*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 24px; }
body { margin: 0; }
img, svg { max-width: 100%; height: auto; }
img { aspect-ratio: 1; object-fit: cover; border-radius: 50%; }
a, p, li, h1, h2, h3 { overflow-wrap: anywhere; }
.c-shell { width: min(100%, 1280px); margin-inline: auto; padding-inline: 32px; }
.c-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 24px; }
.c-brand { display: inline-flex; align-items: center; gap: 14px; min-height: 48px; padding-block: 8px; }
.c-mark { display: grid; place-items: center; flex: 0 0 42px; width: 42px; height: 42px; }
.c-mark::after { content: ''; width: 14px; height: 14px; background: currentColor; }
.c-link, .c-directory a, .c-jump a, .c-breadcrumb a, .c-source-link { display: inline-flex; align-items: center; min-height: 48px; padding: 10px 18px; }
.c-skip { position: absolute; left: 24px; top: 8px; transform: translateY(-180%); z-index: 5; padding: 12px 16px; }
.c-skip:focus { transform: none; }
.c-breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding-block: 12px; }
.c-breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; list-style: none; margin: 0; padding: 0; }
.c-breadcrumb li { display: flex; align-items: center; gap: 8px; }
.c-breadcrumb li + li::before { content: '/'; }
.c-hero { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(280px, .9fr); gap: 48px; align-items: center; padding-block: 52px 64px; }
.c-hero:not(:has(.c-flow)) { grid-template-columns: minmax(0, 1fr); padding-block: 32px 56px; }
.c-hero-copy { min-width: 0; }
.c-hero-copy h1 { margin: 16px 0 28px; }
.c-hero-copy p { max-width: 58ch; }
.c-hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.c-flow { margin: 0; padding: 0; }
.c-flow figcaption { margin: 0; padding: 28px; }
.c-flow ol { list-style: none; margin: 0; padding: 0; }
.c-flow li { display: grid; grid-template-columns: 48px minmax(0, 1fr); align-items: center; gap: 18px; padding: 24px 28px; }
.c-node { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; }
.c-flow li:nth-child(1) .c-node::before { content: '1'; }
.c-flow li:nth-child(2) .c-node::before { content: '2'; }
.c-flow li:nth-child(3) .c-node::before { content: '3'; }
.c-flow strong { display: block; margin-bottom: 4px; }
.c-article { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 40px; align-items: start; padding-bottom: 64px; }
.c-chapters { min-width: 0; }
.c-section { margin-bottom: 24px; padding: 40px; scroll-margin-top: 24px; }
.c-section h2 { margin: 0 0 28px; max-width: 32ch; }
.c-section p, .c-section li { max-width: 70ch; }
.c-checklist { list-style: none; padding: 0; margin: 0 0 28px; }
.c-checklist li { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 16px; margin-block: 18px; }
.c-checklist li::before { content: ''; width: 17px; height: 17px; border: 2px solid currentColor; margin-top: 7px; }
.c-note { margin: 0; padding-top: 8px; }
.c-note + .c-note { margin-top: 18px; }
.c-note-label { display: block; margin-bottom: 8px; }
.c-jump { min-width: 0; position: sticky; top: 24px; }
.c-jump details { padding: 12px 18px; }
.c-jump summary { min-height: 48px; padding: 12px 4px; cursor: pointer; }
.c-jump ul { list-style: none; margin: 8px 0; padding: 0; }
.c-jump a { width: 100%; padding-inline: 4px; }
.c-jump > p { margin-top: 24px; }
.c-chapter-notes { padding: 40px; margin-block: 32px; }
.c-chapter-notes h2 { margin-top: 0; }
.c-chapter-notes ul { list-style: none; padding: 0; margin: 24px 0 0; }
.c-chapter-notes li { margin-bottom: 16px; }
.c-source-link { width: 100%; padding-left: 0; gap: 8px; }
.c-source-note { margin: 0; }
.c-next { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-block: 24px; }
.c-study { margin: 28px 0; padding: 24px; }
.c-study-row { margin-block: 20px; }
.c-study-track { height: 20px; margin-top: 10px; overflow: hidden; }
.c-study-bar { display: block; height: 100%; }
.c-study-bar--medicine { width: 74.5%; }
.c-study-bar--comparison { width: 12%; }
.c-directory { padding-block: 56px; }
.c-directory-head { display: flex; align-items: start; justify-content: space-between; gap: 24px; margin-bottom: 40px; }
.c-directory-head h2 { margin-top: 0; }
.c-directory-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.c-directory ul { list-style: none; margin: 0; padding: 0; }
.c-directory h3 { margin: 0 0 16px; padding-top: 16px; }
.c-directory a { display: flex; width: 100%; padding-inline: 0; }
.c-footer-note { margin: 40px 0 0; max-width: 72ch; padding-top: 24px; }
.c-note-line { display: block; min-height: 48px; margin-top: 16px; }
@media (max-width: 960px) {
  .c-hero { gap: 28px; grid-template-columns: minmax(0, 1.3fr) minmax(240px, 1fr); }
  .c-flow figcaption, .c-flow li { padding: 24px; }
  .c-article { grid-template-columns: minmax(0, 1fr) 230px; gap: 24px; }
  .c-section, .c-chapter-notes { padding: 28px; }
  .c-directory-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
  .c-shell { padding-inline: 20px; }
  .c-header { gap: 12px; padding-block: 16px; }
  .c-brand { gap: 10px; }
  .c-mark { flex-basis: 34px; width: 34px; height: 34px; }
  .c-header > .c-link { max-width: 126px; padding-inline: 10px; flex-shrink: 0; }
  .c-hero, .c-hero:not(:has(.c-flow)) { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-block: 32px 40px; }
  .c-hero-actions { gap: 12px; }
  .c-hero-actions .c-link { width: 100%; justify-content: center; text-align: center; }
  .c-flow figcaption { padding: 24px; }
  .c-flow li { padding: 20px 24px; }
  .c-article { display: flex; flex-direction: column; gap: 24px; padding-bottom: 40px; }
  .c-jump { order: -1; width: 100%; position: static; }
  .c-jump > p { display: none; }
  .c-chapters { width: 100%; }
  .c-section, .c-chapter-notes { padding: 28px 24px; }
  .c-directory { padding-block: 40px; }
  .c-directory-head { display: block; }
  .c-directory-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .c-study { padding: 16px; }
}
@media print {
  .c-header, .c-jump, .c-directory-grid, .c-directory-head, .c-skip, .c-breadcrumb, .c-next, .c-hero-actions { display: none; }
  .c-shell { width: auto; padding: 0; }
  .c-hero, .c-article { display: block; padding: 0; }
  .c-flow { display: none; }
  .c-section, .c-chapter-notes { padding: 16px 0; border: 0; box-shadow: none; }
  .c-checklist li { break-inside: avoid; }
  .c-directory { padding: 0; }
  .c-footer-note { margin: 0; }
}