/* Graphics110 reading site.
   Tokens first (palette and dark block taken verbatim from the html-plan example page,
   reference-example-page.css); everything below reads from them. Light and dark. */
:root {
  --paper: #f6f3ec; --card: #fffdf8; --sunk: #efeadf;
  --ink: #1a1915; --ink-2: #5f5a4f; --ink-3: #948d7f; --line: #ddd5c5; --line-2: #e9e3d6;
  --accent: #d9481f; --accent-soft: #f7ddd2;
  --green: #1f7a52; --green-soft: #d8eee2;
  --amber: #a86b0c; --amber-soft: #f5e6c4;
  --red: #b42318;   --red-soft: #f8d9d5;
  --blue: #2b5fab;  --blue-soft: #d9e4f5;
  --purple: #6b46c1; --purple-soft: #e6ddf7;
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --cjk: "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --col: 740px; --rail: 236px; --r: 10px; --r-sm: 6px;
  --shadow: 0 1px 2px rgba(30,25,15,.06), 0 4px 14px rgba(30,25,15,.06);
  --fig-bg: #fffdf8;            /* diagrams are drawn for a light page: keep them on light paper */
  --topbar: 48px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #141311; --card: #1c1a17; --sunk: #100f0d;
    --ink: #ebe7de; --ink-2: #aaa395; --ink-3: #7a7468; --line: #35322c; --line-2: #29261f;
    --accent: #ef6a43; --accent-soft: #3d221a;
    --green: #4fb587; --green-soft: #173326; --amber: #e0a53a; --amber-soft: #3a2c12;
    --red: #ef6b5f; --red-soft: #3d1c19; --blue: #6f9be0; --blue-soft: #19273d;
    --purple: #a68be8; --purple-soft: #291f42;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 4px 14px rgba(0,0,0,.3);
    --fig-bg: #f3efe6;
  }
}
:root[data-theme="dark"] {
  --paper: #141311; --card: #1c1a17; --sunk: #100f0d;
  --ink: #ebe7de; --ink-2: #aaa395; --ink-3: #7a7468; --line: #35322c; --line-2: #29261f;
  --accent: #ef6a43; --accent-soft: #3d221a;
  --green: #4fb587; --green-soft: #173326; --amber: #e0a53a; --amber-soft: #3a2c12;
  --red: #ef6b5f; --red-soft: #3d1c19; --blue: #6f9be0; --blue-soft: #19273d;
  --purple: #a68be8; --purple-soft: #291f42;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 4px 14px rgba(0,0,0,.3);
  --fig-bg: #f3efe6;
}
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

/* ── base ─────────────────────────────────────────── */
* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); font: 16.5px/1.65 var(--sans); -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body { margin: 0; background: var(--paper); overflow-x: hidden; overflow-x: clip; }
html:lang(zh-CN) { font-family: var(--sans), var(--cjk); }
html:lang(zh-CN) body { line-height: 1.8; }
html:lang(zh-CN) .prose { letter-spacing: .01em; }
@media (prefers-reduced-motion: no-preference) { html.smooth { scroll-behavior: smooth; } }   /* set by site.js after load, so a #anchor on load jumps */
.skip { position: absolute; left: -999px; top: 8px; background: var(--card); padding: 6px 10px; border-radius: var(--r-sm); z-index: 50; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }

/* ── scrollbars: hairline (learner's pick A, evals/runs/scrollbar-2026-10-06) ──
   Every inner scroll surface: a 6px rounded thumb in the rule colour, no track, one step darker on hover.
   The page's own scrollbar stays the browser's. */
.rail .tree, .rail .notes-list, .code pre, .table-wrap, .ga-body pre {
  scrollbar-width: thin; scrollbar-color: var(--line) transparent; }
:is(.rail .tree, .rail .notes-list, .code pre, .table-wrap, .ga-body pre)::-webkit-scrollbar { width: 6px; height: 6px; }
:is(.rail .tree, .rail .notes-list, .code pre, .table-wrap, .ga-body pre)::-webkit-scrollbar-track { background: transparent; }
:is(.rail .tree, .rail .notes-list, .code pre, .table-wrap, .ga-body pre)::-webkit-scrollbar-thumb { background: var(--line); border-radius: 3px; }
:is(.rail .tree, .rail .notes-list, .code pre, .table-wrap, .ga-body pre)::-webkit-scrollbar-thumb:hover { background: var(--ink-3); }
:is(.rail .tree, .rail .notes-list, .code pre, .table-wrap, .ga-body pre)::-webkit-scrollbar-corner { background: transparent; }

/* ── layout: rail + column ────────────────────────── */
.layout { display: grid; grid-template-columns: var(--rail) minmax(0, var(--col)); gap: 56px; justify-content: center;
  max-width: 1180px; margin: 0 auto; padding: 48px 28px 120px; }
.main { min-width: 0; }
.topbar { display: none; }

/* ── rail ─────────────────────────────────────────── */
.rail { position: sticky; top: 28px; align-self: start; max-height: calc(100vh - 56px); display: flex; flex-direction: column;
  font: 13px/1.5 var(--mono); color: var(--ink-2); padding: 0 4px 8px 0; }
.rail > * { flex: none; }
.rail .tree { flex: 0 1 auto; min-height: 96px; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; margin-right: -4px; padding-right: 4px; }
.rail a { color: var(--ink-2); text-decoration: none; }
.rail a:hover { color: var(--ink); }
.rail-home { display: block; font-size: 12px; color: var(--ink-3) !important; margin-bottom: 18px; }
.rail-title { font: 600 15px/1.4 var(--sans); color: var(--ink); margin: 0 0 18px; text-wrap: balance; }
.rail-title + .th { margin-top: 0; }
html:lang(zh-CN) .rail-title { font-family: var(--sans), var(--cjk); }
.rail .th { font-size: 11.5px; letter-spacing: .08em; color: var(--ink-3); margin: 22px 0 8px; }
.tree a, .topic-links a { display: flex; gap: 8px; padding: 2px 0; max-width: 100%; }
.tree a .tx, .topic-links a .tx { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
html:lang(zh-CN) .tree a .tx { font-family: var(--sans), var(--cjk); font-size: 13.5px; }
.tree a.d3 { padding-left: 18px; font-size: 12.5px; }
.tree a .br, .topic-links a .br, .theme-btn .br { color: var(--ink-3); flex: none; }
.tree a.on, .topic-links a.on { color: var(--ink); }
.tree a.on .br { color: var(--accent); }
.tree a.on .tx { font-weight: 600; }
.topic-links a.on .br { color: var(--accent); }
.prog { margin-top: 22px; white-space: nowrap; overflow: hidden; color: var(--ink-3); font-size: 12px; letter-spacing: -.02em; }
.prog b { color: var(--ink); font-weight: 400; }
.prog .pct { color: var(--ink-2); margin-left: 8px; letter-spacing: 0; }
.hint { margin-top: 8px; font-size: 11px; letter-spacing: .06em; color: var(--ink-3); }
.hint .arr { color: var(--ink-2); }
.langs { display: flex; gap: 6px; align-items: baseline; }
.langs a.on { color: var(--ink); font-weight: 600; text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 4px; }
.langs .sep, .langs .off { color: var(--ink-3); }
.theme-btn { display: flex; gap: 8px; font: inherit; color: var(--ink-2); background: none; border: 0; padding: 2px 0; cursor: pointer; }
.theme-btn:hover { color: var(--ink); }

/* ── header ───────────────────────────────────────── */
.doc-head { margin-bottom: 26px; }
.meta { font: 12.5px/1.5 var(--mono); color: var(--ink-3); display: flex; flex-wrap: wrap; align-items: center; gap: 4px 16px; margin: 0 0 14px; }
.meta .kicker { font-weight: 600; text-transform: uppercase; letter-spacing: .16em; color: var(--accent); }
h1 { font-size: clamp(30px, 5vw, 42px); line-height: 1.1; letter-spacing: -.022em; font-weight: 760; margin: 0; text-wrap: balance; }
html:lang(zh-CN) h1 { letter-spacing: 0; line-height: 1.25; }

/* ── prose ────────────────────────────────────────── */
.prose h2 { font-size: 25px; line-height: 1.25; letter-spacing: -.015em; font-weight: 720; margin: 60px 0 14px; padding-top: 18px;
  border-top: 1px solid var(--line); text-wrap: balance; }
.prose h3 { font-size: 18.5px; line-height: 1.35; font-weight: 680; margin: 36px 0 10px; }
.prose h4 { font: 600 13px/1.4 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-2); margin: 26px 0 8px; }
.prose h2, .prose h3, .prose h4, .prose [id] { scroll-margin-top: 20px; }
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { margin: 0 0 18px; padding-left: 24px; }
.prose li { margin: 4px 0; }
.prose li > ul, .prose li > ol { margin: 4px 0; }
.prose li::marker { color: var(--ink-3); }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
strong { font-weight: 650; }
hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }
code, kbd, samp { font-family: var(--mono); font-size: .86em; }
:not(pre) > code { background: var(--sunk); border: 1px solid var(--line-2); border-radius: 5px; padding: 1px 5px; overflow-wrap: break-word; }
blockquote { margin: 0 0 18px; padding: 2px 0 2px 16px; border-left: 3px solid var(--line); color: var(--ink-2); }
img, svg, video { max-width: 100%; height: auto; }
.prose > p > img { display: block; margin: 0 auto; background: var(--fig-bg); border-radius: var(--r-sm); }

/* tables */
.table-wrap { overflow-x: auto; margin: 0 0 20px; border: 1px solid var(--line); border-radius: var(--r); background: var(--card); }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; line-height: 1.5; }
th, td { text-align: left; vertical-align: top; padding: 8px 12px; border-bottom: 1px solid var(--line-2); }
tr:last-child td { border-bottom: 0; }
td { overflow-wrap: break-word; } td code { overflow-wrap: anywhere; }
th { font: 600 11.5px/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--ink-2); background: var(--sunk); border-bottom-color: var(--line); }
html:lang(zh-CN) th { font-family: var(--sans), var(--cjk); font-size: 13px; letter-spacing: .02em; }

/* pills */
.pill { display: inline-block; font: 600 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; padding: 4px 7px;
  border-radius: 99px; background: var(--sunk); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap; }
.pill.green { background: var(--green-soft); color: var(--green); border-color: transparent; }
.pill.amber { background: var(--amber-soft); color: var(--amber); border-color: transparent; }
.pill.accent { background: var(--accent-soft); color: var(--accent); border-color: transparent; }

/* citations and source chips */
a.cite { font: 500 .8em/1 var(--mono); color: var(--accent); text-decoration: none; white-space: nowrap; padding: 0 1px; border-radius: 3px; }
a.cite:hover, a.cite.open { background: var(--accent-soft); }
a.src { font: .84em var(--mono); color: var(--blue); background: var(--blue-soft); border-radius: 5px; padding: 1px 6px;
  text-decoration: none; overflow-wrap: anywhere; }
a.src:hover { text-decoration: underline; }
a.src code { background: none; border: 0; padding: 0; font-size: 1em; }
.pop { position: absolute; z-index: 40; max-width: min(380px, calc(100vw - 24px)); background: var(--card); color: var(--ink);
  border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); padding: 10px 12px 10px 12px;
  font-size: 13.5px; line-height: 1.5; overflow-wrap: anywhere; }
.pop .pop-n { font: 600 11px/1 var(--mono); color: var(--accent); letter-spacing: .06em; display: block; margin-bottom: 4px; }
.pop p { margin: 0 0 6px; } .pop > :last-child { margin-bottom: 0; }

/* references */
ol.refs { font-size: 14.5px; line-height: 1.55; padding-left: 28px; }
ol.refs li { padding: 2px 6px; margin: 2px -6px; border-radius: var(--r-sm); overflow-wrap: anywhere; }
ol.refs li:target { background: var(--accent-soft); }
ol.refs li::marker { font-family: var(--mono); color: var(--accent); }
ul.refs { list-style: none; padding-left: 0; font-size: 14.5px; line-height: 1.55; }
ul.refs li, p.ref { padding: 2px 6px; margin: 2px -6px 6px; border-radius: var(--r-sm); overflow-wrap: anywhere; font-size: 14.5px; line-height: 1.55; }
ul.refs li:target, p.ref:target { background: var(--accent-soft); }
.ref-n { font: 600 .9em var(--mono); color: var(--accent); margin-right: 2px; }
.pop .ref-n { display: none; }

/* figures */
.fig { margin: 26px 0 28px; }
.fig-img { display: block; width: 100%; border: 1px solid var(--line); border-radius: var(--r); background: var(--fig-bg);
  padding: 14px; cursor: zoom-in; }
.fig-img img { display: block; margin: 0 auto; }
.fig figcaption { font-size: 14px; line-height: 1.55; color: var(--ink-2); margin-top: 10px; }
.fig .fig-n { font: 600 11.5px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--accent); margin-right: 6px; }
html:lang(zh-CN) .fig .fig-n { letter-spacing: .04em; }
dialog.lightbox { border: 0; padding: 0; background: transparent; max-width: 96vw; max-height: 96vh; }
dialog.lightbox::backdrop { background: rgba(20,19,17,.94); }
dialog.lightbox img { display: block; max-width: 94vw; max-height: 86vh; width: auto; height: auto; background: var(--fig-bg);
  border-radius: var(--r); padding: 16px; cursor: zoom-out; }
dialog.lightbox p { color: #ebe7de; font-size: 13.5px; line-height: 1.5; text-align: center; margin: 12px auto 0; max-width: 80ch; }
dialog.lightbox p b { font: 600 11.5px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: #ef6a43; margin-right: 6px; }
dialog.lightbox .lb-close { position: fixed; top: 14px; right: 16px; font: 600 13px var(--mono); color: #ebe7de; background: rgba(0,0,0,.35);
  border: 1px solid rgba(255,255,255,.25); border-radius: 99px; padding: 6px 12px; cursor: pointer; }

/* code */
.code { margin: 0 0 20px; border: 1px solid var(--line); border-radius: var(--r); background: var(--card); overflow: hidden; }
.c-head { display: flex; align-items: center; gap: 10px; padding: 6px 8px 6px 12px; font: 12px/1.3 var(--mono); color: var(--ink-2);
  background: var(--sunk); border-bottom: 1px solid var(--line-2); min-height: 34px; }
.c-lang { text-transform: uppercase; letter-spacing: .08em; font-weight: 600; color: var(--ink-3); font-size: 11px; }
.c-file { color: var(--ink); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.c-sp { flex: 1; }
.c-btn { font: 600 11.5px/1 var(--mono); color: var(--ink-2); background: var(--card); border: 1px solid var(--line); border-radius: 6px;
  padding: 5px 8px; cursor: pointer; }
.c-btn:hover { color: var(--ink); border-color: var(--ink-3); }
.c-btn[aria-pressed="true"] { color: var(--accent); border-color: var(--accent); }
.c-btn.done { color: var(--green); border-color: var(--green); }
.code pre { margin: 0; padding: 12px 0; overflow-x: auto; font: 13px/1.6 var(--mono); font-variant-ligatures: none; tab-size: 2; background: none; }
.code code { font-size: 1em; display: block; min-width: max-content; counter-reset: ln; }
.code .line { display: block; padding: 0 16px; min-height: 1.6em; }
.code.numbered .line::before { counter-increment: ln; content: counter(ln); display: inline-block; width: 2.6em; margin: 0 14px 0 -4px;
  text-align: right; color: var(--ink-3); user-select: none; -webkit-user-select: none; }
.code .line.add { background: var(--green-soft); } .code .line.rem { background: var(--red-soft); }
.code .line.hunk { background: var(--sunk); color: var(--ink-3); }
.tk-c { color: var(--ink-3); font-style: italic; } .tk-s { color: var(--green); } .tk-n { color: var(--amber); }
.tk-k { color: var(--purple); font-weight: 500; } .tk-f { color: var(--blue); } .tk-t { color: var(--accent); }

/* self-check answers */
details.answers { margin: 36px 0 22px; border: 1px solid var(--line); border-radius: var(--r); background: var(--card); }
details.answers > summary { list-style: none; cursor: pointer; padding: 12px 16px; display: flex; align-items: center; gap: 10px; }
details.answers > summary::-webkit-details-marker { display: none; }
details.answers > summary::before { content: "▸"; font-family: var(--mono); color: var(--accent); transition: transform .15s; }
details.answers[open] > summary::before { transform: rotate(90deg); }
details.answers > summary h3 { margin: 0; font-size: 17px; }
.answers-body { padding: 0 18px 6px; border-top: 1px solid var(--line-2); padding-top: 14px; }

/* footer */
.doc-foot { margin-top: 72px; border-top: 1px solid var(--line); padding-top: 26px; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.pg { display: flex; flex-direction: column; gap: 4px; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--r); background: var(--card);
  color: var(--ink); text-decoration: none; min-width: 0; }
.pg:hover { border-color: var(--accent); }
.pg.next { text-align: right; }
.pg-k { font: 600 11px/1.3 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--accent); }
.pg-t { font-weight: 650; line-height: 1.35; }
.pg-s { font: 12px/1.4 var(--mono); color: var(--ink-3); }
.chap-nav { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 20px; margin-top: 16px; font-size: 14px; }
.chap-nav a { color: var(--ink-2); }
.in-frame { margin-top: 28px; }
.foot-h { font: 600 11.5px/1.4 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3); margin: 0 0 10px; }
.in-frame ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.in-frame a { display: inline-flex; gap: 8px; align-items: baseline; padding: 6px 10px; border: 1px solid var(--line); border-radius: 99px;
  background: var(--card); color: var(--ink); text-decoration: none; font-size: 14px; }
.in-frame a:hover { border-color: var(--accent); }
.in-frame .n { font: 600 11.5px var(--mono); color: var(--accent); }

/* home */
.home .dek { font-size: 19px; line-height: 1.5; color: var(--ink-2); margin: 0 0 14px; max-width: 62ch; }
.home .start { margin: 0 0 8px; }
.home .rail-home { display: none; }
.stage h2 { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.stage .st-l { font: 600 13px/1 var(--mono); color: var(--accent); letter-spacing: .06em; text-transform: uppercase; }
ol.chapters { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
ol.chapters .ch { display: flex; gap: 14px; margin: 0; padding: 12px 14px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); }
.ch-n { font: 600 13px/1.6 var(--mono); color: var(--accent); flex: none; }
.ch-body { min-width: 0; }
.ch-t { font-size: 16.5px; font-weight: 650; color: var(--ink); text-decoration: none; }
a.ch-t:hover { color: var(--accent); }
.ch-links { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; margin-top: 6px; font: 13px/1.4 var(--mono); }
.ch-links .dot { color: var(--ink-3); }
.ch.planned { background: transparent; border-style: dashed; }
.ch.planned .ch-t, .ch.planned .ch-n { color: var(--ink-3); font-weight: 500; }

/* ── narrow: the rail becomes a top drawer ────────── */
@media (max-width: 900px) {
  .prose h2, .prose h3, .prose h4, .prose [id] { scroll-margin-top: calc(var(--topbar) + 12px); }
  .topbar { display: flex; position: sticky; top: 0; z-index: 30; height: var(--topbar); align-items: center; gap: 12px; padding: 0 16px;
    background: var(--paper); border-bottom: 1px solid var(--line); font: 12.5px/1 var(--mono); }
  .tb-home { color: var(--accent); font-weight: 700; text-decoration: none; }
  .tb-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink-2); font-family: var(--sans), var(--cjk); font-size: 13.5px; }
  .tb-pct { color: var(--ink-3); }
  .tb-toggle { font: 600 12px/1 var(--mono); color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 99px; padding: 7px 11px; cursor: pointer; }
  .layout { display: block; padding: 28px 16px 96px; }
  .rail { position: fixed; z-index: 29; top: var(--topbar); left: 0; right: 0; max-height: min(80vh, calc(100vh - var(--topbar)));
    background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); padding: 16px 16px 20px;
    transform: translateY(-110%); visibility: hidden; transition: transform .2s ease, visibility .2s; }
  body.rail-open .rail { transform: none; visibility: visible; }
  .rail-title, .rail-home, .hint { display: none; }
  .pager { grid-template-columns: 1fr; }
  .pg.next { text-align: left; }
  .prose h2 { font-size: 22px; margin-top: 48px; }
  .home .dek { font-size: 17px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
@media print {
  .rail, .topbar, .c-btn, .doc-foot { display: none !important; }
  .layout { display: block; padding: 0; }
  details.answers { border: 0; }
}

/* archify diagrams: a link from the figure caption to the self-contained interactive page */
.fig-open{display:inline-block;margin-left:.5em;padding:.1em .6em;border:1px solid var(--line);border-radius:999px;font:500 12px/1.6 var(--mono);color:var(--accent);text-decoration:none;white-space:nowrap}
.fig-open:hover,.fig-open:focus-visible{background:var(--accent-soft);border-color:var(--accent)}

/* ── reader notes: g110-note (question blue, comment amber), g110-answer (green), marks, bar, form, rail list ── */
mark.g110-mark { color: inherit; background: var(--blue-soft); border-bottom: 2px solid var(--blue); border-radius: 2px; padding: 0 1px; cursor: pointer;
  scroll-margin-top: 90px; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
mark.g110-mark[data-kind="comment"] { background: var(--amber-soft); border-bottom-color: var(--amber); }
mark.g110-mark mark.g110-mark { border-bottom-style: double; border-bottom-width: 3px; }
g110-note, g110-answer { display: block; }
g110-note { margin: 0 0 18px; padding: 10px 14px 10px; background: var(--card); border: 1px solid var(--line); border-left: 3px solid var(--blue);
  border-radius: var(--r); font-size: 15px; line-height: 1.6; scroll-margin-top: 90px; outline: none; }
g110-note[kind="comment"] { border-left-color: var(--amber); }
g110-note[collapsed] > :not(.gn-head):not(.gn-quote) { display: none; }
g110-note[collapsed] { padding-bottom: 8px; }
.gn-toggle { margin-left: 6px; }
g110-note:focus-visible { box-shadow: 0 0 0 2px var(--accent); }
.gn-head, .gf-head { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; font: 600 11.5px/1.4 var(--mono); letter-spacing: .08em; color: var(--blue); }
g110-note[kind="comment"] .gn-head, .g110-form[data-kind="comment"] .gf-head { color: var(--amber); }
.gn-badge { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--blue-soft); color: var(--blue);
  font: 700 12px/1 var(--mono); letter-spacing: 0; flex: none; }
g110-note[kind="comment"] .gn-badge, .g110-form[data-kind="comment"] .gn-badge { background: var(--amber-soft); color: var(--amber); }
.gn-status { margin-left: auto; font-size: 10px; padding: 3px 6px; }
.gn-status.s-open { background: var(--blue-soft); color: var(--blue); border-color: transparent; }
.gn-status.s-answered, .gn-status.s-incorporated { background: var(--green-soft); color: var(--green); border-color: transparent; }
.gn-quote, .gf-on { display: block; margin: 4px 0 2px; font-size: 13px; color: var(--ink-3); text-decoration: none; overflow-wrap: anywhere; }
.gf-on { display: inline; margin: 0; font: 13px/1.4 var(--sans); letter-spacing: 0; color: var(--ink-3); }
html:lang(zh-CN) .gn-quote, html:lang(zh-CN) .gf-on { font-family: var(--sans), var(--cjk); }
a.gn-quote:hover { color: var(--ink-2); text-decoration: underline; }
.gn-flag { margin: 4px 0 0; font: 12px/1.4 var(--mono); color: var(--amber); }
.gn-flag.other { color: var(--ink-3); }
.gn-text { margin-top: 6px; white-space: pre-wrap; overflow-wrap: anywhere; color: var(--ink); }
.gn-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; margin-top: 8px; font: 12px/1.4 var(--mono); color: var(--ink-3); }
.gn-state { font-style: italic; }
.gn-sync.local { color: var(--amber); }
.gn-sp { flex: 1; }
.gn-btn { font: 600 11.5px/1 var(--mono); color: var(--ink-2); background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 5px 8px; cursor: pointer; }
.gn-btn:hover { color: var(--ink); border-color: var(--ink-3); }
.gn-btn.primary { color: var(--card); background: var(--ink); border-color: var(--ink); }
.gn-btn.primary:hover { background: var(--accent); border-color: var(--accent); }
.gn-btn:disabled { opacity: .5; cursor: default; }
g110-answer { margin: 10px 0 2px; padding: 8px 12px; border: 1px solid var(--line-2); border-left: 3px solid var(--green); border-radius: var(--r-sm); background: var(--paper); }
.ga-head { font: 600 11px/1.4 var(--mono); letter-spacing: .08em; color: var(--green); margin-bottom: 4px; }
.ga-body > :last-child { margin-bottom: 0; }
.ga-body p, .ga-body ul, .ga-body ol { margin: 0 0 8px; }
.ga-body ul, .ga-body ol { padding-left: 20px; }
.ga-body pre { margin: 0 0 8px; padding: 8px 10px; background: var(--sunk); border-radius: var(--r-sm); overflow-x: auto; font: 12.5px/1.5 var(--mono); }
.ga-body pre code { background: none; border: 0; padding: 0; }
.ga-ev { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.ga-ev .src { font-size: 12px; }
g110-note.flash, mark.g110-mark.flash { animation: g110-flash 1.2s ease-out; }
@keyframes g110-flash { 0%, 30% { box-shadow: 0 0 0 3px var(--accent-soft); } 100% { box-shadow: 0 0 0 0 transparent; } }

.g110-bar { position: absolute; z-index: 45; display: flex; gap: 2px; padding: 3px; background: var(--ink); border-radius: 99px; box-shadow: var(--shadow); }
.g110-bar[hidden] { display: none; }
.g110-bar button { font: 600 12.5px/1 var(--sans); color: var(--paper); background: none; border: 0; border-radius: 99px; padding: 7px 11px; cursor: pointer; }
html:lang(zh-CN) .g110-bar button { font-family: var(--sans), var(--cjk); }
.g110-bar button:hover, .g110-bar button:focus-visible { background: rgba(255,255,255,.16); }
.g110-form { margin: 0 0 18px; padding: 10px 14px 12px; background: var(--card); border: 1px solid var(--line); border-left: 3px solid var(--blue); border-radius: var(--r); box-shadow: var(--shadow); }
.g110-form[data-kind="comment"] { border-left-color: var(--amber); }
.g110-form textarea { display: block; width: 100%; margin: 8px 0; padding: 8px 10px; font: 15px/1.5 var(--sans); color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: var(--r-sm); resize: vertical; min-height: 76px; }
html:lang(zh-CN) .g110-form textarea { font-family: var(--sans), var(--cjk); }
.g110-form textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
.gf-row { display: flex; align-items: center; gap: 8px; }
.gf-hint { flex: 1; font: 11.5px/1.3 var(--mono); color: var(--ink-3); }

.rail .notes-list { flex: 0 1 auto; min-height: 0; max-height: 168px; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
.rail .notes-list[hidden], .rail .notes-empty[hidden] { display: none; }
.notes-list a { display: flex; gap: 8px; align-items: baseline; padding: 2px 0; }
.notes-list a .br { color: var(--blue); flex: none; width: 1ch; }
.notes-list a.k-comment .br { color: var(--amber); }
.notes-list a .tx { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; flex: 1; }
html:lang(zh-CN) .notes-list a .tx { font-family: var(--sans), var(--cjk); }
.notes-list a .st { flex: none; font-size: 10.5px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .04em; }
.notes-list a.s-answered .st, .notes-list a.s-incorporated .st { color: var(--green); }
.notes-list a.s-dismissed { opacity: .6; }
.notes-empty { margin: 0; font-size: 11.5px; line-height: 1.45; color: var(--ink-3); }
html:lang(zh-CN) .notes-empty { font-family: var(--sans), var(--cjk); }
.notes-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.notes-btn { font: 600 11px/1 var(--mono); color: var(--ink-2); background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 5px 7px; cursor: pointer; }
.notes-btn:hover { color: var(--ink); border-color: var(--ink-3); }
@media (max-width: 900px) {
  mark.g110-mark, g110-note { scroll-margin-top: calc(var(--topbar) + 60px); }
  .gf-hint { display: none; }
  .rail .notes-list { max-height: 132px; }
}
@media print { .g110-bar, .g110-form, .gn-foot button, .notes-actions { display: none !important; } }

/* the prompt a later Claude session needs, shown while a note waits for an answer */
.notes-hint { margin: 8px 0 0; font-size: 11.5px; line-height: 1.5; color: var(--ink-2); }
.notes-hint[hidden] { display: none; }
html:lang(zh-CN) .notes-hint { font-family: var(--sans), var(--cjk); }
.notes-prompt { font: 600 11px/1.4 var(--mono); color: var(--accent); background: var(--accent-soft); border-radius: 5px; padding: 1px 6px; white-space: nowrap; }
.notes-prompt-copy { padding: 2px 6px; font-size: 10.5px; vertical-align: middle; }
.gn-next { display: block; margin-top: 4px; font-size: 11.5px; color: var(--ink-3); }
html:lang(zh-CN) .gn-next { font-family: var(--sans), var(--cjk); }