:root {
  --paper: #f8f7f3;
  --ink: #171717;
  --mustard: #d9b94c;
  --muted: #77766f;
  --line: #d9d7ce;
  --soft: #eeede7;
  --white: #fff;
  --page-width: 1220px;
  --display: "League Spartan", sans-serif;
  --body: "DM Sans", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--body); line-height: 1.65; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
::selection { color: var(--ink); background: var(--mustard); }
.page-shell { width: min(100% - 10vw, var(--page-width)); margin-inline: auto; }
.skip-link { position: absolute; top: -60px; left: 16px; z-index: 100; padding: 10px 14px; background: var(--ink); color: var(--white); }
.skip-link:focus { top: 12px; }
.reading-progress { position: fixed; inset: 0 0 auto; height: 3px; z-index: 40; background: transparent; }
.reading-progress span { display: block; width: 0; height: 100%; background: var(--mustard); }

.site-header { position: sticky; top: 0; z-index: 30; min-height: 76px; padding: 0 max(5vw, calc((100vw - var(--page-width)) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 28px; background: rgba(248,247,243,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.brand, .footer-brand { font-family: var(--display); font-weight: 800; font-size: 1.35rem; letter-spacing: -.055em; white-space: nowrap; }
.brand span, .footer-brand span { color: var(--mustard); }
.site-nav { display: flex; align-items: center; gap: clamp(16px, 2.7vw, 34px); font-size: .78rem; font-weight: 700; letter-spacing: .045em; text-transform: uppercase; }
.site-nav a { position: relative; padding: 28px 0 25px; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 18px; height: 2px; background: var(--mustard); transition: right .2s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.menu-toggle { display: none; }

.hero { min-height: 680px; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: clamp(32px, 5vw, 78px); padding-top: 76px; padding-bottom: 82px; position: relative; }
.hero-copy { position: relative; z-index: 2; }
.eyebrow { margin: 0 0 18px; color: var(--muted); font-size: .68rem; line-height: 1.4; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow-line { display: inline-block; width: 30px; height: 2px; margin: 0 9px 3px 0; background: var(--mustard); }
h1, h2, h3, h4, p { margin-top: 0; }
h1, h2, h3, h4 { font-family: var(--display); font-weight: 700; }
h1 { margin: 0; font-size: clamp(5.4rem, 11.6vw, 10.8rem); line-height: .79; letter-spacing: -.085em; }
h1 em, h2 em { color: var(--mustard); font-style: normal; }
.hero-tagline { margin: 30px 0 12px; font-size: 1.18rem; font-weight: 700; }
.hero-description { max-width: 540px; color: #5e5d57; font-size: .98rem; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 30px; flex-wrap: wrap; }
.button { display: inline-flex; min-height: 50px; padding: 0 20px; align-items: center; justify-content: center; gap: 22px; font-size: .82rem; font-weight: 700; transition: background .2s ease, color .2s ease, transform .2s ease; }
.button-dark { background: var(--ink); color: var(--white); border: 1px solid var(--ink); }
.button-dark:hover { color: var(--ink); background: var(--mustard); transform: translateY(-2px); }
.text-link { font-size: .82rem; font-weight: 700; border-bottom: 1px solid var(--ink); padding: 6px 0; }
.text-link span { margin-left: 8px; }
.hero-footnote { margin: 48px 0 0; color: var(--muted); font-size: .62rem; font-weight: 700; letter-spacing: .12em; }
.hero-footnote span { margin: 0 8px; color: var(--mustard); }
.hero-visual { min-height: 470px; position: relative; background: var(--soft); }
.hero-visual > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: saturate(.72); }
.image-tag { position: absolute; z-index: 1; padding: 8px 11px; color: var(--ink); background: var(--mustard); font-size: .61rem; font-weight: 800; letter-spacing: .12em; }
.tag-top { top: 18px; left: -17px; }
.hero-sticker { position: absolute; z-index: 2; right: -26px; bottom: 54px; width: 138px; height: 138px; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid var(--ink); border-radius: 50%; background: var(--paper); transform: rotate(9deg); font-family: var(--display); line-height: .95; }
.hero-sticker span:first-child { font-size: 2.1rem; font-weight: 800; }
.hero-sticker b { font-size: .7rem; }
.hero-sticker span:last-child { font-size: 1.15rem; font-weight: 800; }
.image-caption { position: absolute; right: 10px; bottom: 7px; margin: 0; color: #fff; font-size: .58rem; text-shadow: 0 1px 4px #000; }
.hero-index { position: absolute; right: 0; bottom: 22px; color: var(--muted); font-size: .62rem; letter-spacing: .13em; }

.pretest-band { display: grid; grid-template-columns: 1fr 250px; gap: 70px; align-items: center; padding: 56px clamp(28px, 6vw, 84px); background: var(--mustard); }
.pretest-copy { max-width: 620px; }
.pretest-copy .eyebrow { color: #54471c; }
.pretest-copy h2 { margin: 0 0 18px; font-size: clamp(2.6rem, 5vw, 4.7rem); line-height: .9; letter-spacing: -.06em; }
.pretest-copy > p:not(.eyebrow):not(.scan-instruction) { max-width: 510px; color: #403817; font-size: .93rem; }
.scan-instruction { display: flex; align-items: center; gap: 10px; margin: 24px 0 0; font-size: .78rem; font-weight: 800; }
.scan-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ink); }
.qr-card { width: 100%; max-width: 250px; padding: 18px; background: var(--white); border: 1px solid rgba(23,23,23,.18); }
.qr-label { display: block; margin-bottom: 12px; font-size: .61rem; font-weight: 800; letter-spacing: .14em; }
.qr-image { width: 100%; height: auto; image-rendering: pixelated; }
.qr-card p { margin: 11px 0 0; color: var(--muted); font-size: .65rem; text-align: center; }

.content-section { padding-top: 120px; padding-bottom: 120px; }
.section-heading { display: grid; grid-template-columns: 1.1fr .7fr; gap: 70px; align-items: end; margin-bottom: 54px; }
.section-heading h2 { margin: 0; font-size: clamp(3.5rem, 7.2vw, 6.7rem); line-height: .82; letter-spacing: -.075em; }
.section-intro { max-width: 460px; margin: 0 0 5px; color: var(--muted); font-size: .94rem; }
.concept-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: stretch; }
.concept-card { min-width: 0; border: 1px solid var(--line); background: #fbfaf7; }
.concept-image { height: 248px; position: relative; overflow: hidden; background: var(--soft); }
.concept-image img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.72); transition: transform .45s ease; }
.concept-card:hover .concept-image img { transform: scale(1.035); }
.concept-number { position: absolute; top: 14px; left: 14px; display: grid; place-items: center; width: 36px; height: 36px; background: var(--mustard); color: var(--ink); font-family: var(--display); font-size: 1.15rem; font-weight: 700; }
.concept-body { padding: 25px 24px 22px; }
.concept-kicker, .timeline-label, .document-type { margin: 0 0 9px; color: var(--muted); font-size: .6rem; line-height: 1.4; font-weight: 800; letter-spacing: .13em; }
.concept-body h3 { margin: 0 0 10px; font-size: 2.2rem; line-height: .95; letter-spacing: -.045em; }
.concept-body > p:not(.concept-kicker) { min-height: 82px; margin-bottom: 18px; color: #68675f; font-size: .83rem; }
.learn-more { border-top: 1px solid var(--line); }
.learn-more summary { display: flex; justify-content: space-between; align-items: center; gap: 15px; padding: 15px 0 2px; cursor: pointer; list-style: none; font-size: .75rem; font-weight: 800; }
.learn-more summary::-webkit-details-marker { display: none; }
.learn-more summary span { font-size: 1.1rem; transition: transform .2s ease; }
.learn-more[open] summary span { transform: rotate(45deg); }
.details-content { padding: 15px 0 2px; color: #65645e; font-size: .78rem; }
.details-content p { margin-bottom: 12px; }
.details-content strong { color: var(--ink); }
.key-note { display: flex; gap: 18px; align-items: flex-start; margin: 30px 0 92px; padding: 24px 28px; border-left: 4px solid var(--mustard); background: var(--soft); }
.key-note-mark { display: grid; flex: 0 0 34px; height: 34px; place-items: center; border-radius: 50%; color: var(--ink); background: var(--mustard); font-family: var(--display); font-weight: 800; }
.key-note strong { font-size: .91rem; }
.key-note p { margin: 4px 0 0; color: var(--muted); font-size: .82rem; }
.comparison-wrap { border-top: 1px solid var(--line); padding-top: 40px; }
.comparison-title h3 { margin: 0 0 24px; font-size: 2.3rem; line-height: 1; letter-spacing: -.04em; }
.table-scroll { overflow-x: auto; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.comparison-table { width: 100%; min-width: 760px; border-collapse: collapse; text-align: left; }
.comparison-table th, .comparison-table td { padding: 16px 17px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: .78rem; }
.comparison-table thead th { color: var(--ink); background: var(--mustard); font-size: .72rem; }
.comparison-table tbody th { width: 17%; font-weight: 800; }
.comparison-table td { color: #65645e; }

.case-section { padding: 115px 0 120px; background: var(--ink); color: var(--paper); }
.case-heading .section-intro { color: #b7b5ad; }
.case-heading h2 em { color: var(--mustard); }
.case-cover { position: relative; height: clamp(260px, 40vw, 480px); margin-bottom: 82px; background: #333; }
.case-cover img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.65) brightness(.72); }
.case-cover-label { position: absolute; left: 24px; top: 22px; display: flex; gap: 15px; align-items: center; padding: 10px 14px; color: var(--ink); background: var(--mustard); font-size: .68rem; letter-spacing: .1em; }
.case-cover-label span { font-weight: 700; }
.case-cover .image-caption { right: 18px; bottom: 15px; }
.case-intro-grid { display: grid; grid-template-columns: .65fr 1fr; gap: 80px; margin: 0 7% 92px; }
.case-intro-grid .eyebrow, .timeline-heading .eyebrow, .documentation-heading .eyebrow, .case-analysis .eyebrow, .question-panel .eyebrow { color: var(--mustard); }
.case-intro-grid h3 { margin: 0; font-size: clamp(2.7rem, 5vw, 4.4rem); line-height: .9; letter-spacing: -.06em; }
.case-intro-grid > div:last-child { color: #c5c3bb; font-size: .9rem; }
.case-intro-grid > div:last-child p:last-child { margin-bottom: 0; }
.timeline-heading { margin-bottom: 26px; }
.timeline-heading h3, .documentation-heading h3, .question-panel h3 { margin: 0; font-size: clamp(2.2rem, 4vw, 3.6rem); letter-spacing: -.05em; line-height: .95; }
.timeline { border-top: 1px solid #464641; }
.timeline-item { display: grid; grid-template-columns: 125px 1fr; gap: 24px; padding: 31px 0; border-bottom: 1px solid #464641; }
.timeline-date strong { display: block; color: var(--mustard); font-family: var(--display); font-size: 3.7rem; line-height: .8; }
.timeline-date span { display: block; margin-top: 8px; color: #aaa89f; font-size: .65rem; font-weight: 800; letter-spacing: .12em; }
.timeline-content { max-width: 760px; }
.timeline-label { color: var(--mustard); }
.timeline-content h4 { margin: 0 0 8px; font-size: 1.7rem; line-height: 1; }
.timeline-content p:not(.timeline-label) { margin-bottom: 13px; color: #c5c3bb; font-size: .83rem; }
.source-link { display: inline-block; margin: 4px 15px 4px 0; padding-bottom: 3px; border-bottom: 1px solid #88867d; color: var(--paper); font-size: .72rem; font-weight: 700; }
.source-link span { color: var(--mustard); }
.documentation-block { margin-top: 100px; }
.documentation-heading { max-width: 620px; margin-bottom: 28px; }
.documentation-heading > p:last-child { margin: 12px 0 0; color: #aaa89f; font-size: .85rem; }
.documentation-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.document-card { min-height: 205px; display: flex; flex-direction: column; padding: 20px; border: 1px solid #454540; background: #20201e; transition: background .2s, border-color .2s, transform .2s; }
.document-card:hover { background: #2a2925; border-color: var(--mustard); transform: translateY(-3px); }
.document-type { color: var(--mustard); }
.document-card strong { margin-bottom: 9px; font-family: var(--display); font-size: 1.55rem; line-height: .95; }
.document-card > span:not(.document-type) { color: #aaa89f; font-size: .74rem; }
.document-card b { margin-top: auto; padding-top: 19px; font-size: .68rem; }
.case-analysis { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 75px; }
.analysis-column { padding: 28px; border: 1px solid #454540; }
.analysis-known { background: #202723; }
.analysis-limit { background: #292720; }
.analysis-column h3 { margin: 0 0 14px; font-size: 1.75rem; line-height: 1; }
.analysis-column ul { margin: 0; padding-left: 18px; color: #c5c3bb; font-size: .79rem; }
.analysis-column li { margin: 8px 0; padding-left: 4px; }
.question-panel { margin-top: 72px; padding: 34px 38px; color: var(--ink); background: var(--mustard); }
.question-panel .eyebrow { color: #54471c; }
.question-panel h3 { margin-bottom: 22px; }
.question-panel ol { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin: 0; padding-left: 18px; }
.question-panel li { padding-left: 6px; font-size: .82rem; font-weight: 600; }

.verification-heading { margin-bottom: 45px; }
.verification-feature { display: grid; grid-template-columns: 1.05fr .95fr; min-height: 300px; margin-bottom: 60px; background: var(--soft); }
.verification-feature > img { width: 100%; height: 100%; min-height: 300px; object-fit: cover; filter: saturate(.65); }
.verification-feature-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(28px, 5vw, 58px); }
.verification-feature-copy h3 { margin: 0 0 15px; font-size: clamp(2.1rem, 4vw, 3.5rem); line-height: .92; letter-spacing: -.055em; }
.verification-feature-copy p:last-child { max-width: 430px; margin: 0; color: var(--muted); font-size: .85rem; }
.steps-list { border-top: 1px solid var(--ink); }
.verification-step { display: grid; grid-template-columns: 75px 1fr 35px; gap: 25px; align-items: start; padding: 28px 8px; border-bottom: 1px solid var(--line); }
.step-number { color: var(--mustard); font-family: var(--display); font-size: 2.8rem; font-weight: 700; line-height: .95; }
.verification-step h3 { margin: 0 0 7px; font-size: 1.8rem; line-height: 1; letter-spacing: -.035em; }
.verification-step p { max-width: 790px; margin: 0 0 9px; color: var(--muted); font-size: .84rem; }
.verification-step ul { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 0; padding-left: 16px; color: #62615b; font-size: .75rem; }
.step-symbol { color: var(--mustard); font-size: 1.6rem; font-weight: 700; text-align: right; }
.checklist-panel { margin-top: 72px; padding: clamp(25px, 5vw, 55px); background: var(--soft); }
.checklist-heading { max-width: 620px; }
.checklist-heading h3 { margin: 0 0 10px; font-size: clamp(2rem, 4vw, 3.4rem); line-height: .95; letter-spacing: -.05em; }
.checklist-heading > p:last-child { color: var(--muted); font-size: .85rem; }
.checklist-items { display: grid; grid-template-columns: 1fr 1fr; gap: 13px 30px; margin-top: 28px; }
.checklist-items label { display: flex; gap: 12px; align-items: flex-start; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: .8rem; cursor: pointer; }
.checklist-items input { width: 17px; height: 17px; flex: 0 0 17px; margin: 2px 0 0; accent-color: var(--ink); }
.checklist-progress { margin-top: 26px; }
.progress-track { height: 6px; overflow: hidden; background: #d7d5cc; }
.progress-track span { display: block; width: 0; height: 100%; background: var(--mustard); transition: width .2s ease; }
.checklist-progress p { margin: 9px 0 0; color: var(--muted); font-size: .69rem; font-weight: 700; }

.about-section { padding: 112px 0 108px; background: var(--mustard); }
.about-heading .eyebrow, .about-heading .section-intro { color: #54471c; }
.about-heading h2 em { color: var(--paper); }
.about-story { display: grid; grid-template-columns: .8fr 1fr; gap: 70px; padding: 40px 0; border-top: 1px solid rgba(23,23,23,.35); border-bottom: 1px solid rgba(23,23,23,.35); }
.about-statement span, .project-meta span { display: block; margin-bottom: 12px; color: #54471c; font-size: .62rem; font-weight: 800; letter-spacing: .14em; }
.about-statement p { max-width: 420px; margin: 0; font-family: var(--display); font-size: clamp(2.1rem, 4vw, 3.4rem); font-weight: 700; line-height: .93; letter-spacing: -.05em; }
.about-copy { color: #463b18; font-size: .87rem; }
.about-copy p:last-child { margin-bottom: 0; }
.project-meta { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 28px 0 54px; }
.project-meta div { padding-right: 15px; border-right: 1px solid rgba(23,23,23,.3); }
.project-meta div:last-child { border: 0; }
.project-meta span { margin-bottom: 5px; }
.project-meta strong { font-size: .8rem; }
.team-heading { margin-bottom: 18px; }
.team-heading .eyebrow { margin-bottom: 7px; color: #54471c; }
.team-heading h3 { margin: 0; font-size: 2.4rem; line-height: 1; }
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.team-card { min-height: 95px; display: flex; gap: 16px; align-items: center; padding: 18px; border: 1px solid rgba(23,23,23,.32); background: rgba(248,247,243,.24); }
.team-card span { color: #66551f; font-family: var(--display); font-size: 1.15rem; }
.team-card strong { font-size: .83rem; }
.institution { margin: 25px 0 0; font-size: .7rem; font-weight: 700; letter-spacing: .05em; }

.references-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; padding-top: 95px; padding-bottom: 95px; }
.references-heading h2 { margin: 0 0 15px; font-size: clamp(2.8rem, 5vw, 4.5rem); line-height: .9; letter-spacing: -.055em; }
.references-heading > p:last-child { max-width: 400px; color: var(--muted); font-size: .83rem; }
.reference-list { border-top: 1px solid var(--ink); }
.reference-list a { display: grid; grid-template-columns: 35px 1fr 20px; gap: 14px; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--line); }
.reference-list a > span { color: var(--mustard); font-family: var(--display); font-size: 1.2rem; font-weight: 700; }
.reference-list strong { display: block; font-size: .83rem; }
.reference-list small { display: block; margin-top: 3px; color: var(--muted); font-size: .69rem; }
.reference-list b { text-align: right; }
.reference-list a:hover strong { text-decoration: underline; text-decoration-color: var(--mustard); }
.legal-note { grid-column: 1 / -1; margin: -25px 0 0; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: .69rem; }

.posttest-band { background: var(--ink); color: var(--paper); }
.posttest-inner { display: grid; grid-template-columns: 1fr 250px; gap: 70px; align-items: center; padding-top: 90px; padding-bottom: 90px; }
.posttest-copy .eyebrow { color: var(--mustard); }
.posttest-copy h2 { margin: 0 0 20px; font-size: clamp(3.8rem, 8vw, 7.2rem); line-height: .8; letter-spacing: -.075em; }
.posttest-copy h2 em { color: var(--mustard); }
.posttest-copy > p:not(.eyebrow):not(.scan-instruction) { max-width: 570px; color: #b9b7ae; font-size: .9rem; }
.posttest-copy .scan-instruction { color: var(--paper); }
.posttest-copy .scan-dot { background: var(--mustard); }
.qr-card-post { justify-self: end; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 25px 5vw; background: var(--ink); border-top: 1px solid #454540; color: #aaa89f; }
.footer-brand { color: var(--paper); font-size: 1rem; }
.site-footer p { margin: 0; font-size: .72rem; }
.site-footer > span { font-size: .58rem; font-weight: 700; letter-spacing: .13em; }

@media (max-width: 900px) {
  .hero { min-height: 570px; gap: 28px; }
  .hero-visual { min-height: 390px; }
  .section-heading { gap: 35px; }
  .concept-grid { gap: 12px; }
  .concept-image { height: 190px; }
  .concept-body { padding: 20px 17px; }
  .concept-body h3 { font-size: 1.85rem; }
  .concept-body > p:not(.concept-kicker) { min-height: 110px; }
  .documentation-grid { grid-template-columns: repeat(2, 1fr); }
  .references-section { gap: 35px; }
}
@media (max-width: 680px) {
  html { scroll-padding-top: 70px; }
  .page-shell { width: min(100% - 11vw, var(--page-width)); }
  .site-header { min-height: 66px; padding: 0 5.5vw; }
  .brand { font-size: 1.2rem; }
  .menu-toggle { display: flex; width: 42px; height: 42px; flex-direction: column; align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--line); background: transparent; cursor: pointer; }
  .menu-toggle span { width: 17px; height: 2px; background: var(--ink); transition: transform .2s; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 5.5vw 15px; background: var(--paper); border-bottom: 1px solid var(--line); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 13px 0; border-bottom: 1px solid var(--line); }
  .site-nav a::after { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 35px; padding-top: 65px; padding-bottom: 50px; }
  h1 { font-size: clamp(5.3rem, 22vw, 8rem); }
  .hero-tagline { margin-top: 25px; }
  .hero-description { font-size: .9rem; }
  .hero-visual { min-height: 330px; margin-right: 9px; }
  .hero-sticker { width: 112px; height: 112px; right: -15px; bottom: 35px; }
  .hero-sticker span:first-child { font-size: 1.7rem; }
  .hero-sticker span:last-child { font-size: .95rem; }
  .hero-index { display: none; }
  .pretest-band { width: 100%; grid-template-columns: 1fr; gap: 28px; padding: 43px 6vw; }
  .pretest-copy h2 { font-size: 3.25rem; }
  .qr-card { max-width: 220px; justify-self: center; }
  .content-section { padding-top: 82px; padding-bottom: 82px; }
  .section-heading { grid-template-columns: 1fr; gap: 20px; margin-bottom: 34px; }
  .section-heading h2 { font-size: clamp(3.5rem, 15vw, 5.2rem); }
  .section-intro { font-size: .87rem; }
  .concept-grid { grid-template-columns: 1fr; gap: 16px; }
  .concept-image { height: 235px; }
  .concept-body { padding: 23px; }
  .concept-body h3 { font-size: 2.2rem; }
  .concept-body > p:not(.concept-kicker) { min-height: 0; }
  .key-note { margin-bottom: 65px; padding: 19px; }
  .comparison-title h3 { font-size: 2rem; }
  .case-section { padding: 82px 0; }
  .case-cover { height: 270px; margin-bottom: 58px; }
  .case-intro-grid { grid-template-columns: 1fr; gap: 22px; margin: 0 0 65px; }
  .case-intro-grid h3 { font-size: 3.3rem; }
  .timeline-heading h3, .documentation-heading h3, .question-panel h3 { font-size: 2.5rem; }
  .timeline-item { grid-template-columns: 70px 1fr; gap: 14px; padding: 24px 0; }
  .timeline-date strong { font-size: 2.8rem; }
  .timeline-date span { font-size: .56rem; }
  .timeline-content h4 { font-size: 1.4rem; }
  .timeline-content p:not(.timeline-label) { font-size: .78rem; }
  .documentation-block { margin-top: 68px; }
  .documentation-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .document-card { min-height: 190px; padding: 15px; }
  .document-card strong { font-size: 1.3rem; }
  .document-card > span:not(.document-type) { font-size: .68rem; }
  .case-analysis { grid-template-columns: 1fr; margin-top: 54px; }
  .analysis-column { padding: 22px; }
  .question-panel { margin-top: 52px; padding: 26px 23px; }
  .question-panel ol { grid-template-columns: 1fr; gap: 13px; }
  .verification-feature { grid-template-columns: 1fr; }
  .verification-feature > img { min-height: 220px; height: 220px; }
  .verification-feature-copy { padding: 27px; }
  .verification-feature-copy h3 { font-size: 2.5rem; }
  .verification-step { grid-template-columns: 50px 1fr; gap: 13px; padding: 23px 0; }
  .step-number { font-size: 2.1rem; }
  .verification-step h3 { font-size: 1.5rem; }
  .verification-step ul { display: block; }
  .verification-step li { margin: 5px 0; }
  .step-symbol { display: none; }
  .checklist-panel { margin-top: 52px; padding: 25px 20px; }
  .checklist-items { grid-template-columns: 1fr; gap: 3px; }
  .about-section { padding: 82px 0; }
  .about-story { grid-template-columns: 1fr; gap: 25px; padding: 30px 0; }
  .about-statement p { font-size: 2.7rem; }
  .project-meta { grid-template-columns: 1fr 1fr; gap: 20px 12px; padding-bottom: 42px; }
  .project-meta div:nth-child(2) { border: 0; }
  .project-meta strong { font-size: .72rem; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .team-card { min-height: 90px; gap: 9px; padding: 13px; }
  .team-card strong { font-size: .72rem; }
  .references-section { grid-template-columns: 1fr; gap: 25px; padding-top: 75px; padding-bottom: 75px; }
  .legal-note { margin-top: 0; }
  .posttest-inner { grid-template-columns: 1fr; gap: 30px; padding-top: 70px; padding-bottom: 70px; }
  .posttest-copy h2 { font-size: 5rem; }
  .qr-card-post { justify-self: center; }
  .site-footer { align-items: flex-start; flex-direction: column; gap: 7px; padding: 22px 6vw; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}