/* ===== Tokens ===== */
:root {
  --paper: #F2F4F3;
  --surface: #FFFFFF;
  --ink: #16233B;
  --muted: #5A6577;
  --line: #D8DDE2;
  --accent: #0F6E5E;
  --accent-ink: #FFFFFF;
  --hero: #16233B;
  --hero-ink: #F2F4F3;
  --mark: #F4D58D;

  --font-ui: "Anuphan", "Noto Sans Thai", system-ui, sans-serif;
  --font-book: "Noto Serif Thai", "Sarabun", Georgia, serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #10161F;
    --surface: #18212C;
    --ink: #E6EBF1;
    --muted: #9AA6B6;
    --line: #2B3542;
    --accent: #3DB39A;
    --accent-ink: #062520;
    --hero: #0E1726;
    --mark: #7A6220;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.65 var(--font-ui);
}
button, input, select { font: inherit; color: inherit; }
.wrap { width: min(1200px, 100%); margin-inline: auto; padding-inline: 20px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
mark { background: var(--mark); color: inherit; border-radius: 2px; padding: 0 1px; }

/* ===== Hero ===== */
.hero { background: var(--hero); color: var(--hero-ink); padding: 22px 0 36px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: inherit; text-decoration: none; font-weight: 600; opacity: .9;
}
.hero h1 {
  font-family: var(--font-book);
  font-weight: 700;
  font-size: clamp(1.9rem, 4.6vw, 3.1rem);
  line-height: 1.3;
  margin: 44px 0 6px;
  max-width: 18em;
}
.lede { margin: 0 0 24px; color: color-mix(in srgb, var(--hero-ink) 72%, transparent); }

.search {
  display: flex; align-items: center; gap: 10px;
  background: #fff; color: #16233B;
  border-radius: 14px; padding: 6px 6px 6px 18px;
  max-width: 760px;
  box-shadow: 0 12px 30px -14px rgba(0,0,0,.6);
}
.search:focus-within { outline: 3px solid #7FD1BE; outline-offset: 2px; }
.search-icon { flex: none; color: #5A6577; }
.search input {
  flex: 1; min-width: 0; border: 0; outline: 0; background: none;
  font-size: 1.125rem; padding: 12px 0; color: #16233B;
}
.search input::placeholder { color: #8A94A3; }
.search input::-webkit-search-cancel-button { cursor: pointer; }
.search kbd {
  font: 500 .8rem var(--font-ui); color: #5A6577;
  border: 1px solid #D8DDE2; border-radius: 6px; padding: 1px 8px;
}
.search button {
  border: 0; border-radius: 10px; cursor: pointer;
  background: #0F6E5E; color: #fff; font-weight: 600;
  padding: 12px 22px;
}
.search button:hover { background: #0B5A4C; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; max-width: 900px; }
.chip {
  border: 1px solid color-mix(in srgb, var(--hero-ink) 28%, transparent);
  background: transparent; border-radius: 999px;
  padding: 4px 14px; font-size: .9rem; cursor: pointer;
  color: var(--hero-ink);
}
.chip:hover { border-color: var(--hero-ink); }
.chip[aria-pressed="true"] { background: var(--hero-ink); color: var(--hero); border-color: var(--hero-ink); }
.chip small { opacity: .6; margin-left: 4px; }

/* ===== Toolbar ===== */
.toolbar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 12px 24px; padding: 26px 0 22px;
  border-bottom: 1px solid var(--line); margin-bottom: 28px;
}
.result-info { margin: 0; color: var(--muted); }
.result-info strong { color: var(--ink); font-weight: 600; }
.link-btn {
  border: 0; background: none; padding: 0; margin-left: 10px; cursor: pointer;
  color: var(--accent); font-weight: 500; text-decoration: underline; text-underline-offset: 3px;
}
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; }
.controls label { display: flex; align-items: center; gap: 8px; font-size: .9rem; color: var(--muted); }
.controls select {
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px;
  padding: 6px 10px; color: var(--ink);
}
.view-toggle { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.view-toggle button {
  border: 0; background: var(--surface); padding: 7px 10px; cursor: pointer; color: var(--muted);
  display: grid; place-items: center;
}
.view-toggle button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

/* ===== Shelf (grid) ===== */
.shelf {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(156px, 1fr));
  gap: 36px 22px;
}
.book {
  width: 100%; border: 0; background: none; padding: 0; cursor: pointer; text-align: left;
  display: grid; gap: 4px; align-content: start;
}
.b-title {
  font-weight: 600; line-height: 1.45; margin-top: 10px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.b-meta, .b-year { font-size: .875rem; color: var(--muted); }
.b-meta { display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.b-extra { display: none; }

/* ===== Generated cover: color = subject, motif = title ===== */
.cover {
  --cloth: hsl(210 30% 30%);
  position: relative; overflow: hidden;
  aspect-ratio: 2 / 3;
  container-type: inline-size;
  background: var(--cloth);
  color: #fff;
  border-radius: 3px 8px 8px 3px;
  padding: 16% 12% 12% 17%;
  display: flex; flex-direction: column;
  box-shadow:
    inset 7px 0 0 rgba(0,0,0,.22),
    inset 8px 0 0 rgba(255,255,255,.10),
    0 1px 2px rgba(22,35,59,.25),
    0 14px 22px -14px rgba(22,35,59,.55);
  transition: transform .2s ease, box-shadow .2s ease;
}
.cover::before { content: ""; position: absolute; inset: 0; pointer-events: none; }
.cover[data-pattern="0"]::before {
  background: linear-gradient(transparent 70%, rgba(255,255,255,.16) 70% 74%, transparent 74% 76%, rgba(255,255,255,.16) 76% 77%, transparent 77%);
}
.cover[data-pattern="1"]::before { inset: 7% 7% 7% 13%; border: 1px solid rgba(255,255,255,.4); border-radius: 2px; }
.cover[data-pattern="2"]::before { background: radial-gradient(circle at 74% 82%, rgba(255,255,255,.17) 0 17%, transparent 17.5%); }
.cover[data-pattern="3"]::before {
  background: repeating-linear-gradient(90deg, rgba(255,255,255,.09) 0 1px, transparent 1px 7px) left bottom / 100% 26% no-repeat;
}
.c-title {
  position: relative;
  font-family: var(--font-book); font-weight: 600;
  font-size: 15px; font-size: clamp(11px, 10.5cqi, 26px);
  line-height: 1.35;
  display: -webkit-box; -webkit-line-clamp: 6; -webkit-box-orient: vertical; overflow: hidden;
  text-wrap: balance;
}
.c-author {
  position: relative; margin-top: auto;
  font-size: 11px; font-size: clamp(9px, 7cqi, 15px);
  opacity: .82; line-height: 1.3;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.book:hover .cover, .book:focus-visible .cover {
  transform: translateY(-4px);
  box-shadow: inset 7px 0 0 rgba(0,0,0,.22), inset 8px 0 0 rgba(255,255,255,.10),
              0 2px 4px rgba(22,35,59,.2), 0 22px 30px -16px rgba(22,35,59,.6);
}
.book:focus-visible { outline: none; }
.book:focus-visible .cover { outline: 3px solid var(--accent); outline-offset: 3px; }
.badge-offline {
  position: absolute; right: 8px; top: 8px; z-index: 1;
  font-size: 11px; background: rgba(0,0,0,.5); color: #fff; border-radius: 4px; padding: 0 6px;
}

/* ===== List view ===== */
.shelf.is-list { grid-template-columns: 1fr; gap: 0; }
.shelf.is-list li { border-bottom: 1px solid var(--line); }
.shelf.is-list .book {
  grid-template-columns: 76px 1fr; grid-template-rows: auto auto auto 1fr;
  column-gap: 20px; padding: 16px 0;
}
.shelf.is-list .cover { grid-row: 1 / -1; padding: 12% 10% 10% 16%; }
.shelf.is-list .c-author { display: none; }
.shelf.is-list .b-title { margin-top: 0; font-size: 1.05rem; }
.shelf.is-list .b-extra { display: block; font-size: .875rem; color: var(--muted); }
.shelf.is-list .book:hover .cover { transform: none; }
.shelf.is-list .book:hover .b-title { color: var(--accent); }

/* ===== States ===== */
.skeleton .cover { background: var(--line); box-shadow: none; animation: pulse 1.2s ease-in-out infinite; }
.skeleton .bar { height: 12px; background: var(--line); border-radius: 4px; margin-top: 10px; width: 80%; }
.skeleton .bar + .bar { width: 50%; margin-top: 8px; }
@keyframes pulse { 50% { opacity: .5; } }

.empty {
  grid-column: 1 / -1; text-align: center; padding: 56px 20px; color: var(--muted);
}
.empty h2 { font-family: var(--font-book); color: var(--ink); font-size: 1.4rem; margin: 0 0 6px; }
.empty p { margin: 0 auto 18px; max-width: 32em; }

.more { display: flex; justify-content: center; padding: 44px 0 72px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  border-radius: 10px; padding: 10px 20px; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn[aria-disabled="true"] { opacity: .55; pointer-events: none; }

/* ===== Detail drawer ===== */
.drawer {
  margin: 0 0 0 auto; padding: 0; border: 0;
  width: min(540px, 100%); height: 100dvh; max-height: 100dvh; max-width: 100%;
  background: var(--surface); color: var(--ink);
  overflow-y: auto; overscroll-behavior: contain;
}
.drawer::backdrop { background: rgba(10, 16, 26, .55); }
.drawer[open] { animation: slide-in .28s cubic-bezier(.2,.8,.2,1); }
@keyframes slide-in { from { transform: translateX(40px); opacity: 0; } }
.close {
  position: sticky; top: 12px; float: right; margin: 12px 12px 0 0; z-index: 2;
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--surface); cursor: pointer; display: grid; place-items: center;
}
.d-head { display: grid; grid-template-columns: 150px 1fr; gap: 22px; padding: 32px 28px 8px; align-items: end; }
.d-head .cover { box-shadow: inset 7px 0 0 rgba(0,0,0,.22), 0 18px 30px -16px rgba(22,35,59,.7); }
.d-title { font-family: var(--font-book); font-size: 1.5rem; line-height: 1.4; margin: 0; }
.d-sub { margin: 6px 0 0; color: var(--muted); }
.d-meta { margin: 0; padding: 20px 28px 8px; display: grid; grid-template-columns: 7.5em 1fr; gap: 10px 16px; }
.d-meta dt { color: var(--muted); font-size: .9rem; }
.d-meta dd { margin: 0; overflow-wrap: anywhere; }
.d-meta .link-btn { margin: 0; text-align: left; }
.d-actions {
  position: sticky; bottom: 0;
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  padding: 18px 28px 22px; background: var(--surface); border-top: 1px solid var(--line); margin-top: 20px;
}
.d-actions .btn.primary { flex: 1 1 200px; padding-block: 13px; font-size: 1.05rem; }
.d-note { width: 100%; margin: 0; font-size: .85rem; color: var(--muted); }

.notice-page { padding: 18vh 20px; max-width: 640px; }
.notice-page h1 { font-family: var(--font-book); }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .hero h1 { margin-top: 28px; }
  .search { padding-left: 14px; }
  .search kbd { display: none; }
  .search button { padding: 12px 16px; }
  .shelf { grid-template-columns: repeat(auto-fill, minmax(128px, 1fr)); gap: 28px 16px; }
  .controls { width: 100%; }
  .d-head { grid-template-columns: 110px 1fr; padding: 24px 20px 4px; gap: 16px; }
  .d-title { font-size: 1.25rem; }
  .d-meta, .d-actions { padding-inline: 20px; }
  .d-meta { grid-template-columns: 6.5em 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}