/* Kệ sách, bìa sách, trang giới thiệu quyển và mục lục */

/* Bìa vẽ bằng CSS, màu lấy từ --cover của từng quyển */
.cover {
  position: relative; flex: none;
  display: flex; flex-direction: column; justify-content: flex-end; gap: 6px;
  aspect-ratio: 2 / 3; padding: 16px 14px 14px 20px; overflow: hidden;
  border-radius: 6px 12px 12px 6px; color: #fdf8ec;
  background:
    radial-gradient(circle at 78% 22%, rgb(255 255 255 / 18%) 0 18%, transparent 19%),
    linear-gradient(160deg, color-mix(in srgb, var(--cover) 82%, #fff) 0%, var(--cover) 45%, color-mix(in srgb, var(--cover) 70%, #000) 100%);
  box-shadow: inset 6px 0 0 rgb(0 0 0 / 18%), inset 8px 0 0 rgb(255 255 255 / 10%), var(--shadow);
}
.cover-mark { position: absolute; top: 12%; right: 14%; font-size: 2.2em; color: #f6d27a; line-height: 1; }
.cover-title { font-family: var(--serif); font-weight: 700; line-height: 1.15; text-wrap: balance; }
.cover-author { font-size: .72em; letter-spacing: .12em; text-transform: uppercase; opacity: .85; }
/* Bìa bằng ảnh thật: giữ gáy sách và bóng đổ như bìa CSS */
.cover-photo { padding: 0; background: #fff; }
.cover-photo img { display: block; width: 100%; height: 100%; object-fit: cover; border-radius: inherit; }
.cover-photo::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  box-shadow: inset 6px 0 0 rgb(0 0 0 / 10%), inset 8px 0 0 rgb(255 255 255 / 25%);
}
.cover-md { width: 128px; font-size: 15px; }
.cover-lg { width: min(220px, 52vw); font-size: 22px; }

/* Kệ sách */
.shelf-grid { display: grid; gap: 16px; margin-top: 12px; grid-template-columns: 1fr; }
@media (min-width: 820px) { .shelf-grid { grid-template-columns: 1fr 1fr; } }
.shelf-card {
  display: flex; gap: 16px; padding: 16px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.shelf-cover-link { text-decoration: none; }
.shelf-info { min-width: 0; flex: 1; }
.shelf-info h2 { margin: 0 0 4px; font-size: 21px; }
.shelf-info h2 a { color: var(--ink); text-decoration: none; }
.shelf-info p { margin: 0; }
.shelf-tagline { margin: 8px 0 0 !important; font-size: 15px; }
.shelf-info .btn { margin-top: 10px; }
.fav-link {
  display: inline-flex; gap: 8px; align-items: center; margin-top: 20px;
  padding: 10px 16px; border-radius: 999px; border: 1px dashed var(--line);
  color: var(--ink); text-decoration: none; font-weight: 600;
}
.fav-link b { color: var(--gold); }
@media (max-width: 420px) {
  .shelf-card { flex-direction: column; align-items: center; text-align: center; }
  .shelf-info { width: 100%; }
}

/* Trang giới thiệu quyển */
.book-hero { display: flex; gap: 28px; align-items: flex-start; padding: 24px 0 8px; }
.book-hero-text { min-width: 0; max-width: var(--measure); }
.book-hero-text > p:not(.eyebrow):not(.lead) { color: var(--ink-2); }
@media (max-width: 640px) {
  .book-hero { flex-direction: column; align-items: center; text-align: center; gap: 20px; }
  .stats, .actions { justify-content: center; }
}
.stats { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 16px 0 0; list-style: none; }
.stats li { padding: 6px 12px; border-radius: 999px; background: var(--paper-2); font-size: 14px; }
.stats b { color: var(--accent); }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

.section-title { margin: 36px 0 12px; font-size: 24px; }
.toc { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; max-width: var(--measure); }
.toc a {
  display: grid; grid-template-columns: 96px 1fr 24px; align-items: center; gap: 10px;
  padding: 12px 14px; min-height: 48px; border-radius: 12px;
  background: var(--card); border: 1px solid var(--line);
  color: var(--ink); text-decoration: none;
}
.toc a:hover { border-color: var(--accent); }
.toc-label { font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--gold); }
.toc-title { font-family: var(--serif); font-weight: 600; }
.toc-state { color: var(--accent); font-weight: 700; text-align: right; }
.toc li.done .toc-title { color: var(--ink-2); }
.toc li.current a { border-color: var(--accent); box-shadow: inset 4px 0 0 var(--accent); }
@media (max-width: 420px) {
  .toc a { grid-template-columns: 1fr 20px; }
  .toc-label { grid-column: 1 / -1; }
}
.source { margin-top: 32px; max-width: var(--measure); }