:root {
  color-scheme: light;
  --ink: #172c43;
  --muted: #52657a;
  --teal: #096c7d;
  --teal-dark: #045363;
  --line: #d7e1e8;
  --paper: #fff;
  --canvas: #f4f8fa;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 1.5rem; }
body { margin: 0; background: var(--canvas); color: var(--ink); line-height: 1.65; }
a { color: var(--teal); text-underline-offset: .2em; }
a:hover { color: var(--teal-dark); }
a:focus-visible, summary:focus-visible { outline: 3px solid #0987a0; outline-offset: 5px; border-radius: 4px; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.18; text-wrap: balance; }
h2 { font-size: clamp(1.45rem, 2.7vw, 2rem); letter-spacing: -.025em; margin-bottom: 1.25rem; }
.container { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; top: 12px; left: 16px; z-index: 10; background: var(--paper); padding: 12px 20px; border: 2px solid var(--teal); border-radius: 8px; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.site-header { background: var(--paper); border-bottom: 1px solid var(--line); }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 92px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-size: 1.65rem; font-weight: 780; font-style: italic; letter-spacing: -.035em; text-decoration: none; }
.brand img { flex-shrink: 0; object-fit: contain; }
.header-actions { display: flex; align-items: center; gap: 24px; }
.language-switch { display: flex; padding: 3px; border: 1px solid var(--line); border-radius: 9px; background: var(--canvas); }
.language-switch a { display: inline-flex; align-items: center; justify-content: center; min-width: 42px; min-height: 40px; border-radius: 6px; text-decoration: none; font-size: .82rem; font-weight: 750; color: var(--muted); }
.language-switch a[aria-current] { background: var(--teal); color: #fff; }
.topic-nav { display: flex; flex-wrap: wrap; column-gap: 28px; row-gap: 0; }
.topic-nav a { padding: 13px 0 14px; color: var(--muted); font-size: .88rem; font-weight: 650; text-decoration: none; border-bottom: 3px solid transparent; }
.topic-nav a[aria-current] { color: var(--teal); border-color: var(--teal); }
.topic-nav a:hover { color: var(--teal); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 16px; padding: 14px 22px; min-height: 50px; border: 1px solid var(--teal); border-radius: 9px; background: var(--teal); color: #fff; text-decoration: none; font-size: .95rem; font-weight: 700; line-height: 1.35; }
.button:hover { background: var(--teal-dark); border-color: var(--teal-dark); color: #fff; }
.button-small { min-height: 44px; padding: 11px 17px; font-size: .86rem; }
.button span { font-size: 1.25em; }
.breadcrumb { padding-top: 27px; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 9px; margin: 0; padding: 0; font-size: .8rem; color: var(--muted); }
.breadcrumb li + li::before { content: "/"; padding-right: 9px; color: #8a9ba9; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.hero { max-width: 1000px; padding: 42px 0 54px; }
.eyebrow { margin-bottom: 19px; color: var(--teal); font-size: .79rem; font-weight: 750; letter-spacing: .09em; text-transform: uppercase; }
h1 { margin-bottom: 24px; font-size: clamp(2.35rem, 4.7vw, 3.8rem); letter-spacing: -.045em; }
.lead { max-width: 850px; color: var(--muted); font-size: clamp(1.03rem, 1.8vw, 1.2rem); line-height: 1.75; margin-bottom: 28px; }
.anatomy-preview { margin: 0 0 64px; border: 1px solid #dce4e5; border-radius: 20px; overflow: hidden; background: #edf2f1; }
.anatomy-preview-heading { padding: 32px 28px 0; text-align: center; }
.anatomy-preview-heading .eyebrow { margin-bottom: 10px; }
.anatomy-preview-heading h2 { margin-bottom: 0; font-size: clamp(1.45rem, 2.8vw, 2rem); letter-spacing: -.035em; }
.anatomy-model-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; max-width: 900px; margin-inline: auto; padding: 26px 28px 22px; }
.anatomy-model { min-width: 0; overflow: hidden; border: 1px solid #e2e8e7; border-radius: 13px; background: var(--paper); }
.anatomy-model img { width: 100%; height: auto; aspect-ratio: 18 / 19; object-fit: cover; object-position: center bottom; }
.anatomy-model-label { margin: 0; padding: 14px 16px 16px; border-top: 1px solid #edf0ef; color: var(--ink); font-size: .9rem; font-weight: 700; line-height: 1.45; text-align: center; }
.anatomy-model-label span { display: block; margin-top: 3px; color: var(--muted); font-size: .75rem; font-weight: 450; }
.anatomy-preview figcaption { max-width: 700px; margin-inline: auto; padding: 0 28px 26px; color: var(--muted); font-size: .88rem; line-height: 1.65; text-align: center; text-wrap: balance; }
.reading-layout { display: grid; grid-template-columns: 235px minmax(0, 1fr); column-gap: 66px; align-items: start; border-top: 1px solid var(--line); padding-top: 44px; }
.contents { position: sticky; top: 30px; }
.contents-title { font-size: .8rem; font-weight: 750; text-transform: uppercase; letter-spacing: .07em; margin-bottom: 17px; }
.contents ol { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--line); }
.contents li { margin: 0; }
.contents a { display: block; font-size: .84rem; line-height: 1.6; padding: 8px 0 8px 16px; color: var(--muted); text-decoration: none; }
.contents a:hover { color: var(--teal); }
.article { max-width: 800px; }
.content-section { margin-bottom: 42px; }
.content-section p { color: #41566b; font-size: 1.03rem; line-height: 1.85; margin-bottom: 17px; }
.faq-section { margin: 4px 0 30px; }
.faq-section details { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; margin-bottom: 12px; }
.faq-section summary { padding: 20px 22px; font-weight: 670; font-size: .97rem; line-height: 1.5; cursor: pointer; }
.faq-section summary::marker { color: var(--teal); }
.faq-section details[open] summary { color: var(--teal); }
.faq-section details p { padding: 0 22px 20px; margin: 0; color: var(--muted); font-size: .96rem; line-height: 1.75; }
.related-section { border-top: 1px solid var(--line); margin-top: 50px; padding-top: 42px; }
.related-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.related-card { display: flex; flex-direction: column; align-items: flex-start; background: var(--paper); padding: 28px; border: 1px solid var(--line); border-radius: 13px; text-decoration: none; color: var(--ink); }
.related-card:hover { border-color: #91b7c0; background: #fcfefe; color: var(--ink); }
.related-card h3 { font-size: 1.18rem; margin-bottom: 14px; }
.related-card p { color: var(--muted); font-size: .9rem; line-height: 1.75; margin-bottom: 24px; }
.related-card > span { color: var(--teal); font-size: .86rem; font-weight: 720; margin-top: auto; }
.related-card > span span { margin-left: 8px; }
.app-callout { display: flex; align-items: center; justify-content: space-between; gap: 28px; background: #e2f0f2; border: 1px solid #c8e0e4; border-radius: 15px; padding: 35px; margin-block: 52px; }
.app-callout h2 { font-size: 1.55rem; margin-bottom: 10px; }
.app-callout p { color: var(--muted); font-size: .98rem; margin: 0; }
.app-callout .button { flex-shrink: 0; }
.site-footer { display: flex; align-items: center; gap: 24px; padding-block: 26px 35px; border-top: 1px solid var(--line); font-size: .82rem; }
.footer-brand { font-size: 1.12rem; font-weight: 750; color: var(--ink); text-decoration: none; }
.site-footer p { color: var(--muted); margin: 0 auto 0 0; }
.legal-entity { display: block; margin-top: 5px; font-size: .75rem; }
.site-footer > a:last-child { flex-shrink: 0; }
@media (max-width: 900px) {
  .reading-layout { grid-template-columns: 200px minmax(0, 1fr); column-gap: 36px; }
  .related-grid { gap: 14px; }
  .related-card { padding: 23px; }
  .app-callout { align-items: flex-start; flex-direction: column; }
  .site-footer { flex-wrap: wrap; gap: 12px 20px; }
  .site-footer p { flex-basis: 70%; }
}
@media (max-width: 700px) {
  .container { width: calc(100% - 40px); }
  .header-row { min-height: 80px; }
  .brand { font-size: 1.45rem; gap: 9px; }
  .brand img { width: 36px; height: 36px; }
  .header-actions { gap: 12px; }
  .header-app { display: none; }
  .topic-nav { column-gap: 22px; }
  .topic-nav a { padding-block: 10px 11px; font-size: .81rem; }
  .hero { padding-top: 30px; padding-bottom: 36px; }
  .eyebrow { font-size: .69rem; letter-spacing: .06em; margin-bottom: 16px; }
  h1 { margin-bottom: 20px; font-size: clamp(2.1rem, 7.2vw, 3rem); }
  .anatomy-preview { margin-bottom: 35px; border-radius: 14px; }
  .anatomy-preview-heading { padding: 24px 16px 0; }
  .anatomy-preview-heading .eyebrow { margin-bottom: 9px; }
  .anatomy-preview-heading h2 { font-size: clamp(1.3rem, 4.6vw, 1.8rem); line-height: 1.3; }
  .anatomy-model-grid { gap: 10px; padding: 20px 12px 16px; }
  .anatomy-model { border-radius: 8px; }
  .anatomy-model-label { padding: 10px 5px 12px; font-size: .76rem; }
  .anatomy-model-label span { font-size: .66rem; }
  .anatomy-preview figcaption { padding: 0 18px 22px; font-size: .8rem; }
  .reading-layout { display: block; padding-top: 26px; }
  .contents { position: static; margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
  .contents ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 18px; }
  .contents a { font-size: .78rem; padding-left: 12px; }
  .content-section { margin-bottom: 33px; }
  .content-section p { font-size: 1rem; line-height: 1.8; }
  .faq-section summary { padding: 18px; font-size: .94rem; }
  .faq-section details p { padding: 0 18px 18px; }
  .related-section { margin-top: 34px; padding-top: 30px; }
  .related-grid { grid-template-columns: 1fr; }
  .related-card { padding: 24px; }
  .related-card p { margin-bottom: 17px; }
  .app-callout { padding: 25px; margin-block: 34px; }
  .site-footer { padding-bottom: 28px; }
  .site-footer p { flex-basis: 100%; order: 3; }
  .site-footer > a:last-child { margin-left: auto; }
}
@media (max-width: 380px) {
  .container { width: calc(100% - 32px); }
  .brand { font-size: 1.25rem; }
  .language-switch a { min-width: 36px; min-height: 36px; }
  .topic-nav { column-gap: 18px; }
  .contents ol { grid-template-columns: 1fr; }
  .button { width: 100%; }
}
@media (prefers-reduced-motion: no-preference) {
  .button, .related-card, .language-switch a { transition: background-color .15s ease, border-color .15s ease; }
}
@media print {
  .site-header, .contents, .button, .related-section, .app-callout, .skip-link { display: none; }
  body { background: #fff; }
  .container { width: 100%; }
  .reading-layout { display: block; }
  .hero { padding-block: 20px; }
  .content-section, details { break-inside: avoid; }
  .faq-section details > p { display: block; }
  .anatomy-preview { max-width: 600px; }
}

/* Localized workflow navigation. */
.workflow-journey { margin: 0 0 44px; padding: 25px; border: 1px solid #cbdfe3; border-radius: 18px; background: #eaf3f4; }
.workflow-journey .eyebrow { margin-bottom: 16px; }
.workflow-journey ol { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); list-style: none; padding: 0; margin: 0; gap: 12px; }
.workflow-journey a { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px; padding: 16px; border-radius: 12px; background: #fff; border: 1px solid #d5e4e7; color: var(--ink); text-decoration: none; }
.workflow-journey a:hover { border-color: var(--teal); background: #f8ffff; }
.workflow-journey svg { width: 26px; height: 26px; color: var(--teal); }
.journey-number { font: 700 .75rem ui-monospace,monospace; letter-spacing: .06em; color: #61778a; }
.workflow-journey strong { font-size: .95rem; }
.journey-arrow { color: var(--teal); justify-self: end; }

/* Native screenshots retain their full frame and open at original resolution. */
.workflow-capture { margin: 0 0 26px; border: 1px solid #ccdde3; border-radius: 16px; overflow: hidden; background: #edf3f6; }
.workflow-capture figcaption { padding: 20px 24px; background: #fff; border-bottom: 1px solid #d6e3e7; }
.workflow-capture figcaption strong { display: block; font-size: 1.08rem; line-height: 1.45; }
.workflow-kicker { display: block; font-size: .67rem; letter-spacing: .08em; text-transform: uppercase; color: var(--teal); font-weight: 750; margin-bottom: 6px; }
.capture-gallery { padding: 20px; }
.capture-item { min-width: 0; }
.capture-image-link { display: block; overflow: hidden; border: 1px solid #bdced8; border-radius: 10px; background: #101723; box-shadow: 0 10px 28px #172c4314; }
.capture-image-link:hover { outline: 2px solid var(--teal); outline-offset: 3px; }
.capture-image-link img { width: 100%; height: auto; }
.capture-notes { padding: 18px 2px 0; }
.content-section .capture-notes p { font-size: .88rem; line-height: 1.65; margin-bottom: 10px; }
.capture-disclosure { display: block; font-size: .73rem; color: var(--muted); line-height: 1.6; margin-bottom: 10px; }
.capture-enlarge { display: inline-block; font-weight: 700; font-size: .8rem; padding: 6px 0; }
.capture-portrait { display: grid; grid-template-columns: minmax(0,300px) minmax(0,1fr); align-items: center; gap: 24px; }
.capture-portrait .capture-image-link { border-radius: 16px; }
.capture-portrait .capture-notes { padding: 0; }
.capture-pair { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; align-items: start; }
.capture-pair .capture-portrait { display: block; }
.capture-pair .capture-notes { padding-top: 18px; }
@media (max-width:700px) {
 .workflow-journey { padding: 17px; margin-bottom: 30px; }
 .workflow-journey ol { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
 .workflow-journey a { padding: 12px; }
 .workflow-journey strong { font-size: .86rem; }
 .workflow-capture figcaption { padding: 17px; }
 .capture-gallery { padding: 12px; }
 .capture-portrait { display: block; max-width: 360px; margin-inline: auto; }
 .capture-portrait .capture-notes { padding-top: 18px; }
 .capture-pair { grid-template-columns: 1fr; gap: 28px; }
}
@media print { .workflow-capture { break-inside: avoid; } .workflow-journey { display:none; } }