:root {
  --bg: #f3f5f8;
  --panel: #ffffff;
  --panel-2: #eef1f6;
  --ink: #1a1f2b;
  --ink-2: #475066;
  --muted: #687287;
  --line: #dfe3ec;
  --accent: #2b4f8a;
  --accent-ink: #ffffff;
  --accent-soft: #e3eaf7;
  --gold: #c98a12;
  --mark: #ffe28a;
  --mark-ink: #2a2105;
  --ok: #1d7a46;
  --ok-soft: #e3f3e9;
  --warn: #9a5b00;
  --warn-soft: #fbf0dc;
  --bad: #b3261e;
  --bad-soft: #fbe6e4;
  --shadow: 0 1px 2px rgba(20, 30, 30, .06), 0 6px 20px rgba(20, 30, 30, .06);
  --radius: 14px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #10131a;
  --panel: #181c25;
  --panel-2: #1f2430;
  --ink: #e7ebf3;
  --ink-2: #c0c8d8;
  --muted: #8d97ab;
  --line: #2c3342;
  --accent: #8fb3f0;
  --accent-ink: #0d1422;
  --accent-soft: #1d2a42;
  --gold: #f2b84b;
  --mark: #6b5310;
  --mark-ink: #fff6d6;
  --ok: #6fd39a;
  --ok-soft: #173326;
  --warn: #f0b860;
  --warn-soft: #3a2c12;
  --bad: #ff8a80;
  --bad-soft: #3d1e1c;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.55 var(--font);
}
a { color: var(--accent); }
button, input, textarea { font: inherit; color: inherit; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--panel); padding: 8px 12px; border-radius: 8px; z-index: 50; }
.skip:focus { left: 12px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* header */
.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top-in { max-width: 1240px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 12px; }
.brand { display: flex; align-items: center; gap: 9px; color: var(--ink); text-decoration: none; font-weight: 700; letter-spacing: -.01em; }
.brand-mark { width: 28px; height: 28px; color: var(--ink); }
.mark-dot { fill: var(--accent); }
.top-nav { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.ghost-link { color: var(--ink-2); text-decoration: none; font-size: 14px; padding: 6px 8px; }
.ghost-link:hover { color: var(--ink); }
.credits { font-size: 13px; color: var(--ink-2); background: var(--panel-2); border: 1px solid var(--line); padding: 4px 10px; border-radius: 999px; white-space: nowrap; }

/* buttons */
.btn { appearance: none; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); padding: 9px 16px; border-radius: 10px; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; line-height: 1.2; }
.btn:hover:not(:disabled) { filter: brightness(1.08); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.small { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.ghost:hover:not(:disabled) { background: var(--accent-soft); filter: none; }
.icon-btn { appearance: none; border: 1px solid var(--line); background: var(--panel); width: 34px; height: 34px; border-radius: 9px; display: inline-grid; place-items: center; cursor: pointer; color: var(--ink-2); }
.icon-btn svg { width: 17px; height: 17px; }
.link-btn { appearance: none; border: 0; background: none; color: var(--accent); cursor: pointer; padding: 2px 4px; font-size: 13px; font-weight: 600; }
.link-btn:hover { text-decoration: underline; }

/* layout */
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 16px 40px; }
.intro { padding: 26px 0 18px; max-width: 820px; }
.intro h1 { font-family: var(--serif); font-size: clamp(26px, 4vw, 38px); line-height: 1.12; margin: 0 0 10px; letter-spacing: -.015em; font-weight: 700; }
.lede { margin: 0 0 14px; color: var(--ink-2); font-size: 16px; }
.lede strong { color: var(--ink); }
.intro-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.grid { display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 18px; align-items: start; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.panel-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px 6px; }
.panel-head h2 { margin: 0; font-size: 15px; letter-spacing: .02em; text-transform: uppercase; color: var(--ink-2); }

/* library */
.library { padding-bottom: 12px; position: sticky; top: 66px; max-height: calc(100vh - 80px); overflow: auto; }
.drop { margin: 8px 16px 10px; border: 1.5px dashed color-mix(in srgb, var(--accent) 55%, var(--line)); border-radius: 12px; padding: 18px 12px; display: grid; justify-items: center; gap: 2px; text-align: center; cursor: pointer; background: color-mix(in srgb, var(--accent-soft) 45%, transparent); transition: background .15s; }
.drop svg { width: 26px; height: 26px; color: var(--accent); margin-bottom: 4px; }
.drop:hover, .drop.over { background: var(--accent-soft); }
.drop-main { font-weight: 600; }
.drop-sub { font-size: 12.5px; color: var(--muted); }
.paste { margin: 0 16px 8px; }
.paste summary, .history summary, .preview summary { cursor: pointer; font-size: 13.5px; color: var(--ink-2); font-weight: 600; padding: 4px 0; }
.field-label { display: block; font-size: 12.5px; color: var(--muted); margin: 8px 0 4px; font-weight: 600; }
input[type="text"], input[type="url"], select, textarea { width: 100%; background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; padding: 8px 10px; resize: vertical; }
input[type="text"]:focus, input[type="url"]:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.row-end { display: flex; justify-content: flex-end; margin-top: 8px; }
.busy { margin: 4px 16px; font-size: 13px; color: var(--ink-2); }
.busy::before { content: ""; display: inline-block; width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--accent); border-right-color: transparent; margin-right: 8px; animation: spin .8s linear infinite; vertical-align: -1px; }
@keyframes spin { to { transform: rotate(360deg); } }
.doc-list { list-style: none; margin: 4px 0 0; padding: 0 10px; }
.doc { display: grid; grid-template-columns: 30px minmax(0, 1fr) auto; gap: 8px; align-items: start; padding: 8px 6px; border-radius: 9px; }
.doc + .doc { border-top: 1px solid var(--line); }
.doc-kind { font-size: 10px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; width: 30px; height: 34px; border-radius: 5px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.doc-kind.pdf { background: var(--bad-soft); color: var(--bad); }
.doc-kind.docx { background: #e3ecfb; color: #2457b3; }
:root[data-theme="dark"] .doc-kind.docx { background: #1b2a44; color: #9dbcf5; }
.doc-name { font-weight: 600; font-size: 14px; overflow-wrap: anywhere; line-height: 1.3; }
.doc-meta { font-size: 12.5px; color: var(--muted); }
.doc-warn { font-size: 12.5px; color: var(--warn); margin-top: 2px; }
.doc-x { appearance: none; border: 0; background: none; color: var(--muted); cursor: pointer; font-size: 18px; line-height: 1; padding: 2px 6px; border-radius: 6px; }
.doc-x:hover { color: var(--bad); background: var(--bad-soft); }
.lib-stats { margin: 6px 16px 0; }
.settings { display: grid; gap: 4px; margin: 10px 16px 0; padding-top: 10px; border-top: 1px solid var(--line); }
.setting { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.setting .field-label { margin: 0; }
.seg { display: inline-flex; background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; padding: 2px; }
.seg-btn { appearance: none; border: 0; background: none; padding: 4px 10px; border-radius: 7px; cursor: pointer; font-size: 13px; color: var(--ink-2); }
.seg-btn.on { background: var(--panel); color: var(--ink); box-shadow: 0 1px 2px rgba(0, 0, 0, .12); font-weight: 600; }
.history { margin: 12px 16px 0; padding-top: 10px; border-top: 1px solid var(--line); }
.count { color: var(--muted); font-weight: 500; }
.hist-list { list-style: none; margin: 6px 0 0; padding: 0; }
.hist { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px; padding: 7px 0; border-top: 1px solid var(--line); }
.hist-open { appearance: none; border: 0; background: none; text-align: left; cursor: pointer; padding: 0; }
.hist-title { display: block; font-size: 13.5px; font-weight: 600; color: var(--ink); line-height: 1.3; }
.hist-sub { display: block; font-size: 12px; color: var(--muted); }

/* chat */
.chat { display: flex; flex-direction: column; min-height: 560px; }
.chat-tools { display: flex; gap: 6px; flex-wrap: wrap; }
.thread { padding: 6px 18px 10px; flex: 1; }
.empty { text-align: center; padding: 60px 10px 40px; max-width: 460px; margin: 0 auto; }
.empty-title { font-family: var(--serif); font-size: 21px; margin: 0 0 6px; }
.turn { padding: 14px 0 18px; border-bottom: 1px solid var(--line); }
.turn:last-child { border-bottom: 0; }
.q { display: flex; justify-content: flex-end; margin-bottom: 10px; }
.q-bubble { background: var(--accent); color: var(--accent-ink); padding: 9px 14px; border-radius: 14px 14px 4px 14px; max-width: 85%; overflow-wrap: anywhere; white-space: pre-wrap; }
.a { background: var(--panel-2); border: 1px solid var(--line); border-radius: 4px 14px 14px 14px; padding: 12px 16px 12px; }
.a-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
.pill { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 700; padding: 2px 9px; border-radius: 999px; letter-spacing: .01em; }
.pill.answered { background: var(--ok-soft); color: var(--ok); }
.pill.partial { background: var(--warn-soft); color: var(--warn); }
.pill.not_found { background: var(--panel); color: var(--ink-2); border: 1px solid var(--line); }
.pill.example { background: var(--accent-soft); color: var(--accent); }
.a-meta { font-size: 12px; color: var(--muted); margin-left: auto; }
.prose { font-family: var(--serif); font-size: 16.5px; line-height: 1.62; }
.prose p { margin: 0 0 10px; }
.prose ul, .prose ol { margin: 0 0 10px; padding-left: 22px; }
.prose li { margin: 2px 0; }
.prose code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .86em; background: var(--panel); padding: 1px 4px; border-radius: 4px; }
.uncited { text-decoration: underline dotted var(--warn); text-underline-offset: 3px; }
.cite { appearance: none; border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent); background: var(--accent-soft); color: var(--accent); font: 700 11.5px/1 var(--font); padding: 2px 5px 3px; border-radius: 6px; cursor: pointer; vertical-align: 2px; margin-left: 2px; }
.cite:hover, .cite.active { background: var(--accent); color: var(--accent-ink); }
.cite.bad { border-color: var(--bad); color: var(--bad); background: var(--bad-soft); cursor: help; }
.streaming { white-space: pre-wrap; color: var(--ink-2); }
.caret::after { content: ""; display: inline-block; width: 7px; height: 15px; background: var(--accent); margin-left: 2px; vertical-align: -2px; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.notes { margin: 8px 0 0; padding: 8px 10px; border-radius: 9px; background: var(--warn-soft); color: var(--warn); font-size: 13px; }
.notes p { margin: 0; }
.notes p + p { margin-top: 3px; }
.sources { display: grid; gap: 7px; margin-top: 10px; }
.src { appearance: none; text-align: left; width: 100%; display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 8px; align-items: start; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; cursor: pointer; }
.src:hover { border-color: var(--accent); }
.src-n { font-weight: 800; font-size: 12px; color: var(--accent); background: var(--accent-soft); border-radius: 6px; height: 22px; display: grid; place-items: center; }
.src-loc { display: block; font-size: 12.5px; color: var(--muted); overflow-wrap: anywhere; }
.src-q { display: block; font-size: 13.5px; color: var(--ink); margin-top: 1px; }
.src-v { font-size: 11.5px; font-weight: 700; margin-left: 4px; }
.src-v.exact { color: var(--ok); }
.src-v.close { color: var(--warn); }
.src-v.missing, .src-v.unknown_source { color: var(--bad); }
.a-actions { display: flex; gap: 4px 10px; flex-wrap: wrap; margin-top: 10px; align-items: center; }
.follow { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.chip { appearance: none; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 5px 11px; border-radius: 999px; cursor: pointer; font-size: 13px; text-align: left; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.free::before { content: "Free"; font-size: 10.5px; font-weight: 800; color: var(--accent); background: var(--accent-soft); border-radius: 999px; padding: 1px 6px; margin-right: 6px; }
.sent { margin-top: 8px; font-size: 13px; }
.sent summary { cursor: pointer; color: var(--muted); }
.sent ol { margin: 6px 0 0; padding-left: 22px; }
.sent li { margin: 3px 0; }
.sent .snip { color: var(--muted); }
.partial-note { margin-top: 8px; font-size: 13px; color: var(--bad); }

.progress { background: var(--panel-2); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.progress-top { display: flex; justify-content: space-between; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
.stages { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.stage { font-size: 13.5px; color: var(--muted); display: flex; gap: 8px; align-items: center; }
.stage::before { content: ""; width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--line); flex: none; }
.stage.on { color: var(--ink); }
.stage.on::before { border-color: var(--accent); border-right-color: transparent; animation: spin .8s linear infinite; }
.stage.done { color: var(--ink-2); }
.stage.done::before { background: var(--accent); border-color: var(--accent); }

.suggest { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 18px 10px; }
.composer { position: sticky; bottom: 0; background: var(--panel); border-top: 1px solid var(--line); padding: 12px 16px 14px; border-radius: 0 0 var(--radius) var(--radius); }
.composer textarea { font-size: 15.5px; min-height: 52px; }
.composer-row { display: flex; gap: 12px; align-items: center; justify-content: space-between; margin-top: 8px; }
.meter { margin: 0; color: var(--muted); }
.preview { margin-top: 6px; }
.preview-list { margin: 6px 0 0; padding-left: 22px; font-size: 13px; max-height: 220px; overflow: auto; }
.preview-list li { margin: 3px 0; }
.preview-list .snip { color: var(--muted); }
.gate { margin: 8px 0 0; padding: 8px 10px; border-radius: 9px; background: var(--accent-soft); color: var(--ink); font-size: 13.5px; }
.gate.warn { background: var(--warn-soft); color: var(--warn); }

/* how */
.how { margin-top: 28px; max-width: 900px; }
.how h2 { font-family: var(--serif); font-size: 22px; margin: 0 0 8px; }
.steps { margin: 0; padding-left: 20px; color: var(--ink-2); display: grid; gap: 6px; }
.steps strong { color: var(--ink); }

/* viewer */
.viewer { position: fixed; top: 0; right: 0; bottom: 0; width: min(460px, 100%); background: var(--panel); border-left: 1px solid var(--line); box-shadow: -10px 0 30px rgba(0, 0, 0, .14); z-index: 40; display: flex; flex-direction: column; }
.viewer-head { display: flex; gap: 10px; align-items: flex-start; justify-content: space-between; padding: 16px 16px 6px; }
.viewer-head h3 { margin: 0; font-size: 16px; overflow-wrap: anywhere; }
.viewer-head p { margin: 2px 0 0; }
.viewer-kicker { font-size: 12px; font-weight: 800; color: var(--accent); text-transform: uppercase; letter-spacing: .05em; }
.match-note { margin: 0 16px; padding: 6px 10px; border-radius: 8px; background: var(--panel-2); color: var(--ink-2); }
.match-note.exact { background: var(--ok-soft); color: var(--ok); }
.match-note.miss { background: var(--warn-soft); color: var(--warn); }
.viewer-body { flex: 1; overflow: auto; padding: 12px 16px; font-family: var(--serif); font-size: 16px; line-height: 1.65; white-space: pre-wrap; overflow-wrap: anywhere; }
.viewer-body .ctx { color: var(--muted); }
.viewer-body .ctx-label { display: block; font: 600 11.5px/1.4 var(--font); color: var(--muted); text-transform: uppercase; letter-spacing: .05em; margin: 10px 0 4px; }
mark { background: var(--mark); color: var(--mark-ink); border-radius: 3px; padding: 1px 0; box-shadow: 0 0 0 2px var(--mark); }
.viewer-foot { display: flex; gap: 8px; flex-wrap: wrap; padding: 10px 16px 16px; border-top: 1px solid var(--line); }
.scrim { position: fixed; inset: 0; background: rgba(0, 0, 0, .28); z-index: 35; }

.toasts { position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%); display: grid; gap: 8px; z-index: 60; width: min(560px, calc(100% - 32px)); }
.toast { background: var(--ink); color: var(--bg); padding: 10px 14px; border-radius: 10px; font-size: 14px; box-shadow: var(--shadow); transition: opacity .4s; }
.toast.err { background: var(--bad); color: #fff; }
.toast a { color: inherit; font-weight: 700; margin-left: 8px; }
.toast.gone { opacity: 0; }

.foot { max-width: 1240px; margin: 0 auto; padding: 18px 16px 34px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); }
.foot p { margin: 4px 0; }

@media (max-width: 900px) {
  .grid { grid-template-columns: minmax(0, 1fr); }
  .library { position: static; max-height: none; }
  .chat { min-height: 420px; }
}
@media (max-width: 560px) {
  .hide-sm { display: none; }
  .top-in { gap: 6px; padding: 8px 12px; }
  .brand span { font-size: 15px; }
  .wrap { padding: 0 12px 30px; }
  .thread { padding: 4px 12px 8px; }
  .composer { padding: 10px 12px 12px; }
  .a { padding: 10px 12px; }
  .prose { font-size: 16px; }
  .q-bubble { max-width: 92%; }
  .viewer { top: auto; height: 78vh; width: 100%; border-left: 0; border-top: 1px solid var(--line); border-radius: 16px 16px 0 0; }
  .credits { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* docs pages (api.html, tokens.html) */
.docpage { max-width: 880px; margin: 0 auto; padding: 24px 16px 40px; }
.docpage h1 { font-family: var(--serif); font-size: clamp(26px, 4vw, 34px); line-height: 1.15; margin: 8px 0 12px; }
.docpage h2 { font-size: 19px; margin: 28px 0 8px; }
.docpage h3 { font-size: 16px; margin: 18px 0 6px; }
.docpage code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .88em; background: var(--panel-2); padding: 1px 5px; border-radius: 5px; }
.docpage pre { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; overflow: auto; font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; margin: 0; }
.docpage pre code { background: none; padding: 0; }
.docpage table { border-collapse: collapse; width: 100%; font-size: 14px; margin: 8px 0; }
.docpage th, .docpage td { border-bottom: 1px solid var(--line); text-align: left; padding: 6px 8px; vertical-align: top; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; overflow-wrap: anywhere; }
.statebox { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.statebox p { margin: 4px 0 0; }
.tokenbox { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; overflow-wrap: anywhere; }
.tokenrow { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
.codegroup { margin: 10px 0 16px; }
.tabs { display: flex; flex-wrap: wrap; gap: 2px; margin-bottom: -1px; }
.tab { appearance: none; border: 1px solid var(--line); border-bottom: 0; background: var(--panel); color: var(--ink-2); padding: 5px 10px; border-radius: 8px 8px 0 0; cursor: pointer; font-size: 12.5px; }
.tab.active { background: var(--panel-2); color: var(--ink); font-weight: 700; }
.codegroup pre { border-top-left-radius: 0; }

/* --- Ask the Web additions --- */
select { font: inherit; color: inherit; }
.library > .setting { display: block; margin: 0 16px 10px; }
.library > .setting .field-label { display: block; }
.library > .setting select { display: block; width: 100%; max-width: 100%; margin-top: 4px; }
.doc-kind.wiki { background: var(--accent-soft); color: var(--accent); font-family: var(--serif); font-size: 15px; text-transform: none; }
.doc-kind.paste { background: var(--panel-2); color: var(--ink-2); }
a.doc-name { display: block; color: var(--ink); text-decoration: none; }
a.doc-name:hover { color: var(--accent); text-decoration: underline; }
.doc-snip { font-size: 12.5px; color: var(--ink-2); margin-top: 2px; line-height: 1.4; }
.src-site { display: block; font-size: 11.5px; color: var(--muted); }
.composer-btns { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.viewer-lic { margin: 6px 0 0; }
.viewer-foot a.btn { text-decoration: none; }
@media (max-width: 560px) {
  .composer-row { flex-direction: column; align-items: stretch; }
  .composer-btns { justify-content: stretch; }
  .composer-btns .btn { flex: 1 1 auto; }
}