:root {
  color-scheme: light;
  --paper: #f4f2ec;
  --ink: #20211e;
  --charcoal: #151614;
  --muted: #585950;
  --line: #b7b7ad;
  --line-dark: #66695e;
  --white: #fffefa;
  --photo-matte: #deded5;
  --shadow-ink: #15161426;
  --focus: #654a24;
  --serif: Georgia, "Times New Roman", Times, serif;
  --body-size: 1.125rem;
  --label-size: 1rem;
  --term-size: 1.3rem;
  --lead-size: 1.4rem;
  --section-size: clamp(1.8rem, 2.7vw, 2.5rem);
  --title-size: clamp(3rem, 5.5vw, 5rem);
  --body-line: 1.62;
  --heading-line: 1.05;
  --measure: 66ch;
  --site-width: 86rem;
  --heading-width: 48rem;
  --rail-width: 10.75rem;
  --document-gap: 3.5rem;
  --space-xs: .5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-xxl: 5rem;
  --site-inset: clamp(1.25rem, 3.8vw, 3.5rem);
  --tap: 2.75rem;
  --stroke: 1px;
  --small-radius: 2px;
  --ratio-portrait: 4 / 5;
  --ratio-landscape: 3 / 2;
  --ratio-wide: 9 / 5;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: var(--space-lg); }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--serif); font-size: var(--body-size); line-height: var(--body-line); }
main, aside, section, article, figure, div { min-width: 0; }
h1, h2, h3, p, ul, dl, dd, figure { margin: 0; }
h1, h2, h3 { font-weight: 400; }
a { color: inherit; text-underline-offset: .2em; text-decoration-thickness: var(--stroke); }
button, input, summary { font: inherit; }
button, summary { cursor: pointer; }
input, button { border-radius: var(--small-radius); }
button { color: inherit; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }
::selection { color: var(--white); background: var(--muted); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 5px; }
.surface-dark :focus-visible { outline-color: var(--white); }
main:focus { outline: none; }
section { scroll-margin-block-start: var(--space-lg); }

.width-site { max-width: var(--site-width); margin-inline: auto; }
.width-document { width: 100%; }
.width-copy { max-width: var(--measure); }
.width-heading { max-width: var(--heading-width); }
.surface-dark { background: var(--charcoal); color: var(--paper); }
.type-italic { font-style: italic; }
.type-kicker { color: var(--muted); font-size: var(--label-size); }
.type-title { font-size: var(--title-size); line-height: var(--heading-line); letter-spacing: -.045em; text-wrap: balance; }
.type-section { font-size: var(--section-size); line-height: 1.18; letter-spacing: -.025em; text-wrap: balance; }
article .type-section { font-size: var(--term-size); line-height: 1.35; letter-spacing: -.01em; }
.type-lead { font-size: var(--lead-size); line-height: 1.48; }
.type-term { font-size: var(--term-size); line-height: 1.35; }
.flow-small > * + * { margin-block-start: var(--space-sm); }
.flow-medium > * + * { margin-block-start: var(--space-md); }
.space-section { margin-block-start: var(--space-xxl); }
.space-opening { padding-block-start: var(--space-md); }
.space-list-item + .space-list-item { margin-block-start: var(--space-xs); }
.space-tile-copy { margin-block: var(--space-xs) var(--space-md); color: var(--muted); }
.space-filter { margin-block: var(--space-lg); }
.space-definitions { margin-block-start: var(--space-lg); }
.rule-top { border-block-start: var(--stroke) solid var(--line); }
.rule-left { border-inline-start: 2px solid var(--ink); }
.inset-note { padding-inline-start: var(--space-md); }
.inset-header { padding-inline: var(--site-inset); padding-block: var(--space-sm); }
.inset-document { padding-inline: var(--site-inset); padding-block: var(--space-xl) var(--space-xxl); }
.inset-row { padding-block: var(--space-lg); }
.inset-drawer { padding-block: var(--space-xs) var(--space-lg); }
.inset-footer { padding: var(--space-xl) var(--site-inset); }

.grid-header { display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm); }
.grid-document { display: grid; grid-template-columns: var(--rail-width) minmax(0, 1fr); gap: var(--document-gap); align-items: start; }
.grid-hero { display: grid; grid-template-columns: minmax(0, 1.17fr) minmax(0, 1fr); gap: var(--space-xl); align-items: start; }
.grid-option { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2.25fr); gap: var(--space-lg); }
.grid-definition { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2.25fr); gap: var(--space-lg); }
.grid-chapters { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: var(--space-xl); }
.grid-footer { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-xl); }
.grid-filter { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-sm); }
.rail-sticky { position: sticky; top: var(--space-lg); padding-block-start: var(--space-lg); }
.rail-links { display: flex; flex-direction: column; }
.list-unmarked { list-style: none; padding: 0; }
.list-reading { padding-inline-start: var(--space-md); }
.list-reading li { padding-inline-start: var(--space-xs); }
.list-reading li::marker { color: var(--muted); }

.link-brand { min-height: var(--tap); display: inline-flex; gap: var(--space-xs); align-items: center; font-size: var(--term-size); text-decoration: none; white-space: nowrap; }
.link-rail { display: flex; align-items: center; min-height: var(--tap); padding-block: var(--space-xs); font-size: var(--label-size); text-decoration: none; }
.link-rail:hover { text-decoration: underline; }
.link-step { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); min-height: var(--tap); width: fit-content; max-width: 100%; border-block-end: var(--stroke) solid var(--ink); padding-block: var(--space-xs); text-decoration: none; }
.link-chapter { display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm); min-height: var(--tap); padding-block: var(--space-sm) var(--space-xs); font-size: var(--term-size); text-decoration: none; }
.link-menu { display: flex; align-items: center; justify-content: space-between; min-height: var(--tap); gap: var(--space-sm); padding: var(--space-xs) var(--space-sm); text-decoration: none; }
.link-menu:hover, .current-page { background: var(--paper); color: var(--ink); }
.link-footer { display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm); min-height: var(--tap); padding-block: var(--space-xs); border-block-end: var(--stroke) solid var(--line-dark); text-decoration: none; }
.link-source { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); min-height: var(--tap); padding-block: var(--space-xs); }
.arrow-end { flex-shrink: 0; }
.link-step:hover, .link-chapter:hover, .link-footer:hover { text-decoration: underline; }
.footer-links { max-width: 28rem; width: 100%; justify-self: end; }

.menu-position { position: relative; z-index: 5; }
.tap-menu { display: flex; align-items: center; gap: var(--space-sm); min-height: var(--tap); font-size: var(--label-size); list-style: none; }
.tap-menu::-webkit-details-marker, .tap-summary::-webkit-details-marker { display: none; }
.menu-panel { position: absolute; inset-block-start: calc(100% + var(--space-sm)); inset-inline-end: 0; width: min(22rem, calc(100vw - 2 * var(--site-inset))); padding: var(--space-xs); color: var(--paper); background: var(--charcoal); border: var(--stroke) solid var(--line-dark); box-shadow: 0 .75rem 1.5rem var(--shadow-ink); }
.tap-summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: var(--space-sm); min-height: var(--tap); padding-block: var(--space-sm); }
.drawer-symbol { display: inline-flex; justify-content: center; align-items: center; width: 1.25rem; flex-shrink: 0; }
details[open] > summary .drawer-symbol { transform: rotate(45deg); }
.source-drawer { margin-block-start: var(--space-lg); border-block-end: var(--stroke) solid var(--line); }
.photo-frame { background: var(--photo-matte); overflow: hidden; }
.photo-fill { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1); font-size: var(--label-size); color: var(--muted); }
.ratio-portrait { aspect-ratio: var(--ratio-portrait); }
.ratio-landscape { aspect-ratio: var(--ratio-landscape); }
.ratio-wide { aspect-ratio: var(--ratio-wide); }
.input-search { width: 100%; min-width: 0; min-height: 3.25rem; border: var(--stroke) solid var(--muted); background: var(--white); color: var(--ink); padding: .7rem var(--space-sm); }
.input-search::placeholder { color: var(--muted); opacity: 1; }
.button-clear { min-width: var(--tap); min-height: var(--tap); border: var(--stroke) solid var(--ink); background: var(--charcoal); color: var(--paper); padding: var(--space-xs) var(--space-md); }
.button-clear:hover { background: var(--muted); }
.skip-link { position: fixed; top: var(--space-sm); left: var(--space-sm); z-index: 10; min-height: var(--tap); padding: var(--space-sm); background: var(--white); color: var(--ink); transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }

@media (max-width: 1100px) {
  :root { --rail-width: 9rem; --document-gap: 2rem; --title-size: 3.8rem; }
  .grid-hero { gap: var(--space-lg); }
}
@media (max-width: 850px) {
  :root { --document-gap: 2rem; --title-size: 3.35rem; --space-xxl: 3.5rem; }
  .grid-document { grid-template-columns: minmax(0, 1fr); }
  .rail-sticky { position: static; padding-block-start: 0; }
  .rail-links { flex-direction: row; flex-wrap: wrap; column-gap: var(--space-md); }
  .rail-sticky .flow-small > * + * { margin-block-start: var(--space-xs); }
  .rail-sticky { border-block-end: var(--stroke) solid var(--line); padding-block-end: var(--space-sm); }
}
@media (max-width: 600px) {
  :root { --body-size: 1.0625rem; --lead-size: 1.25rem; --title-size: 3rem; --space-xl: 2rem; --space-xxl: 3rem; }
  .grid-hero, .grid-footer, .grid-chapters, .grid-option, .grid-definition { grid-template-columns: minmax(0, 1fr); }
  .grid-option, .grid-definition { gap: var(--space-sm); }
  .grid-header { align-items: start; }
  .link-brand { display: flex; flex-direction: column; align-items: start; gap: 0; font-size: var(--term-size); line-height: 1.25; }
  .link-brand .type-italic { font-size: var(--label-size); }
  .hero-photo .photo-frame { aspect-ratio: var(--ratio-landscape); }
  .hero-photo .photo-fill { object-position: center 58%; }
  .footer-links { max-width: none; }
  .type-title { letter-spacing: -.035em; }
  .link-rail { min-height: var(--tap); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}
@media print {
  :root { --paper: #fff; --ink: #000; --body-size: 12pt; }
  header, .rail-sticky, footer, .skip-link, [data-glossary-tools] { display: none; }
  .grid-document { display: block; padding: 0; }
  .grid-hero { grid-template-columns: minmax(0, 1fr); }
  .hero-photo { display: none; }
  .glossary-entry[hidden] { display: grid !important; }
  .type-title { font-size: 30pt; }
  .space-section { margin-block-start: 2rem; }
  a { color: #000; }
}