/* ATXNG — paper-and-ink bench notes.
   System fonts only: no external requests of any kind from any page. */

:root {
  --paper:   #f7f3ec;
  --paper-2: #f0eade;
  --ink:     #23201c;
  --ink-2:   #57514a;
  --ink-3:   #857d72;
  --rule:    #ddd4c4;
  --rule-2:  #c8bda8;
  --live:    #a8491a;
  --alt:     #2c6660;
  --warn:    #8a5a12;

  --sch-rule: #6d7684;
  --sch-fill: #f2ede4;
  --sch-ink:  #23201c;
  --sch-live: #b4531a;
  --sch-alt:  #2f6f6a;
  --sch-dim:  #9c9488;

  --serif: ui-serif, Charter, "Bitstream Charter", "Iowan Old Style", Georgia, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --col: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:   #171512;
    --paper-2: #1e1b17;
    --ink:     #e8e2d6;
    --ink-2:   #b3ab9c;
    --ink-3:   #8a8275;
    --rule:    #332e27;
    --rule-2:  #4a4238;
    --live:    #d2762f;
    --alt:     #58a49c;
    --warn:    #c69543;

    --sch-rule: #7d8694;
    --sch-fill: #22201d;
    --sch-ink:  #e8e2d6;
    --sch-live: #d2762f;
    --sch-alt:  #58a49c;
    --sch-dim:  #6f685d;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.62;
}

.col { width: 100%; max-width: var(--col); margin-inline: auto; padding-inline: 26px; }

a { color: var(--live); text-underline-offset: 2.5px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

.jump {
  position: absolute; left: -9999px;
  background: var(--ink); color: var(--paper); padding: 10px 16px;
}
.jump:focus { left: 12px; top: 12px; z-index: 20; }

/* ── masthead ─────────────────────────────────────────────── */

.masthead { border-bottom: 2px solid var(--ink); background: var(--paper); }
.masthead__row {
  display: flex; align-items: baseline; gap: 22px;
  padding-block: 17px 14px; flex-wrap: wrap;
}
.wordmark {
  font-family: var(--font-mono); font-size: 21px; letter-spacing: -0.4px;
  color: var(--ink); text-decoration: none; flex: none;
}
.wordmark b { font-weight: 700; }
.wordmark span { color: var(--live); font-weight: 400; }
.masthead__tag {
  margin: 0; flex: 1 1 220px; color: var(--ink-3);
  font-size: 13.5px; font-style: italic; font-family: var(--serif);
}
.masthead__nav { display: flex; gap: 20px; flex: none; }
.masthead__nav a {
  color: var(--ink-2); text-decoration: none; font-size: 14px;
  font-family: var(--font-mono); padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.masthead__nav a:hover { color: var(--ink); border-bottom-color: var(--live); }

/* ── home ─────────────────────────────────────────────────── */

.opener { padding-block: 58px 40px; }
.opener h1 {
  font-family: var(--serif); font-weight: 600; font-size: clamp(30px, 4.6vw, 46px);
  line-height: 1.16; letter-spacing: -0.6px; margin: 0 0 26px; max-width: 20ch;
}
.opener__lede {
  max-width: 68ch; margin: 0 0 15px; color: var(--ink-2); font-size: 17px;
}

.band { padding-block: 34px; border-top: 1px solid var(--rule); }
.band__head {
  font-family: var(--font-mono); font-size: 12.5px; text-transform: uppercase;
  letter-spacing: 1.4px; color: var(--ink-3); font-weight: 500; margin: 0 0 16px;
}
.briefs { display: grid; grid-template-columns: repeat(auto-fit, minmax(238px, 1fr)); gap: 30px; }
.brief h3 { font-family: var(--serif); font-size: 20px; margin: 0 0 7px; font-weight: 600; }
.brief h3 a { color: var(--ink); text-decoration: none; }
.brief h3 a:hover { color: var(--live); }
.brief p { margin: 0 0 7px; color: var(--ink-2); font-size: 15px; }
.brief__count {
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-3);
  text-transform: uppercase; letter-spacing: 0.8px;
}

/* ── tables (the visual identity) ─────────────────────────── */

.scroller { overflow-x: auto; margin-block: 16px; }
table.ledger { width: 100%; border-collapse: collapse; font-size: 15px; }
table.ledger th {
  text-align: left; font-family: var(--font-mono); font-weight: 500; font-size: 11.5px;
  text-transform: uppercase; letter-spacing: 1px; color: var(--ink-3);
  border-bottom: 1.5px solid var(--rule-2); padding: 0 14px 8px 0; white-space: nowrap;
}
table.ledger td { border-bottom: 1px solid var(--rule); padding: 13px 14px 13px 0; vertical-align: top; }
table.ledger tr:last-child td { border-bottom: none; }
.t-slug a { font-weight: 600; text-decoration: none; font-size: 16px; }
.t-slug a:hover { text-decoration: underline; }
.t-stand { display: block; color: var(--ink-3); font-size: 13.8px; margin-top: 3px; max-width: 56ch; }
.t-sec, .t-num { white-space: nowrap; font-family: var(--font-mono); font-size: 13px; color: var(--ink-2); }

.risk { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }
.risk--mid { color: var(--warn); }
.risk--high { color: var(--live); font-weight: 500; }

.pill {
  display: inline-block; font-family: var(--font-mono); font-size: 11.5px;
  border: 1px solid var(--rule-2); border-radius: 2px; padding: 1px 6px;
  margin: 0 4px 4px 0; color: var(--ink-2); white-space: nowrap;
}

/* ── generic page ─────────────────────────────────────────── */

.page { padding-block: 46px 72px; }
.page h1 { font-family: var(--serif); font-size: clamp(28px, 3.6vw, 38px); margin: 0 0 14px; font-weight: 600; letter-spacing: -0.4px; }
.page__lede { max-width: 66ch; color: var(--ink-2); margin: 0 0 30px; font-size: 16.5px; }
.group { margin-bottom: 44px; }
.group h2 { font-family: var(--serif); font-size: 23px; margin: 0 0 5px; font-weight: 600; }
.group__desc { margin: 0; color: var(--ink-3); font-size: 15px; max-width: 62ch; }
.page h2 { font-family: var(--serif); font-size: 23px; margin: 34px 0 10px; font-weight: 600; }

/* ── note ─────────────────────────────────────────────────── */

.doc { display: grid; grid-template-columns: minmax(0, 1fr) 246px; gap: 52px; padding-block: 40px 76px; align-items: start; }
.doc__head { border-bottom: 1px solid var(--rule); padding-bottom: 22px; margin-bottom: 30px; }
.kicker { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 1.2px; color: var(--ink-3); margin: 0 0 12px; }
.kicker a { color: var(--ink-3); text-decoration: none; }
.kicker a:hover { color: var(--live); }
.kicker .sep { opacity: 0.45; margin-inline: 4px; }
.doc__head h1 { font-family: var(--serif); font-size: clamp(29px, 3.9vw, 41px); line-height: 1.18; letter-spacing: -0.5px; margin: 0 0 12px; font-weight: 600; }
.doc__stand { font-family: var(--serif); font-size: 19px; font-style: italic; color: var(--ink-2); margin: 0 0 16px; max-width: 60ch; }
.doc__stamp { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-3); margin: 0; }

.doc__prose { max-width: 70ch; }
.doc__prose h2 { font-family: var(--serif); font-size: 25px; font-weight: 600; margin: 42px 0 12px; letter-spacing: -0.2px; scroll-margin-top: 20px; }
.doc__prose h3 { font-family: var(--serif); font-size: 19.5px; font-weight: 600; margin: 30px 0 9px; scroll-margin-top: 20px; }
.doc__prose p { margin: 0 0 15px; }
.doc__prose > p.standfirst { font-family: var(--serif); font-size: 19px; font-style: italic; color: var(--ink-2); margin-bottom: 26px; }
.doc__prose ul, .doc__prose ol { margin: 0 0 16px; padding-left: 1.35em; }
.doc__prose li { margin-bottom: 6px; }
.doc__prose dl { margin: 0 0 16px; }
.doc__prose dt { font-family: var(--font-mono); font-size: 14px; color: var(--ink); margin-top: 12px; }
.doc__prose dd { margin: 3px 0 0; padding-left: 1.35em; color: var(--ink-2); }
.doc__prose code { font-family: var(--font-mono); font-size: 0.88em; background: var(--paper-2); border: 1px solid var(--rule); border-radius: 2px; padding: 0.5px 4px; }

.permalink { float: right; color: var(--rule-2); text-decoration: none; font-weight: 400; opacity: 0; margin-left: 10px; }
h2:hover .permalink, h3:hover .permalink, .permalink:focus { opacity: 1; }

.srcname {
  font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-3);
  margin: 18px 0 0; padding-bottom: 5px; border-bottom: 1px solid var(--rule);
}
.srcname + .listing { margin-top: 0; }

pre.listing {
  font-family: var(--font-mono); font-size: 13.2px; line-height: 1.58;
  background: var(--paper-2); border: 1px solid var(--rule);
  border-left: 3px solid var(--rule-2);
  padding: 14px 16px; overflow-x: auto; margin: 18px 0; tab-size: 4;
}
pre.listing code { background: none; border: none; padding: 0; font-size: inherit; }
pre.listing--out { border-left-color: var(--alt); color: var(--ink-2); }

aside.flag {
  border-left: 3px solid var(--rule-2); background: var(--paper-2);
  padding: 13px 17px; margin: 22px 0; font-size: 15.3px;
}
aside.flag p { margin: 0 0 9px; }
aside.flag p:last-child { margin-bottom: 0; }
aside.flag--risk { border-left-color: var(--live); }
aside.flag--bench { border-left-color: var(--alt); }

figure.schematic { margin: 30px 0; }
figure.schematic svg { width: 100%; height: auto; display: block; }
figure.schematic figcaption {
  font-family: var(--font-mono); font-size: 12.3px; color: var(--ink-3);
  margin-top: 10px; padding-top: 8px; border-top: 1px solid var(--rule);
}

.doc__prose .scroller table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.doc__prose .scroller th {
  text-align: left; font-family: var(--font-mono); font-weight: 500; font-size: 11.5px;
  text-transform: uppercase; letter-spacing: 0.9px; color: var(--ink-3);
  border-bottom: 1.5px solid var(--rule-2); padding: 0 12px 7px 0;
}
.doc__prose .scroller td { border-bottom: 1px solid var(--rule); padding: 10px 12px 10px 0; vertical-align: top; }

/* ── rail ─────────────────────────────────────────────────── */

.rail { position: sticky; top: 22px; font-size: 14px; }
.rail__box { margin-bottom: 26px; }
.rail__box h2 {
  font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase;
  letter-spacing: 1.1px; color: var(--ink-3); font-weight: 500;
  margin: 0 0 9px; padding-bottom: 6px; border-bottom: 1px solid var(--rule);
}
.outline { display: flex; flex-direction: column; }
.outline a {
  color: var(--ink-2); text-decoration: none; padding: 4px 0;
  font-size: 13.8px; line-height: 1.4; border-bottom: 1px solid transparent;
}
.outline a:hover { color: var(--live); }
ul.tight { list-style: none; margin: 0; padding: 0; }
ul.tight li { font-family: var(--font-mono); font-size: 12.6px; color: var(--ink-2); padding: 3px 0; }

.seqrow { display: flex; gap: 18px; margin-top: 52px; padding-top: 22px; border-top: 1px solid var(--rule); flex-wrap: wrap; }
.seq { flex: 1 1 210px; text-decoration: none; color: var(--ink); font-family: var(--serif); font-size: 17px; }
.seq span { display: block; font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: 1px; color: var(--ink-3); margin-bottom: 4px; }
.seq--next { text-align: right; }
.seq:hover { color: var(--live); }

/* ── endmatter ────────────────────────────────────────────── */

.endmatter { border-top: 2px solid var(--ink); margin-top: 40px; }
.endmatter__row { padding-block: 26px 40px; }
.endmatter__note { max-width: 64ch; color: var(--ink-2); font-size: 14.6px; margin: 0 0 14px; }
.endmatter__meta { font-family: var(--font-mono); font-size: 12.2px; color: var(--ink-3); margin: 0; }

/* ── responsive ───────────────────────────────────────────── */

@media (max-width: 940px) {
  .doc { grid-template-columns: minmax(0, 1fr); gap: 34px; }
  .rail { position: static; border-top: 1px solid var(--rule); padding-top: 22px; }
  .rail__box { margin-bottom: 20px; }
}
@media (max-width: 620px) {
  body { font-size: 16px; }
  .col { padding-inline: 18px; }
  .masthead__row { gap: 12px; }
  .masthead__tag { display: none; }
  .masthead__nav { gap: 14px; width: 100%; }
  .doc__prose { max-width: none; }
}

@media print {
  .masthead__nav, .rail, .seqrow, .jump { display: none; }
  body { font-size: 11pt; }
  .doc { grid-template-columns: 1fr; }
}