d5c0;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ── Header ─────────────────────────────────────── */

.site-header {
  background: #fcf9f4;
  border-bottom: 1px solid var(--border);
}

.site-header-inner {
  max-width: 1020px;
  margin: 0 auto;
  padding: 1rem 1.5rem 1.25rem;
}

.site-header h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.6rem;
  font-weight: normal;
  letter-spacing: 0.03em;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.site-title-link {
  color: #1c1408;
  text-decoration: none;
}

.site-title-link:hover {
  color: var(--accent);
}

/* ── Back link ───────────────────────────────────── */

.back-link-bar {
  padding: 0.75rem 0 1.75rem;
}

.back-link {
  font-family: system-ui, sans-serif;
  font-size: 0.78rem;
  color: var(--muted);
  text-decoration: none;
}

.back-link:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* ── Main ────────────────────────────────────────── */

.main-wrapper {
  max-width: 1020px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  flex: 1;
}

.intro {
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 640px;
}

/* ── Series section ──────────────────────────────── */

.book-series {
  margin-bottom: 3rem;
}

.series-header {
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.series-name {
  font-size: 1.3rem;
  font-weight: bold;
  letter-spacing: 0.02em;
  margin-bottom: 0.25rem;
}

.series-desc {
  font-size: 0.95rem;
  color: var(--muted);
}

.standalone-grid {
  margin-top: 1rem;
}

/* ── Featured Book ───────────────────────────────── */

.featured-section {
  margin-bottom: 2.5rem;
  padding: 1.5rem 1.75rem;
  background: #f0ead8;
  border: 1px solid #d4c9a8;
  border-radius: 3px;
}

.featured-tag {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  font-weight: bold;
  color: var(--accent);
  margin-bottom: 1rem;
}

.featured-book {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  align-items: start;
}

.featured-cover-wrap {
  display: block;
  line-height: 0;
}

.featured-cover-placeholder {
  width: 200px;
  aspect-ratio: 2/3;
  background: var(--border);
}

.featured-cover {
  width: 100%;
  display: block;
  border: 1px solid var(--border);
}

.featured-info {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.featured-title {
  font-size: 1.35rem;
  font-weight: bold;
  line-height: 1.25;
}

.featured-title a {
  color: var(--text);
  text-decoration: none;
}

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

.featured-desc {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
  max-width: 520px;
}

/* ── Catalog sections ────────────────────────────── */

.book-section {
  margin-bottom: 2.5rem;
}

/* ── Catalog header ──────────────────────────────── */

.catalog-header {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  margin-bottom: 1.75rem;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
}

.catalog-title {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
  font-weight: bold;
  color: var(--text);
  white-space: nowrap;
}

/* ── Filter bar ──────────────────────────────────── */

.filter-bar {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.filter-bar label {
  font-family: system-ui, sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.filter-select {
  font-family: system-ui, sans-serif;
  font-size: 0.83rem;
  color: var(--text);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 0.28rem 0.55rem;
  cursor: pointer;
  appearance: auto;
}

.filter-select:focus {
  outline: none;
  border-color: var(--accent);
}

/* ── Book Grid ───────────────────────────────────── */

.book-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}

.book-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.book-cover-link {
  display: block;
  aspect-ratio: 2/3;
  overflow: hidden;
  background: #e8e0d0;
  line-height: 0;
}

.book-cover {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: top;
}

.book-info {
  padding: 0.6rem 0.7rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.book-series-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-family: system-ui, sans-serif;
}

.book-title {
  font-size: 0.88rem;
  font-weight: bold;
  line-height: 1.3;
}

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

.book-title a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.book-desc {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}

.book-links {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  margin-top: 0.25rem;
  flex-wrap: wrap;
}

.read-link {
  font-family: system-ui, sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 2px;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.read-link:hover {
  background: var(--link-hover);
  color: #fff;
}

.buy-link {
  font-family: system-ui, sans-serif;
  font-size: 0.68rem;
  padding: 0.2rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--link);
  text-decoration: none;
  background: var(--card-bg);
  white-space: nowrap;
}

.buy-link:hover {
  background: var(--bg);
  border-color: var(--accent);
  color: var(--link-hover);
}

.edition-soon {
  font-family: system-ui, sans-serif;
  font-size: 0.68rem;
  color: var(--muted);
  opacity: 0.6;
}

/* ── Footer ──────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  font-family: system-ui, sans-serif;
}

/* ── Header link ─────────────────────────────────── */

.site-title-link {
  color: var(--header-fg);
  text-decoration: none;
}

.site-title-link:hover {
  color: var(--header-fg);
  opacity: 0.85;
}

/* ── Breadcrumb ──────────────────────────────────── */

.breadcrumb {
  font-family: system-ui, sans-serif;
  font-size: 0.83rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

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

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

/* ── Series view-all link (catalog) ──────────────── */

.series-view-link {
  font-family: system-ui, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--accent);
  margin-left: 0.85rem;
  letter-spacing: 0.01em;
}

.series-view-link:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

/* ── Book Detail Page ────────────────────────────── */

.book-detail {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: start;
}

.book-detail-cover img {
  width: 100%;
  display: block;
  border: 1px solid var(--border);
}

.book-detail-info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.book-detail-title {
  font-size: 1.8rem;
  font-weight: bold;
  line-height: 1.25;
}

.book-detail-desc {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.65;
  max-width: 540px;
}

.series-back-link {
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

/* ── More in this series (detail page) ──────────── */

.more-in-series {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.more-in-series-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.more-in-series-title {
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ── Series Intro (series home page) ─────────────── */

.series-intro {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.series-intro-name {
  font-size: 1.75rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.series-intro-desc {
  font-size: 1rem;
  color: var(--muted);
}

/* ── Mobile ──────────────────────────────────────── */

@media (max-width: 900px) {
  .book-grid { grid-template-columns: repeat(4, 1fr); }
  .featured-book { grid-template-columns: 160px 1fr; }
}

@media (max-width: 640px) {
  .site-header h1 { font-size: 1.3rem; }
  .book-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .book-detail { grid-template-columns: 1fr; gap: 1.5rem; }
  .book-detail-cover img { max-width: 200px; }
  .book-detail-title { font-size: 1.4rem; }
  .featured-book { grid-template-columns: 110px 1fr; gap: 1rem; }
  .featured-title { font-size: 1.1rem; }
}