/* Standalone study notebooks; tokens match main.css. */
:root {
  color-scheme: light;
  --color-paper: #f7f8f6;
  --color-ink: #222a2e;
  --color-labels: #424d54;
  --color-equipment: #737f86;
  --color-conduit: #52605e;
  --l4-5-tint: #e9edee;
  --l4-5-rail: #bdc6c9;
  --l3-5-tint: #dddfe2;
  --l3-5-rail: #b5b9c0;
  --l3-tint: #edf1ed;
  --l3-rail: #c3cdc3;
  --l2-tint: #dce8e7;
  --l2-rail: #adc2bf;
  --l1-tint: #e9ede2;
  --l1-rail: #c3cab5;
  --l0-tint: #dddfd8;
  --l0-rail: #b7bbae;
  --color-hazard-yellow: #ffcc00;
  --color-alarm-amber: #dda437;
  --color-alarm-ink: #182126;
  --font-ui: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
  --container-max: 1168px;
  --measure-prose: 65ch;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--color-paper); color: var(--color-ink); font: 15.5px/1.6 var(--font-ui); }
h1, h2, h3, p { margin: 0; overflow-wrap: anywhere; }
a { color: inherit; text-underline-offset: 4px; touch-action: manipulation; }
a:hover { text-decoration: underline; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--color-ink); outline-offset: 4px; }
.skip { position: absolute; top: -100px; left: 24px; z-index: 10; padding: 12px 18px; background: var(--color-paper); }
.skip:focus { top: 8px; }
.notes-band { background: var(--l1-tint); border-bottom: 3px solid var(--l1-rail); }
.band-inner { max-width: 1120px; margin: 0 auto; padding: 40px 24px 32px; }
.crumb { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; margin-bottom: 24px; color: var(--color-labels); font: 12px/1.6 var(--font-mono); }
.crumb .sl { color: var(--color-equipment); }
.notes-band h1 { font: 600 40px/1.1 var(--font-ui); letter-spacing: -.02em; }
.doc-sub { margin-top: 12px; font: 19px/1.5 var(--font-body); }
.doc-meta { margin-top: 16px; font: 12px/1.6 var(--font-mono); color: var(--color-labels); }
.doc-summary { max-width: 70ch; margin-top: 16px; font: 17px/1.6 var(--font-body); }
.notes-main { max-width: 1120px; margin: 0 auto; padding: 32px 24px 80px; }
.doc-narrow { max-width: 808px; margin: 0 auto; padding: 32px 24px 80px; }
.callout { margin-bottom: 32px; padding: 4px 0 4px 16px; border-left: 3px solid var(--l1-rail); font: 14px/1.55 var(--font-ui); color: var(--color-labels); }
.page { display: grid; grid-template-columns: minmax(0, 760px) 240px; gap: 64px; }
.notes-body { min-width: 0; grid-column: 1; grid-row: 1; }
.notes-content { overflow-wrap: anywhere; }
.notes-content p { margin-bottom: 20px; }
.domain-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; margin-top: 56px; }
.dnum { font: 600 14px/1.6 var(--font-mono); color: var(--color-ink); font-variant-numeric: tabular-nums; }
.domain-head h2 { font: 600 26px/1.25 var(--font-ui); }
.notes-content .domain-weight { margin: 8px 0 0; font: 12px/1.6 var(--font-mono); color: var(--color-labels); }
.domain-weight b { color: var(--color-ink); font-weight: 600; }
.notes-content hr { border: 0; border-top: 1px solid var(--l1-rail); margin: 12px 0 20px; }
.block-title { font: 600 16px/1.4 var(--font-ui); margin: 28px 0 8px; }
.notes-content ul, .notes-content ol { list-style: none; padding: 0; margin: 0 0 20px; }
.notes-content li { position: relative; padding-left: 14px; margin-top: 6px; font: 15.5px/1.6 var(--font-ui); }
.notes-content li::before { content: "·"; position: absolute; left: 0; color: var(--color-equipment); }
.notes-content li > ul, .notes-content li > ol { margin-bottom: 0; }
.block-title.accent + ul { border-left: 2px solid var(--color-conduit); padding-left: 16px; }
.notes-content code { font: .86em var(--font-mono); border: 1px solid var(--l0-rail); padding: 0 4px; overflow-wrap: anywhere; }
.notes-content pre { max-width: 100%; overflow-x: auto; }
.notes-content pre code { border: 0; padding: 0; overflow-wrap: normal; }
.notes-content img { max-width: 100%; height: auto; }
.notes-content table { display: block; max-width: 100%; overflow-x: auto; }
.toc { grid-column: 2; grid-row: 1; position: sticky; top: 24px; align-self: start; max-height: calc(100vh - 48px); overflow-y: auto; padding: 8px; }
.toc summary { font: 12px/1.6 var(--font-mono); text-transform: uppercase; color: var(--color-labels); cursor: pointer; margin-bottom: 12px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc ul ul { padding-left: 12px; }
.toc a { display: block; border-left: 1px solid var(--l1-rail); padding: 4px 0 4px 12px; font: 13px/1.4 var(--font-ui); color: var(--color-labels); text-decoration: none; overflow-wrap: anywhere; }
.toc a:hover { text-decoration: underline; }
.toc a.active { color: var(--color-ink); font-weight: 600; border-left: 2px solid var(--color-conduit); }
.doc-intro { font: 17px/1.6 var(--font-body); margin-bottom: 32px; }
.doc-intro p + p { margin-top: 20px; }
.section-label { font: 12px/1.6 var(--font-mono); color: var(--color-labels); margin-bottom: 12px; }
.domain-row, .cert-row { display: block; border-top: 1px solid var(--l1-rail); padding: 16px 0; min-height: 44px; text-decoration: none; }
.domain-row:last-child, .cert-row:last-child { border-bottom: 1px solid var(--l1-rail); }
.domain-row:hover, .cert-row:hover { text-decoration: none; }
.domain-row:hover .rowtitle, .cert-row:hover .cert-name { text-decoration: underline; }
.domain-row-title { display: flex; align-items: baseline; gap: 12px; }
.rownum { font: 13px/1.6 var(--font-mono); color: var(--color-conduit); }
.rowtitle { font: 600 18px/1.4 var(--font-ui); }
.rowdesc, .cert-sum { margin-top: 6px; font: 15px/1.6 var(--font-body); color: var(--color-labels); }
.cert-row-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; }
.cert-name { font: 600 20px/1.4 var(--font-ui); }
.cert-status { font: 12px/1.6 var(--font-mono); color: var(--color-labels); }
.cert-full { margin-top: 6px; font: 17px/1.5 var(--font-body); }
.other-topics { display: flex; flex-wrap: wrap; gap: 8px 20px; padding: 16px 0; border-block: 1px solid var(--l1-rail); margin-bottom: 32px; font: 13px/1.6 var(--font-ui); }
.other-topics .section-label { flex-basis: 100%; margin: 0; }
.other-topics .cur { font-weight: 600; }
.notes-footer { border-top: 1px solid var(--l1-rail); margin-top: 48px; padding-top: 16px; font: 13px/1.6 var(--font-mono); }
.notes-footer a { display: inline-flex; align-items: center; min-height: 44px; }
.topic-pagination { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 16px; }
.topic-pagination .next { grid-column: 2; justify-content: flex-end; text-align: right; }
@media (max-width: 959px) {
  .notes-main, .doc-narrow { padding-inline: 16px; }
  .page { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .notes-body { grid-column: 1; grid-row: 2; }
  .toc { position: static; grid-column: 1; grid-row: 1; max-height: none; border: 1px solid var(--color-equipment); padding: 0 12px; }
  .toc summary { min-height: 44px; padding: 12px 0; margin: 0; }
  .toc[open] { padding-bottom: 12px; }
}
@media (max-width: 700px) {
  .band-inner { padding: 24px 16px 20px; }
  .notes-band h1 { font-size: 30px; }
  .doc-sub { font-size: 17px; }
  .domain-head h2 { font-size: 22px; }
}
@media (max-width: 430px) {
  .cert-status { flex-basis: 100%; }
  .topic-pagination { grid-template-columns: minmax(0, 1fr); }
  .topic-pagination .next { grid-column: 1; justify-content: flex-start; text-align: left; }
}