/* No Rush · the long documents: #/rules (rules.js) and #/about (about.js). Shared "doc" layout: an engraved hero
   plate, a sticky contents rail and numbered sections; then each page's own parts. Scoped to .doc. */

.doc { padding: 26px 0 10px; }

/* ---------------------------------------------------------------- hero plate */
.doc .dhero { margin-bottom: 26px; }
.doc .dh-plate {
  position: relative; isolation: isolate; overflow: hidden; border-radius: 6px; padding: 18px 22px;
  border: 1px solid var(--line-2);
  background:
    radial-gradient(60% 90% at 82% 40%, color-mix(in srgb, var(--cyan) 10%, transparent), transparent 64%),
    radial-gradient(50% 70% at 0% 100%, color-mix(in srgb, var(--magenta) 9%, transparent), transparent 64%),
    linear-gradient(162deg, color-mix(in srgb, var(--bg-3) 94%, transparent), color-mix(in srgb, var(--bg-2) 96%, transparent));
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--bg-2) 80%, transparent), 0 0 0 6px var(--line), var(--shadow);
}
.doc .dh-plate > svg.fibres { z-index: -1; opacity: .7; }
.doc .dh-ros { position: absolute; z-index: -1; right: -60px; top: 50%; width: min(460px, 52vw); transform: translateY(-50%); opacity: .55; pointer-events: none; }
.doc .dh-ros svg { animation: docSpin 240s linear infinite; }
@keyframes docSpin { to { transform: rotate(360deg); } }
.doc .dh-plate > .mp-rule { margin: 0 -22px; }
.doc .dh-body { position: relative; padding: 28px 8px 26px; max-width: 760px; }
.doc .dh-kicker { margin: 0; font: 600 11px/1.3 var(--nr-mono); letter-spacing: .24em; text-transform: uppercase; color: var(--accent); }
.doc .dh-title { margin: 12px 0 0; display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; }
.doc .dh-title span {
  font: 900 clamp(46px, 7vw, 92px)/1 var(--font-serif); letter-spacing: .06em;
  background: var(--foil); background-size: 260% 100%; -webkit-background-clip: text; background-clip: text; color: transparent;
  /* the foil drifts in steps (about 6 repaints a second), not on every display frame */
  animation: foil 16s steps(96) infinite; filter: drop-shadow(0 0 22px color-mix(in srgb, var(--cyan) 24%, transparent));
}
:lang(en) .doc .dh-title span, .doc:lang(en) .dh-title span { font-family: var(--nr-display); font-weight: 700; letter-spacing: -.01em; }
.doc .dh-title small { font: 700 13px/1 var(--nr-mono); letter-spacing: .4em; color: var(--muted); }
.doc .dh-lead { margin: 16px 0 0; font-size: 16px; line-height: 1.7; color: var(--ink-2); max-width: 62ch; }
.doc .dh-meta { display: flex; align-items: center; gap: 10px 20px; flex-wrap: wrap; margin-top: 18px; }
.doc .dmeta { display: inline-flex; align-items: baseline; gap: 8px; font-size: 12.5px; min-width: 0; }
.doc .dmeta > span { font: 600 10.5px/1.3 var(--nr-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.doc .dmeta b { font: 600 13px/1.3 var(--nr-mono); color: var(--ink); min-width: 0; overflow-wrap: anywhere; }
.doc .dmeta em { font-style: normal; color: var(--muted); font-family: var(--font-sans); font-weight: 600; }
.doc .dchip {
  display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line-2);
  font: 700 11px/1.2 var(--font-sans); letter-spacing: .06em; background: var(--plate);
}
.doc .dchip i { width: 7px; height: 7px; border-radius: 50%; background: currentColor; box-shadow: 0 0 8px currentColor; }
.doc .dchip-chain { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, transparent); }
.doc .dchip-const { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 45%, transparent); }
.doc .dchip-wait { color: var(--muted); }
.doc .dchip-err { color: var(--err); border-color: var(--err); }
.doc .dh-serial { position: absolute; right: 28px; bottom: 26px; display: grid; justify-items: end; gap: 4px; text-align: right; }
.doc .dh-serial span { font: 600 10px/1 var(--nr-mono); letter-spacing: .22em; text-transform: uppercase; color: var(--muted); }
.doc .dh-serial b { font: 600 17px/1 var(--nr-mono); color: var(--seal); letter-spacing: .08em; text-shadow: 0 0 10px color-mix(in srgb, var(--seal) 50%, transparent); }
.doc .dh-serial b.tba { font: 700 13px/1.2 var(--font-sans); color: var(--muted); text-shadow: none; letter-spacing: .04em; }

/* ---------------------------------------------------------------- layout: rail + main */
.doc .doc-grid { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 34px; align-items: start; }
.doc .doc-rail { position: sticky; top: 86px; display: grid; gap: 16px; }
.doc .doc-toc { display: grid; gap: 2px; padding: 14px 0; border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line); }
.doc .toc-h { font: 700 10.5px/1.3 var(--nr-mono); letter-spacing: .26em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.doc .doc-toc button {
  display: flex; align-items: baseline; gap: 10px; width: 100%; padding: 7px 8px; cursor: pointer; text-align: left; border: 0; border-radius: var(--r);
  background: transparent; color: var(--ink-2); font-size: 14px; transition: color var(--t-fast), background var(--t-fast);
}
.doc .doc-toc button i { font: 600 11px/1 var(--nr-mono); font-style: normal; color: var(--muted); }
.doc .doc-toc button:hover { color: var(--ink); background: var(--plate); }
.doc .doc-toc button.on { color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, transparent); }
.doc .doc-toc button.on i { color: var(--seal); }
.doc .doc-main { min-width: 0; display: grid; gap: 46px; }

/* sections */
.doc .dsec { min-width: 0; scroll-margin-top: 84px; }
.doc .dsec-h { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 14px; }
.doc .dsec-n {
  flex: none; margin-top: 4px; font: 700 13px/1 var(--nr-mono); color: var(--seal); border: 1.5px solid currentColor; padding: 6px 8px 5px; border-radius: 2px;
  transform: rotate(-3deg); text-shadow: 0 0 8px color-mix(in srgb, var(--seal) 50%, transparent);
}
.doc .dsec-t { min-width: 0; flex: 1; }
.doc .dsec-t h2 { margin: 0; font: 800 clamp(24px, 2.6vw, 32px)/1.2 var(--font-serif); letter-spacing: .04em; }
:lang(en) .doc .dsec-t h2, .doc:lang(en) .dsec-t h2 { font-family: var(--nr-display); font-weight: 700; letter-spacing: 0; }
.doc .dsec-t p { margin: 6px 0 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.doc .dsec-t p:empty { display: none; }
.doc .dsec-stamp { flex: none; align-self: center; font-size: 11px; }
.doc .dsec > .mp-rule { margin-bottom: 18px; }
.doc .sub-h { margin: 0 0 10px; font: 700 11px/1.3 var(--nr-mono); letter-spacing: .22em; text-transform: uppercase; color: var(--muted); }
/* a value inside running text: kept on one line when it fits, wrapped (as a unit first) when it does not */
.doc .dv { display: inline-block; max-width: 100%; font: 600 1em/1.35 var(--nr-mono); color: var(--accent); padding: 0 1px; text-indent: 0; }
.doc .dv-ph { color: var(--muted); }
.doc .tba { font-size: 1em; }

/* ---------------------------------------------------------------- rules: articles */
.doc .arts { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.doc .art { display: grid; grid-template-columns: 74px minmax(0, 1fr); gap: 18px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 3px; background: linear-gradient(90deg, var(--plate-2), var(--plate)); }
.doc .art-n { display: grid; justify-items: center; align-content: start; gap: 4px; padding-top: 2px; }
.doc .art-n b { font: 400 40px/1 var(--nr-display); color: transparent; -webkit-text-stroke: 1px color-mix(in srgb, var(--ink-2) 70%, transparent); }
.doc .art-n span { font: 600 9.5px/1.2 var(--nr-mono); letter-spacing: .14em; color: var(--muted); text-transform: uppercase; text-align: center; }
.doc .art-b { min-width: 0; }
.doc .art-b h3 { margin: 0 0 8px; font: 700 17px/1.35 var(--font-sans); }
.doc .art-b p { margin: 0; font-size: 14.5px; line-height: 1.8; color: var(--ink-2); overflow-wrap: anywhere; }
.doc .kchips { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }
.doc .kchip {
  display: inline-flex; align-items: baseline; gap: 8px; padding: 4px 10px; cursor: pointer; border: 1px solid var(--line-2); border-radius: 999px;
  background: color-mix(in srgb, var(--bg) 50%, transparent); color: var(--ink-2); font-size: 12px; max-width: 100%;
}
.doc .kchip code { font: 600 10.5px/1 var(--nr-mono); color: var(--muted); }
.doc .kchip span { font-family: var(--nr-mono); color: var(--ink); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc .kchip:hover { border-color: var(--accent); }

/* rules: the schedule table */
.doc .sch-wrap { overflow-x: auto; border: 1px solid var(--line-2); border-radius: 3px; background: color-mix(in srgb, var(--bg-2) 70%, transparent); }
.doc table.sch { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.doc .sch thead th { position: sticky; top: 0; padding: 10px 14px; text-align: left; font: 700 10.5px/1.3 var(--nr-mono); letter-spacing: .18em; text-transform: uppercase; color: var(--muted); background: var(--bg-3); border-bottom: 1px solid var(--line-2); }
.doc .sch td, .doc .sch tbody th { padding: 11px 14px; border-bottom: 1px dashed var(--line); vertical-align: top; text-align: left; }
.doc .sch tbody th { font-weight: 400; width: 46%; }
.doc .sch tbody th b { display: block; font-size: 14px; color: var(--ink); }
.doc .sch tbody th code { display: inline-block; margin-top: 3px; font: 600 11px/1.3 var(--nr-mono); color: var(--accent); }
.doc .sch tbody th small { display: block; margin-top: 4px; font-size: 12px; line-height: 1.5; color: var(--muted); }
.doc .sch-g th { padding: 12px 14px 8px !important; background: color-mix(in srgb, var(--accent) 6%, transparent); border-bottom: 1px solid var(--line-2) !important; }
.doc .sch-g th span { font: 700 11px/1.3 var(--nr-mono); letter-spacing: .2em; text-transform: uppercase; color: var(--accent); }
.doc .sch-v span { font: 600 14px/1.4 var(--nr-mono); color: var(--ink); }
.doc .sch-v .wan { display: block; font: 500 11.5px/1.4 var(--nr-mono); color: var(--muted); }
.doc .sch-raw code { font: 500 12px/1.4 var(--nr-mono); color: var(--ink-2); word-break: break-all; }
.doc .sch-raw i { font-style: normal; font-size: 11px; color: var(--muted); }
.doc .src { display: inline-block; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line-2); font: 700 10.5px/1.5 var(--font-sans); font-style: normal; white-space: nowrap; }
.doc .src-chain { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, transparent); }
.doc .src-const { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 45%, transparent); }
.doc .src-dep { color: var(--cyan); border-color: color-mix(in srgb, var(--cyan) 45%, transparent); }
.doc .src-na, .doc .src-wait { color: var(--muted); }
.doc .src-err { color: var(--err); border-color: var(--err); }
.doc .sch tr.flash { animation: schFlash 1.6s var(--ease); }
@keyframes schFlash { 0%, 30% { background: color-mix(in srgb, var(--accent) 22%, transparent); } }

/* rules: the worked example */
.doc .ex-lead { margin: 0 0 14px; font-size: 14px; line-height: 1.7; color: var(--ink-2); }
.doc .ex-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.25fr); gap: 16px; align-items: stretch; }
.doc .ex-card, .doc .ex-fig { margin: 0; padding: 16px 18px; border: 1px solid var(--line); border-radius: 3px; background: linear-gradient(180deg, var(--plate-2), var(--plate)); min-width: 0; }
.doc .ex-list { list-style: none; margin: 0 0 14px; padding: 0; display: grid; gap: 6px; font-size: 13.5px; line-height: 1.6; color: var(--ink-2); }
.doc .ex-list:last-child { margin-bottom: 0; }
.doc .ex-list li { padding-left: 14px; position: relative; overflow-wrap: anywhere; }
.doc .ex-list li::before { content: ""; position: absolute; left: 0; top: .7em; width: 6px; height: 1px; background: var(--muted); }
.doc .ex-calc li::before { background: var(--accent); height: 2px; }
.doc .ex-fig figcaption { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; font: 700 11px/1.3 var(--nr-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.doc .ex-fig .lk { width: 18px; height: 2px; background: var(--accent); box-shadow: var(--glow); }
.doc .ch-host { position: relative; min-height: 250px; }
.doc svg.ch { display: block; max-width: 100%; height: auto; overflow: visible; outline: none; }
.doc svg.ch:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.doc .ch-grid line { stroke: var(--line); stroke-width: 1; }
.doc .ch-axis text { fill: var(--muted); font: 500 10px var(--nr-mono); }
.doc .ch-area { fill: color-mix(in srgb, var(--accent) 10%, transparent); stroke: none; }
.doc .ch-line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; filter: drop-shadow(0 0 4px color-mix(in srgb, var(--accent) 60%, transparent)); }
.doc .ch-floor { fill: none; stroke: var(--seal); stroke-width: 1.2; stroke-dasharray: 5 4; }
.doc .ch-quiet { fill: none; stroke: var(--muted); stroke-width: 1.2; stroke-dasharray: 2 4; }
.doc .ch-held { fill: none; stroke: var(--ok); stroke-width: 1.4; }
.doc .ch-hlab { fill: var(--ok); font: 600 10.5px var(--nr-mono); }
.doc .ch-mk { fill: var(--bg); stroke: var(--magenta); stroke-width: 2; }
.doc .ch-lab { fill: var(--ink); font: 700 11px var(--font-sans); }
.doc .ch-flab { fill: var(--seal); font: 600 10px var(--nr-mono); }
.doc .ch-qlab { fill: var(--muted); font: 500 10px var(--font-sans); }
.doc .ch-xl { stroke: var(--ink-2); stroke-width: 1; stroke-dasharray: 2 3; }
.doc .ch-xd { fill: var(--accent); stroke: var(--bg); stroke-width: 2; }
.doc .ch-hit { cursor: crosshair; }
.doc .ch-tip { position: absolute; z-index: 2; pointer-events: none; display: grid; gap: 2px; padding: 6px 10px; border: 1px solid var(--line-2); border-radius: var(--r); background: var(--bg-3); box-shadow: var(--shadow); white-space: nowrap; }
.doc .ch-tip b { font: 600 13px/1.3 var(--nr-mono); color: var(--accent); }
.doc .ch-tip span { font-size: 11.5px; color: var(--muted); }
.doc .ex-tw { margin-top: 16px; overflow-x: auto; border: 1px solid var(--line); border-radius: 3px; }
.doc table.ex-t { width: 100%; border-collapse: collapse; font-size: 13px; }
.doc .ex-t th { padding: 9px 12px; text-align: left; font: 700 10px/1.3 var(--nr-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); background: var(--bg-3); border-bottom: 1px solid var(--line-2); white-space: nowrap; }
.doc .ex-t td { padding: 10px 12px; border-bottom: 1px dashed var(--line); vertical-align: top; color: var(--ink-2); line-height: 1.55; }
.doc .ex-t td.num { font-family: var(--nr-mono); text-align: right; white-space: nowrap; color: var(--ink); }
.doc .ex-t .ex-time { font-family: var(--nr-mono); color: var(--muted); white-space: nowrap; }
.doc .ex-t .ex-who { white-space: nowrap; font-weight: 700; }
.doc .ex-t .who { padding: 1px 8px; border-radius: 999px; border: 1px solid currentColor; font-size: 12px; }
.doc .ex-t .who1 { color: var(--cyan); }
.doc .ex-t .who2 { color: var(--magenta); }
.doc .ex-t .who3 { color: var(--green); }
.doc .ex-t tr.ex-settle td { background: color-mix(in srgb, var(--ok) 7%, transparent); }
.doc .ex-t tr.ex-next td { background: color-mix(in srgb, var(--accent) 5%, transparent); }
.doc .ex-sum { margin: 14px 0 0; font-size: 14px; line-height: 1.75; color: var(--ink-2); }
.doc .ex-warn { display: flex; align-items: center; gap: 12px; margin: 12px 0 0; padding: 10px 14px; border: 1px solid color-mix(in srgb, var(--seal) 55%, transparent); border-radius: var(--r); color: var(--seal); font-weight: 700; font-size: 14px; background: color-mix(in srgb, var(--seal) 7%, transparent); }
.doc .ex-warn b { flex: none; width: 24px; height: 24px; display: grid; place-items: center; border-radius: 50%; border: 2px solid currentColor; font: 900 14px/1 var(--nr-mono); }
.doc .ex-quiet { margin: 10px 0 0; font-size: 13px; color: var(--muted); line-height: 1.7; }

/* rules: the full disclosure certificate (both languages) */
.doc .cert { position: relative; padding: 6px; border: 1px solid var(--line-2); border-radius: 4px; background: repeating-linear-gradient(45deg, color-mix(in srgb, var(--guilloche) 10%, transparent) 0 1px, transparent 1px 6px), var(--bg-2); }
.doc .cert-in { position: relative; display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 20px; padding: 26px 26px 24px; border: 1px solid var(--line); border-radius: 2px; background: color-mix(in srgb, var(--bg-2) 94%, transparent); }
.doc .cert-seal { width: 110px; align-self: start; transform: rotate(-8deg); }
.doc .cert-cols { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 26px; min-width: 0; }
.doc .cert-col { min-width: 0; }
.doc .cert-col h3 { margin: 0 0 10px; padding-bottom: 8px; border-bottom: 1px solid var(--line-2); }
.doc .cert-col h3 span { font: 700 11px/1.3 var(--nr-mono); letter-spacing: .3em; color: var(--accent); }
.doc .cert-col p { margin: 0; font-size: 13.5px; line-height: 1.85; color: var(--ink-2); overflow-wrap: anywhere; }
.doc .cert-col[lang="zh-CN"] p { font-family: var(--font-serif); font-size: 14px; }
.doc .gs-wrap, .doc .det-wrap { margin-top: 22px; }
.doc .gs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: 3px; overflow: hidden; }
.doc .gs-c { display: grid; gap: 6px; padding: 12px 14px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); min-width: 0; background: color-mix(in srgb, var(--bg-2) 60%, transparent); }
.doc .gs-c:nth-child(4n) { border-right: 0; }
.doc .gs-c:nth-last-child(-n + 4) { border-bottom: 0; }
.doc .gs-c > span { font: 600 10px/1.3 var(--nr-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.doc .gs-c > b { font: 600 14px/1.4 var(--nr-mono); color: var(--ink); min-width: 0; overflow-wrap: anywhere; }
.doc .gs-c > b i { font-style: normal; color: var(--muted); font-size: 12px; }
.doc .gs-c > b em { font: 700 13px/1.4 var(--font-sans); font-style: normal; color: var(--muted); }
.doc .gs-eta { display: block; font-size: 12px !important; color: var(--amber) !important; }
.doc .gs-hot > b { color: var(--amber); }
.doc .gs-end > b { color: var(--seal); }
.doc .det { margin: 0; padding: 0 0 0 20px; display: grid; gap: 8px; font-size: 13.5px; line-height: 1.7; color: var(--ink-2); }
.doc .det li::marker { color: var(--seal); font-family: var(--nr-mono); font-weight: 700; }

/* rules: risks */
.doc .risks { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.doc .risk { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 12px; padding: 14px 16px; border: 1px solid var(--line); border-left: 3px solid var(--seal); border-radius: 2px; background: linear-gradient(90deg, color-mix(in srgb, var(--seal) 6%, transparent), transparent 60%); }
.doc .rk-n { font: 700 13px/1 var(--nr-mono); color: var(--seal); padding-top: 3px; }
.doc .risk h3 { margin: 0 0 6px; font: 700 15px/1.35 var(--font-sans); }
.doc .risk p { margin: 0; font-size: 13.5px; line-height: 1.7; color: var(--ink-2); }

/* ---------------------------------------------------------------- about: hero word */
.doc .ab-hero .dh-body { padding-bottom: 30px; }
.doc .ab-word { margin: 6px 0 0; }
.doc .engr {
  position: relative; display: inline-block; font: 900 clamp(84px, 13vw, 168px)/1 var(--font-serif); letter-spacing: .08em; color: transparent;
  -webkit-text-stroke: 1.5px color-mix(in srgb, var(--ink) 75%, transparent);
  background: repeating-linear-gradient(0deg, color-mix(in srgb, var(--cyan) 85%, transparent) 0 1.5px, transparent 1.5px 5px);
  -webkit-background-clip: text; background-clip: text; filter: drop-shadow(0 0 24px color-mix(in srgb, var(--cyan) 30%, transparent));
}
.doc .engr::after {
  content: attr(data-t); position: absolute; left: 0; top: 0; color: transparent; -webkit-text-stroke: 0;
  background: var(--foil); background-size: 300% 100%; -webkit-background-clip: text; background-clip: text; opacity: .55;
  mix-blend-mode: screen; animation: foil 12s steps(72) infinite; clip-path: inset(0 0 52% 0);
}
.doc .ab-pinyin { display: flex; align-items: baseline; gap: 16px; margin: 10px 0 0; }
.doc .ab-pinyin span { font: 400 italic 22px/1 var(--nr-display); color: var(--ink-2); }
.doc .ab-pinyin b { font: 700 13px/1 var(--nr-mono); letter-spacing: .44em; color: var(--muted); }
.doc .ab-dates { margin: 18px 0 0; }

/* about: story and the two posts */
.doc .story { display: grid; gap: 12px; margin-bottom: 20px; }
.doc .story-p { margin: 0; font-size: 15px; line-height: 1.85; color: var(--ink-2); }
.doc .quotes { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.doc .qcard { position: relative; margin: 0; padding: 18px 20px 16px; border: 1px solid var(--line-2); border-radius: 4px; background: linear-gradient(180deg, color-mix(in srgb, var(--bg-3) 92%, transparent), color-mix(in srgb, var(--bg-2) 95%, transparent)); box-shadow: var(--shadow); min-width: 0; }
.doc .q-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding-bottom: 10px; border-bottom: 1px dashed var(--line); }
.doc .q-src { font: 700 12px/1.3 var(--nr-mono); color: var(--ink); }
.doc .q-top time { font: 500 11.5px/1.3 var(--nr-mono); color: var(--muted); }
.doc .q-stamp { margin-left: auto; font: 800 13px/1 var(--nr-mono); color: var(--seal); border: 2px solid currentColor; padding: 4px 7px; border-radius: 3px; transform: rotate(-6deg); }
.doc .q-kind { margin-top: 10px; font: 600 10.5px/1.4 var(--nr-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.doc .q-boldnote { text-transform: none; letter-spacing: .02em; }
.doc .qcard blockquote { margin: 10px 0 0; padding: 0 0 0 14px; border-left: 2px solid var(--accent); }
.doc .qcard blockquote p, .doc .qcard blockquote li { margin: 0 0 8px; font: 400 14.5px/1.7 var(--nr-display); color: var(--ink); overflow-wrap: anywhere; }
.doc .qcard blockquote ul { margin: 0; padding-left: 18px; }
.doc .qcard blockquote strong { color: var(--amber); font-weight: 700; }
.doc .q-gap { color: var(--muted) !important; font-family: var(--nr-mono) !important; font-size: 12px !important; }
.doc .q-tr { margin-top: 12px; padding: 12px 14px; border-radius: 3px; background: color-mix(in srgb, var(--bg) 55%, transparent); border: 1px dashed var(--line); }
.doc .q-lab { display: inline-block; margin-bottom: 6px; font: 600 10px/1.3 var(--nr-mono); letter-spacing: .14em; color: var(--amber); }
.doc .q-tr p { margin: 0 0 6px; font-size: 13.5px; line-height: 1.75; color: var(--ink-2); }
.doc .q-tr strong { color: var(--amber); }
.doc .qcard figcaption { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 12px; font-size: 12.5px; color: var(--muted); }

/* about: the dictionary entry */
.doc .dict { position: relative; padding: 22px 24px; border: 1px solid var(--line-2); border-radius: 3px; background: linear-gradient(180deg, var(--plate-2), var(--plate)); }
.doc .dict-head { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; padding-bottom: 12px; border-bottom: 2px solid var(--line-2); }
.doc .dict-word { font: 900 46px/1 var(--font-serif); letter-spacing: .08em; color: var(--ink); }
.doc .dict-py { font: italic 400 20px/1 var(--nr-display); color: var(--accent); }
.doc .dict-pos { font-size: 13px; color: var(--muted); }
.doc .dict-def { margin: 14px 0 0; font: 700 18px/1.5 var(--font-serif); color: var(--ink); }
.doc .dict-use { margin: 8px 0 0; font-size: 14px; line-height: 1.75; color: var(--ink-2); }
.doc .dict-ex { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 8px; }
.doc .dict-ex li { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; font-size: 15px; }
.doc .dict-ex i { font: 600 11px/1 var(--nr-mono); font-style: normal; color: var(--seal); }
.doc .dict-ex span { font-family: var(--font-serif); color: var(--ink); }
.doc .dict-ex em { font-style: normal; font-size: 13px; color: var(--muted); }
.doc .dict-tie { margin: 16px 0 0; padding-top: 12px; border-top: 1px dashed var(--line); font-size: 14px; line-height: 1.75; color: var(--ink-2); }

/* about: five steps, the timeline and the key grid */
.doc .steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
.doc .step { position: relative; display: grid; align-content: start; gap: 8px; padding: 16px; border: 1px solid var(--line); border-radius: 3px; background: linear-gradient(180deg, var(--plate-2), var(--plate)); min-width: 0; }
.doc .step-top { display: flex; align-items: center; justify-content: space-between; }
.doc .step-n { font: 400 34px/1 var(--nr-display); color: transparent; -webkit-text-stroke: 1px color-mix(in srgb, var(--ink-2) 70%, transparent); }
.doc .step-ic svg { width: 44px; height: 44px; fill: none; stroke: var(--accent); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; filter: drop-shadow(0 0 6px color-mix(in srgb, var(--accent) 40%, transparent)); }
.doc .step-ic .ic-f, .doc .bird .ic-f { fill: currentColor; }
.doc .step-ic svg { color: var(--accent); }
.doc .ic-thin { stroke-width: 1 !important; opacity: .7; }
.doc .ic-hair { stroke-width: .6 !important; opacity: .5; }
.doc .step-k { font: 600 10px/1.3 var(--nr-mono); letter-spacing: .2em; text-transform: uppercase; color: var(--seal); }
.doc .step h3 { margin: 0; font: 700 16px/1.35 var(--font-sans); }
.doc .step p { margin: 0; font-size: 13px; line-height: 1.7; color: var(--ink-2); overflow-wrap: anywhere; }
.doc .gate-dg { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 16px; margin-top: 16px; }
.doc .tl-fig, .doc .kg-fig { margin: 0; padding: 16px 18px; border: 1px solid var(--line); border-radius: 3px; background: color-mix(in srgb, var(--bg-2) 70%, transparent); min-width: 0; }
.doc .tl { display: flex; align-items: stretch; gap: 3px; margin-top: 6px; min-height: 92px; }
.doc .tl-seg { position: relative; min-width: 72px; display: grid; align-content: end; gap: 4px; padding: 10px 10px 10px; border-top: 4px solid var(--line-2); font-size: 12px; }
.doc .tl-seg b { font-size: 12.5px; color: var(--ink); line-height: 1.35; }
.doc .tl-seg span, .doc .tl-seg code { font-size: 11.5px; color: var(--muted); }
.doc .tl-seg code { font-family: var(--nr-mono); color: var(--accent); }
.doc .tl-act { flex: 0 0 auto; border-top-color: var(--seal); }
.doc .tl-act::before { content: ""; position: absolute; left: 0; top: -9px; width: 14px; height: 14px; border-radius: 50%; background: var(--seal); box-shadow: 0 0 10px var(--seal); }
.doc .tl-notice { border-top-color: var(--amber); background: repeating-linear-gradient(-45deg, color-mix(in srgb, var(--amber) 12%, transparent) 0 8px, transparent 8px 16px); }
.doc .tl-exec { border-top-color: var(--cyan); background: color-mix(in srgb, var(--cyan) 8%, transparent); }
.doc .tl-exp { flex: 0 0 auto; border-top-color: var(--muted); border-top-style: dashed; opacity: .75; }
.doc .kg { display: grid; grid-template-columns: repeat(32, minmax(0, 1fr)); gap: 2px; margin-top: 6px; }
.doc .kg i { aspect-ratio: 1; border-radius: 1px; background: color-mix(in srgb, var(--muted) 20%, transparent); }
.doc .kg i.u { background: var(--foil); background-size: 400% 400%; }
.doc .kg i.n { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.doc .kg-cap { display: flex; align-items: center; gap: 8px 14px; flex-wrap: wrap; margin: 10px 0 0; font-size: 12px; color: var(--muted); }
.doc .kg-cap > b { color: var(--ink); font-weight: 700; }
.doc .kg-cap > b.tba { color: var(--muted); }
.doc .kg-l { display: inline-flex; align-items: center; gap: 5px; }
.doc .kg-l i { width: 10px; height: 10px; border-radius: 1px; background: color-mix(in srgb, var(--muted) 20%, transparent); }
.doc .kg-l i.u { background: var(--foil); }
.doc .kg-l i.n { background: var(--accent); }

/* about: the canary */
.doc .cn-grid { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 22px; align-items: start; }
.doc .cn-art { padding: 14px; border: 1px solid var(--line); border-radius: 3px; background: radial-gradient(circle at 50% 60%, color-mix(in srgb, var(--amber) 12%, transparent), transparent 70%); }
.doc .bird { width: 100%; height: auto; fill: none; stroke: var(--amber); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; color: var(--amber); filter: drop-shadow(0 0 8px color-mix(in srgb, var(--amber) 45%, transparent)); }
.doc .bird-b { transform-box: view-box; transform-origin: 80px 96px; animation: birdBreath 3.8s ease-in-out infinite; }
@keyframes birdBreath { 50% { transform: scale(1.03, .98) translateY(-1px); } }
.doc .cn-text p { margin: 0 0 12px; font-size: 14.5px; line-height: 1.8; color: var(--ink-2); }
.doc .cn-live { margin-top: 16px; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: 3px; overflow: hidden; }
.doc .cl-r { display: grid; gap: 6px; padding: 12px 14px; border-right: 1px solid var(--line); min-width: 0; background: color-mix(in srgb, var(--bg-2) 60%, transparent); }
.doc .cl-r:last-child { border-right: 0; }
.doc .cl-r > span { font: 600 10px/1.3 var(--nr-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.doc .cl-r > b { font: 600 13px/1.4 var(--nr-mono); color: var(--ink); min-width: 0; overflow-wrap: anywhere; }
.doc .cl-r > b em { font: 700 13px/1.4 var(--font-sans); font-style: normal; color: var(--muted); }
.doc .cl-r a { font-size: 12px; word-break: break-all; }
.doc .cn-ok { color: var(--ok); }
.doc .cn-trip { color: var(--seal); }

/* about: addresses */
.doc .addrs { display: grid; border: 1px solid var(--line-2); border-radius: 3px; overflow: hidden; }
.doc .ad-r { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); gap: 16px; align-items: center; padding: 11px 16px; border-bottom: 1px dashed var(--line); background: color-mix(in srgb, var(--bg-2) 55%, transparent); }
.doc .ad-r:last-child { border-bottom: 0; }
.doc .ad-k { font-size: 13.5px; color: var(--ink-2); min-width: 0; }
.doc .ad-k i { margin-left: 8px; font: 600 10px/1 var(--nr-mono); font-style: normal; letter-spacing: .1em; color: var(--muted); padding: 2px 6px; border: 1px solid var(--line); border-radius: 999px; white-space: nowrap; }
.doc .ad-v { display: flex; align-items: center; gap: 10px; min-width: 0; }
.doc .ad-v a.mono { font-size: 12.5px; min-width: 0; overflow-wrap: anywhere; word-break: break-all; }
.doc .ad-v em { font-style: normal; color: var(--muted); font-weight: 600; font-size: 13px; }
.doc .ad-tba { opacity: .85; }
.doc .cp { flex: none; height: 26px; padding: 0 10px; cursor: pointer; border: 1px solid var(--line-2); border-radius: 999px; background: transparent; color: var(--ink-2); font: 600 11px/1 var(--font-sans); }
.doc .cp:hover { border-color: var(--accent); color: var(--accent); }

/* about: the notice */
.doc .notice-plate { position: relative; display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 6px 24px; align-items: center; padding: 28px 30px; border: 2px solid color-mix(in srgb, var(--seal) 60%, transparent); border-radius: 4px; background: repeating-linear-gradient(-45deg, color-mix(in srgb, var(--seal) 5%, transparent) 0 10px, transparent 10px 20px), var(--bg-2); }
.doc .np-seal { grid-row: span 2; width: 110px; transform: rotate(-10deg); }
.doc .np-main { margin: 0; font: 700 17px/1.75 var(--font-serif); color: var(--ink); }
.doc .np-more { margin: 0; font-size: 13px; line-height: 1.6; color: var(--muted); }

/* ---------------------------------------------------------------- daylight */
:root[data-theme="day"] .doc .dh-title span { background: none; color: var(--ink); filter: none; animation: none; }
:root[data-theme="day"] .doc .engr { -webkit-text-stroke-color: rgba(21, 19, 15, .7); background: repeating-linear-gradient(0deg, rgba(31, 58, 95, .75) 0 1.5px, transparent 1.5px 5px); -webkit-background-clip: text; background-clip: text; filter: none; }
:root[data-theme="day"] .doc .engr::after { mix-blend-mode: multiply; opacity: .35; }
:root[data-theme="day"] .doc .dh-plate { background: radial-gradient(60% 90% at 82% 40%, rgba(31, 58, 95, .06), transparent 64%), linear-gradient(162deg, #f8f4ea, #efe8d7); }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 1180px) {
  .doc .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .doc .cn-live { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .doc .cl-r:nth-child(3) { border-right: 0; }
  .doc .cl-r:nth-child(n + 4) { border-top: 1px solid var(--line); }
}
@media (max-width: 980px) {
  .doc .doc-grid { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .doc .doc-rail { position: static; }
  .doc .doc-toc { display: flex; gap: 4px; overflow-x: auto; padding: 8px 0; scrollbar-width: none; }
  .doc .doc-toc::-webkit-scrollbar { display: none; }
  .doc .toc-h { display: none; }
  .doc .doc-toc button { width: auto; flex: none; white-space: nowrap; }
  .doc .rail-src { display: none; }
  .doc .ex-grid, .doc .quotes, .doc .gate-dg { grid-template-columns: minmax(0, 1fr); }
  .doc .cert-cols { grid-template-columns: minmax(0, 1fr); }
  .doc .gs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .doc .gs-c:nth-child(4n) { border-right: 1px solid var(--line); }
  .doc .gs-c:nth-child(2n) { border-right: 0; }
  .doc .gs-c:nth-last-child(-n + 4) { border-bottom: 1px solid var(--line); }
  .doc .gs-c:nth-last-child(-n + 2) { border-bottom: 0; }
}
@media (max-width: 760px) {
  .doc { padding-top: 14px; }
  .doc .dh-plate { padding: 12px 14px; }
  .doc .dh-plate > .mp-rule { margin: 0 -14px; }
  .doc .dh-body { padding: 20px 2px 70px; }
  .doc .dh-ros { right: -110px; width: 320px; opacity: .4; }
  .doc .dh-lead { font-size: 14.5px; }
  .doc .dh-serial { right: 16px; bottom: 22px; }
  .doc .doc-main { gap: 36px; }
  .doc .dsec-h { gap: 10px; flex-wrap: wrap; }
  .doc .dsec-stamp { order: 3; margin-left: 0; }
  .doc .art { grid-template-columns: minmax(0, 1fr); gap: 6px; padding: 14px; }
  .doc .art-n { display: flex; align-items: baseline; gap: 10px; justify-items: start; }
  .doc .art-n b { font-size: 28px; }
  /* tables become cards */
  .doc .sch-wrap { overflow: visible; border: 0; background: none; }
  .doc table.sch, .doc .sch tbody, .doc .sch tr, .doc .sch th, .doc .sch td { display: block; width: auto; }
  .doc .sch thead { display: none; }
  .doc .sch tbody { margin-bottom: 10px; border: 1px solid var(--line-2); border-radius: 3px; overflow: hidden; background: color-mix(in srgb, var(--bg-2) 70%, transparent); }
  .doc .sch tbody tr:not(.sch-g) { padding: 10px 12px; border-bottom: 1px dashed var(--line); }
  .doc .sch tbody tr:last-child { border-bottom: 0; }
  .doc .sch td, .doc .sch tbody th { padding: 0; border: 0; width: auto; }
  .doc .sch tbody tr:not(.sch-g) td { display: flex; justify-content: space-between; gap: 12px; margin-top: 6px; align-items: baseline; }
  .doc .sch tbody tr:not(.sch-g) td::before { content: attr(data-label); font: 600 10px/1.4 var(--nr-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); flex: none; }
  .doc .sch-v { flex-wrap: wrap; }
  .doc .sch-v .wan { display: inline; }
  .doc .sch-raw code { text-align: right; }
  .doc .ex-tw { overflow: visible; border: 0; }
  .doc table.ex-t, .doc .ex-t tbody, .doc .ex-t tr, .doc .ex-t td { display: block; width: auto; }
  .doc .ex-t thead { display: none; }
  .doc .ex-t tr { margin-bottom: 8px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 3px; }
  .doc .ex-t td { padding: 3px 0; border: 0; display: flex; justify-content: space-between; gap: 12px; text-align: right; }
  .doc .ex-t td::before { content: attr(data-label); font: 600 10px/1.6 var(--nr-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); text-align: left; flex: none; }
  .doc .ex-t td.ex-what { display: block; text-align: left; padding: 6px 0; }
  .doc .ex-t td.ex-what::before { display: block; margin-bottom: 2px; }
  .doc .ex-t td.num { white-space: normal; }
  .doc .cert-in { grid-template-columns: minmax(0, 1fr); padding: 18px 16px; }
  .doc .cert-seal { width: 84px; }
  .doc .risks { grid-template-columns: minmax(0, 1fr); }
  .doc .risk { grid-template-columns: 34px minmax(0, 1fr); padding: 12px; }
  .doc .engr { font-size: clamp(76px, 26vw, 110px); }
  .doc .steps { grid-template-columns: minmax(0, 1fr); }
  .doc .tl { flex-wrap: wrap; }
  .doc .tl-seg { flex-basis: 40% !important; flex-grow: 1 !important; min-width: 0; }
  .doc .kg { grid-template-columns: repeat(16, minmax(0, 1fr)); }
  .doc .cn-grid { grid-template-columns: minmax(0, 1fr); }
  .doc .cn-art { max-width: 240px; }
  .doc .cn-live { grid-template-columns: minmax(0, 1fr); }
  .doc .cl-r { border-right: 0; border-top: 1px solid var(--line); }
  .doc .cl-r:first-child { border-top: 0; }
  .doc .ad-r { grid-template-columns: minmax(0, 1fr); gap: 4px; padding: 10px 12px; }
  .doc .notice-plate { grid-template-columns: minmax(0, 1fr); padding: 20px 16px; }
  .doc .np-seal { grid-row: auto; width: 84px; }
  .doc .np-main { font-size: 15px; }
  .doc .gs { grid-template-columns: minmax(0, 1fr); }
  .doc .gs-c, .doc .gs-c:nth-child(2n), .doc .gs-c:nth-child(4n) { border-right: 0; border-bottom: 1px solid var(--line); }
  .doc .gs-c:last-child { border-bottom: 0; }
  .doc .dict { padding: 18px 16px; }
  .doc .dict-word { font-size: 38px; }
}
@media (prefers-reduced-motion: reduce) {
  .doc .dh-ros svg, .doc .dh-title span, .doc .engr::after, .doc .bird-b, .doc .sch tr.flash { animation: none !important; }
}