:root {
  --bg: #FAFBFD;
  --surface: #FFFFFF;
  --tint: #EEF3FB;
  --ink: #0C1A33;
  --muted: #56637A;
  --line: #DCE3EE;
  --guide: #9FB0CB;
  --accent: #0A3D91;
  --accent-2: #3F6FC4;
  --accent-soft: #D5E2F7;
  --on-accent: #FFFFFF;
  --on-cat: #FFFFFF;
  --band: #0A3D91;
  --on-band: #FFFFFF;
  --on-band-muted: #C9D8F4;
  --display: 'Newsreader', 'Iowan Old Style', Georgia, serif;
  --sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0A111F;
    --surface: #0F182B;
    --tint: #101C33;
    --ink: #E7EDF8;
    --muted: #9AA8C2;
    --line: #23304A;
    --guide: #3A4C70;
    --accent: #7EA6FF;
    --accent-2: #5B8DEF;
    --accent-soft: #1B2C4D;
    --on-accent: #0A111F;
    --on-cat: #0A111F;
    --band: #12306B;
    --on-band: #FFFFFF;
    --on-band-muted: #B5C6E8;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0A111F;
  --surface: #0F182B;
  --tint: #101C33;
  --ink: #E7EDF8;
  --muted: #9AA8C2;
  --line: #23304A;
  --guide: #3A4C70;
  --accent: #7EA6FF;
  --accent-2: #5B8DEF;
  --accent-soft: #1B2C4D;
  --on-accent: #0A111F;
  --on-cat: #0A111F;
  --band: #12306B;
  --on-band: #FFFFFF;
  --on-band-muted: #B5C6E8;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p, ul, dl, dd, figure { margin: 0; }
a { color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.wrap { width: 100%; max-width: 1120px; margin-inline: auto; padding-inline: clamp(16px, 4vw, 32px); }
.mono { font-family: var(--mono); }
.tag {
  font-family: var(--mono); font-weight: 500; font-size: .72rem;
  letter-spacing: .1em; text-transform: uppercase; color: var(--accent);
}

/* ---------- Header ---------- */
.site-head {
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 24px; padding-block: 12px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-family: var(--mono); font-weight: 500; letter-spacing: .06em; font-size: .95rem; }
.brand span small { color: var(--muted); font-weight: 400; letter-spacing: .04em; }
.brand svg { display: block; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 22px; font-size: .9rem; }
.nav a { color: var(--muted); text-decoration: none; padding-block: 4px; border-bottom: 1px solid transparent; transition: color .15s, border-color .15s; }
.nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }
@media (min-width: 640px) {
  .site-head { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
}

/* ---------- Hero ---------- */
.hero { padding-block: clamp(40px, 7vw, 88px) clamp(48px, 7vw, 88px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); gap: clamp(32px, 6vw, 72px); align-items: center; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }
.hero h1 {
  font-family: var(--display); font-weight: 400; letter-spacing: -.02em; line-height: 1.08;
  font-size: clamp(2.3rem, 5.2vw, 3.7rem); text-wrap: balance; margin-top: 18px;
}
.hero .lede { margin-top: 22px; max-width: 34em; font-size: 1.075rem; color: var(--muted); }
.cta { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; margin-top: 30px; }
.btn {
  display: inline-block; background: var(--accent); color: var(--on-accent); text-decoration: none;
  font-weight: 500; font-size: .95rem; padding: 11px 20px; border-radius: 4px; border: 1px solid var(--accent);
  transition: opacity .15s;
}
.btn:hover { opacity: .9; text-decoration: none; }
.btn-ghost { background: transparent; color: var(--accent); }
.btn-ghost:hover { background: var(--accent-soft); opacity: 1; }
.facts { display: grid; gap: 10px; margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); font-size: .9rem; }
.facts div { display: grid; grid-template-columns: 7.5rem minmax(0, 1fr); gap: 12px; }
.facts dt { font-family: var(--mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding-top: .2em; }
.facts dd { color: var(--ink); }

.figure { background: var(--tint); border: 1px solid var(--line); border-radius: 6px; padding: clamp(14px, 3vw, 26px); }
.figure svg { display: block; width: 100%; height: auto; max-width: 480px; margin-inline: auto; }
.figure figcaption { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); font-size: .8rem; line-height: 1.5; color: var(--muted); }
.edl .el { fill: var(--accent); }
.edl .band { fill: url(#edl-diffuse); }
.edl .s0 { stop-color: var(--accent); stop-opacity: .17; }
.edl .s1 { stop-color: var(--accent); stop-opacity: 0; }
.edl .guide { stroke: var(--guide); stroke-width: 1; stroke-dasharray: 3 4; fill: none; }
.edl .axis { stroke: var(--muted); stroke-width: 1; fill: none; }
.edl .curve { stroke: var(--accent); stroke-width: 2.5; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.edl .ring { stroke: var(--accent-2); stroke-width: 1.2; stroke-dasharray: 2 3; fill: none; opacity: .75; }
.edl .cat { fill: var(--accent-2); }
.edl .ani { fill: var(--surface); stroke: var(--muted); stroke-width: 1.4; }
.edl .wo { fill: var(--accent); }
.edl .wh { fill: var(--accent-2); }
.edl text { font-family: var(--mono); fill: var(--muted); font-size: 13px; }
.edl .lbl { letter-spacing: .08em; }
.edl .on { fill: #FFFFFF; font-weight: 500; letter-spacing: .14em; font-size: 12px; }
.edl .sign { fill: var(--on-cat); font-family: var(--sans); font-size: 14px; font-weight: 600; text-anchor: middle; dominant-baseline: central; }
.edl .neg { fill: #FFFFFF; font-family: var(--sans); font-size: 18px; text-anchor: middle; dominant-baseline: central; }
.edl .k { fill: var(--ink); }
.edl .hd { font-size: 12px; letter-spacing: .06em; fill: var(--muted); }
.edl .sm { font-size: 12px; }
.edl .acc { fill: var(--accent); }
.edl .c { text-anchor: middle; }
.edl .mid { dominant-baseline: central; }
.edl .ln { stroke: var(--muted); stroke-width: 1.2; fill: none; }
.edl .ln-a { stroke: var(--accent); stroke-width: 1.4; fill: none; }
.edl .ah { fill: var(--muted); }
.edl .aha { fill: var(--accent); }
.edl .box { fill: var(--surface); stroke: var(--guide); stroke-width: 1.2; }
.edl .bub { fill: none; stroke: var(--accent-2); stroke-width: 1.2; }
.edl .mem { fill: var(--accent-soft); }
.edl .seg-a { fill: var(--accent); }
.edl .seg-b { fill: var(--accent-2); }
.edl .seg-c { fill: var(--surface); stroke: var(--muted); stroke-width: 1.2; stroke-dasharray: 3 3; }
.edl .onfill { fill: var(--on-cat); }
.edl .asign { fill: var(--muted); font-family: var(--sans); font-size: 13px; font-weight: 600; text-anchor: middle; dominant-baseline: central; }

/* ---------- Sections ---------- */
.sec { padding-block: clamp(48px, 7vw, 88px); border-top: 1px solid var(--line); }
.sec-grid { display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); gap: clamp(24px, 5vw, 72px); }
@media (max-width: 860px) { .sec-grid { grid-template-columns: 1fr; } }
@media (min-width: 861px) { .sec-head { position: sticky; top: 92px; align-self: start; } }
.sec-head h2 { font-family: var(--display); font-weight: 400; font-size: clamp(1.75rem, 3.4vw, 2.3rem); letter-spacing: -.01em; line-height: 1.15; text-wrap: balance; }
.sec-head p { margin-top: 12px; color: var(--muted); font-size: .95rem; max-width: 28em; }
section[id] { scroll-margin-top: 72px; }

/* Research */
.theme { padding-block: 30px; border-top: 1px solid var(--line); }
.theme:first-child { border-top: 0; padding-top: 0; }
.theme h3 { font-family: var(--display); font-weight: 400; font-size: 1.55rem; line-height: 1.25; margin-top: 8px; text-wrap: balance; }
.theme { container-type: inline-size; }
.theme-in { display: grid; grid-template-columns: minmax(0, 1fr); gap: 26px 40px; align-items: start; }
@container (min-width: 660px) { .theme-in { grid-template-columns: minmax(0, 1fr) 400px; } }
.theme-txt > p:not(.tag) { margin-top: 10px; max-width: 40em; }
.figure.sch { padding: clamp(10px, 2.6vw, 16px); }
.figure.sch svg { max-width: 440px; }
.figure.sch figcaption { margin-top: 10px; padding-top: 10px; }
.theme ul { list-style: none; padding: 0; margin-top: 16px; display: grid; gap: 8px; max-width: 42em; }
.theme li { position: relative; padding-left: 20px; color: var(--muted); }
.theme li::before { content: ""; position: absolute; left: 0; top: .82em; width: 10px; height: 1px; background: var(--accent); }
.scope { margin-top: 12px; padding-top: 28px; border-top: 1px solid var(--line); display: grid; gap: 18px; }
.scope-row { display: grid; grid-template-columns: 7.5rem minmax(0, 1fr); gap: 8px 16px; align-items: baseline; }
@media (max-width: 560px) { .scope-row { grid-template-columns: 1fr; } }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font-size: .85rem; padding: 4px 11px; border: 1px solid var(--line); border-radius: 3px; background: var(--surface); color: var(--ink); }

/* PI */
.pi-top { display: grid; grid-template-columns: minmax(0, 1fr) 190px; gap: 28px clamp(24px, 4vw, 48px); align-items: start; }
.pi-photo { width: 190px; max-width: 100%; height: auto; aspect-ratio: 3 / 4; object-position: 50% 22%; border-radius: 4px; object-fit: cover; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); font: 500 2rem var(--mono); letter-spacing: .06em; }
@media (max-width: 720px) { .pi-top { grid-template-columns: 1fr; } .pi-photo { order: -1; width: 150px; } }
.pi-name { font-family: var(--display); font-weight: 400; font-size: clamp(1.8rem, 3.6vw, 2.4rem); letter-spacing: -.01em; line-height: 1.15; }
.pi-role { margin-top: 6px; color: var(--muted); }
.pi-bio { margin-top: 18px; max-width: 40em; }
.pi-links { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 18px; font-size: .95rem; }
.pi-cols { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 32px clamp(24px, 4vw, 56px); margin-top: 40px; padding-top: 30px; border-top: 1px solid var(--line); }
@media (max-width: 720px) { .pi-cols { grid-template-columns: 1fr; } }
.pi-cols h3, .sub-h { font-family: var(--mono); font-weight: 500; font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.tl { display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: 12px 18px; }
@media (max-width: 480px) { .tl { grid-template-columns: 1fr; gap: 2px; } .tl dd { margin-bottom: 12px; } }
.tl dt { font-family: var(--mono); font-size: .8rem; color: var(--accent); padding-top: .18em; font-variant-numeric: tabular-nums; }
.tl dd { line-height: 1.45; }
.tl dd small { display: block; color: var(--muted); font-size: .85rem; }
.edu { display: grid; gap: 22px; align-content: start; }
.edu p { line-height: 1.45; }
.edu small { display: block; color: var(--muted); font-size: .85rem; }

/* Publications */
.sub-h { margin-bottom: 4px; }
.hl { display: grid; grid-template-columns: 12rem minmax(0, 1fr); gap: 4px 24px; padding-block: 18px; border-top: 1px solid var(--line); align-items: baseline; }
.hl:first-of-type { border-top: 0; }
.hl .ref { font-family: var(--mono); font-size: .8rem; color: var(--accent); }
.hl .ttl { font-family: var(--display); font-size: 1.28rem; line-height: 1.3; text-wrap: pretty; }
.hl .au { margin-top: 6px; color: var(--muted); font-size: .88rem; line-height: 1.5; }
.au strong { color: var(--ink); font-weight: 600; }
@media (max-width: 640px) { .hl { grid-template-columns: 1fr; } }
.recent-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 14px 24px; margin-top: 44px; padding-top: 30px; border-top: 1px solid var(--line); }
.filter { display: flex; flex-wrap: wrap; gap: 6px; }
.fbtn {
  font: 500 .78rem var(--mono); letter-spacing: .04em; color: var(--muted); background: transparent;
  border: 1px solid var(--line); border-radius: 3px; padding: 6px 11px; cursor: pointer; transition: background .15s, color .15s, border-color .15s;
}
.fbtn:hover { color: var(--ink); border-color: var(--guide); }
.fbtn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.recent-head { justify-content: space-between; align-items: baseline; }
.count { font-size: .78rem; color: var(--muted); }
.recent-head + .filter { margin-top: 14px; }
.search { margin-top: 14px; }
.q { width: 100%; max-width: 24rem; font: inherit; font-size: .92rem; padding: 9px 12px; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 4px; }
.q::placeholder { color: var(--muted); }
.q:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
#pub-list { margin-top: 18px; }
.pub .no { display: block; color: var(--accent); }
.pub .note { margin-top: 5px; font-size: .82rem; color: var(--accent); }
.eqn { color: var(--muted); font-size: .8rem; white-space: nowrap; }
.none { padding-block: 24px; color: var(--muted); }
.pub { display: grid; grid-template-columns: 12rem minmax(0, 1fr); gap: 4px 24px; padding-block: 15px; border-top: 1px solid var(--line); }
.pub .ref { font-family: var(--mono); font-size: .76rem; line-height: 1.55; color: var(--muted); font-variant-numeric: tabular-nums; }
.pub .ttl { font-weight: 500; line-height: 1.42; text-wrap: pretty; }
.pub .au { margin-top: 3px; color: var(--muted); font-size: .88rem; }
.corr { display: inline-block; margin-left: 8px; font: 500 .64rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); border: 1px solid var(--accent-soft); background: var(--accent-soft); border-radius: 3px; padding: 1px 6px; vertical-align: 1px; white-space: nowrap; }
@media (max-width: 640px) { .pub { grid-template-columns: 1fr; } }
.more { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); font-size: .95rem; }

/* People */
.grp { display: grid; grid-template-columns: 9rem minmax(0, 1fr); gap: 14px 24px; padding-block: 24px; border-top: 1px solid var(--line); }
.grp:first-child { border-top: 0; padding-top: 0; }
@media (max-width: 640px) { .grp { grid-template-columns: 1fr; } }
.grp h3 { font-family: var(--mono); font-weight: 500; font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); padding-top: .3em; }
.roster { display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 24px 28px; list-style: none; padding: 0; }
.person { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 14px; align-items: start; }
.ph {
  display: grid; place-items: center; width: 72px; height: auto; aspect-ratio: 4 / 5; border-radius: 4px; object-fit: cover; object-position: 50% 15%;
  background: var(--accent-soft); color: var(--accent); font: 500 .85rem var(--mono); letter-spacing: .04em;
}
.person .n { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 8px; font-weight: 500; }
.person .role { margin-left: 0; font: 500 .64rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); background: var(--accent-soft); border-radius: 3px; padding: 1px 6px; vertical-align: 1px; white-space: nowrap; }
.person .em { margin-top: 4px; font-family: var(--mono); font-size: .76rem; overflow-wrap: anywhere; }
.person .em a { color: var(--accent); }
.person .bg { color: var(--muted); font-size: .86rem; line-height: 1.45; margin-top: 2px; }
.alumni { display: grid; gap: 0; list-style: none; padding: 0; }
.alumni li { display: grid; grid-template-columns: 4.5rem minmax(0, 12rem) minmax(0, 1fr); gap: 4px 16px; padding-block: 9px; border-top: 1px solid var(--line); font-size: .93rem; }
.alumni li:first-child { border-top: 0; padding-top: 0; }
.alumni .y { font-family: var(--mono); font-size: .8rem; color: var(--accent); padding-top: .12em; }
.alumni .d { color: var(--muted); }
@media (max-width: 560px) { .alumni li { grid-template-columns: 4rem 1fr; } .alumni .d { grid-column: 2; } }

/* Album */
.alb-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 24px; }
.alb-list { margin-top: 18px; }
.alb-row { display: grid; grid-template-columns: 9.5rem minmax(0, 1fr); gap: 4px 24px; padding-block: 12px; border-top: 1px solid var(--line); }
.alb-row .cat { font: 500 .72rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); padding-top: .25em; }
.alb-row .cap { line-height: 1.45; }
@media (max-width: 560px) { .alb-row { grid-template-columns: 1fr; } }
.alb-grid { margin-top: 18px; display: grid; grid-template-columns: repeat(auto-fill, minmax(13.5rem, 1fr)); gap: 22px 18px; }
.alb-item { margin: 0; }
.alb-ph { position: relative; display: grid; place-items: center; width: 100%; aspect-ratio: 4 / 3; border: 1px dashed var(--guide); border-radius: 4px; background: var(--tint); color: var(--guide); }
.alb-ph svg { display: block; }
.alb-ph .no { position: absolute; left: 10px; top: 8px; font: 500 .7rem var(--mono); letter-spacing: .06em; color: var(--muted); }
.alb-item img { cursor: zoom-in; object-position: 50% 35%; }
.dlg { max-width: min(92vw, 980px); padding: 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--ink); }
.dlg::backdrop { background: rgba(6, 12, 24, .72); }
.dlg img { display: block; max-width: 100%; max-height: 78vh; margin-inline: auto; border-radius: 3px; }
.dlg p { margin-top: 10px; font-size: .9rem; color: var(--muted); }
.dlg-x { position: absolute; right: 8px; top: 6px; z-index: 1; width: 32px; height: 32px; border: 0; border-radius: 4px; background: var(--surface); color: var(--ink); font-size: 1.4rem; line-height: 1; cursor: pointer; }
.alb-item img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 4px; background: var(--tint); }
.alb-item figcaption { margin-top: 8px; font-size: .86rem; line-height: 1.4; color: var(--muted); }
.alb-item .cat { display: block; margin-bottom: 2px; font: 500 .66rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }

/* Contact */
.contact { background: var(--band); color: var(--on-band); padding-block: clamp(52px, 7vw, 88px); }
.contact .sec-grid { align-items: start; }
.contact h2 { font-family: var(--display); font-weight: 400; font-size: clamp(1.9rem, 3.8vw, 2.6rem); letter-spacing: -.01em; line-height: 1.12; text-wrap: balance; }
.contact .join { margin-top: 16px; max-width: 30em; color: var(--on-band-muted); }
.contact a { color: var(--on-band); }
.mail { font-family: var(--display); font-size: clamp(1.4rem, 3vw, 1.9rem); text-decoration-thickness: 1px; }
.addr { display: grid; gap: 22px; margin-top: 4px; }
.addr dt { font-family: var(--mono); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--on-band-muted); margin-bottom: 4px; }
.addr dd { line-height: 1.5; }
.foot { padding-block: 22px; font-size: .8rem; color: var(--muted); }
.foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 24px; }

.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }