/* Stansfeld Research Group — site styles */
:root {
  --accent: #1f56a3;
  --accent-deep: #173f78;
  --link: #1f56a3;
  --ink: #1c1f24;
  --muted: #5b616a;
  --bg: #fafafa;
  --surface: #ffffff;
  --line: #e3e6ea;
  --tint: #eef3f9;
  --footer: #1e2329;
  --radius: 14px;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Source Sans 3", system-ui, -apple-system, "Segoe UI", sans-serif;
  --wrap: 1100px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 var(--sans);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-underline-offset: 2px; }
a:hover { color: var(--accent); }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.2; color: var(--ink); }
h1 { font-size: clamp(2rem, 4vw, 2.6rem); margin: 0 0 .4em; letter-spacing: -.01em; }
h2 { font-size: 1.6rem; margin: 2em 0 .8em; }
h3 { font-size: 1.15rem; margin: 0 0 .25em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; top: 0; background: #fff; padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* ---------- Header ---------- */
.site-header {
  position: relative;
  background: #2b2b2b center/cover no-repeat;
  color: #fff;
}
.site-header::before {
  content: "";
  position: absolute; inset: 0;
  /* neutral shade behind the title only, so the photo keeps its true colours */
  background: linear-gradient(90deg, rgba(0,0,0,.55) 0%, rgba(0,0,0,.3) 40%, rgba(0,0,0,0) 70%);
}
.brand { text-shadow: 0 1px 3px rgba(0,0,0,.45); }
.site-header .wrap {
  position: relative;
  display: flex; align-items: center; gap: 22px;
  padding-top: 52px; padding-bottom: 52px;
}
.brand-logo {
  flex: none;
  background: #fff; border-radius: 12px; padding: 8px;
  width: 92px; height: 92px; display: grid; place-items: center;
}
.brand-logo img { max-height: 76px; width: auto; }
.brand a { color: #fff; text-decoration: none; }
.brand-title { font-family: var(--serif); font-size: clamp(1.7rem, 4vw, 2.5rem); font-weight: 600; line-height: 1.1; margin: 0; }
.brand-tag { margin: 6px 0 0; font-size: 1.1rem; opacity: .88; letter-spacing: .01em; }

/* ---------- Nav ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 5;
  background: rgba(255,255,255,.96);
  backdrop-filter: saturate(1.2) blur(6px);
  border-bottom: 1px solid var(--line);
}
.site-nav ul {
  list-style: none; margin: 0 auto; padding: 0 12px;
  max-width: var(--wrap);
  display: flex; gap: 4px;
  overflow-x: auto; scrollbar-width: none;
}
.site-nav ul::-webkit-scrollbar { display: none; }
.site-nav a {
  display: block; white-space: nowrap;
  padding: 14px 12px 12px;
  color: var(--muted); text-decoration: none; font-weight: 600; font-size: .95rem;
  border-bottom: 3px solid transparent;
}
.site-nav a:hover { color: var(--accent); }
.site-nav a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- Page ---------- */
main { padding: 44px 0 72px; }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 46em; margin: 0 0 1.6em; }
.prose { max-width: 46em; overflow-wrap: anywhere; }
.prose p { margin: 0 0 1.1em; }
.banner {
  width: 100%; aspect-ratio: 21 / 8; object-fit: cover;
  border-radius: var(--radius); margin: 0 0 36px; background: var(--tint);
}
.section-title {
  font-family: var(--sans); text-transform: uppercase; letter-spacing: .08em;
  font-size: .85rem; font-weight: 700; color: var(--accent);
  margin: 48px 0 18px; padding-bottom: 8px; border-bottom: 1px solid var(--line);
}

figure { margin: 28px 0 40px; }
figure img {
  border-radius: var(--radius); border: 1px solid var(--line); background: #fff; width: 100%;
}
figure a { display: block; }

/* ---------- Home ---------- */
.story { margin: 0 0 48px; }
.story p { font-size: 1.1rem; line-height: 1.7; margin: 0 0 22px; }
.story figure { margin: 0; }
.split { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: center; }
.split p { margin: 0; }
.split.flip figure { order: -1; }
.explore { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin-top: 48px; }
.explore a {
  display: block; padding: 20px 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line); text-decoration: none; color: var(--ink);
  transition: border-color .15s, transform .15s;
}
.explore a:hover { border-color: var(--accent); transform: translateY(-2px); }
.explore strong { display: block; font-family: var(--serif); font-size: 1.15rem; color: var(--accent); }
.explore span { color: var(--muted); font-size: .95rem; }

/* ---------- People ---------- */
.lead-card {
  display: grid; grid-template-columns: 200px 1fr; gap: 28px; align-items: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px;
}
.lead-card img { width: 200px; aspect-ratio: 1; object-fit: cover; border-radius: 10px; }
.lead-card h3 { font-size: 1.5rem; }
.lead-card p { margin: 0 0 .6em; color: var(--muted); }

.people { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 26px 20px; }
.person img {
  width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 12px;
  background: var(--tint); margin-bottom: 12px;
}
.person p { margin: 0; color: var(--muted); font-size: .95rem; line-height: 1.45; }

.alumni { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.alum {
  display: grid; grid-template-columns: 68px 1fr; gap: 14px; align-items: start;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px;
}
.alum img { width: 68px; height: 68px; object-fit: cover; border-radius: 50%; background: var(--tint); }
.alum h3 { font-size: 1.05rem; }
.alum p { margin: 0; font-size: .92rem; line-height: 1.45; color: var(--muted); }
.alum .dates { font-size: .82rem; letter-spacing: .02em; color: var(--muted); opacity: .85; margin-top: 2px; }
.alum .now { color: var(--accent); margin-top: 6px; }

/* ---------- PI ---------- */
.pi { display: grid; grid-template-columns: 300px 1fr; gap: 40px; align-items: start; }
.pi-photo img { border-radius: var(--radius); width: 100%; aspect-ratio: 1; object-fit: cover; }
.pi-role { font-size: 1.15rem; color: var(--muted); margin: -.2em 0 1.2em; }
.links { list-style: none; padding: 0; margin: 20px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.links a {
  display: inline-block; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--surface); text-decoration: none; font-weight: 600; font-size: .92rem;
}
.links a:hover { border-color: var(--accent); }

/* ---------- Publications ---------- */
.years { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; padding: 0; list-style: none; }
.years a {
  display: inline-block; padding: 4px 11px; border-radius: 999px; background: var(--tint);
  text-decoration: none; font-weight: 600; font-size: .9rem;
}
.years a:hover { background: var(--accent); color: #fff; }
.updated { font-size: .9rem; color: var(--muted); margin: 0 0 14px; }
.pub-year { scroll-margin-top: 70px; font-size: 1.9rem; color: var(--accent); margin: 44px 0 14px; }
.pubs { list-style: none; padding: 0; margin: 0; }
.pubs li { padding: 14px 0; border-top: 1px solid var(--line); }
.pubs .t { font-family: var(--serif); font-size: 1.08rem; font-weight: 600; line-height: 1.35; text-decoration: none; color: var(--ink); }
.pubs .t:hover { color: var(--link); text-decoration: underline; }
.pubs .a { margin: 4px 0 0; font-size: .93rem; color: var(--muted); line-height: 1.5; }
.pubs .a b { color: var(--ink); }
.pubs .j { margin: 2px 0 0; font-size: .93rem; }
.pubs .j em { color: var(--accent); font-style: italic; font-weight: 600; }

/* ---------- Tools / cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px;
}
.card h3 { color: var(--accent); }
.card p { margin: 0 0 .7em; color: var(--muted); font-size: .97rem; }
.card a.go { font-weight: 600; word-break: break-word; font-size: .93rem; }

/* ---------- Demos ---------- */
.demos { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 22px; }
.demo { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.demo a { text-decoration: none; color: var(--ink); display: block; }
.demo img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: #000; }
.demo p { margin: 0; padding: 14px 18px; font-weight: 600; }
.demo p strong { display: block; font-family: var(--serif); font-size: 1.12rem; color: var(--accent); }
.demo p span { display: block; font-weight: 400; font-size: .95rem; color: var(--muted); margin-top: 4px; line-height: 1.45; }
.demo:hover { border-color: var(--accent); }

/* ---------- Complexes ---------- */
.toolbar {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  margin: 8px 0 22px; padding: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
}
.toolbar input, .toolbar select {
  font: inherit; font-size: .97rem; padding: 9px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--ink);
}
.toolbar input { flex: 1 1 240px; min-width: 0; }
.toolbar .count { color: var(--muted); font-size: .92rem; }
.cpx-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; }
.cpx[hidden] { display: none; }
.cpx { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.cpx .thumb { display: block; background: #fff; border-bottom: 1px solid var(--line); }
.cpx .thumb img { width: 100%; aspect-ratio: 1; object-fit: contain; padding: 10px; }
.cpx-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.cpx-id {
  align-self: flex-start; font-size: .8rem; font-weight: 700; letter-spacing: .03em;
  padding: 2px 9px; border-radius: 999px; background: var(--tint); text-decoration: none;
}
.cpx h3 { font-size: 1rem; line-height: 1.3; }
.cpx .note { margin: 0; font-size: .85rem; color: var(--muted); }
.cpx .scores { margin: 0; font: 600 .85rem/1.4 ui-monospace, "SF Mono", Menlo, monospace; color: var(--ink); }
.cpx .scores span { color: var(--muted); font-weight: 400; }
.cpx .actions { margin-top: auto; padding-top: 6px; display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
  display: inline-block; font-size: .85rem; font-weight: 600; padding: 6px 12px; border-radius: 8px;
  border: 1px solid var(--line); text-decoration: none; background: #fff;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover { background: var(--accent-deep); color: #fff; }
.footnote { font-size: .9rem; color: var(--muted); margin-top: 22px; }
.empty { display: none; color: var(--muted); }

/* ---------- Find us ---------- */
.map { width: 100%; aspect-ratio: 16 / 9; border: 0; border-radius: var(--radius); background: var(--tint); }
.address { font-size: 1.15rem; margin: 0 0 24px; }
.photo { margin: 0 0 32px; }
.photo img { border: 0; }
.photo figcaption { font-size: .85rem; color: var(--muted); margin-top: 6px; text-align: right; }
.photo figcaption a { display: inline; }

/* ---------- Footer ---------- */
.site-footer { background: var(--footer); color: rgba(255,255,255,.85); padding: 40px 0; font-size: .95rem; }
.site-footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; }
.site-footer strong { color: #fff; font-family: var(--serif); font-size: 1.15rem; display: block; margin-bottom: 4px; }
.site-footer a { color: #fff; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 2px 0; }

/* ---------- Small screens ---------- */
@media (max-width: 760px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .site-header .wrap { padding-top: 30px; padding-bottom: 30px; gap: 14px; }
  .site-header::before { background: rgba(0,0,0,.45); }
  .brand-logo { width: 64px; height: 64px; padding: 6px; }
  .brand-logo img { max-height: 52px; }
  .brand-tag { font-size: .98rem; }
  main { padding: 30px 0 56px; }
  .banner { aspect-ratio: 16 / 9; margin-bottom: 24px; }
  .lead-card, .pi { grid-template-columns: 1fr; }
  .story { margin-bottom: 36px; }
  .story p { font-size: 1rem; }
  .split { grid-template-columns: 1fr; gap: 18px; }
  .split.flip figure { order: 0; }
  .lead-card img { width: 100%; max-width: 260px; }
  .pi-photo { max-width: 280px; }
  .people { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 14px; }
  .alumni, .cards, .demos { grid-template-columns: 1fr; }
  .cpx-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .cpx-body { padding: 12px; }
  .site-footer .wrap { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
  .cpx-grid { grid-template-columns: 1fr; }
}

/* ---------- Home: research themes and latest papers ---------- */
.themes { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-bottom: 8px; }
.themes .card p { font-size: 1rem; }
.see-all { margin: 14px 0 0; font-weight: 600; }
@media (max-width: 760px) { .themes { grid-template-columns: 1fr; } }

/* ---------- Members: interactive group photo ---------- */
.groupshot { position: relative; margin: 0 0 10px; }
.gs-frame { position: relative; }
.gs-frame > img { width: 100%; height: auto; border-radius: var(--radius); background: var(--tint); }
.groupshot svg { position: absolute; inset: 0; width: 100%; height: 100%; border-radius: var(--radius); }
.groupshot .who { fill: transparent; cursor: pointer; outline: none; }
.groupshot .who.on { stroke: #fff; stroke-width: 3; vector-effect: non-scaling-stroke; filter: drop-shadow(0 0 5px rgba(0,0,0,.5)); }
.groupshot .veil { fill: rgba(255,255,255,.62); fill-rule: evenodd; pointer-events: none; opacity: 0; transition: opacity .15s; }
.groupshot.focus .veil { opacity: 1; }
.who-card {
  position: absolute; z-index: 3; width: 270px; pointer-events: none;
  display: flex; gap: 12px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px;
  box-shadow: 0 10px 28px rgba(0,0,0,.18);
}
.who-card[hidden] { display: none; }
.who-card img { width: 64px; height: 64px; flex: none; border-radius: 50%; object-fit: cover; background: var(--tint); }
.who-card strong { display: block; font-family: var(--serif); font-size: 1.08rem; color: var(--ink); line-height: 1.25; }
.who-card span { display: block; font-size: .88rem; color: var(--muted); line-height: 1.35; margin-top: 2px; }
.who-card em { display: block; font-style: normal; font-size: .84rem; color: var(--accent); margin-top: 3px; }
.who-card em:empty, .who-card span:empty { display: none; }
.groupshot-hint { font-size: .9rem; color: var(--muted); margin: 0 0 8px; }
@media (max-width: 760px) {
  .who-card { position: static; width: auto; margin-top: 10px; box-shadow: none; }
}

/* ---------- Photos ---------- */
.gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.shot { margin: 0; }
.shot a { display: block; }
.shot img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: var(--radius); background: var(--tint); transition: transform .15s; }
.shot a:hover img { transform: scale(1.01); }
.shot figcaption { margin-top: 8px; font-weight: 600; color: var(--ink); }
.lightbox { position: fixed; inset: 0; z-index: 50; background: rgba(15, 17, 20, .92); display: flex; align-items: center; justify-content: center; padding: 48px 64px; }
.lightbox[hidden] { display: none; }
.lightbox figure { margin: 0; max-width: 100%; max-height: 100%; display: flex; flex-direction: column; align-items: center; }
.lightbox img { max-width: 100%; max-height: calc(100vh - 140px); width: auto; height: auto; border-radius: 8px; }
.lightbox figcaption { color: #fff; margin-top: 12px; font-weight: 600; }
.lightbox button { position: absolute; background: rgba(255,255,255,.12); color: #fff; border: 0; border-radius: 999px; width: 44px; height: 44px; font-size: 28px; line-height: 1; cursor: pointer; }
.lightbox button:hover { background: rgba(255,255,255,.25); }
.lb-close { top: 14px; right: 14px; }
.lb-prev { left: 12px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 12px; top: 50%; transform: translateY(-50%); }
@media (max-width: 760px) {
  .gallery { grid-template-columns: 1fr; }
  .lightbox { padding: 56px 8px; }
  .lb-prev, .lb-next { top: auto; bottom: 10px; transform: none; }
}
.pubs .x { margin: 3px 0 0; font-size: .88rem; }
.pubs .x a { font-weight: 600; text-decoration: none; }
.pubs .x a:hover { text-decoration: underline; }

/* ---------- Funding ---------- */
.grants { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.grant { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.grant h3 { color: var(--accent); margin-bottom: 8px; }
.grant ul { list-style: none; margin: 0; padding: 0; }
.grant li { margin: 0 0 6px; font-size: .97rem; color: var(--muted); }
.grant li b { color: var(--ink); font-weight: 600; }
.todo { background: #fff3bf; color: #6b5300; border-radius: 4px; padding: 0 4px; }
@media (max-width: 760px) { .grants { grid-template-columns: 1fr; } }
.themes .card { display: flex; flex-direction: column; }
.themes .card a.go { display: block; margin-top: 4px; }
.themes .card a.go:first-of-type { margin-top: auto; padding-top: 6px; }
[id] { scroll-margin-top: 70px; }