/* =============================================================================
   知識圖書館 web app — 閱讀導向設計
   設計線索取自 site_generator/templates/reading.css（紙本閱讀室 × 乾淨編輯 UI）
   ============================================================================= */

:root {
  --kl-bg: #f6f3ed;
  --kl-bg-elevated: #fffcf7;
  --kl-bg-soft: #efeae2;
  --kl-ink: #1c1917;
  --kl-ink-2: #44403c;
  --kl-ink-3: #78716c;
  --kl-ink-4: #a8a29e;
  --kl-line: rgba(28, 25, 23, 0.09);
  --kl-accent: #9a3412;
  --kl-accent-soft: rgba(154, 52, 18, 0.1);
  --kl-accent-hover: #7c2d12;
  --kl-shadow-sm: 0 1px 2px rgba(28, 25, 23, 0.04);
  --kl-shadow: 0 8px 28px rgba(28, 25, 23, 0.06);
  --kl-radius: 14px;
  --kl-radius-pill: 999px;
  --kl-font: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "Segoe UI", system-ui, sans-serif;
  --kl-mono: ui-monospace, "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--kl-bg);
  color: var(--kl-ink);
  font-family: var(--kl-font);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---- 頁首 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--kl-bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--kl-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.2rem;
}

.site-title {
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--kl-ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-nav { display: flex; gap: 1.1rem; }

.site-nav a {
  color: var(--kl-ink-2);
  text-decoration: none;
  font-size: 0.9rem;
}

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

.site-main {
  padding-top: 1.75rem;
  padding-bottom: 4rem;
  min-height: 70vh;
}

/* ---- 頁尾 ---- */
.site-footer {
  border-top: 1px solid var(--kl-line);
  padding: 1.2rem 0 2rem;
  font-size: 0.8rem;
  color: var(--kl-ink-3);
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

/* ---- 通用元件 ---- */
h1 { font-size: 1.85rem; letter-spacing: -0.02em; line-height: 1.3; margin: 0 0 1rem; }
h2 { font-size: 1.3rem; margin: 2.2rem 0 0.8rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--kl-line); }

a { color: var(--kl-accent); }

.muted { color: var(--kl-ink-3); font-size: 0.85rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  border-radius: var(--kl-radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  border: 1px solid var(--kl-line);
  background: var(--kl-bg-elevated);
  color: var(--kl-ink);
  box-shadow: var(--kl-shadow-sm);
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.12s ease, background 0.12s ease;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--kl-accent) 35%, var(--kl-line));
  background: var(--kl-bg-soft);
}

.btn--primary {
  background: var(--kl-ink);
  color: var(--kl-bg);
  border-color: transparent;
}

.btn--primary:hover { background: var(--kl-ink-2); }

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.65rem;
  border-radius: var(--kl-radius-pill);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--kl-ink-2);
  background: var(--kl-bg-soft);
  border: 1px solid var(--kl-line);
  white-space: nowrap;
}

.badge--type {
  background: var(--kl-accent-soft);
  color: var(--kl-accent);
  border-color: color-mix(in srgb, var(--kl-accent) 22%, transparent);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.crumb {
  font-size: 0.82rem;
  color: var(--kl-ink-3);
  margin-bottom: 1rem;
}

.crumb a { color: var(--kl-ink-3); text-decoration: none; }
.crumb a:hover { color: var(--kl-accent); }

/* ---- 首頁 ---- */
.hero {
  margin: 0.25rem 0 1.5rem;
  padding: 1.75rem 1.6rem;
  border-radius: calc(var(--kl-radius) + 4px);
  background: linear-gradient(145deg, color-mix(in srgb, var(--kl-accent) 8%, var(--kl-bg-elevated)), var(--kl-bg-elevated) 55%);
  border: 1px solid var(--kl-line);
  box-shadow: var(--kl-shadow-sm);
}

.hero h1 { margin: 0 0 0.4rem; }
.hero p { margin: 0; color: var(--kl-ink-2); }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(7rem, 1fr));
  gap: 0.7rem;
  margin-bottom: 1.5rem;
}

.stat {
  padding: 0.9rem 0.8rem;
  border-radius: var(--kl-radius);
  border: 1px solid var(--kl-line);
  background: var(--kl-bg-elevated);
  text-align: center;
  box-shadow: var(--kl-shadow-sm);
}

.stat__value { display: block; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.03em; }
.stat__label { display: block; margin-top: 0.2rem; font-size: 0.72rem; letter-spacing: 0.04em; color: var(--kl-ink-3); }

.quick-links { display: flex; gap: 0.55rem; flex-wrap: wrap; }

.category-list, .source-list { list-style: none; padding: 0; margin: 0.5rem 0 0; }

.category-list li, .source-list li {
  padding: 0.7rem 0.15rem;
  border-bottom: 1px solid var(--kl-line);
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.category-list a, .source-list a { font-weight: 650; text-decoration: none; color: var(--kl-ink); }
.category-list a:hover, .source-list a:hover { color: var(--kl-accent); }

/* ---- 篩選與列表 ---- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.filter-bar input[type="search"] {
  flex: 1 1 14rem;
  padding: 0.5rem 0.9rem;
  border-radius: var(--kl-radius-pill);
  border: 1px solid var(--kl-line);
  background: var(--kl-bg-elevated);
  font: inherit;
  color: var(--kl-ink);
}

.filter-bar select {
  padding: 0.5rem 0.7rem;
  border-radius: var(--kl-radius-pill);
  border: 1px solid var(--kl-line);
  background: var(--kl-bg-elevated);
  font: inherit;
  color: var(--kl-ink);
}

.filter-bar input:focus, .filter-bar select:focus {
  outline: 2px solid var(--kl-accent-soft);
  border-color: var(--kl-accent);
}

.export-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.8rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--kl-line);
  border-radius: var(--kl-radius);
  background: var(--kl-bg-elevated);
  font-size: 0.88rem;
  position: sticky;
  top: 3.4rem;
  z-index: 5;
}

.item-list { list-style: none; padding: 0; margin: 0.5rem 0 1.5rem; }

.item-row {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
  padding: 0.75rem 0.15rem;
  border-bottom: 1px solid var(--kl-line);
}

.item-check { align-self: center; }

.item-row__title { font-weight: 650; text-decoration: none; color: var(--kl-ink); flex: 1 1 auto; }
.item-row__title:hover { color: var(--kl-accent); }

.item-row__source { text-decoration: none; }
.item-row__source:hover { color: var(--kl-accent); }

.pager {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin: 1.25rem 0 2rem;
}

/* ---- 來源頁 ---- */
.source-meta {
  display: grid;
  gap: 0.85rem 1.25rem;
  grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr));
  margin: 0 0 2rem;
  padding: 1.1rem 1.2rem;
  border-radius: var(--kl-radius);
  border: 1px solid var(--kl-line);
  background: var(--kl-bg-elevated);
  font-size: 0.88rem;
  box-shadow: var(--kl-shadow-sm);
}

.source-meta dt {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--kl-ink-4);
  margin-bottom: 0.2rem;
}

.source-meta dd { margin: 0; font-weight: 500; word-break: break-word; }

.book-summary { margin-bottom: 2rem; }

/* ---- 閱讀內文 ---- */
.prose { font-size: 1.02rem; line-height: 1.8; }
.prose p, .prose li { max-width: 42em; }
.prose h2 { font-size: 1.35rem; }
.prose h3 { font-size: 1.12rem; margin: 1.8rem 0 0.55rem; }
.prose img { max-width: 100%; }
.prose blockquote {
  margin: 1.5rem 0;
  padding: 0.15rem 0 0.15rem 1.1rem;
  border-left: 3px solid var(--kl-accent);
  color: var(--kl-ink-2);
}
.prose code {
  font-family: var(--kl-mono);
  font-size: 0.86em;
  background: var(--kl-bg-soft);
  border-radius: 5px;
  padding: 0.12em 0.35em;
}

/* ---- 原文轉錄摺疊 ---- */
.transcript-block { margin-top: 2.5rem; }

.transcript-block details {
  border: 1px solid var(--kl-line);
  border-radius: var(--kl-radius);
  background: var(--kl-bg-elevated);
  overflow: hidden;
  box-shadow: var(--kl-shadow-sm);
}

.transcript-block summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.95rem 1.15rem;
  font-weight: 600;
  font-size: 0.9rem;
  user-select: none;
}

.transcript-block summary::-webkit-details-marker { display: none; }

.transcript-block summary::before {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-right: 1.5px solid var(--kl-ink-3);
  border-bottom: 1.5px solid var(--kl-ink-3);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

.transcript-block details[open] summary::before { transform: rotate(45deg); }
.transcript-block summary:hover { background: var(--kl-bg-soft); }
.transcript-block details[open] summary { border-bottom: 1px solid var(--kl-line); }

.transcript-hint { margin-left: auto; font-weight: 400; font-size: 0.75rem; color: var(--kl-ink-4); }

.transcript-body {
  padding: 0.85rem 1rem 1.1rem;
  max-height: 65vh;
  overflow: auto;
  background: var(--kl-bg);
}

pre.transcript {
  margin: 0;
  font-family: var(--kl-font);
  font-size: 0.85rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--kl-ink-2);
}

/* ---- 搜尋結果 ---- */
.search-results { list-style: none; padding: 0; margin: 0.5rem 0 1.5rem; }

.search-hit {
  padding: 0.9rem 0.15rem;
  border-bottom: 1px solid var(--kl-line);
}

.search-hit__title { font-weight: 650; font-size: 1.02rem; text-decoration: none; color: var(--kl-ink); }
.search-hit__title:hover { color: var(--kl-accent); }

.search-hit .muted a { color: var(--kl-ink-3); text-decoration: none; }
.search-hit .muted a:hover { color: var(--kl-accent); }

.search-hit__snippet {
  margin: 0.35rem 0 0;
  font-size: 0.88rem;
  color: var(--kl-ink-2);
}

mark {
  background: color-mix(in srgb, var(--kl-accent) 22%, transparent);
  color: inherit;
  border-radius: 3px;
  padding: 0 0.1em;
}

/* ---- 登入頁 ---- */
.login-card {
  max-width: 22rem;
  margin: 4rem auto;
  padding: 2rem 1.75rem;
  border: 1px solid var(--kl-line);
  border-radius: var(--kl-radius);
  background: var(--kl-bg-elevated);
  box-shadow: var(--kl-shadow);
}

.login-card h1 { font-size: 1.4rem; margin-bottom: 0.4rem; }
.login-hint { color: var(--kl-ink-3); font-size: 0.88rem; margin-top: 0; }

.login-card form { display: flex; flex-direction: column; gap: 0.7rem; }

.login-card label { font-size: 0.85rem; font-weight: 600; }

.login-card input[type="password"] {
  padding: 0.55rem 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--kl-line);
  background: var(--kl-bg);
  font: inherit;
  color: var(--kl-ink);
}

.login-card input:focus { outline: 2px solid var(--kl-accent-soft); border-color: var(--kl-accent); }

.form-error {
  margin: 0.5rem 0;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  background: var(--kl-accent-soft);
  color: var(--kl-accent);
  font-size: 0.88rem;
}

/* ---- Toast 提示 ---- */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(1rem);
  background: var(--kl-ink);
  color: var(--kl-bg);
  padding: 0.6rem 1.2rem;
  border-radius: var(--kl-radius-pill);
  font-size: 0.88rem;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  z-index: 100;
}

.toast--show { opacity: 1; transform: translateX(-50%) translateY(0); }