:root { --page: 82rem; --gutter: clamp(1.25rem, 5.4vw, 5rem); }
* { box-sizing: border-box; }
html { scroll-padding-top: 1.5rem; }
body { margin: 0; }
a, button, input, textarea, select, summary { -webkit-tap-highlight-color: transparent; }
a { min-height: 44px; }
button, summary { min-height: 48px; }
input, select { min-height: 52px; }
input, textarea, select, button { max-width: 100%; }
button { cursor: pointer; }
main, .masthead, .site-footer { max-width: var(--page); margin-inline: auto; padding-inline: var(--gutter); }
.masthead { display: grid; grid-template-columns: 1fr auto; align-items: start; gap: 2rem; padding-block: 2rem; position: relative; z-index: 2; }
.masthead-name { display: flex; gap: 1rem; align-items: center; width: fit-content; min-height: 54px; }
.brand-sub { display: block; margin-top: .25rem; }
.archive-mark { display: block; width: 28px; height: 37px; flex-shrink: 0; position: relative; }
.archive-mark::before, .archive-mark::after { content: ''; position: absolute; }
.archive-mark::before { width: 18px; height: 18px; top: 0; left: 0; }
.archive-mark::after { width: 12px; height: 32px; bottom: 0; right: 0; }
.path-menu { width: 18rem; position: relative; }
.path-menu summary { display: flex; justify-content: space-between; align-items: center; padding: .75rem 0 .75rem 1rem; gap: 1rem; cursor: pointer; }
.path-menu summary::-webkit-details-marker { display: none; }
.path-menu summary::marker { content: ''; }
.menu-symbol { width: 44px; display: grid; place-items: center; }
.menu-panel { position: absolute; right: 0; top: calc(100% + 1rem); width: min(66rem, calc(100vw - var(--gutter) * 2)); display: grid; grid-template-columns: 1fr 1.5fr 1fr; gap: 2rem; padding: 2rem; }
.menu-group { display: flex; flex-direction: column; min-width: 0; }
.menu-group .u-label { margin: 0 0 .75rem; }
.menu-panel a { display: flex; align-items: center; padding: .65rem .75rem; }
.skip-link { position: fixed; top: 1rem; left: 1rem; z-index: 10; transform: translateY(-200%); padding: .75rem 1rem; display: flex; align-items: center; }
.skip-link:focus { transform: translateY(0); }
.home-hero { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 4rem; align-items: center; padding-block: 3rem 5rem; }
.hero-text { min-width: 0; }
.hero-text .opening { max-width: 48ch; margin-block: 1.75rem; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 2rem; margin-top: 2rem; }
.primary-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 1.25rem; padding: .95rem 1.25rem; min-height: 54px; }
.text-link { display: inline-flex; align-items: center; gap: .75rem; padding-block: .6rem; margin-block: .1rem; }
.hero-art { align-self: center; min-width: 0; padding-top: 4rem; }
.archive-diagram { width: 100%; max-width: 24rem; aspect-ratio: 1; position: relative; margin-inline: auto; overflow: hidden; }
.archive-diagram span { position: absolute; display: block; }
.diagram-grid { inset: 0; }
.diagram-ring { width: 80%; height: 80%; inset: 10%; }
.ring-inner { width: 54%; height: 54%; inset: 23%; }
.diagram-plane { width: 57%; height: 63%; top: 10%; left: 29%; transform: rotate(-22deg); }
.axis-horizontal { width: 100%; height: 1px; top: 50%; left: 0; }
.axis-vertical { width: 1px; height: 100%; top: 0; left: 50%; }
.diagram-dot { width: 10px; height: 10px; top: calc(50% - 5px); left: calc(50% - 5px); }
.art-caption { padding-top: 1.5rem; margin-top: 1rem; }
.art-caption p { margin: 0; }
.art-caption .u-label { margin-bottom: .65rem; }
.home-reading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 4rem; padding-block: 1rem 3.5rem; }
.home-reading > div { min-width: 0; }
.route-section { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.4fr); gap: 4rem; padding-block: 3.5rem; }
.route-section p { max-width: 33ch; }
.route-list { margin: 0; padding: 0; list-style: none; }
.route-link { display: grid; grid-template-columns: 1fr auto; padding: 1.3rem 0; gap: .4rem 1rem; }
.route-link .u-label, .route-title, .route-detail { grid-column: 1; }
.route-arrow { grid-column: 2; grid-row: 1 / 4; align-self: center; padding: .75rem; }
.page-heading { max-width: 63rem; padding-block: 3rem 3.5rem; }
.page-heading h1 { max-width: 20ch; }
.page-deck { max-width: 43ch; margin-bottom: 0; }
.reading-grid { display: grid; grid-template-columns: minmax(0, 40rem) minmax(0, 18rem); gap: clamp(2.5rem, 7vw, 7rem); align-items: start; padding-bottom: 3rem; }
.reading-column { min-width: 0; }
.reading-section { padding-block: 1.75rem; }
.reading-section h2 { margin-top: 0; }
.reading-section > p, .opening { max-width: 65ch; }
.reading-section .text-link { display: flex; width: fit-content; max-width: 100%; }
.claim-pair { margin: 1.25rem 0 1.6rem; padding-block: 1.15rem .3rem; }
.claim-pair > p { margin-block: .6rem 1rem; }
.source-note { display: flex; flex-direction: column; align-items: start; gap: .1rem; padding-block: .75rem; }
.source-link { display: inline-flex; align-items: center; gap: .65rem; min-height: 44px; padding-block: .5rem; max-width: 100%; }
.conversation { margin-block: 1.5rem; padding: 1.3rem 1.5rem; }
.conversation p { margin: 0; }
.conversation .u-label { margin-bottom: .6rem; }
.note-list { padding-left: 1.35rem; margin-block: 1.25rem; }
.note-list li { padding: .4rem 0 .4rem .35rem; }
.margin-notes { padding-top: 1rem; }
.margin-notes p { margin-top: 0; }
.small-diagram { margin-block: 2.5rem 1.5rem; width: 13rem; max-width: 100%; }
.page-turn { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; padding-block: 2rem 3rem; margin-top: 1rem; }
.page-turn > div:last-child { justify-self: end; text-align: right; }
.page-turn p { margin: 0 0 .25rem; }
.site-footer { padding-block: 2rem 3rem; }
.site-footer p { max-width: 65ch; margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: .5rem 2.5rem; margin-top: 1.1rem; }
.worksheet { padding: 2rem; margin-block: 1.25rem 2rem; }
.worksheet h2 { margin-top: .75rem; }
.worksheet select { width: 100%; padding: .6rem .85rem; margin-top: .5rem; }
.worksheet fieldset { margin: 1.75rem 0; padding: 1rem 0 0; min-inline-size: 0; }
.worksheet legend { padding-right: .75rem; }
.amount-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1rem; }
.amount-field:last-child:nth-child(odd) { grid-column: 1 / -1; }
.amount-field label { display: block; margin-bottom: .4rem; }
.amount-input { display: flex; align-items: center; position: relative; }
.amount-input > span { position: absolute; left: .85rem; }
.amount-input input { width: 100%; padding: .6rem .75rem .6rem 2rem; }
.check-row { display: flex; gap: .75rem; align-items: center; min-height: 48px; padding-block: .5rem; cursor: pointer; }
.check-row input { min-width: 40px; min-height: 40px; width: 40px; height: 40px; flex-shrink: 0; margin: 0; }
.notes-label { display: block; margin-top: 1.5rem; }
.worksheet textarea { display: block; width: 100%; margin-top: .6rem; padding: .8rem; resize: vertical; }
.worksheet-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.5rem; }
.worksheet-actions button { padding: .75rem 1rem; }
.worksheet-result { margin-top: 1.5rem; padding-top: 1.25rem; }
.worksheet-result h3 { margin-top: 0; }
.worksheet-result ul { padding-left: 1.25rem; }
.worksheet-result li { padding-block: .35rem; }
.u-measure { max-width: 65ch; }
.u-stack > * + * { margin-top: 1rem; }
[hidden] { display: none !important; }
@media (max-width: 65rem) {
  .home-hero { gap: 2rem; grid-template-columns: minmax(0,1.4fr) minmax(0,1fr); }
  .home-reading, .route-section { gap: 2.5rem; }
  .reading-grid { grid-template-columns: minmax(0,1fr) minmax(0,14rem); gap: 3rem; }
}
@media (max-width: 47rem) {
  .masthead { grid-template-columns: 1fr; gap: 1.1rem; padding-block: 1.5rem .75rem; }
  .path-menu { width: 100%; }
  .path-menu summary { padding-left: 0; }
  .menu-panel { position: static; width: 100%; grid-template-columns: 1fr; gap: 1.5rem; padding: 1.25rem; margin-top: 1rem; }
  .home-hero { grid-template-columns: 1fr; padding-block: 2rem 3rem; gap: 2.5rem; }
  .hero-art { padding-top: 0; display: grid; grid-template-columns: 7.5rem 1fr; gap: 1rem; align-items: center; }
  .archive-diagram { max-width: 20rem; }
  .art-caption { margin: 0; padding: 1rem 0 1rem 1rem; }
  .home-reading, .route-section { grid-template-columns: 1fr; gap: 1.5rem; }
  .home-reading { padding-block: 0 2rem; }
  .route-section { padding-block: 2rem; }
  .page-heading { padding-block: 2rem 2.5rem; }
  .reading-grid { grid-template-columns: 1fr; gap: 2rem; }
  .margin-notes { display: none; }
  .page-turn { grid-template-columns: 1fr; gap: 1.5rem; padding-bottom: 2rem; }
  .page-turn > div:last-child { justify-self: start; text-align: left; }
  .site-footer { padding-bottom: 2rem; }
  .footer-links { gap: .25rem 1rem; flex-direction: column; align-items: start; }
  .worksheet { padding: 1.25rem; margin-inline: 0; }
  .amount-grid { grid-template-columns: 1fr; }
  .amount-field:last-child:nth-child(odd) { grid-column: auto; }
  .worksheet-actions { flex-direction: column; }
  .worksheet-actions button { width: 100%; }
}
@media print {
  .masthead, .site-footer, .page-turn, .margin-notes, .skip-link, .worksheet-actions, .archive-diagram { display: none; }
  main { max-width: none; padding: 0; }
  .page-heading { padding-block: 0 1rem; }
  .reading-grid { display: block; padding: 0; }
  .worksheet { break-inside: auto; }
  .claim-pair, .conversation, .amount-field { break-inside: avoid; }
  .worksheet fieldset, .reading-section { break-inside: auto; }
  a { min-height: 0; }
}