:root {
  /* === Light theme: 現代金融專業白 === */
  --bg: #fafaf7;
  --bg-soft: #f4f2ec;
  --bg-card: #ffffff;
  --line: #e5e3dd;
  --line-strong: #d4d1c8;
  --ink: #1a1a1a;
  --ink-soft: #5a5a5a;
  --ink-dim: #8a8a8a;
  --primary: #1e3a5f;
  --primary-soft: #3b5a82;
  --gold: #a07d3a;
  --gold-soft: #c5a565;
  --crimson: #a73a3a;
  --jade: #2d7a4f;
  --shadow-sm: 0 1px 2px rgba(30, 58, 95, 0.04), 0 0 0 1px rgba(30, 58, 95, 0.04);
  --shadow-md: 0 4px 12px rgba(30, 58, 95, 0.06), 0 0 0 1px rgba(30, 58, 95, 0.04);
  --serif: "Noto Serif TC", "Cormorant Garamond", serif;
  --display: "Cormorant Garamond", "Noto Serif TC", serif;
  --mono: "JetBrains Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

body {
  background-image:
    radial-gradient(ellipse at top, rgba(30, 58, 95, 0.025) 0%, transparent 60%),
    radial-gradient(ellipse at bottom right, rgba(160, 125, 58, 0.02) 0%, transparent 50%);
  background-attachment: fixed;
}

.app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  position: relative;
  z-index: 2;
  padding-bottom: 110px;
}

/* ===== Header ===== */
header {
  padding: 28px 24px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-card);
}

h1.title {
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-top: 6px;
}

h1.title .accent {
  color: var(--primary);
  font-style: italic;
  font-family: var(--display);
  font-weight: 500;
}

.brand-wordmark {
  font-family: var(--display);
  font-style: italic;
  color: var(--gold);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.06em;
  margin-top: 4px;
}

.subtitle {
  font-family: var(--display);
  font-style: italic;
  color: var(--ink-soft);
  font-size: 16px;
  margin-top: 6px;
}

/* ===== Tab nav ===== */
nav.tabs {
  display: flex;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
  background: var(--bg-card);
  position: sticky;
  top: 0;
  z-index: 50;
}

nav.tabs::-webkit-scrollbar { display: none; }

.tab {
  flex: 0 0 auto;
  padding: 14px 18px;
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-dim);
  border: none;
  background: transparent;
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color 0.2s;
}

.tab.active { color: var(--primary); }

.tab.active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 18px;
  right: 18px;
  height: 2px;
  background: var(--primary);
}

.page { display: none; padding: 24px; }
.page.active { display: block; animation: fade 0.3s ease; }

@keyframes fade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
}

.section-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 0.15em;
}

.section-title {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* ===== Sync / index status banner ===== */
.sync-banner {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--jade);
  border-radius: 6px;
  padding: 14px 18px;
  margin-bottom: 20px;
  font-size: 12px;
  line-height: 1.6;
  box-shadow: var(--shadow-sm);
}

.sync-banner .label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--jade);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.sync-banner .info { color: var(--ink-soft); font-size: 13px; }

.sync-banner .info strong {
  color: var(--ink);
  font-family: var(--mono);
  font-weight: 600;
}

/* ===== Search ===== */
.search-box {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 14px 16px;
  font-family: var(--serif);
  font-size: 15px;
  border-radius: 6px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
  transition: all 0.15s;
}

.search-box:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.08);
}

/* ===== Smart-hit banner（解析「法規 條號」格式時顯示） ===== */
.smart-hit {
  background: var(--bg-card);
  border: 1px solid var(--primary);
  border-radius: 6px;
  padding: 14px 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.smart-hit .label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--primary);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.smart-hit .target {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.smart-hit .target .article {
  color: var(--primary);
  font-family: var(--display);
  font-weight: 700;
}

.smart-hit .target .topic {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 13px;
  color: var(--ink-soft);
  margin-left: 6px;
}

.smart-hit-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  padding: 10px 14px;
  border-radius: 4px;
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s;
}

.smart-hit-action:hover { background: var(--primary-soft); }
.smart-hit-action:active { transform: scale(0.99); }

.smart-hit .note {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.05em;
}

/* ===== Filter chips ===== */
.chips {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 18px;
  scrollbar-width: none;
}

.chips::-webkit-scrollbar { display: none; }

.chip {
  flex: 0 0 auto;
  padding: 7px 12px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  border-radius: 3px;
  font-family: var(--serif);
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}

.chip.active {
  background: var(--cat-color, var(--primary));
  border-color: var(--cat-color, var(--primary));
  color: #fff;
  font-weight: 600;
}

/* ===== Law cards ===== */
.law-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.law-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cat-color, var(--primary));
  padding: 16px;
  border-radius: 6px;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.law-item:hover { box-shadow: var(--shadow-md); border-color: var(--line-strong); border-left-color: var(--cat-color, var(--primary)); }

.law-item-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.law-cat-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  color: #fff;
  background: var(--cat-color, var(--primary));
  padding: 3px 7px;
  border-radius: 2px;
  letter-spacing: 0.1em;
}

.law-id {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.08em;
}

.law-name {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
  margin-bottom: 6px;
}

.law-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
  font-size: 12px;
}

.law-abbr {
  font-family: var(--serif);
  color: var(--ink-soft);
}

.law-abbr::before {
  content: "縮寫 ";
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.1em;
}

.law-authority {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--gold);
  background: rgba(160, 125, 58, 0.08);
  padding: 2px 7px;
  border-radius: 2px;
  letter-spacing: 0.05em;
  align-self: center;
}

.law-articles {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin-bottom: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.article-chip-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.1em;
  margin-right: 2px;
}

.article-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--serif);
  font-size: 12px;
  color: var(--primary);
  background: rgba(30, 58, 95, 0.06);
  padding: 4px 9px;
  border-radius: 3px;
  text-decoration: none;
  transition: background 0.15s;
}

.article-chip:hover { background: rgba(30, 58, 95, 0.12); }
.article-chip[aria-disabled="true"] { color: var(--ink-dim); cursor: not-allowed; }

.article-chip .topic {
  color: var(--ink-soft);
  font-size: 11px;
  margin-left: 4px;
}

.btn-view-full {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 10px;
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 600;
  border-radius: 3px;
  text-decoration: none;
  text-align: center;
  transition: background 0.15s;
}

.btn-view-full:hover { background: rgba(30, 58, 95, 0.04); }
.btn-view-full:active { transform: scale(0.99); }

/* ===== Empty / Loading ===== */
.empty, .loading {
  text-align: center;
  padding: 50px 20px;
  color: var(--ink-dim);
}

.empty-mark {
  font-family: var(--display);
  font-size: 48px;
  color: var(--line);
  margin-bottom: 12px;
  font-style: italic;
}

.empty-text { font-size: 13px; line-height: 1.7; }

.spinner {
  width: 28px;
  height: 28px;
  border: 2px solid var(--line);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Footer ===== */
.site-footer {
  margin: 24px 24px 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.08em;
}

.footer-link {
  background: none;
  border: none;
  color: var(--primary);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  cursor: pointer;
  padding: 4px 0;
}

.footer-link:hover { text-decoration: underline; }
.footer-sep { color: var(--line-strong); }

/* ===== Bottom nav ===== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  background: var(--bg-card);
  border-top: 1px solid var(--line);
  box-shadow: 0 -2px 12px rgba(30, 58, 95, 0.05);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom);
}

.nav-btn {
  background: none;
  border: none;
  color: var(--ink-dim);
  padding: 12px 4px 14px;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 11px;
  transition: color 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.nav-btn.active { color: var(--primary); }

.nav-icon {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
}

/* ===== Highlight mark for search ===== */
mark {
  background: rgba(160, 125, 58, 0.18);
  color: var(--gold);
  padding: 1px 3px;
  border-radius: 2px;
  font-weight: 600;
}

/* ===== Stats line ===== */
.stats-line {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

/* ===== Q&A page ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--primary);
  font-family: var(--display);
  font-size: 13px;
  cursor: pointer;
  padding: 6px 0 14px;
}

.back-link:hover { text-decoration: underline; }

.qa-cat-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}

.qa-cat-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: 6px;
  padding: 12px 14px;
  cursor: pointer;
  text-align: left;
  font-family: var(--serif);
  transition: all 0.15s;
  box-shadow: var(--shadow-sm);
}

.qa-cat-card:hover { box-shadow: var(--shadow-md); border-color: var(--line-strong); }
.qa-cat-card:active { transform: scale(0.99); }

.qa-cat-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
}

.qa-cat-id {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--ink-dim);
  letter-spacing: 0.08em;
}

.qa-cat-count {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--gold);
  font-weight: 600;
  background: rgba(160, 125, 58, 0.1);
  padding: 2px 7px;
  border-radius: 2px;
}

.qa-cat-name {
  font-size: 14px;
  line-height: 1.45;
  color: var(--ink);
  font-weight: 600;
}

.qa-cat-title {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.qa-doc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.qa-doc-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 14px;
  cursor: pointer;
  text-align: left;
  font-family: var(--serif);
  transition: all 0.15s;
  box-shadow: var(--shadow-sm);
}

.qa-doc-item:hover { box-shadow: var(--shadow-md); border-color: var(--line-strong); }

.qa-doc-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
  margin-bottom: 6px;
}

.qa-doc-meta {
  display: flex;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.05em;
}

.qa-doc-date::before { content: "📅 "; }
.qa-doc-pages::before { content: "▤ "; }

/* Q&A detail */
.qa-detail {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}

.qa-detail-source {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--gold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.qa-detail-title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
  margin-bottom: 10px;
}

.qa-detail-meta {
  display: flex;
  gap: 14px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.qa-detail-meta strong {
  color: var(--ink);
  font-family: var(--mono);
}

/* 嚴格保留 PDF 原文格式：pre-wrap、不修改 */
.qa-raw-text {
  background: var(--bg-soft);
  border-left: 3px solid var(--primary);
  padding: 16px 18px;
  border-radius: 0 4px 4px 0;
  font-family: var(--serif);
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink);
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
  margin-bottom: 14px;
  max-height: 60vh;
  overflow-y: auto;
}

.btn-pdf-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: #fff;
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 600;
  border-radius: 3px;
  text-decoration: none;
  text-align: center;
  transition: background 0.15s;
  margin-bottom: 14px;
}

.btn-pdf-download:hover { background: var(--primary-soft); }
.btn-pdf-download:active { transform: scale(0.99); }

/* Q&A error states (when fetch_qa.py 標 doc.error，例如 SFB 直連被擋) */
.qa-doc-item-error {
  opacity: 0.78;
}
.qa-doc-item-error:hover {
  opacity: 1;
}
.qa-doc-error-badge {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  color: #b07005;
  background: rgba(245, 166, 35, 0.12);
  border: 1px solid rgba(245, 166, 35, 0.45);
  padding: 1px 6px;
  border-radius: 3px;
  white-space: nowrap;
}
.qa-doc-error {
  margin: 12px 0;
  padding: 14px 16px;
  border-left: 3px solid #f5a623;
  background: rgba(245, 166, 35, 0.06);
  border-radius: 0 4px 4px 0;
}
.qa-doc-error-title {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: #b07005;
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}
.qa-doc-error-msg {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 12px;
}
.qa-doc-error-msg code {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--bg-soft, rgba(0,0,0,0.04));
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--ink-dim);
}
.qa-doc-error .btn-pdf-download {
  margin-top: 4px;
}

.qa-detail-footer {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  line-height: 1.7;
  letter-spacing: 0.05em;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

/* Q&A search hits */
.qa-hit-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.qa-hit-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 16px;
  cursor: pointer;
  text-align: left;
  font-family: var(--serif);
  transition: all 0.15s;
  box-shadow: var(--shadow-sm);
}

.qa-hit-item:hover { box-shadow: var(--shadow-md); border-color: var(--line-strong); }

.qa-hit-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}

.qa-hit-cat {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--gold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.qa-hit-flag {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--primary);
  background: rgba(30, 58, 95, 0.08);
  padding: 2px 6px;
  border-radius: 2px;
  letter-spacing: 0.05em;
}

.qa-hit-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.5;
}

.qa-hit-snippet {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.65;
  background: var(--bg-soft);
  padding: 8px 10px;
  border-radius: 3px;
  margin-bottom: 6px;
}

.qa-hit-date {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.05em;
}

/* ===== Home: daily challenge + progress + quick entries ===== */
.daily-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: 6px;
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}

.daily-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--gold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.daily-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.daily-question {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 14px;
  font-weight: 500;
}

.progress-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.progress-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.progress-num {
  font-family: var(--display);
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.1;
}

.progress-unit {
  font-family: var(--display);
  font-size: 16px;
  color: var(--ink-soft);
  margin-left: 2px;
}

.progress-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
  margin-top: 4px;
}

.progress-cat-block { margin-top: 16px; }

.progress-cat-list {
  list-style: none;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 0;
  box-shadow: var(--shadow-sm);
}

.progress-cat-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.progress-cat-list li:last-child { border-bottom: none; }

.progress-cat-list .cat-name { color: var(--ink); }

.progress-cat-list .cat-stat {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
}

/* ===== Quiz / Scenario shared UI ===== */
.quiz-section-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-soft);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin: 14px 0 8px;
}

.quiz-pool-info {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.1em;
  margin-top: 18px;
}

.btn-primary {
  display: block;
  width: 100%;
  padding: 13px;
  margin-top: 16px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover { background: var(--primary-soft); }
.btn-primary:active { transform: scale(0.99); }

.btn-secondary {
  display: block;
  width: 100%;
  padding: 12px;
  margin-top: 8px;
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 4px;
  font-family: var(--serif);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-secondary:hover { background: rgba(30, 58, 95, 0.04); }
.btn-secondary.disabled { color: var(--ink-dim); border-color: var(--line); cursor: not-allowed; }

/* Quiz play */
.quiz-progress-dots {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  justify-content: center;
}

.quiz-progress-dots .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line);
}

.quiz-progress-dots .dot.current { background: var(--primary); transform: scale(1.4); }
.quiz-progress-dots .dot.correct { background: var(--jade); }
.quiz-progress-dots .dot.wrong { background: var(--crimson); }

.quiz-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.quiz-meta-cat {
  background: rgba(30, 58, 95, 0.08);
  color: var(--primary);
  padding: 3px 8px;
  border-radius: 2px;
}

.quiz-meta-diff {
  background: rgba(160, 125, 58, 0.1);
  color: var(--gold);
  padding: 3px 8px;
  border-radius: 2px;
}

.quiz-meta-pos { margin-left: auto; color: var(--ink-dim); }

.quiz-question {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink);
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.quiz-options { display: flex; flex-direction: column; gap: 8px; }

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 12px 14px;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 14px;
  line-height: 1.6;
  transition: all 0.15s;
  box-shadow: var(--shadow-sm);
}

.quiz-option:hover:not(:disabled) { border-color: var(--primary); }
.quiz-option:disabled { cursor: default; }
.quiz-option.selected { border-color: var(--primary); background: rgba(30, 58, 95, 0.04); }
.quiz-option.correct { border-color: var(--jade); background: rgba(45, 122, 79, 0.08); }
.quiz-option.wrong { border-color: var(--crimson); background: rgba(167, 58, 58, 0.06); }

.opt-letter {
  font-family: var(--display);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-soft);
  flex: 0 0 auto;
}

.quiz-option.correct .opt-letter { color: var(--jade); }
.quiz-option.wrong .opt-letter { color: var(--crimson); }

.opt-text { flex: 1; color: var(--ink); }

.opt-mark {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 700;
  flex: 0 0 auto;
}

.quiz-option.correct .opt-mark { color: var(--jade); }
.quiz-option.wrong .opt-mark { color: var(--crimson); }

.quiz-feedback {
  margin-top: 18px;
  padding: 16px;
  background: var(--bg-soft);
  border-radius: 4px;
  border-left: 3px solid var(--primary);
}

.feedback-label {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feedback-label.correct { color: var(--jade); }
.feedback-label.wrong { color: var(--crimson); }

.feedback-explanation {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink);
  margin-bottom: 10px;
}

.feedback-source {
  font-size: 12px;
  color: var(--ink-soft);
  padding-top: 10px;
  border-top: 1px dashed var(--line-strong);
  margin-bottom: 12px;
}

.feedback-source a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.feedback-source a:hover { text-decoration: underline; }

/* Quiz result */
.quiz-result {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
}

.result-headline {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.result-pct {
  font-family: var(--display);
  font-size: 56px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.result-fraction {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 6px;
  letter-spacing: 0.1em;
}

.result-wrong-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 8px;
}

.result-wrong-list li {
  background: var(--bg-soft);
  border-left: 3px solid var(--crimson);
  padding: 10px 12px;
  border-radius: 0 4px 4px 0;
}

.result-wrong-cat {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--ink-dim);
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.result-wrong-q {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
  margin-bottom: 4px;
}

.result-wrong-correct {
  font-size: 12px;
  color: var(--jade);
  font-weight: 600;
}

.result-actions { margin-top: 14px; }

/* ===== Modal ===== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 26, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.show { display: flex; animation: fade 0.2s ease; }

.modal-inner {
  background: var(--bg-card);
  border-radius: 6px;
  max-width: 440px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.modal-title {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--ink-soft);
  cursor: pointer;
  line-height: 1;
  padding: 0 4px;
}

.modal-body {
  padding: 18px 20px 22px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink);
}

.modal-body p { margin-bottom: 10px; }
.modal-body ul { margin: 8px 0 12px 22px; color: var(--ink-soft); }
.modal-body li { margin-bottom: 4px; }

/* ===== Responsive: Tablet & Desktop ===== */
/* Mobile (<768px) keeps the original 480px-wide single-column layout. */

/* Tablet 768–1023 */
@media (min-width: 768px) {
  .app {
    max-width: 720px;
  }
  .bottom-nav {
    max-width: 720px;
  }
  .modal-inner {
    max-width: 600px;
  }
  .page {
    padding: 28px 32px;
  }
  header {
    padding: 32px 32px 22px;
  }
}

/* Desktop ≥1024 */
@media (min-width: 1024px) {
  .app {
    max-width: 1100px;
    padding-bottom: 32px; /* no bottom nav on desktop */
  }
  .bottom-nav {
    display: none;
  }
  .modal-inner {
    max-width: 720px;
  }
  .page {
    padding: 32px 40px;
  }
  header {
    padding: 36px 40px 24px;
  }
  nav.tabs {
    padding: 0 24px;
  }

  /* Q&A category cards: widen so we get 4–5 cols instead of ~7 */
  .qa-cat-list {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
  }

  /* Subtle font bump on desktop */
  body {
    font-size: 17px;
  }
  h1.title {
    font-size: clamp(30px, 2.6vw, 38px);
  }
  .law-name {
    font-size: 16px;
  }
}

/* ===== 考古題 ===== */
.exam-home {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.exam-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 12px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  margin-bottom: 4px;
}

.exam-stats-item {
  text-align: center;
  padding: 4px 0;
}

.exam-stats-num {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.1;
}

.exam-stats-label {
  font-size: 10.5px;
  color: var(--ink-dim);
  margin-top: 2px;
  letter-spacing: 0.05em;
}

.exam-paper-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 10px;
}

.exam-paper-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 14px 12px;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
  font-family: inherit;
}

.exam-paper-card:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.exam-paper-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.exam-paper-year {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}

.exam-paper-q {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-dim);
  background: var(--bg-soft);
  padding: 2px 6px;
  border-radius: 3px;
}

.exam-paper-subject {
  font-size: 14px;
  color: var(--ink);
  margin-bottom: 8px;
  font-weight: 500;
}

.exam-paper-meta {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--ink-dim);
  font-family: var(--mono);
}

.exam-paper-stat { color: var(--gold); }

.exam-paper-detail-head {
  margin: 8px 0 12px;
}

.exam-paper-detail-title {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 4px;
}

.exam-paper-detail-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-dim);
}

.exam-paper-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.exam-paper-actions a.btn-secondary {
  text-align: center;
  text-decoration: none;
  display: block;
}

.exam-browse-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 12px;
}

.exam-browse-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--primary);
  border-radius: 4px;
  padding: 14px 14px 12px;
}

.exam-browse-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.exam-browse-stem {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 10px;
}

.exam-browse-opts {
  list-style: none;
  padding: 0;
  margin: 0 0 10px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.exam-browse-opt {
  display: flex;
  gap: 8px;
  padding: 6px 10px;
  font-size: 13px;
  color: var(--ink-soft);
  border-radius: 3px;
}

.exam-browse-opt.correct {
  background: rgba(45, 122, 79, 0.08);
  color: var(--ink);
  border-left: 2px solid var(--jade);
}

.exam-browse-opt .opt-letter {
  font-family: var(--mono);
  font-weight: 700;
  width: 16px;
}

.exam-browse-ans {
  font-size: 12px;
  color: var(--ink-dim);
  border-top: 1px dashed var(--line);
  padding-top: 8px;
  font-family: var(--mono);
}

.exam-browse-ans strong { color: var(--jade); font-family: var(--serif); }

@media (min-width: 768px) {
  .exam-paper-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .exam-paper-list {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== 題庫池摘要（quiz start 頁頂部行）===== */
.quiz-pool-summary {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-dim);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}

/* ===== 待審警示框（解析下方，提示未經人工驗證）===== */
.feedback-pending-note {
  margin: 8px 0 12px;
  padding: 8px 10px;
  background: rgba(160, 125, 58, 0.08);
  border-left: 2px solid var(--gold);
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.6;
  border-radius: 2px;
}

/* ===== Daily challenge：10 題卡片（首頁）===== */
.daily-headline {
  font-family: var(--serif);
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}

.daily-progress-line {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.daily-progress-text {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.05em;
}

.daily-preview {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 11px;
  flex-wrap: wrap;
}

.daily-preview-hint {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.08em;
}

.daily-cta {
  width: 100%;
  margin-top: 4px;
}

/* ===== Daily 完成卡片 ===== */
.daily-card-done {
  border-left-color: var(--jade);
}

.daily-done-mark {
  color: var(--jade);
  font-weight: 700;
}

.daily-done-score {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 8px 0 12px;
}

.daily-done-pct {
  font-family: var(--display);
  font-size: 36px;
  font-weight: 700;
  color: var(--jade);
  line-height: 1;
}

.daily-done-frac {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink-soft);
}

.daily-tomorrow {
  margin-top: 14px;
  text-align: center;
  font-family: var(--serif);
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

/* ===== Daily 在 quiz play / result 頁面的小裝飾 ===== */
.daily-play-head {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--gold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin: 8px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

.result-daily-badge {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--jade);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 14px;
  text-align: center;
}

.result-tomorrow {
  margin-top: 14px;
  text-align: center;
  font-family: var(--serif);
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
}