:root {
  color-scheme: light;
  --paper: #f3efe4;
  --card: #fffdf8;
  --ink: #1d1a16;
  --muted: #6f675c;
  --line: #e3d9c6;
  --accent: #8d3b2f;
  --accent-soft: #f6e6e1;
  --ok: #2f6b45;
  --shadow: 0 16px 40px rgba(70, 48, 24, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(141, 59, 47, 0.08), transparent 32rem),
    var(--paper);
  color: var(--ink);
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
}

a { color: inherit; }

button,
.dropzone {
  font: inherit;
}

.topbar,
.reader-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 7vw 8px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

h1, h2 { font-weight: 650; letter-spacing: -0.03em; }

h1 { margin: 0; font-size: 2.4rem; }

.home {
  padding: 12px 7vw 72px;
}

.upload-panel { margin: 12px 0 36px; }

.dropzone {
  display: grid;
  gap: 6px;
  place-items: center;
  min-height: 180px;
  padding: 32px;
  border: 1.5px dashed #c9b79a;
  border-radius: 22px;
  background: rgba(255, 253, 248, 0.72);
  text-align: center;
  cursor: pointer;
}

.dropzone strong { font-size: 1.25rem; }

.dropzone span,
.section-head p,
.meta,
.page-status { color: var(--muted); }

.dropzone input { display: none; }

.dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

#search {
  flex: 1;
  max-width: 320px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  padding: 8px 14px;
  font: inherit;
}

.section-head h2 { margin: 0; }

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.book-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 180px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.book-card { cursor: pointer; }

.book-card h3 {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.35;
}

.book-card h3 a {
  color: inherit;
  text-decoration: none;
}

.card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-top: auto;
}

.status {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 3px 9px;
  background: #efe8da;
  color: #5c5144;
  font-size: 0.82rem;
}

.status.ready,
.status.original { background: #e5f3e8; color: var(--ok); }
.status.failed,
.status.interrupted { background: var(--accent-soft); color: var(--accent); }
.status.translating,
.status.extracting,
.status.queued { background: #efe4c6; color: #6d5420; }

.progress {
  height: 7px;
  overflow: hidden;
  border-radius: 999px;
  background: #efe6d6;
}

.progress span {
  display: block;
  height: 100%;
  background: var(--accent);
}

.resume,
.delete,
.pager button,
.library-pager button,
.settings-actions button,
.model-choices button,
.view-switch button,
#toc-toggle {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  color: var(--ink);
  padding: 7px 12px;
  cursor: pointer;
}

.resume:hover,
.delete:hover,
.pager button:hover,
.library-pager button:hover,
.settings-actions button:hover,
.model-choices button:hover,
.view-switch button:hover,
#toc-toggle:hover { border-color: var(--accent); }

.delete { color: var(--accent); }

.library-pager {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 22px;
}

.library-pager button:disabled { color: #aaa; cursor: default; }

.error {
  color: var(--accent);
  min-height: 1.4em;
}

.empty {
  padding: 28px;
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.7);
  color: var(--muted);
}

.reader-body { min-height: 100vh; }

.reader-bar {
  position: sticky;
  top: 0;
  z-index: 2;
  padding: 16px 4vw;
  background: rgba(243, 239, 228, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
}

.reader-bar h1 {
  flex: 1;
  font-size: 1.15rem;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.back { text-decoration: none; }

.reader-tools,
.view-switch {
  display: flex;
  align-items: center;
  gap: 8px;
}

.view-switch button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.settings-panel {
  margin: 0 0 36px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
}

.settings-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(180px, 0.8fr);
  gap: 12px 16px;
  margin-top: 14px;
}

.settings-grid label,
.think-toggle {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.92rem;
}

.settings-grid input {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: white;
  color: var(--ink);
  padding: 8px 12px;
  font: inherit;
}

.settings-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 14px;
}

.think-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
}

.model-choices {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.model-choices button.current {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.reader-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: calc(100vh - 68px);
}

.toc {
  position: sticky;
  top: 68px;
  align-self: start;
  display: flex;
  flex-direction: column;
  height: calc(100vh - 68px);
  overflow: hidden;
  border-right: 1px solid var(--line);
}

.toc-scroll {
  min-height: 0;
  flex: 1;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 18px 8px 32px 4vw;
}

.toc a {
  display: block;
  padding: 7px 10px;
  border-radius: 10px;
  color: var(--ink);
  text-decoration: none;
  line-height: 1.4;
}

.toc a.active,
.toc a:hover { background: rgba(141, 59, 47, 0.1); }

.reading {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 28px 22px 80px;
}

.content {
  font-family: "Iowan Old Style", Palatino, "Songti SC", "Noto Serif SC", serif;
  font-size: 1.12rem;
  line-height: 1.85;
}

.content h1,
.content h2,
.content h3 { line-height: 1.3; }

.content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.2rem auto;
}

.content pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: 12px;
  background: #fff;
}

.pager {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 36px;
}

.pager button:disabled { color: #aaa; cursor: default; }

@media (max-width: 800px) {
  h1 { font-size: 2rem; }
  .settings-grid { grid-template-columns: 1fr; }
  .reader-bar { flex-wrap: wrap; }
  .reader-layout { grid-template-columns: 1fr; }
  .toc {
    display: none;
    position: fixed;
    z-index: 3;
    inset: 64px 0 0;
    height: auto;
    background: var(--paper);
  }
  .reader-body.toc-open .toc { display: block; }
}