:root {
  --bg: #f7f4ee;
  --surface: #ffffff;
  --surface-2: #f1ece2;
  --ink: #1d2433;
  --ink-2: #4a5468;
  --ink-3: #6b7385;
  --line: #e2dccf;
  --accent: #b4561f;
  --accent-ink: #ffffff;
  --accent-soft: #f6e3d4;
  --navy: #1f2a44;
  --ok: #1f7a4d;
  --ok-soft: #dcf0e4;
  --warn: #8a5a00;
  --warn-soft: #fbefd2;
  --err: #b42318;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(29, 36, 51, .06), 0 6px 20px rgba(29, 36, 51, .06);
  --font: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #12161f;
  --surface: #1a202c;
  --surface-2: #222a38;
  --ink: #eef0f5;
  --ink-2: #c0c6d2;
  --ink-3: #98a0b0;
  --line: #2e3646;
  --accent: #f0904f;
  --accent-ink: #1a1206;
  --accent-soft: #3a2a1e;
  --navy: #0d1220;
  --ok: #5fd39a;
  --ok-soft: #173627;
  --warn: #f4c562;
  --warn-soft: #3a3016;
  --err: #ff8a80;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .25);
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 var(--ui); overflow-x: hidden; }
a { color: var(--accent); }
h1, h2, h3 { font-family: var(--font); line-height: 1.2; margin: 0; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; max-width: 1180px; margin: 0 auto; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 600 18px/1 var(--font); }
.top-right { display: flex; align-items: center; gap: 10px; }
.back { font-size: 14px; color: var(--ink-2); text-decoration: none; }
.back:hover { color: var(--accent); }
.icon-btn { display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; }

main { max-width: 1180px; margin: 0 auto; padding: 0 16px 48px; }
.hero { padding: 28px 0 18px; max-width: 760px; }
.hero h1 { font-size: clamp(30px, 5vw, 46px); letter-spacing: -.01em; }
.lead { font-size: 18px; color: var(--ink-2); margin: 12px 0 0; }

.btn { font: 600 15px/1 var(--ui); padding: 11px 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; min-height: 42px; }
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover:not(:disabled) { filter: brightness(1.06); }
.btn.ghost { background: transparent; }
.btn.small { padding: 7px 11px; min-height: 34px; font-size: 14px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.link-btn { background: none; border: 0; padding: 0; color: var(--accent); font: inherit; cursor: pointer; text-decoration: underline; }
.row-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

.drop { background: var(--surface); border: 2px dashed var(--line); border-radius: var(--radius); padding: 28px 20px; text-align: center; box-shadow: var(--shadow); transition: border-color .15s, background .15s; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop-inner svg { color: var(--accent); }
.drop-title { font: 600 22px/1.2 var(--font); margin: 8px 0 2px; }
.drop-sub { color: var(--ink-3); margin: 0 0 16px; }
.drop-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.paste { text-align: left; margin-top: 18px; display: grid; gap: 8px; }
.paste textarea, textarea, select, input[type="text"] { width: 100%; font: 15px/1.45 var(--ui); color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 9px 11px; }
.drop-error { color: var(--err); margin: 12px 0 0; }

.resume { margin-top: 16px; background: var(--accent-soft); border-radius: var(--radius); padding: 14px 16px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; }
.resume p { margin: 0; }
.resume .row-actions { margin: 0; }

.work { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 22px; margin-top: 22px; align-items: start; }
.bookhead { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.bookhead h2 { font-size: 28px; overflow-wrap: anywhere; }
.byline { color: var(--ink-3); margin: 6px 0 0; font-size: 14px; }
.warnings { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 6px; }
.warnings li { background: var(--warn-soft); color: var(--warn); border-radius: 10px; padding: 8px 12px; font-size: 14px; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 16px 0 10px; }
.toolbar select { width: auto; }
.field { display: block; font-size: 14px; font-weight: 600; color: var(--ink-2); margin: 12px 0 6px; }
.field.inline { display: inline-flex; align-items: center; gap: 8px; margin: 0; }
.field output { font-weight: 700; color: var(--ink); margin-left: 4px; }
.hint { display: block; font-weight: 400; color: var(--ink-3); font-size: 13px; }
.method { font-size: 13px; color: var(--ink-3); }
.spacer { flex: 1; }

.chapters { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.ch { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; box-shadow: var(--shadow); }
.ch.off { opacity: .62; box-shadow: none; }
.ch-top { display: flex; align-items: center; gap: 10px; }
.ch-top .inc { width: 20px; height: 20px; flex: none; accent-color: var(--accent); }
.num { flex: none; min-width: 26px; font: 600 14px/1 var(--ui); color: var(--ink-3); }
.ch-top .title { flex: 1; min-width: 0; font: 600 16px/1.3 var(--font); border-color: transparent; background: transparent; padding: 6px 8px; }
.ch-top .title:hover, .ch-top .title:focus { border-color: var(--line); background: var(--surface); }
.state { flex: none; font-size: 12px; font-weight: 700; padding: 4px 9px; border-radius: 999px; background: var(--surface-2); color: var(--ink-2); white-space: nowrap; }
.state.ready { background: var(--ok-soft); color: var(--ok); }
.state.part, .state.busy { background: var(--accent-soft); color: var(--accent); }
.ch-meta { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 13px; color: var(--ink-3); margin: 4px 0 0 66px; }
.why { color: var(--warn); }
.ch-actions { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 0 66px; }
.player { display: block; width: 100%; margin-top: 10px; height: 40px; }
.text { margin-top: 10px; max-height: 320px; overflow: auto; background: var(--surface-2); border-radius: 10px; padding: 10px 14px; font: 15px/1.6 var(--font); }
.text p { margin: 0 0 8px; }
.text p.t { font-weight: 700; }
.text p.now { background: var(--accent-soft); border-radius: 6px; }

.bar { height: 8px; background: var(--surface-2); border-radius: 99px; overflow: hidden; margin-top: 10px; }
.bar span { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 99px; transition: width .3s; }
.bar.big { height: 12px; }
.bar.thin { height: 5px; margin-left: 66px; }

.side { position: sticky; top: 12px; display: grid; gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.card h3 { font-size: 19px; }
.card select, .card textarea { margin-bottom: 4px; }
details.card summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
details.card summary::-webkit-details-marker { display: none; }
details.card summary::after { content: "+"; font: 600 20px/1 var(--ui); color: var(--ink-3); }
details.card[open] summary::after { content: "-"; }
details.card[open] summary { margin-bottom: 6px; }
.check { display: flex; align-items: flex-start; gap: 8px; font-size: 15px; padding: 5px 0; cursor: pointer; }
.check input { margin-top: 4px; accent-color: var(--accent); }
input[type="range"] { width: 100%; accent-color: var(--accent); }
.engine { background: var(--surface-2); border-radius: 10px; padding: 10px 12px; margin: 10px 0 4px; font-size: 14px; }
.engine p { margin: 0; }
.engine.ok { background: var(--ok-soft); color: var(--ok); }
.engine.no { background: var(--warn-soft); color: var(--warn); }
.summary { margin: 8px 0 0; color: var(--ink-2); font-size: 15px; }
.progress-text { font-size: 14px; color: var(--ink-2); margin: 8px 0 0; min-height: 1.2em; }
.storage { font-size: 13px; color: var(--ink-3); margin: 14px 0 0; }
code { font-size: 13px; background: var(--surface-2); padding: 1px 5px; border-radius: 5px; }

.how, .faq { margin-top: 44px; max-width: 820px; }
.how h2, .faq h2 { font-size: 26px; margin-bottom: 12px; }
.steps { padding-left: 22px; display: grid; gap: 8px; color: var(--ink-2); }
.faq details { border-top: 1px solid var(--line); padding: 12px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--ink-2); margin: 8px 0 0; }
.foot { max-width: 1180px; margin: 0 auto; padding: 18px 16px 40px; color: var(--ink-3); font-size: 13px; border-top: 1px solid var(--line); }
.foot p { margin: 4px 0; }

@media (max-width: 900px) {
  .work { grid-template-columns: 1fr; }
  .side { position: static; order: -1; }
}
@media (max-width: 560px) {
  .top .back { display: none; }
  .hero { padding-top: 14px; }
  .lead { font-size: 16px; }
  .drop { padding: 20px 14px; }
  .drop-actions .btn { flex: 1 1 100%; }
  .ch-meta, .ch-actions { margin-left: 0; }
  .bar.thin { margin-left: 0; }
  .bookhead { flex-direction: column; }
  .ch-top { flex-wrap: wrap; }
  .ch-top .title { flex: 1 1 calc(100% - 70px); }
  .ch-top .state { margin-left: 64px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }