@font-face { font-family: 'Genos'; font-style: italic; font-weight: 100; font-display: swap; src: url("/assets/fonts/genos-latin-100-italic.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: normal; font-weight: 100; font-display: swap; src: url("/assets/fonts/genos-latin-100-normal.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: italic; font-weight: 200; font-display: swap; src: url("/assets/fonts/genos-latin-200-italic.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: normal; font-weight: 200; font-display: swap; src: url("/assets/fonts/genos-latin-200-normal.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: italic; font-weight: 300; font-display: swap; src: url("/assets/fonts/genos-latin-300-italic.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: normal; font-weight: 300; font-display: swap; src: url("/assets/fonts/genos-latin-300-normal.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: italic; font-weight: 400; font-display: swap; src: url("/assets/fonts/genos-latin-400-italic.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: normal; font-weight: 400; font-display: swap; src: url("/assets/fonts/genos-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: italic; font-weight: 500; font-display: swap; src: url("/assets/fonts/genos-latin-500-italic.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: normal; font-weight: 500; font-display: swap; src: url("/assets/fonts/genos-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: italic; font-weight: 600; font-display: swap; src: url("/assets/fonts/genos-latin-600-italic.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: normal; font-weight: 600; font-display: swap; src: url("/assets/fonts/genos-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: italic; font-weight: 700; font-display: swap; src: url("/assets/fonts/genos-latin-700-italic.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: normal; font-weight: 700; font-display: swap; src: url("/assets/fonts/genos-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: italic; font-weight: 800; font-display: swap; src: url("/assets/fonts/genos-latin-800-italic.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: normal; font-weight: 800; font-display: swap; src: url("/assets/fonts/genos-latin-800-normal.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: italic; font-weight: 900; font-display: swap; src: url("/assets/fonts/genos-latin-900-italic.woff2") format("woff2"); }
@font-face { font-family: 'Genos'; font-style: normal; font-weight: 900; font-display: swap; src: url("/assets/fonts/genos-latin-900-normal.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: italic; font-weight: 200; font-display: swap; src: url("/assets/fonts/spectral-latin-200-italic.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: normal; font-weight: 200; font-display: swap; src: url("/assets/fonts/spectral-latin-200-normal.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: italic; font-weight: 300; font-display: swap; src: url("/assets/fonts/spectral-latin-300-italic.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: normal; font-weight: 300; font-display: swap; src: url("/assets/fonts/spectral-latin-300-normal.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: italic; font-weight: 400; font-display: swap; src: url("/assets/fonts/spectral-latin-400-italic.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: normal; font-weight: 400; font-display: swap; src: url("/assets/fonts/spectral-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: italic; font-weight: 500; font-display: swap; src: url("/assets/fonts/spectral-latin-500-italic.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: normal; font-weight: 500; font-display: swap; src: url("/assets/fonts/spectral-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: italic; font-weight: 600; font-display: swap; src: url("/assets/fonts/spectral-latin-600-italic.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: normal; font-weight: 600; font-display: swap; src: url("/assets/fonts/spectral-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: italic; font-weight: 700; font-display: swap; src: url("/assets/fonts/spectral-latin-700-italic.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: normal; font-weight: 700; font-display: swap; src: url("/assets/fonts/spectral-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: italic; font-weight: 800; font-display: swap; src: url("/assets/fonts/spectral-latin-800-italic.woff2") format("woff2"); }
@font-face { font-family: 'Spectral'; font-style: normal; font-weight: 800; font-display: swap; src: url("/assets/fonts/spectral-latin-800-normal.woff2") format("woff2"); }
:root {
  --bg-light-base: #ede4d3;
  --fg-light-base-body: #221d33;
  --fg-light-base-heading: #221d33;
  --fg-light-base-muted: #4f4860;
  --fg-light-base-link: #43319a;
  --fg-light-base-inverse: #2e2747;
  --bg-light-card: #f4eddf;
  --fg-light-card-body: #221d33;
  --fg-light-card-heading: #221d33;
  --fg-light-card-muted: #4f4860;
  --fg-light-card-link: #43319a;
  --fg-light-card-inverse: #2e2747;
  --bg-light-elevated: #faf6ee;
  --fg-light-elevated-body: #221d33;
  --fg-light-elevated-heading: #221d33;
  --fg-light-elevated-muted: #4f4860;
  --fg-light-elevated-link: #43319a;
  --fg-light-elevated-inverse: #2e2747;
  --brand-light-accent: #43319a;
  --brand-light-accent-hover: #2f2275;
  --brand-light-on-accent: #f7f3ea;
  --focus-light-ring: #43319a;
  --border-light-default: #776c60;
  --border-light-subtle: #b3a794;
}
.bg-surface-base { background: var(--bg-light-base); --fg-body: var(--fg-light-base-body); --fg-heading: var(--fg-light-base-heading); --fg-muted: var(--fg-light-base-muted); --fg-link: var(--fg-light-base-link); --fg-inverse: var(--fg-light-base-inverse); }
.bg-surface-card { background: var(--bg-light-card); --fg-body: var(--fg-light-card-body); --fg-heading: var(--fg-light-card-heading); --fg-muted: var(--fg-light-card-muted); --fg-link: var(--fg-light-card-link); --fg-inverse: var(--fg-light-card-inverse); }
.bg-surface-elevated { background: var(--bg-light-elevated); --fg-body: var(--fg-light-elevated-body); --fg-heading: var(--fg-light-elevated-heading); --fg-muted: var(--fg-light-elevated-muted); --fg-link: var(--fg-light-elevated-link); --fg-inverse: var(--fg-light-elevated-inverse); }
.text-role-body { color: var(--fg-body); overflow-wrap: anywhere; }
.text-role-heading { color: var(--fg-heading); overflow-wrap: anywhere; }
.text-role-muted { color: var(--fg-muted); }
.text-role-link { color: var(--fg-link); }
.text-role-inverse { color: var(--fg-inverse); }
.text-role-link { text-decoration: underline; }
.text-role-link:hover { color: var(--brand-light-accent-hover); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--focus-light-ring); outline-offset: 2px; }
img { max-width: 100%; height: auto; }
.site-logo { max-width: 100%; height: auto; }
.site-menu > summary { list-style: none; cursor: pointer; }
.site-menu > summary::-webkit-details-marker { display: none; }
:where(section[data-section][style]) { background-size: cover; background-position: center; padding: clamp(1.5rem, 4vw, 3rem); }
:where(section[data-section][style] > .bg-surface-card) { padding: clamp(1rem, 3vw, 2rem); }
:where(section[data-section][style] > .bg-surface-card > :first-child) { margin-top: 0; }
:where(section[data-section][style] > .bg-surface-card > :last-child) { margin-bottom: 0; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { position: static; padding: 0.25rem 0.5rem; outline: 2px solid var(--focus-light-ring); }

/* Anatomy-atlas editorial: warm paper leaves, fine plate lines, blue-violet ink. */
:root {
  --ink-accent: var(--brand-light-accent);
  --ink-hover: var(--brand-light-accent-hover);
  --rule: var(--border-light-default);
  --rule-soft: var(--border-light-subtle);
  --serif: 'Spectral', Georgia, serif;
  --label: 'Genos', 'Arial Narrow', sans-serif;
  --measure: 36rem;
  --step: clamp(0rem, 4vw, 3.25rem);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.7;
  font-weight: 400;
  font-kerning: normal;
  font-variant-numeric: oldstyle-nums;
}

h1, h2, h3, h4 {
  font-family: var(--label);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin: 0;
}

a { text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

/* ---------- Atlas frame: side rail + leaf ---------- */

.atlas { min-height: 100vh; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--rule);
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-family: var(--label);
  font-weight: 500;
  font-size: 1.35rem;
  line-height: 1.05;
}
.brand .site-logo { width: 2.25rem; height: 2.25rem; flex: none; }
.brand:hover .wordmark { text-decoration: underline; text-decoration-thickness: 1px; }

.rail { display: none; }
.rail .site-nav ul { list-style: none; margin: 0; padding: 0; }
.rail .site-nav li { border-top: 1px solid var(--rule-soft); }
.rail .site-nav li:last-child { border-bottom: 1px solid var(--rule-soft); }
.rail .site-nav a {
  display: block;
  padding: 0.7rem 0 0.7rem 0.9rem;
  font-family: var(--label);
  font-size: 1.15rem;
  font-weight: 400;
  text-decoration: none;
  border-left: 2px solid transparent;
}
.rail .site-nav a:hover { border-left-color: var(--ink-accent); text-decoration: underline; }

.toggle { flex: none; }
.site-menu { position: static; }
.site-menu > summary {
  display: inline-flex;
  flex: none;
  white-space: nowrap;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.75rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
  font-family: var(--label);
  font-size: 1.1rem;
}
.menu-icon {
  display: inline-block;
  width: 1.1rem;
  height: 0.75rem;
  border-top: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  background: linear-gradient(currentColor, currentColor) center / 100% 1px no-repeat;
}
.menu-label { white-space: nowrap; overflow-wrap: normal; word-break: keep-all; }
.site-menu[open] > summary { border-color: var(--ink-accent); }
.site-menu > ul {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  z-index: 5;
  margin: 0;
  padding: 0.5rem 1.25rem 1rem;
  list-style: none;
  background: var(--bg-light-card);
  border-bottom: 1px solid var(--rule);
}
.site-menu > ul li { border-top: 1px solid var(--rule-soft); }
.site-menu > ul a { display: block; padding: 0.75rem 0; font-family: var(--label); font-size: 1.2rem; text-decoration: none; }
.site-menu ul ul { list-style: none; padding-left: 1rem; margin: 0; }

.leaf { padding: 0 1.25rem; }

.breadcrumbs { padding-top: 1.25rem; font-family: var(--label); font-size: 1rem; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.3rem 0.6rem; margin: 0; padding: 0; }
.breadcrumbs li + li::before { content: "/"; margin-right: 0.6rem; color: var(--rule); }

.site-footer {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 5rem;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--label);
  font-size: 1rem;
}
.site-footer p { margin: 0; }
.colophon-mark { width: 0.6rem; height: 0.6rem; border: 1px solid var(--ink-accent); transform: rotate(45deg); }

@media (min-width: 60rem) {
  .atlas { display: grid; grid-template-columns: 15.5rem minmax(0, 1fr); }
  .site-header {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 2.5rem;
    padding: 2rem 1.5rem;
    border-bottom: 0;
    border-right: 1px solid var(--rule);
    min-height: 100vh;
  }
  .brand { flex-direction: column; align-items: flex-start; font-size: 1.6rem; }
  .brand .site-logo { width: 3rem; height: 3rem; }
  .rail { display: block; }
  .toggle { display: none; }
  .leaf { padding: 0 clamp(2rem, 5vw, 5rem); }
}

/* ---------- Shared reading column ---------- */

.page { padding-top: 2rem; }

.page-title h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  max-width: 20ch;
  text-wrap: balance;
}

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: 1.1em; }
.prose p { margin: 0; hyphens: auto; }
.prose h2 {
  margin-top: 2.6rem;
  font-size: 1.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
}
.prose h3 { margin-top: 2rem; font-size: 1.45rem; font-weight: 500; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li + li { margin-top: 0.4rem; }
.prose table { border-collapse: collapse; width: 100%; font-size: 1rem; }
.prose th, .prose td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--rule-soft); }
.table-scroll { overflow-x: auto; }

.accent-block {
  margin: 1.6rem 0;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 2px solid var(--ink-accent);
  font-size: 1rem;
  font-style: italic;
}

figure { margin: 0; }
.photo-hero, .photo-inline {
  margin: 2rem 0;
  padding: 0.6rem;
  border: 1px solid var(--rule);
  background: var(--bg-light-elevated);
}
.photo-hero img, .photo-inline img { display: block; width: 100%; }

section[data-section][style] { margin: 2.5rem 0; padding: clamp(2rem, 6vw, 4.5rem) clamp(1rem, 4vw, 3rem); }
section[data-section][style] > .bg-surface-card { max-width: var(--measure); border: 1px solid var(--rule); }

/* ---------- Home: stepped descent of plates ---------- */

.cover {
  display: grid;
  gap: 2rem;
  padding: 1rem 0 3rem;
  border-bottom: 1px solid var(--rule);
}
.cover-title h1 {
  font-size: clamp(2.8rem, 9vw, 5.6rem);
  font-weight: 200;
  line-height: 0.95;
  letter-spacing: -0.005em;
  max-width: 12ch;
}
.cover-lines { margin-top: 1.75rem; max-width: 30rem; }
.cover-lines .display-line { margin: 0; padding: 0.55rem 0 0.55rem 1rem; border-left: 1px solid var(--ink-accent); font-size: 1.05rem; line-height: 1.55; }
.cover-lines .display-line + .display-line { margin-top: 0.35rem; }
.cover-plate { color: var(--ink-accent); max-width: 16rem; justify-self: start; }
.cover-plate svg { display: block; width: 100%; height: auto; }
.cover-plate .plane-b { stroke: var(--rule); }

@media (min-width: 48rem) {
  .cover { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); align-items: end; }
  .cover-plate { justify-self: end; }
}

.descent { counter-reset: plate; padding-top: 1.5rem; max-width: 46rem; }
.descent > * { margin: 0; max-width: var(--measure); }
.descent > p { margin-top: 1.1em; hyphens: auto; }
.descent > h2 {
  counter-increment: plate;
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  align-items: baseline;
  margin-top: 3.25rem;
  padding-top: 1rem;
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
  border-top: 1px solid var(--rule);
}
.descent > h2::before {
  content: counter(plate, upper-roman);
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink-accent);
}
.descent > h2:nth-of-type(1), .descent > h2:nth-of-type(1) ~ * { margin-left: calc(var(--step) * 1); }
.descent > h2:nth-of-type(2), .descent > h2:nth-of-type(2) ~ * { margin-left: calc(var(--step) * 2); }
.descent > h2:nth-of-type(3), .descent > h2:nth-of-type(3) ~ * { margin-left: calc(var(--step) * 3); }
.descent > h2:nth-of-type(4), .descent > h2:nth-of-type(4) ~ * { margin-left: calc(var(--step) * 4); }
.descent > .photo-hero { max-width: 40rem; margin: 0 0 2.5rem; }

/* ---------- Topic hub: chapters offset like bound pages ---------- */

.hub-head { padding-bottom: 1.5rem; border-bottom: 1px solid var(--rule); margin-bottom: 1.5rem; }
.chapters { margin-top: 3.5rem; max-width: 44rem; }
.chapters ul { list-style: none; margin: 0; padding: 0; counter-reset: chapter; }
.chapters li {
  counter-increment: chapter;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  align-items: baseline;
  padding: 1rem 0;
  border-top: 1px solid var(--rule);
}
.chapters li:last-child { border-bottom: 1px solid var(--rule); }
.chapters li::before { content: counter(chapter, lower-roman); font-family: var(--label); color: var(--ink-accent); }
.chapters li:nth-child(2) { margin-left: calc(var(--step) * 0.75); }
.chapters li:nth-child(3) { margin-left: calc(var(--step) * 1.5); }
.chapters li:nth-child(4) { margin-left: calc(var(--step) * 2.25); }
.chapters li:nth-child(n+5) { margin-left: calc(var(--step) * 3); }
.chapters a { font-family: var(--label); font-size: 1.45rem; line-height: 1.2; text-decoration: none; }
.chapters a:hover { text-decoration: underline; }

/* ---------- Article: one column, margin notes ---------- */

.article-head { max-width: var(--measure); padding-bottom: 1.25rem; margin-bottom: 1.75rem; border-bottom: 1px solid var(--rule); }
@media (min-width: 80rem) {
  .article-body .accent-block { float: right; clear: right; width: 14rem; margin: 0.3rem -17rem 1rem 0; }
}

/* ---------- About: atlas preface ---------- */

.preface { max-width: var(--measure); }
.preface-plate { float: right; width: 6.5rem; margin: 0 0 1rem 1.5rem; color: var(--ink-accent); }
.preface-plate svg { display: block; width: 100%; height: auto; }
.preface .page-title { margin-bottom: 2rem; }
.signature {
  margin: 3rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px solid var(--rule);
  width: 12rem;
  font-style: italic;
}

/* ---------- Contact: split panel ---------- */

.split { display: grid; gap: 2.5rem; }
.split-text .page-title { margin-bottom: 1.75rem; }
.split-plate { color: var(--ink-accent); max-width: 14rem; }
.split-plate svg { display: block; width: 100%; height: auto; }
@media (min-width: 64rem) {
  .split { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: start; }
  .split-plate { max-width: 20rem; justify-self: center; margin-top: 6rem; }
}

.note-form {
  display: grid;
  gap: 1.1rem;
  margin-top: 2.25rem;
  max-width: var(--measure);
  padding: clamp(1rem, 3vw, 1.75rem);
  border: 1px solid var(--rule);
}
@media (min-width: 40rem) {
  .note-form { grid-template-columns: 1fr 1fr; }
  .field-wide { grid-column: 1 / -1; }
}
.field { display: grid; gap: 0.35rem; }
.field label { font-family: var(--label); font-size: 1.05rem; }
.field input, .field textarea {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  color: inherit;
  padding: 0.6rem 0.7rem;
  min-height: 2.75rem;
  background: var(--bg-light-elevated);
  border: 1px solid var(--rule);
  border-radius: 2px;
}
.field textarea { resize: vertical; }
.field input:focus-visible, .field textarea:focus-visible { outline: 2px solid var(--ink-accent); outline-offset: 1px; }
.send {
  font-family: var(--label);
  font-size: 1.15rem;
  min-height: 2.75rem;
  padding: 0.5rem 1.4rem;
  background: transparent;
  border: 1px solid var(--ink-accent);
  border-radius: 2px;
  cursor: pointer;
}
.send:hover { color: var(--ink-hover); border-color: var(--ink-hover); border-width: 2px; }

/* ---------- Thank you: colophon ---------- */

.colophon { max-width: 28rem; margin: 3rem auto 0; text-align: left; }
.colophon .page-title h1 { font-size: clamp(2rem, 5vw, 2.8rem); }
.colophon .prose { margin-top: 1.5rem; font-size: 1.05rem; }
.back { margin-top: 2.5rem; padding-top: 0.75rem; border-top: 1px solid var(--rule); font-family: var(--label); font-size: 1.2rem; }

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