/* The Calibrated Earth · scientific companion website */
:root {
  --ink: #182b3c;
  --ink-soft: #425667;
  --muted: #637483;
  --blue: #175a89;
  --blue-dark: #104364;
  --blue-pale: #eef4f7;
  --paper: #fff;
  --wash: #f6f8f9;
  --line: #d7e0e5;
  --gold: #bca268;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.65 var(--sans); -webkit-font-smoothing: antialiased; }
[hidden] { display: none !important; }
img, svg { max-width: 100%; height: auto; }
img { display: block; }
a { color: var(--blue); text-underline-offset: .2em; text-decoration-thickness: 1px; }
a:hover { color: var(--blue-dark); }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea, summary { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid #b28c36; outline-offset: 4px; }
button:disabled { cursor: wait; opacity: .65; }
::selection { background: #d8e8f2; color: #102e44; }
p { margin: 0 0 1.1em; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.2; margin: 0 0 .55em; }
h1, h2 { font-family: var(--serif); font-weight: 400; letter-spacing: -.025em; }
h1 { font-size: clamp(2.35rem, 4.2vw, 3.75rem); }
h2 { font-size: clamp(1.9rem, 2.7vw, 2.7rem); }
h3 { font-size: 1.23rem; font-weight: 600; }
h4 { font-size: 1rem; }
ul, ol { padding-left: 1.35em; margin: .5em 0 1.25em; }
li + li { margin-top: .45em; }
figure { margin: 0; }
figcaption { padding-top: 10px; font: 12px/1.65 var(--sans); color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--line); margin: 30px 0; }
blockquote { margin: 28px 0; padding: 4px 0 4px 24px; border-left: 3px solid var(--gold); color: var(--ink-soft); font: 1.25rem/1.65 var(--serif); }
blockquote p:last-child { margin-bottom: 0; }
.wrap { width: min(1200px, calc(100% - 80px)); margin-inline: auto; }
.small { font-size: .85rem; line-height: 1.65; color: var(--muted); }
.lead { font-size: 1.13rem; line-height: 1.8; color: var(--ink-soft); max-width: 760px; }
.eyebrow { display: block; margin: 0 0 17px; color: var(--blue); font: 600 11px/1.5 var(--sans); letter-spacing: .15em; text-transform: uppercase; }
.skip-link { position: absolute; left: 18px; top: -100px; z-index: 1000; padding: 12px 18px; background: var(--ink); color: white; }
.skip-link:focus { top: 12px; }
.utility { background: var(--wash); border-bottom: 1px solid var(--line); }
.utility > .wrap { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 34px; padding-block: 6px; font-size: 10px; color: var(--muted); letter-spacing: .035em; }
.utility a { color: var(--ink-soft); text-decoration: none; }
.utility a:hover { text-decoration: underline; }
.site-header { background: white; border-bottom: 1px solid var(--line); }
.header-main { display: flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 103px; }
.brand { display: flex; flex-shrink: 0; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; }
.brand:hover { color: var(--ink); }
.brand img { width: 51px; height: 51px; }
.brand span { display: flex; flex-direction: column; }
.brand strong { font: 400 25px/1.2 var(--serif); letter-spacing: -.045em; }
.brand small { margin-top: 6px; color: var(--muted); font-size: 9px; line-height: 1.5; letter-spacing: .15em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { padding-block: 12px; font-size: 12px; font-weight: 600; text-decoration: none; color: var(--ink-soft); border-bottom: 2px solid transparent; white-space: nowrap; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--blue); border-color: var(--blue); }
#menu-toggle { display: none; border: 1px solid var(--line); background: white; padding: 8px 12px; color: var(--ink); font-size: 12px; }
.topic-nav { border-bottom: 1px solid var(--line); background: white; }
.topic-nav > .wrap { display: flex; align-items: center; gap: 26px; min-height: 44px; overflow-x: auto; scrollbar-width: thin; }
.topic-nav a { padding-block: 12px; color: var(--muted); text-decoration: none; font-size: 11px; white-space: nowrap; }
.topic-nav a:hover, .topic-nav a[aria-current="page"] { color: var(--blue); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 30px; color: var(--muted); font: 11px/1.65 var(--sans); }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 43px; padding: 11px 18px; border: 1px solid var(--blue); background: var(--blue); color: white; text-decoration: none; font-size: 12px; font-weight: 600; line-height: 1.5; transition: background .15s, border-color .15s; }
.button:hover { color: white; background: var(--blue-dark); border-color: var(--blue-dark); }
.button.secondary { background: white; border-color: #b8c6d0; color: var(--ink); }
.button.secondary:hover { background: var(--wash); border-color: var(--blue); color: var(--blue); }
.button.small { min-height: 35px; padding: 8px 13px; font-size: 11px; }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
.home-hero { display: grid; grid-template-columns: 1.03fr 1fr; gap: 65px; padding-top: 56px; padding-bottom: 44px; align-items: center; }
.home-hero h1 { max-width: 570px; font-size: clamp(2.7rem, 4.35vw, 3.7rem); line-height: 1.1; margin-bottom: 23px; }
.home-hero .lead { font-size: 16px; line-height: 1.85; margin-bottom: 0; }
.hero-visual { align-self: center; }
.hero-visual img { width: 100%; aspect-ratio: 1.2; object-fit: cover; border: 1px solid var(--line); }
.hero-visual figcaption { max-width: 490px; }
.fact-strip { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--line); margin-bottom: 8px; }
.fact-strip > div { padding: 21px 30px; border-right: 1px solid var(--line); }
.fact-strip > div:first-child { padding-left: 0; }
.fact-strip > div:last-child { border-right: 0; }
.fact-strip strong { display: block; font: 400 20px/1.3 var(--serif); margin-bottom: 5px; }
.fact-strip span { display: block; font-size: 11px; color: var(--muted); }
.section { padding-top: 55px; padding-bottom: 55px; }
.section + .section { border-top: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 36px; margin-bottom: 26px; }
.section-heading h2 { margin-bottom: 0; max-width: 650px; }
.section-heading > p { max-width: 440px; margin-bottom: 0; color: var(--muted); font-size: 13px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.feature { display: block; color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line); padding-bottom: 21px; }
.feature img { width: 100%; aspect-ratio: 1.62; object-fit: cover; margin-bottom: 20px; background: var(--wash); }
.feature h3 { font: 400 25px/1.25 var(--serif); letter-spacing: -.02em; margin-bottom: 10px; }
.feature p { color: var(--ink-soft); font-size: 13px; line-height: 1.8; margin-bottom: 17px; }
.feature > span { color: var(--blue); font-size: 11px; font-weight: 600; }
.feature:hover h3 { color: var(--blue); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.topic-grid, .research-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.topic { display: block; padding: 25px; border: 1px solid var(--line); color: var(--ink); text-decoration: none; background: white; }
.topic h3 { font: 400 23px/1.25 var(--serif); margin-bottom: 12px; }
.topic p { color: var(--ink-soft); font-size: 13px; line-height: 1.8; }
.topic p:last-child { margin-bottom: 0; }
.topic > span { color: var(--blue); font-size: 11px; font-weight: 600; }
.topic img { width: calc(100% + 50px); max-width: none; margin: -25px -25px 22px; aspect-ratio: 1.7; object-fit: cover; }
a.topic:hover { border-color: #8baabe; }
a.topic:hover h3 { color: var(--blue); }
.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; gap: 58px; }
.split h2 { font-size: 2.25rem; }
.split p { color: var(--ink-soft); font-size: 14px; }
.book-panel { display: grid; grid-template-columns: 166px minmax(0, 1fr); gap: 30px; padding: 28px; background: var(--wash); border: 1px solid var(--line); align-items: start; }
.book-panel > img, .book-panel > a > img, .book-panel > figure img { width: 100%; max-width: 190px; box-shadow: 0 4px 12px #182b3c12; }
.book-panel h2 { font-size: 2rem; }
.book-panel h3 { font: 400 25px/1.3 var(--serif); }
.book-panel p { color: var(--ink-soft); font-size: 13px; }
.notice, .status-note { background: var(--wash); border: 1px solid var(--line); border-left: 3px solid #769bb4; padding: 19px 22px; color: var(--ink-soft); font-size: 13px; line-height: 1.8; }
.notice > :last-child, .status-note > :last-child { margin-bottom: 0; }
.status-note { margin-top: 24px; }
.page-heading { padding-top: 30px; padding-bottom: 40px; }
.page-heading h1 { max-width: 910px; margin-bottom: 20px; }
.page-heading .lead { margin-bottom: 0; }
.page-heading .eyebrow { margin-bottom: 14px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 285px; gap: 64px; align-items: start; padding-bottom: 65px; }
.article-body { min-width: 0; font: 17px/1.85 var(--serif); }
.article-body h2 { font-size: 31px; line-height: 1.2; margin: 0 0 18px; }
.article-body h3 { font: 600 18px/1.4 var(--sans); margin-top: 27px; margin-bottom: 10px; }
.article-body > .page-figure { margin: 0 0 35px; }
.page-figure img { width: 100%; height: auto; border: 1px solid var(--line); }
.page-figure figcaption { padding-top: 12px; }
.article-section { padding-bottom: 33px; margin-bottom: 34px; border-bottom: 1px solid var(--line); scroll-margin-top: 25px; }
.article-section > :last-child { margin-bottom: 0; }
.article-body .lead { font: 1.17rem/1.8 var(--serif); }
.article-body .eyebrow { font-family: var(--sans); }
.article-body .button, .article-body .small, .article-body .notice, .article-body .status-note { font-family: var(--sans); }
.sidebar { font-size: 12px; line-height: 1.8; }
.sidebar-box { border-top: 2px solid var(--ink); padding-top: 17px; margin-bottom: 31px; }
.sidebar-box h2, .sidebar-box h3 { font: 600 12px/1.5 var(--sans); letter-spacing: .08em; text-transform: uppercase; margin-bottom: 15px; }
.sidebar-box p { color: var(--ink-soft); font-size: 12px; }
.sidebar-box img { margin: 15px 0; }
.sidebar-box .button { font-size: 11px; min-height: 37px; }
.sidebar-box > a:not(.button) { display: inline-block; }
.contents-list { list-style: none; padding: 0; margin: 0; }
.contents-list li { border-bottom: 1px solid var(--line); margin: 0; }
.contents-list a { display: block; padding: 9px 0; color: var(--ink-soft); text-decoration: none; line-height: 1.7; }
.contents-list a:hover { color: var(--blue); text-decoration: underline; }
.portrait { margin-bottom: 28px; }
.portrait img { width: 100%; height: auto; object-fit: contain; }
.source-list { font: 14px/1.7 var(--sans); padding-left: 1.3em; }
.source-list li { padding-left: 5px; margin-bottom: 20px; }
.source-list small { display: block; margin-top: 5px; color: var(--muted); font-size: 11px; overflow-wrap: anywhere; }
.source-list a { overflow-wrap: anywhere; }
.related-links { display: flex; flex-wrap: wrap; gap: 9px 20px; font: 12px/1.7 var(--sans); margin-top: 20px; }
.table-wrap { max-width: 100%; overflow-x: auto; margin: 24px 0; }
table { width: 100%; border-collapse: collapse; font: 13px/1.7 var(--sans); text-align: left; }
th, td { padding: 13px 15px; vertical-align: top; border: 1px solid var(--line); }
th { font-weight: 600; color: var(--ink); background: var(--wash); }
td { color: var(--ink-soft); }
.formula { margin: 24px 0; padding: 20px 23px; background: var(--wash); border: 1px solid var(--line); color: var(--ink); font: 14px/1.8 var(--mono); overflow-x: auto; }
.timeline { margin: 25px 0 0; padding-left: 23px; border-left: 1px solid #adc1cf; }
.timeline dt { position: relative; margin: 0 0 6px; font: 600 13px/1.6 var(--sans); color: var(--blue); }
.timeline dt::before { content: ""; position: absolute; width: 7px; height: 7px; left: -27px; top: 7px; background: var(--blue); border-radius: 50%; }
.timeline dd { margin: 0 0 25px; }
dl:not(.timeline) dt { font-weight: 600; margin-top: 20px; }
dl:not(.timeline) dd { margin-left: 0; margin-top: 5px; color: var(--ink-soft); }
.chapters details, .faq details { border-bottom: 1px solid var(--line); }
.chapters details:first-child, .faq details:first-child { border-top: 1px solid var(--line); }
.chapters summary, .faq summary { cursor: pointer; padding: 19px 24px 19px 0; font: 600 14px/1.7 var(--sans); }
.chapters summary:hover, .faq summary:hover { color: var(--blue); }
.chapters details > p, .faq details > p { margin-top: 0; padding-bottom: 8px; }
.chapters ol { font: 14px/1.8 var(--sans); padding-bottom: 12px; }
.filter-search { max-width: 560px; margin: 0 0 25px; }
.filter-search label { display: block; font-size: 12px; font-weight: 600; margin-bottom: 7px; }
.filter-search input { width: 100%; padding: 12px 14px; border: 1px solid #aebdc8; border-radius: 0; background: white; color: var(--ink); font-size: 14px; }
.research-grid { margin-bottom: 40px; }
.footer { border-top: 1px solid var(--line); background: var(--wash); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 45px; padding-top: 41px; padding-bottom: 35px; }
.footer h2 { font: 400 24px/1.3 var(--serif); }
.footer h3 { font: 600 10px/1.6 var(--sans); text-transform: uppercase; letter-spacing: .12em; margin-bottom: 16px; }
.footer p { max-width: 345px; font-size: 11px; line-height: 1.8; color: var(--muted); }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin: 0 0 8px; font-size: 11px; }
.footer a { color: var(--ink-soft); text-decoration: none; }
.footer a:hover { color: var(--blue); text-decoration: underline; }
.footer-bottom { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; border-top: 1px solid var(--line); padding-top: 19px; padding-bottom: 25px; font-size: 10px; color: var(--muted); }
.footer-bottom p { margin: 0; max-width: none; font-size: inherit; }
.footer-bottom > div { display: flex; gap: 18px; flex-wrap: wrap; }
.floating-contact { position: fixed; z-index: 30; right: 18px; bottom: 18px; display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }
.floating-contact a { min-height: 40px; display: inline-flex; justify-content: center; align-items: center; gap: 8px; padding: 10px 14px; border: 1px solid var(--line); background: white; color: var(--ink); text-decoration: none; font-size: 11px; box-shadow: 0 2px 8px #182b3c0d; }
.floating-contact a:hover { border-color: var(--blue); color: var(--blue); }
.floating-contact svg { width: 17px; height: 17px; flex-shrink: 0; }
.floating-contact .wa { border-color: #aecabd; color: #246148; }
.analytics-banner { position: fixed; z-index: 50; left: 20px; bottom: 20px; max-width: 420px; width: calc(100% - 40px); border: 1px solid #adbdc9; background: white; box-shadow: 0 6px 30px #182b3c18; padding: 20px; font: 12px/1.7 var(--sans); }
.analytics-banner p { margin-bottom: 13px; }
.analytics-banner .actions { margin-top: 12px; gap: 8px; }
.analytics-banner h2, .analytics-banner h3 { font: 600 14px/1.5 var(--sans); margin-bottom: 8px; }
.contact-section { padding-top: 18px; padding-bottom: 60px; }
.contact-layout { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(250px, 1fr); gap: 60px; }
.contact-form { padding: 29px; border: 1px solid var(--line); background: white; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 21px; }
.field { margin-bottom: 20px; }
.form-grid .field { margin: 0; }
.field.full, .field.wide, .form-grid > .full { grid-column: 1 / -1; }
.field label { display: block; font: 600 12px/1.6 var(--sans); margin-bottom: 7px; }
.field input, .field select, .field textarea { display: block; width: 100%; border: 1px solid #aebdc8; border-radius: 0; color: var(--ink); background: white; padding: 11px 12px; font: 14px/1.6 var(--sans); }
.field textarea { min-height: 145px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: #788692; }
.consent-label { display: flex; gap: 10px; align-items: flex-start; margin: 22px 0; font-size: 12px; line-height: 1.7; color: var(--ink-soft); }
.consent-label input { width: 16px; height: 16px; margin: 3px 0 0; flex-shrink: 0; accent-color: var(--blue); }
.message-panel { margin-top: 18px; padding: 15px; background: var(--blue-pale); border: 1px solid #b9ccd9; font-size: 13px; }
.form-note { color: var(--muted); font-size: 11px; line-height: 1.8; margin-top: 15px; }
.contact-detail { border-top: 1px solid var(--line); padding: 20px 0; }
.contact-detail h3 { font-size: 13px; }
.contact-detail p { font-size: 13px; color: var(--ink-soft); }
.contact-detail a { overflow-wrap: anywhere; }
.explorer { margin: 30px 0; border: 1px solid var(--line); padding: 26px; background: var(--wash); font-family: var(--sans); }
.explorer h3 { margin-top: 0; }
.explorer-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; align-items: start; }
.range-row { margin-bottom: 24px; }
.range-row label { display: flex; justify-content: space-between; gap: 20px; font-size: 12px; line-height: 1.5; margin-bottom: 12px; }
.range-row label span { font-weight: 600; color: var(--blue); }
.range-row input[type="range"] { width: 100%; accent-color: var(--blue); }
.dose-result { min-height: 155px; padding: 24px; background: white; border: 1px solid var(--line); display: flex; flex-direction: column; justify-content: center; }
.dose-result span { font-size: 11px; color: var(--muted); }
.dose-result strong { display: block; margin-block: 10px; font: 400 34px/1.2 var(--serif); color: var(--ink); }
.explorer-legend { margin-top: 20px; font: 11px/1.8 var(--sans); color: var(--muted); }
.explorer-legend p { margin-bottom: 8px; }
.gallery-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; margin: 26px 0; }
.gallery-grid img { width: 100%; height: auto; border: 1px solid var(--line); }
@media (min-width: 1400px) { .home-hero { gap: 75px; } }
@media (max-width: 1100px) {
  .wrap { width: calc(100% - 56px); }
  .header-main { gap: 18px; }
  .brand strong { font-size: 23px; }
  .brand img { width: 44px; height: 44px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 11px; }
  .home-hero { gap: 38px; }
  .home-hero h1 { font-size: 3rem; }
  .article-layout { gap: 38px; grid-template-columns: minmax(0, 1fr) 255px; }
  .split { gap: 35px; }
  .book-panel { grid-template-columns: 130px minmax(0, 1fr); gap: 20px; padding: 23px; }
  .footer-grid { gap: 27px; }
}
@media (max-width: 880px) {
  .header-main { min-height: 88px; flex-wrap: wrap; padding-block: 18px; }
  #menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
  .nav-links { display: none; width: 100%; flex-basis: 100%; gap: 0; padding-top: 8px; border-top: 1px solid var(--line); }
  .nav-links.is-open { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .nav-links a { padding: 10px 3px; font-size: 12px; }
  .topic-nav > .wrap { gap: 22px; }
  .home-hero { grid-template-columns: 1.06fr 1fr; gap: 30px; padding-top: 38px; }
  .home-hero h1 { font-size: 2.55rem; }
  .home-hero .lead { font-size: 14px; }
  .hero-visual img { aspect-ratio: 1; }
  .fact-strip strong { font-size: 18px; }
  .fact-strip > div { padding: 18px 20px; }
  .feature-grid { gap: 20px; }
  .feature h3 { font-size: 22px; }
  .topic-grid, .research-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-layout { grid-template-columns: minmax(0, 1fr) 215px; gap: 30px; }
  .article-body { font-size: 16px; }
  .article-body h2 { font-size: 28px; }
  .split { grid-template-columns: 1fr; gap: 30px; }
  .book-panel { grid-template-columns: 165px minmax(0, 1fr); }
  .contact-layout { gap: 30px; grid-template-columns: minmax(0, 1.5fr) minmax(210px, 1fr); }
  .contact-form { padding: 22px; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .footer-grid > :first-child p { max-width: 550px; }
}
@media (max-width: 650px) {
  html { scroll-padding-top: 16px; }
  .wrap { width: calc(100% - 36px); }
  .utility > .wrap { min-height: 32px; gap: 12px; font-size: 9px; }
  .utility > .wrap > :last-child { text-align: right; }
  .header-main { min-height: 84px; padding-block: 15px; }
  .brand { gap: 9px; }
  .brand img { width: 39px; height: 39px; }
  .brand strong { font-size: 21px; }
  .brand small { font-size: 7px; letter-spacing: .12em; margin-top: 5px; }
  #menu-toggle { padding: 7px 9px; font-size: 11px; }
  .topic-nav > .wrap { min-height: 41px; gap: 20px; }
  .topic-nav a { font-size: 10px; }
  .nav-links.is-open { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .home-hero { grid-template-columns: 1fr; gap: 29px; padding-top: 35px; padding-bottom: 29px; }
  .home-hero h1 { font-size: clamp(2.6rem, 9.4vw, 3.5rem); max-width: 510px; }
  .home-hero .lead { font-size: 15px; }
  .home-hero .actions { margin-top: 22px; }
  .hero-visual img { aspect-ratio: 1.48; }
  .hero-visual figcaption { font-size: 11px; }
  .fact-strip { grid-template-columns: 1fr; }
  .fact-strip > div, .fact-strip > div:first-child { padding: 15px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .fact-strip > div:last-child { border-bottom: 0; }
  .fact-strip strong { font-size: 19px; margin-bottom: 4px; }
  .fact-strip span { font-size: 11px; }
  .section { padding-block: 36px; }
  .section-heading { display: block; margin-bottom: 23px; }
  .section-heading h2 { font-size: 2rem; }
  .section-heading > p { margin-top: 13px; max-width: none; }
  .feature-grid { grid-template-columns: 1fr; gap: 29px; }
  .feature img { aspect-ratio: 1.75; margin-bottom: 16px; }
  .feature h3 { font-size: 26px; }
  .feature p { font-size: 14px; margin-bottom: 13px; }
  .topic-grid, .research-grid { grid-template-columns: 1fr; gap: 15px; }
  .topic { padding: 22px; }
  .topic img { width: calc(100% + 44px); margin: -22px -22px 20px; }
  .book-panel { grid-template-columns: 112px minmax(0, 1fr); gap: 20px; padding: 20px; }
  .book-panel h2, .book-panel h3 { font-size: 24px; }
  .book-panel p { font-size: 12px; }
  .book-panel .actions { margin-top: 15px; }
  .book-panel .button { min-height: 35px; font-size: 10px; padding: 8px 10px; }
  .page-heading { padding-top: 23px; padding-bottom: 30px; }
  .breadcrumb { margin-bottom: 24px; font-size: 10px; }
  .page-heading h1 { font-size: 2.55rem; }
  .lead { font-size: 16px; line-height: 1.8; }
  .article-layout { display: block; padding-bottom: 34px; }
  .article-body { font-size: 17px; line-height: 1.8; }
  .article-body h2 { font-size: 28px; }
  .article-body h3 { font-size: 17px; }
  .article-section { padding-bottom: 27px; margin-bottom: 29px; }
  .sidebar { display: grid; grid-template-columns: 1fr; gap: 0; margin-top: 35px; }
  .sidebar-box { margin-bottom: 26px; }
  .sidebar-box p, .contents-list a { font-size: 13px; }
  .sidebar-box > img { max-width: 180px; }
  .sidebar .portrait { max-width: 330px; }
  .table-wrap { margin-block: 20px; }
  table { font-size: 12px; }
  th, td { padding: 10px 12px; min-width: 115px; }
  .formula { padding: 17px; font-size: 12px; }
  .notice, .status-note { padding: 16px 18px; font-size: 12px; }
  .gallery-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 25px; padding-top: 30px; padding-bottom: 25px; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .footer h2 { font-size: 23px; }
  .footer p { font-size: 12px; }
  .footer li { font-size: 12px; margin-bottom: 9px; }
  .footer-bottom { display: block; padding-bottom: 82px; }
  .footer-bottom > div { margin-top: 11px; gap: 15px; }
  .floating-contact { right: 13px; bottom: 13px; flex-direction: row; gap: 8px; }
  .floating-contact a { width: 44px; height: 44px; min-height: 44px; padding: 0; border-radius: 50%; }
  .floating-contact a span { display: none; }
  .floating-contact svg { width: 19px; height: 19px; }
  .analytics-banner { left: 12px; bottom: 70px; width: calc(100% - 24px); max-width: 420px; padding: 17px; font-size: 11px; }
  .contact-section { padding-top: 0; padding-bottom: 35px; }
  .contact-layout { grid-template-columns: 1fr; gap: 28px; }
  .contact-form { padding: 20px; }
  .form-grid { gap: 18px; }
  .field input, .field select, .field textarea { font-size: 16px; }
  .explorer { padding: 19px; margin-block: 23px; }
  .explorer-grid { grid-template-columns: 1fr; gap: 0; }
  .dose-result { min-height: 135px; padding: 20px; }
  .dose-result strong { font-size: 32px; }
}
@media (max-width: 380px) {
  .brand strong { font-size: 19px; }
  .brand small { font-size: 6px; }
  .brand img { width: 34px; height: 34px; }
  .utility > .wrap { font-size: 8px; }
  .book-panel { grid-template-columns: 1fr; }
  .book-panel > img, .book-panel > a > img { width: 125px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
@media print {
  body { color: #000; font-size: 11pt; }
  .wrap { width: 100%; max-width: none; }
  .utility, .topic-nav, .nav-links, #menu-toggle, .floating-contact, .analytics-banner, .skip-link, .footer, .sidebar, .contact-form { display: none !important; }
  .site-header { margin-bottom: 22px; }
  .header-main { min-height: 75px; }
  .article-layout { display: block; }
  .home-hero { grid-template-columns: 1fr 1fr; gap: 24px; }
  .home-hero h1 { font-size: 30pt; }
  .article-body { font-size: 11pt; }
  .article-section, figure, .topic, .book-panel { break-inside: avoid; }
  h1, h2, h3 { break-after: avoid; }
  .button { border: 1px solid #888; background: white; color: #000; }
  a { color: #000; }
  .page-heading { padding-top: 0; }
}

/* Content-layout refinements for the supplied page structure. */
.section-heading {display:block;}
.section-heading h2 {margin-bottom:14px;}
.section-heading>.eyebrow {margin-bottom:12px;}
.section-heading>p {max-width:760px;}
.home-hero .lead {margin-bottom:1em;}
.article-body .contact-layout {grid-template-columns:1fr;gap:24px;}
.contact-detail {display:block;padding:10px 0;overflow-wrap:anywhere;}
.form-grid {margin-bottom:20px;}
.message-panel textarea {width:100%;padding:12px;font:14px/1.6 var(--sans);border:1px solid var(--line);resize:vertical;}
.dose-result strong span {font:inherit;color:inherit;display:inline;}
.dose-result>span>span {display:inline;}
.footer-bottom button {background:none;border:0;padding:0;color:inherit;text-decoration:underline;font:inherit;}
.article-body>figure {margin-bottom:30px;}
.motion-card {margin:24px 0;border:1px solid var(--line);background:var(--wash);padding:16px;}
.motion-card img {width:100%;height:auto;}
.motion-card figcaption {margin-bottom:12px;}
.motion-toggle {min-width:160px;}
.animation-grid {display:grid;grid-template-columns:1fr 1fr;gap:24px;}
@media(max-width:650px){.animation-grid{grid-template-columns:1fr}.contact-form{padding:18px}.dose-result strong{font-size:28px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}