:root {
  color-scheme: light;
  --stone: #cdc5b7;
  --paper: #e6dfd2;
  --ink: #302c30;
  --muted: #514950;
  --violet: #5a3f68;
  --lavender: #bfabc9;
  --wash: #d7cbdc;
  --rule: #8c7f85;
  --display: "Bitter", "Rockwell", "DejaVu Serif", Georgia, serif;
  --reading: "Seravek", "Trebuchet MS", Calibri, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: auto; text-size-adjust: 100%; }
body { margin: 0; background: var(--stone); color: var(--ink); font: 1.125rem/1.6 var(--reading); }
button, select { font: inherit; }
button, select, summary, a { -webkit-tap-highlight-color: transparent; }
a { color: var(--violet); text-underline-offset: .2em; text-decoration-thickness: .07em; overflow-wrap: anywhere; }
a:hover { text-decoration-thickness: .13em; }
a:focus-visible, button:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid var(--violet); outline-offset: 4px; }
button { cursor: pointer; }
svg { display: block; max-width: 100%; }
figure, dl, dd { margin: 0; }
p { margin: 0 0 1rem; }
ul { padding: 0; margin: 0; }
li { list-style: none; }
h1, h2, h3 { margin: 0; font-family: var(--display); font-weight: 650; line-height: 1.16; text-wrap: balance; }
h1 { font-size: clamp(2.45rem, 5.1vw, 4.75rem); letter-spacing: -.035em; max-width: 20ch; }
h2 { font-size: clamp(1.8rem, 3vw, 2.55rem); max-width: 26ch; letter-spacing: -.022em; }
h3 { font-size: clamp(1.35rem, 2vw, 1.6rem); }
strong { font-weight: 700; }
.u-wrap { width: min(100% - 2.5rem, 74rem); margin-inline: auto; }
.u-measure { max-width: 67ch; }
.u-flow > * + * { margin-top: 1.25rem; }
.u-hide { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.paper-skip { position: absolute; z-index: 20; top: .5rem; left: 1rem; transform: translateY(-180%); padding: .6rem 1rem; min-height: 44px; background: var(--paper); }
.paper-skip:focus { transform: translateY(0); }
.mast { padding-block: 1.1rem; border-bottom: 2px solid var(--ink); }
.mast__line { position: relative; display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1.25rem; justify-content: space-between; }
.mast__home { display: inline-flex; min-height: 48px; align-items: center; gap: .7rem; color: var(--ink); font: 600 1.3rem/1.2 var(--display); text-decoration: none; }
.fold-glyph { width: 35px; height: 35px; color: var(--violet); flex: 0 0 auto; }
.note-menu { position: static; width: 100%; }
.note-menu > summary { display: flex; gap: 1.5rem; align-items: center; justify-content: space-between; min-height: 48px; padding: .55rem .85rem; border: 1.5px solid var(--ink); border-radius: 0; cursor: pointer; list-style: none; font-weight: 600; }
.note-menu > summary::-webkit-details-marker { display: none; }
.note-menu > summary::after { content: "+"; font: 400 1.6rem/1 var(--display); }
.note-menu[open] > summary::after { content: "−"; }
.note-menu__sheet { position: static; width: 100%; margin-top: .6rem; padding: 1.5rem; background: var(--paper); border: 2px solid var(--ink); box-shadow: 7px 7px 0 var(--lavender); }
.note-menu__sheet p { font-family: var(--display); font-weight: 600; margin-block: .25rem .5rem; }
.note-menu__sheet ul + p { margin-top: 1.3rem; }
.note-menu__sheet a { display: flex; min-height: 46px; align-items: center; gap: 1rem; border-bottom: 1px solid var(--rule); text-decoration: none; padding: .4rem 0; }
.note-menu__sheet a[aria-current="page"]::after { content: "•"; margin-left: auto; }
.frontispiece { padding-block: 2.5rem 2rem; }
.frontispiece__label { margin: 0 0 1.25rem; color: var(--violet); font-weight: 650; font-size: 1.0625rem; }
.frontispiece__intro { font-size: 1.2rem; line-height: 1.55; max-width: 62ch; margin-block: 1.5rem 0; }
.frontispiece__deck { max-width: 45ch; margin: 1.3rem 0 0; }
.frontispiece__drawing { margin-top: 2.25rem; }
.door-diagram { background: var(--lavender); border-radius: 50% 50% 0 0 / 35% 35% 0 0; border: 2px solid var(--violet); padding: 3.5rem 1.5rem 1.5rem; max-width: 29rem; margin-inline: auto; }
.door-diagram figcaption { font: 650 1.6rem/1.25 var(--display); text-align: center; margin: 0 auto 1.6rem; max-width: 12ch; }
.question-path { padding-inline: .5rem; }
.question-path li { padding: 1rem 0 1rem 1.5rem; border-left: 2px solid var(--violet); position: relative; }
.question-path li::before { content: ""; width: .65rem; height: .65rem; position: absolute; background: var(--ink); left: -.39rem; top: 1.65rem; transform: rotate(45deg); }
.question-path li:last-child { padding-bottom: .5rem; }
.question-path span { display: block; font: 600 1.35rem/1.25 var(--display); margin-bottom: .25rem; }
.question-path p { font-size: 1.0625rem; margin: 0; }
.section-map { padding: 1.2rem 0 2.5rem; }
.section-map details { border-top: 1.5px solid var(--rule); border-bottom: 1.5px solid var(--rule); }
.section-map summary { min-height: 48px; cursor: pointer; padding: .6rem 0; font-weight: 600; }
.section-map ul { padding-bottom: .75rem; }
.section-map a { display: flex; align-items: center; min-height: 44px; padding-block: .3rem; max-width: 65ch; }
.ribbon-jump { display: grid; gap: .6rem; margin-bottom: 1.4rem; max-width: 47rem; }
.ribbon-jump label { font-weight: 600; }
.ribbon-jump__controls { display: flex; flex-wrap: wrap; gap: .5rem; }
.ribbon-jump select { width: 100%; min-height: 48px; border: 1.5px solid var(--ink); border-radius: 0; background: var(--paper); color: var(--ink); padding: .5rem .6rem; }
.ribbon-jump button { min-height: 48px; border: 1.5px solid var(--ink); background: var(--ink); color: var(--paper); border-radius: 0; padding: .5rem 1rem; }
.notebook-section { border-top: 2px solid var(--ink); padding: 2.8rem 0 3rem; scroll-margin-top: 1.5rem; }
.notebook-section:focus { outline: none; }
.section-title { display: flex; align-items: flex-start; gap: .9rem; margin-bottom: 1.75rem; }
.section-title .fold-glyph { width: 27px; height: 27px; margin-top: .45rem; }
.lexicon { display: grid; gap: 2rem; margin-top: 2rem; }
.word-entry { border-top: 6px solid var(--violet); padding: 1.2rem 0 0; }
.word-entry h3 { font: 650 2rem/1.2 var(--display); margin: 0 0 .8rem; }
.word-entry > div { max-width: 52ch; }
dfn { font-style: normal; }
.word-entry a { display: inline-flex; align-items: center; min-height: 48px; padding-block: .5rem; }
.note-checks { max-width: 68ch; }
.note-checks li { padding: .25rem 0 1.1rem 2rem; position: relative; }
.note-checks li::before { content: ""; border: 1.7px solid var(--violet); width: .8rem; height: .8rem; position: absolute; left: .15rem; top: .75rem; }
.note-checks strong { color: var(--ink); }
.margin-note { color: var(--muted); font-size: 1.0625rem; line-height: 1.55; max-width: 64ch; margin: .75rem 0 0; padding-left: 1rem; border-left: 4px solid var(--lavender); }
.linked-notes { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; margin-top: 1.25rem; }
.linked-notes a { display: inline-flex; min-height: 48px; align-items: center; padding-block: .5rem; }
.claim-pairs { display: grid; gap: 2rem; }
.claim-pair { display: grid; gap: .7rem; }
.claim-pair + .claim-pair { border-top: 1px solid var(--rule); padding-top: 2rem; }
.claim-pair dt { font: 600 1.2rem/1.4 var(--display); color: var(--violet); }
.claim-pair dd { max-width: 68ch; }
.claim-pair__claim { margin: 0; font-size: 1.1875rem; }
.source-link { display: block; font-size: 1rem; line-height: 1.4; margin: .75rem 0 0; }
.source-link span { display: block; color: var(--muted); }
.source-link a { display: inline-flex; align-items: center; min-height: 44px; padding-block: .4rem; }
.definition-slip { background: var(--paper); border-radius: 5rem 5rem 0 0; padding: 2.8rem 1.5rem 1.6rem; max-width: 53rem; }
.definition-slip h3 { font: 650 2rem/1.25 var(--display); margin-bottom: 1rem; }
.definition-slip > div > p:first-child { font-size: 1.25rem; max-width: 54ch; }
.route-windows { display: grid; gap: 1.4rem; }
.route-window { background: var(--wash); border-radius: 7rem 7rem 0 0; padding: 3.2rem 1.5rem 1.6rem; }
.route-window h3 { font: 650 1.65rem/1.2 var(--display); max-width: 18ch; margin-bottom: 1.2rem; }
.route-window > div { max-width: 57ch; }
.quote-sheet { max-width: 65rem; border-top: 6px solid var(--violet); }
.quote-sheet > div { border-bottom: 1px solid var(--rule); padding: 1rem .15rem; display: grid; gap: .4rem; }
.quote-sheet dt { font: 600 1.3rem/1.4 var(--display); }
.quote-sheet dd { max-width: 57ch; }
.qa-record { max-width: 68ch; padding: 1.5rem 0; border-bottom: 1px solid var(--rule); }
.qa-record:first-child { padding-top: 0; }
.qa-record h3 { margin-bottom: .85rem; }
.qa-record__answer { margin: 0; }
.help-slip { border-left: 6px solid var(--violet); padding: 1.4rem; background: var(--paper); max-width: 63ch; }
.help-slip > p:first-child { font-weight: 600; }
.return-strip { display: grid; gap: .7rem; padding-block: 2rem; border-top: 2px solid var(--ink); }
.return-strip span { font-size: 1.0625rem; color: var(--muted); }
.return-strip a { display: inline-flex; align-items: center; gap: 1.3rem; min-height: 52px; width: fit-content; font: 600 1.6rem/1.35 var(--display); }
.return-strip a::after { content: "→"; }
.colophon { padding-block: 2rem; background: var(--paper); border-top: 1.5px solid var(--ink); font-size: 1rem; }
.colophon__line { display: grid; gap: 1rem; }
.colophon p { max-width: 62ch; margin: 0; }
.colophon nav { display: flex; flex-wrap: wrap; gap: .3rem 1.5rem; }
.colophon a { display: inline-flex; align-items: center; min-height: 46px; padding-block: .5rem; }
.lost-note { min-height: 45vh; padding-bottom: 3rem; }

@media (min-width: 42rem) {
  body { font-size: 1.1875rem; }
  .note-menu { position: relative; width: auto; }
  .note-menu__sheet { position: absolute; top: 100%; right: 0; z-index: 10; width: min(31rem, calc(100vw - 5rem)); }
  .u-wrap { width: min(100% - 5rem, 74rem); }
  .frontispiece { padding-block: 3.5rem 2rem; }
  .ribbon-jump { grid-template-columns: 1fr; }
  .ribbon-jump select { flex: 1; width: auto; min-width: 0; }
  .ribbon-jump__controls { flex-wrap: nowrap; }
  .lexicon { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.25rem; }
  .notebook-section { padding-block: 3.5rem; }
  .definition-slip { padding: 3.5rem 2.5rem 2rem; }
  .route-windows { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
  .route-window { padding: 4rem 2rem 2rem; }
  .quote-sheet > div { grid-template-columns: 12rem 1fr; gap: 2rem; padding-block: 1.3rem; }
}

@media (min-width: 64rem) {
  .frontispiece--primer { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); gap: 4rem; padding-block: 3.6rem 3.2rem; align-items: center; }
  .frontispiece--primer h1 { font-size: clamp(3rem, 5vw, 4.75rem); max-width: 15ch; }
  .frontispiece__drawing { margin: 0; }
  .frontispiece__intro { font-size: 1.25rem; }
  .door-diagram { padding: 4.5rem 2rem 2rem; }
  .claim-pair { grid-template-columns: minmax(10rem, 1fr) minmax(0, 3fr); gap: 2rem; }
  .claim-pair dt { max-width: 20ch; padding-top: .15rem; }
  .colophon__line { grid-template-columns: 1.25fr 1fr; gap: 3rem; align-items: center; }
  .colophon nav { justify-content: flex-end; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

@media print {
  body { background: white; color: black; font-size: 12pt; }
  .mast, .section-map, .return-strip, .colophon nav, .paper-skip { display: none; }
  .u-wrap { width: 100%; }
  .frontispiece { padding-top: 0; }
  h1 { font-size: 30pt; }
  h2 { font-size: 22pt; }
  .source-link a { min-height: 0; }
  .claim-pair, .route-window, .qa-record { break-inside: avoid; }
}