/* Layout: Swiss 12-column grid on white. Duke Navy for type, Duke Royal Blue
   for full-bleed bands and the one accent. One grotesk family at two widths. */
:root {
  --white: #ffffff;
  --ink: #0c1a33;        /* body text, navy-tinted black */
  --navy: #012169;       /* Duke Navy: headlines, rules */
  --blue: #00539b;       /* Duke Royal Blue: bands, links, accent */
  --muted: #4f5b6b;
  --line: #dde2e8;
  --tint: #f2f5f9;       /* behind diagrams */
  --on-blue: #ffffff;
  --on-blue-muted: #c8d8ec;
  --focus: #e89923;

  --f-sans: "Archivo", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --max: 1240px;
  --gutter: 24px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font: 400 17px/1.65 var(--f-sans);
  font-stretch: 100%;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--navy); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

.wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
}
@media (max-width: 600px) { :root { --gutter: 16px; } }

.skip { position: absolute; left: -999px; top: 8px; background: var(--navy); color: var(--white); padding: 8px 12px; z-index: 20; }
.skip:focus { left: 16px; }

/* ---------- Header ---------- */
.site-header { border-bottom: 1px solid var(--line); background: var(--white); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px 24px; padding-block: 18px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--navy); }
.brand-logo { width: 48px; height: 48px; object-fit: contain; flex: none; }
.brand b { font-weight: 700; font-size: 16px; letter-spacing: 0.01em; text-transform: uppercase; }
.brand span { display: none; }
.nav { display: flex; gap: 4px 28px; flex-wrap: wrap; }
.nav a { font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none; color: var(--navy); padding-block: 6px; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { border-bottom-color: var(--blue); color: var(--blue); }

/* ---------- Type ---------- */
h1, h2, h3 { font-family: var(--f-sans); color: var(--navy); text-wrap: balance; margin: 0; }
h1 { font-weight: 800; font-size: clamp(42px, 6.4vw, 84px); line-height: 1; letter-spacing: -0.03em; }
h2 { font-weight: 700; font-size: clamp(28px, 3.4vw, 42px); line-height: 1.1; letter-spacing: -0.02em; }
h3 { font-weight: 700; font-size: 22px; line-height: 1.25; letter-spacing: -0.01em; }
p { margin: 0; }
.label { font-size: 12px; font-weight: 600; line-height: 1.35; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.lede { font-size: 22px; line-height: 1.45; color: var(--ink); max-width: 32em; letter-spacing: -0.005em; }
.prose { max-width: 66ch; display: grid; gap: 1em; }
.prose ul { margin: 0; padding-left: 1.1em; display: grid; gap: 0.45em; }
.prose li::marker { color: var(--blue); }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none;
  padding: 15px 22px; border: 2px solid var(--blue); border-radius: 999px;
  background: var(--blue); color: var(--white);
}
.btn:hover { background: var(--navy); border-color: var(--navy); color: var(--white); }
.btn.ghost { background: transparent; color: var(--blue); }
.btn.ghost:hover { background: var(--blue); border-color: var(--blue); color: var(--white); }

/* ---------- Home hero ---------- */
.hero { border-bottom: 1px solid var(--line); overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 0 var(--gutter); padding-block: 40px 56px; }
.mega {
  grid-column: 1 / -1;
  font-weight: 800; font-stretch: 62%;
  font-size: clamp(64px, 16.4vw, 214px); line-height: 0.86; letter-spacing: -0.01em;
  text-transform: uppercase; white-space: nowrap;
  padding-bottom: 36px; margin-bottom: 36px; border-bottom: 1px solid var(--line);
}
.hero .intro-label { grid-column: 1 / span 3; padding-top: 6px; }
.hero .intro { grid-column: 4 / span 5; display: grid; gap: 28px; align-content: start; }
.hero-photo { grid-column: 10 / span 3; margin: 0; }
.hero-photo img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.hero-photo figcaption { margin-top: 10px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Key figures: full-bleed Duke blue band ---------- */
.figures { background: var(--blue); color: var(--on-blue); }
.figures dl { margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.figures dl > div { padding: 40px var(--gutter) 40px 0; border-right: 1px solid rgba(255,255,255,0.28); display: grid; gap: 10px; align-content: start; }
.figures dl > div + div { padding-left: var(--gutter); }
.figures dl > div:last-child { border-right: 0; }
.figures dt { order: 2; font-size: 14px; line-height: 1.45; color: var(--on-blue-muted); max-width: 22ch; }
.figures dd { order: 1; margin: 0; font-weight: 800; font-stretch: 75%; font-size: 56px; line-height: 0.95; letter-spacing: -0.01em; font-variant-numeric: tabular-nums; }
.figures dd small { font-size: 18px; font-weight: 600; font-stretch: 100%; color: var(--on-blue-muted); margin-left: 6px; letter-spacing: 0.02em; }
@media (max-width: 860px) {
  .figures dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .figures dl > div { border-bottom: 1px solid rgba(255,255,255,0.28); padding-block: 28px; }
  .figures dl > div:nth-child(2n) { border-right: 0; }
  .figures dl > div:nth-child(2n+1) { padding-left: 0; }
  .figures dl > div:nth-last-child(-n+2) { border-bottom: 0; }
  .figures dd { font-size: 44px; }
}

/* ---------- Sections ---------- */
.section { padding-block: 80px; border-bottom: 1px solid var(--line); }
.section-head { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gutter); margin-bottom: 44px; }
.section-head .label { grid-column: 1 / span 3; padding-top: 8px; }
.section-head h2 { grid-column: 4 / span 8; }

/* Project index */
.projects { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--navy); }
.project { border-bottom: 1px solid var(--line); }
.project a {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gutter);
  padding-block: 32px; text-decoration: none; align-items: start; color: var(--ink);
}
.project .meta { grid-column: 1 / span 3; display: grid; gap: 6px; }
.project .body { grid-column: 4 / span 5; display: grid; gap: 10px; min-width: 0; }
.project .thumb { grid-column: 9 / span 4; aspect-ratio: 16 / 10; overflow: hidden; background: var(--tint); }
.project .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.project .role { font-weight: 600; color: var(--navy); }
.project p { color: var(--muted); }
.project .more { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--blue); }
.project a:hover h3 { color: var(--blue); }
.project a:hover .thumb img { transform: scale(1.03); }
@media (prefers-reduced-motion: reduce) { .project .thumb img { transition: none; } }

/* About strip */
.about-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gutter); }
.about-grid .prose { grid-column: 4 / span 5; }
.about-grid aside { grid-column: 10 / span 3; }
.about-grid aside dl { margin: 0; display: grid; gap: 16px; border-top: 2px solid var(--navy); padding-top: 16px; }
.about-grid aside dd { margin: 4px 0 0; color: var(--navy); font-weight: 500; }

/* Contact: full-bleed navy band */
.contact { background: var(--navy); color: var(--on-blue); padding-block: 80px; }
.contact .section-head .label { color: var(--on-blue-muted); }
.contact h2 { color: var(--on-blue); }
.contact-list { grid-column: 4 / span 9; list-style: none; margin: 0; padding: 0; border-top: 1px solid rgba(255,255,255,0.35); }
.contact-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gutter); }
.contact-list li { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 16px; padding-block: 18px; border-bottom: 1px solid rgba(255,255,255,0.35); align-items: baseline; }
.contact-list .label { color: var(--on-blue-muted); }
.contact-list a { color: var(--on-blue); font-size: clamp(20px, 2.4vw, 28px); font-weight: 600; letter-spacing: -0.01em; text-decoration: none; overflow-wrap: anywhere; }
.contact-list a:hover { text-decoration: underline; color: var(--on-blue); }

/* ---------- Project pages ---------- */
.page-head { background: var(--blue); color: var(--on-blue); }
.page-head .wrap { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 20px var(--gutter); padding-block: 56px 0; }
.page-head .crumbs { grid-column: 1 / -1; color: var(--on-blue-muted); }
.page-head .crumbs a { color: var(--on-blue); }
.page-head h1 { grid-column: 1 / -1; color: var(--on-blue); font-stretch: 75%; font-size: clamp(48px, 8vw, 112px); line-height: 0.92; letter-spacing: -0.015em; text-transform: uppercase; }
.page-head .lede { grid-column: 1 / span 8; color: var(--on-blue); }
.spec { grid-column: 1 / -1; margin: 24px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid rgba(255,255,255,0.35); }
.spec div { padding: 18px 16px 22px 0; display: grid; gap: 4px; }
.spec div + div { border-left: 1px solid rgba(255,255,255,0.35); padding-left: 16px; }
.spec .label { color: var(--on-blue-muted); }
.spec dd { margin: 0; font-weight: 600; }
@media (max-width: 760px) {
  .spec { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .spec div:nth-child(3) { border-left: 0; padding-left: 0; }
  .spec div:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,0.35); }
}
.page-head.plain { background: var(--white); color: var(--ink); border-bottom: 1px solid var(--line); }
.page-head.plain .wrap { padding-block: 56px 48px; }
.page-head.plain h1 { color: var(--navy); }
.page-head.plain .crumbs { color: var(--muted); }
.page-head.plain .crumbs a { color: var(--blue); }
.page-head.plain .lede { color: var(--ink); }

/* Cover photo: starts with white "walls" on both sides; site.js sets --p
   from 0 to 1 as the page scrolls, opening it to full width. */
.cover { margin: 0; --p: 1; }
.cover img {
  width: 100%; height: clamp(240px, 40vw, 520px); object-fit: cover;
  clip-path: inset(0 calc((1 - var(--p)) * clamp(8px, 7vw, 110px)));
}
.cover.diagram-cover img { height: auto; object-fit: contain; }

.chapter { padding-block: 72px; border-bottom: 1px solid var(--line); }
.chapter .wrap { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 36px var(--gutter); }
.chapter-label { grid-column: 1 / span 3; display: grid; gap: 8px; align-content: start; padding-top: 12px; border-top: 2px solid var(--navy); }
.chapter-label h2 { font-size: 26px; }
.chapter .prose { grid-column: 4 / span 7; }
.chapter .prose h3 { margin-top: 0.6em; }
.gallery { grid-column: 4 / span 9; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px var(--gutter); }
.gallery.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.gallery.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.gallery.solo { grid-template-columns: minmax(0, 340px); }
.gallery .wide { grid-column: 1 / -1; max-width: 760px; }

figure { margin: 0; }
.fig { display: grid; gap: 10px; align-content: start; }
.fig .frame { background: var(--tint); }
.fig .frame img { width: 100%; }
.fig .frame.photo img { aspect-ratio: 4 / 3; object-fit: cover; }
.fig .frame.tall img { aspect-ratio: 4 / 5; object-fit: cover; }
.fig .frame.diagram { padding: 14px; }
.fig .frame.diagram img { background: #fff; max-height: 360px; object-fit: contain; }
.fig .frame.diagram.tall { padding: 0; }
.fig .frame.diagram.tall img { max-height: none; }

/* Scroll-in: only applied by site.js to content below the first screen. */
.reveal { opacity: 0; transform: translateY(16px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .45s ease-out, transform .45s ease-out; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }
.fig figcaption { font-size: 14px; line-height: 1.45; color: var(--muted); }
.fig figcaption b { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--blue); margin-right: 8px; }
.video { position: relative; aspect-ratio: 16 / 9; background: var(--tint); }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.ext { display: inline-flex; gap: 8px; align-items: center; font-weight: 600; }

.pager .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); padding-block: 48px; }
.pager a { display: grid; gap: 6px; text-decoration: none; padding-top: 14px; border-top: 2px solid var(--navy); }
.pager a:last-child { text-align: right; }
.pager a b { font-size: 24px; font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; color: var(--navy); }
.pager a:hover b { color: var(--blue); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 32px; padding-block: 28px 36px; }
.site-footer p { font-size: 13px; color: var(--muted); }
.site-footer.dark { border-top: 0; background: var(--navy); }
.site-footer.dark p, .site-footer.dark a { color: var(--on-blue-muted); }
.site-footer.dark .wrap { border-top: 1px solid rgba(255,255,255,0.2); }

/* ---------- Narrow screens ---------- */
@media (max-width: 860px) {
  .hero .wrap { padding-block: 28px 44px; }
  .mega { white-space: normal; font-size: clamp(64px, 24vw, 160px); padding-bottom: 28px; margin-bottom: 28px; }
  .hero .intro-label, .hero .intro { grid-column: 1 / -1; }
  .hero .intro-label { margin-bottom: 14px; }
  .hero-photo { grid-column: 1 / -1; max-width: 320px; margin-top: 36px; }
  .section-head .label, .section-head h2,
  .project .meta, .project .body, .project .thumb,
  .about-grid .prose, .about-grid aside,
  .contact-list,
  .page-head .lede,
  .chapter-label, .chapter .prose, .gallery { grid-column: 1 / -1; }
  .section, .contact { padding-block: 56px; }
  .chapter { padding-block: 52px; }
  .project .thumb { order: -1; }
  .gallery.three, .gallery.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lede { font-size: 19px; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .gallery { grid-template-columns: minmax(0, 1fr); }
  .gallery.three, .gallery.four { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 12px; }
  .contact-list li { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .pager .wrap { grid-template-columns: minmax(0, 1fr); }
  .pager a:last-child { text-align: left; }
  .nav { gap: 4px 18px; }
}
.cover img.pos-top { object-position: 50% 28%; }