:root {
  --bg: #f3f6f7;
  --paper: #fff;
  --ink: #102a33;
  --muted: #5f7480;
  --accent: #146e6b;
  --soft: #e7f4f2;
  --line: #d5e0e5;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}
html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e161b;
  --paper: #172229;
  --ink: #e8eef2;
  --muted: #9aadb6;
  --accent: #5dcec8;
  --soft: #1b3a38;
  --line: #31454e;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; display: flex; flex-direction: column; background: var(--bg); color: var(--ink); font: 16px/1.5 var(--sans); }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { opacity: .4; cursor: default; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid #65b8b1; outline-offset: 2px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }
.top { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 8px 24px; align-items: end; padding: 16px 20px 10px; border-bottom: 1px solid var(--line); background: var(--paper); }
.eyebrow { margin: 0; font-size: 12px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
h1 { margin: 2px 0 0; font: 700 34px/1.05 var(--serif); letter-spacing: -.8px; }
.summary { margin: 0 0 4px; color: var(--muted); font-size: 14px; }
.tools { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 8px; align-items: end; }
.tools label { display: flex; flex-direction: column; gap: 3px; min-width: 0; font-size: 12px; font-weight: 700; color: var(--muted); }
.tools select, .search input, .theme-toggle, .quiet, .primary, .jump input { height: 42px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.tools select { min-width: 128px; padding: 0 28px 0 10px; }
.search { flex: 1; min-width: 160px; }
.search input { width: 100%; padding: 0 12px; }
.theme-toggle, .quiet, .primary { padding: 0 14px; font-weight: 750; }
.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.workspace { flex: 1; min-height: 0; display: grid; grid-template-columns: 300px minmax(0, 1fr); }
.index { overflow: auto; border-right: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 72%, var(--bg)); padding: 8px 0 24px; }
.index[hidden] { display: none; }
.index h2 { margin: 16px 16px 6px; font-size: 13px; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
.index h3 { margin: 12px 16px 4px; font-size: 13px; color: var(--ink); }
.index button { display: block; width: 100%; border: 0; border-left: 3px solid transparent; background: transparent; text-align: left; padding: 8px 16px; color: var(--ink); }
.index button small { display: block; color: var(--muted); font-size: 12px; font-weight: 500; }
.index button span { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.index button[aria-current="true"] { border-left-color: var(--accent); background: var(--soft); font-weight: 750; }
.stage { min-height: 0; overflow: auto; padding: 22px 22px 28px; }
.card { width: min(820px, 100%); margin: 0 auto; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; padding: 28px 32px 32px; box-shadow: 0 10px 30px #102a3312; }
.card-top { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.card-top img { width: 72px; aspect-ratio: 3/4; object-fit: cover; object-position: center 18%; border-radius: 8px; border: 1px solid var(--line); }
.position { margin: 0; font-variant-numeric: tabular-nums; font-weight: 750; color: var(--accent); }
.kicker { margin: 4px 0; color: var(--muted); font-size: 14px; }
.topic { margin: 0; font-size: 15px; color: var(--muted); }
.card h2 { margin: 18px 0 8px; font: 500 clamp(26px, 3vw, 38px)/1.35 var(--serif); letter-spacing: -.4px; white-space: pre-line; }
.role, .attribution, .year-note { margin: 8px 0; color: var(--muted); font-size: 14px; }
.attribution { padding: 8px 12px; border-radius: 8px; background: var(--soft); color: var(--accent); }
.answer { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); }
.answer[hidden] { display: none; }
.answer p { margin: 0 0 8px; font-size: 12px; font-weight: 750; letter-spacing: .05em; text-transform: uppercase; color: var(--accent); }
.answer ul, .original { margin: 0; padding-left: 20px; }
.answer li, .original li { margin: 0 0 8px; }
.context-note { color: var(--muted); font-size: 14px; text-transform: none; letter-spacing: 0; font-weight: 500; }
details { margin-top: 16px; }
summary { cursor: pointer; font-weight: 750; color: var(--muted); }
.dock { border-top: 1px solid var(--line); background: var(--paper); padding: 10px 16px max(12px, env(safe-area-inset-bottom)); }
.dock p { margin: 0 0 8px; text-align: center; color: var(--muted); font-size: 12px; }
.dock-controls, .jump { display: flex; justify-content: center; align-items: center; gap: 8px; flex-wrap: wrap; }
.jump input { width: 76px; padding: 0 8px; }
.empty { width: min(820px, 100%); margin: 40px auto; color: var(--muted); }
.start-study { display: none; }
.focus { position: fixed; inset: 0; z-index: 40; display: flex; flex-direction: column; background: var(--bg); color: var(--ink); padding: max(12px, env(safe-area-inset-top)) 0 max(8px, env(safe-area-inset-bottom)); }
.focus[hidden] { display: none !important; }
.focus-exit { position: absolute; top: max(8px, env(safe-area-inset-top)); right: 8px; z-index: 2; width: 44px; height: 44px; border: 0; background: transparent; color: var(--muted); font-size: 32px; line-height: 1; }
.focus-card { flex: 1; min-height: 0; overflow: auto; -webkit-overflow-scrolling: touch; touch-action: pan-y; padding: 8px 18px 12px; }
.focus-card .card { width: 100%; margin: 0; border: 0; box-shadow: none; background: transparent; padding: 36px 4px 24px; }
.focus-card h2 { font-size: clamp(28px, 8vw, 40px); }
.focus-caption { margin: 0; padding: 8px 16px 4px; text-align: center; color: var(--muted); font-size: 13px; }
body.focus-on { overflow: hidden; }
body.focus-on .top, body.focus-on .workspace, body.focus-on .dock { display: none; }
@media (max-width: 980px) {
  .workspace { display: block; }
  .index { display: none; max-height: 42vh; border-right: 0; border-bottom: 1px solid var(--line); }
  .index.is-open { display: block; }
  .top { display: flex; flex-direction: column; align-items: stretch; gap: 10px; padding: 16px 14px 12px; }
  h1 { font-size: 30px; }
  .summary { font-size: 13px; }
  .tools { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
  .tools .search, .start-study, #index-toggle, #logout, .theme-toggle { grid-column: 1 / -1; }
  .tools select, .search input, .theme-toggle, .quiet, .start-study { width: 100%; height: 48px; font-size: 16px; }
  .start-study { display: inline-flex; align-items: center; justify-content: center; order: -1; border: 0; border-radius: 12px; background: var(--accent); color: #fff; font-weight: 800; }
  .dock { display: none; }
  .stage { padding: 12px; }
  .card { padding: 18px 14px 22px; border-radius: 14px; }
  .card h2 { font-size: 26px; }
}
@media (min-width: 981px) {
  #index-toggle, .start-study { display: none; }
}
html.pending .workspace, html.pending .dock, html.locked .workspace, html.locked .dock, html.locked .top { visibility: hidden; }
html.locked .top { display: none; }
.gate { position: fixed; inset: 0; z-index: 20; display: flex; align-items: center; justify-content: center; padding: 24px; background: var(--bg); }
.gate[hidden] { display: none !important; }
.gate-card { width: min(100%, 420px); background: var(--paper); border: 1px solid var(--line); border-radius: 16px; padding: 28px; }
.gate-card h2 { margin: 8px 0; font: 700 36px/1.1 var(--serif); }
.gate-card p { margin: 0 0 14px; color: var(--muted); }
.gate-card label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 750; }
.gate-card input { width: 100%; height: 46px; margin-bottom: 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); padding: 0 12px; }
.gate-actions { display: flex; gap: 8px; }
#gate-error { min-height: 1.4em; color: #9a4b08; }
@media print {
  .top .tools, .dock, .index { display: none !important; }
  body { display: block; background: white; color: black; }
  .card { box-shadow: none; border: 0; }
}