/* =====================================================================
   LIVIA — modern static site
   Pure CSS design system. Dark-first feel, system-adaptive, toggle.
   ===================================================================== */

/* ---------- Tokens ---------- */
:root {
  --brand-1: #b3002a;   /* deep crimson */
  --brand-2: #e40032;   /* ÉTS red      */
  --brand-3: #ff5b4d;   /* coral        */
  --brand-pink: #ff3b6b;
  --grad: linear-gradient(110deg, #b3002a 0%, #e40032 48%, #ff5b4d 100%);
  --grad-soft: linear-gradient(110deg, rgba(228,0,50,.16), rgba(255,91,77,.12));

  /* Light (base) */
  --bg: #ffffff;
  --bg-2: #f5f6fb;
  --surface: #ffffff;
  --surface-2: #f7f8fc;
  --glass: rgba(255,255,255,.72);
  --border: #e7e9f2;
  --border-2: #eef0f6;
  --heading: #0a0d18;
  --text: #434b60;
  --muted: #717a90;
  --shadow-sm: 0 1px 2px rgba(16,24,40,.05), 0 1px 3px rgba(16,24,40,.06);
  --shadow: 0 18px 40px -18px rgba(20,24,60,.22);
  --shadow-lg: 0 40px 80px -28px rgba(40,30,110,.30);
  --logo-filter: none;
  --dot: rgba(10,13,24,.5);

  --maxw: 1180px;
  --read-col: 860px;   /* consistent reading-column width for body text */
  --r: 18px;
  --r-sm: 12px;
  --r-lg: 26px;
  --f-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --f-display: "Sora", var(--f-sans);
  --f-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { color-scheme: dark; }
}
:root[data-theme="dark"] { color-scheme: dark; }

/* Dark token values (system dark OR manual dark) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #06070e;
    --bg-2: #0a0c16;
    --surface: rgba(255,255,255,.035);
    --surface-2: rgba(255,255,255,.05);
    --glass: rgba(8,9,16,.66);
    --border: rgba(255,255,255,.09);
    --border-2: rgba(255,255,255,.06);
    --heading: #f4f6fc;
    --text: #b9c0d2;
    --muted: #818aa1;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
    --shadow: 0 22px 48px -20px rgba(0,0,0,.7);
    --shadow-lg: 0 44px 90px -30px rgba(0,0,0,.85);
    --logo-filter: brightness(0) invert(1);
    --dot: rgba(180,190,220,.45);
  }
}
:root[data-theme="dark"] {
  --bg: #06070e;
  --bg-2: #0a0c16;
  --surface: rgba(255,255,255,.035);
  --surface-2: rgba(255,255,255,.05);
  --glass: rgba(8,9,16,.66);
  --border: rgba(255,255,255,.09);
  --border-2: rgba(255,255,255,.06);
  --heading: #f4f6fc;
  --text: #b9c0d2;
  --muted: #818aa1;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow: 0 22px 48px -20px rgba(0,0,0,.7);
  --shadow-lg: 0 44px 90px -30px rgba(0,0,0,.85);
  --logo-filter: brightness(0) invert(1);
  --dot: rgba(180,190,220,.45);
}

/* ---------- Reset / base ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body {
  font-family: var(--f-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 17px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color .3s ease, color .3s ease;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand-2); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--brand-3); }
h1,h2,h3,h4,h5 { font-family: var(--f-display); color: var(--heading); line-height: 1.12; font-weight: 700; letter-spacing: -.025em; }
strong { color: var(--heading); font-weight: 600; }
::selection { background: rgba(228,0,50,.28); color: inherit; }
:focus-visible { outline: 2px solid var(--brand-2); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--f-mono); }
.grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- Nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: 72px;
  display: flex; align-items: center;
  background: var(--glass); backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.nav-brand img { height: 32px; filter: var(--logo-filter); transition: transform .2s ease; }
.nav-brand:hover img { transform: translateY(-1px); }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
  font-family: var(--f-display); font-weight: 600; font-size: .95rem; color: var(--heading);
  padding: 9px 14px; border-radius: 10px; position: relative; transition: color .18s ease, background .18s ease;
}
.nav-links a:hover { color: var(--brand-2); background: var(--surface-2); }
.nav-links a.active { color: var(--brand-2); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  width: 40px; height: 40px; border-radius: 11px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--heading); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; font-size: 1.05rem;
  transition: transform .16s ease, border-color .18s ease, color .18s ease;
}
.icon-btn:hover { transform: translateY(-2px); border-color: rgba(228,0,50,.45); color: var(--brand-2); }
.theme-toggle::before { content: "\263E"; }
:root[data-theme="dark"] .theme-toggle::before { content: "\2600"; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .theme-toggle::before { content: "\2600"; } }
.nav-burger { display: none; }

/* Compact challenge chip in nav */
.nav-links a.nav-chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--f-mono); font-size: .72rem; letter-spacing: .04em; text-transform: uppercase;
  color: #fff; background: var(--grad); padding: 7px 13px; border-radius: 999px;
  box-shadow: 0 8px 18px -10px rgba(228,0,50,.7);
}
.nav-links a.nav-chip:hover { color: #fff; background: var(--grad); transform: translateY(-1px); }
.nav-links a.nav-chip::after { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font-family: var(--f-display); font-weight: 600; font-size: .98rem;
  padding: 12px 24px; border-radius: 999px; border: 1px solid transparent;
  transition: transform .16s ease, box-shadow .22s ease, border-color .2s ease, background .2s ease;
}
.btn-primary { color: #fff; background: var(--grad); box-shadow: 0 14px 30px -12px rgba(228,0,50,.6); }
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 20px 40px -14px rgba(228,0,50,.7); }
.btn-ghost { color: var(--heading); background: var(--surface); border-color: var(--border); box-shadow: var(--shadow-sm); }
.btn-ghost:hover { color: var(--brand-2); border-color: rgba(228,0,50,.45); transform: translateY(-2px); }

/* ---------- Sections ---------- */
section { position: relative; }
.section { padding: 90px 0; }
.section.tight { padding: 56px 0; }
.section.alt { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.head { max-width: 720px; margin-bottom: 46px; }
.head.center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker {
  font-family: var(--f-mono); font-size: .76rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--brand-2); margin-bottom: 14px; display: inline-flex; align-items: center; gap: 8px;
}
.kicker::before { content: ""; width: 22px; height: 1.5px; background: var(--grad); display: inline-block; }
.head h2 { font-size: clamp(1.8rem, 3.4vw, 2.5rem); margin-bottom: 12px; }
.head p { color: var(--muted); font-size: 1.05rem; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center; padding: 110px 0 70px; overflow: hidden; }
#hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(900px 500px at 15% 0%, rgba(228,0,50,.18), transparent 60%),
    radial-gradient(800px 520px at 100% 10%, rgba(255,91,77,.12), transparent 55%);
}
.hero .wrap { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 9px; font-family: var(--f-mono); font-size: .78rem;
  letter-spacing: .06em; text-transform: uppercase; color: var(--brand-2);
  background: var(--surface); border: 1px solid var(--border); padding: 8px 15px; border-radius: 999px;
  margin-bottom: 26px; box-shadow: var(--shadow-sm);
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: #ff5b4d; box-shadow: 0 0 0 0 rgba(255,91,77,.6); animation: pulse 2.4s infinite; }
@keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(255,91,77,.55)} 70%{box-shadow:0 0 0 10px rgba(255,91,77,0)} 100%{box-shadow:0 0 0 0 rgba(255,91,77,0)} }
.hero h1 { font-size: clamp(2.6rem, 6.4vw, 4.6rem); line-height: 1.02; letter-spacing: -.035em; max-width: 16ch; margin-bottom: 22px; }
.hero .lead { font-size: clamp(1.05rem, 1.7vw, 1.3rem); color: var(--muted); max-width: 56ch; margin-bottom: 32px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }

/* Stat band */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 60px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 24px; box-shadow: var(--shadow-sm); }
.stat .n { font-family: var(--f-display); font-weight: 800; font-size: clamp(1.7rem, 3vw, 2.2rem); letter-spacing: -.03em; line-height: 1; }
.stat .n sup { font-size: .5em; }
.stat .l { color: var(--muted); font-size: .9rem; margin-top: 8px; }

/* ---------- Card grid ---------- */
.grid { display: grid; gap: 22px; }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  padding: 28px; box-shadow: var(--shadow-sm); position: relative; overflow: hidden;
  transition: transform .22s ease, box-shadow .25s ease, border-color .22s ease;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: var(--grad); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity .25s ease;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.card:hover::before { opacity: .5; }
.card .ic {
  width: 48px; height: 48px; border-radius: 13px; display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 18px; color: #fff; background: var(--grad); box-shadow: 0 8px 18px -8px rgba(228,0,50,.6);
  transition: transform .25s cubic-bezier(.2,.7,.2,1);
}
.card:hover .ic { transform: scale(1.1) rotate(-4deg); }
.card h4 { font-size: 1.16rem; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: .97rem; }
.card .tag { font-family: var(--f-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--brand-2); margin-bottom: 6px; }

/* ---------- Pills / marquee ---------- */
.pills { display: flex; flex-wrap: wrap; gap: 10px; }
.pill {
  font-weight: 600; font-size: .9rem; padding: 9px 16px; border-radius: 999px;
  background: var(--surface); color: var(--heading); border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  display: inline-flex; align-items: center; gap: 8px;
}
.pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--grad); }

.marquee { overflow: hidden; -webkit-mask: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: flex; gap: 60px; width: max-content; animation: scroll 32s linear infinite; align-items: center; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes scroll { to { transform: translateX(-50%); } }
.marquee img { height: 44px; width: auto; object-fit: contain; opacity: .62; filter: grayscale(100%); transition: opacity .2s, filter .2s; }
.marquee img:hover { opacity: 1; filter: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .marquee img { background: #fff; padding: 8px 12px; border-radius: 9px; filter: none; opacity: .8; } }
:root[data-theme="dark"] .marquee img { background: #fff; padding: 8px 12px; border-radius: 9px; filter: none; opacity: .8; }

/* ---------- News ---------- */
.news { display: grid; gap: 14px; }
.news-item {
  display: flex; gap: 20px; align-items: flex-start; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 22px 24px; box-shadow: var(--shadow-sm); transition: transform .18s ease, box-shadow .2s ease;
}
.news-item:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.news-item .date { flex: 0 0 120px; font-family: var(--f-mono); font-size: .78rem; color: var(--brand-2); letter-spacing: .03em; padding-top: 3px; }
.news-item p { font-size: .98rem; margin: 0; }

/* ---------- Team ---------- */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.member { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .22s ease, box-shadow .25s ease, border-color .22s ease; }
.member:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: rgba(228,0,50,.3); }
.member .ph { aspect-ratio: 1/1; overflow: hidden; background: var(--bg-2); border-bottom: 1px solid var(--border); }
.member .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; filter: grayscale(18%); }
.member:hover .ph img { transform: scale(1.06); filter: none; }
.member .b { padding: 16px 18px 20px; }
.member .b h4 { font-size: 1.04rem; margin-bottom: 3px; }
.member .role { color: var(--brand-2); font-weight: 600; font-size: .82rem; display: block; margin-bottom: 9px; }
.member .b ul { list-style: none; }
.member .b li { font-size: .82rem; color: var(--muted); padding-left: 14px; position: relative; margin-bottom: 2px; }
.member .b li::before { content: ""; position: absolute; left: 0; top: 9px; width: 5px; height: 5px; border-radius: 50%; background: var(--grad); }

.roster { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.roster-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 14px 16px; box-shadow: var(--shadow-sm); transition: transform .16s ease, border-color .18s ease; }
.roster-item:hover { transform: translateY(-2px); border-color: rgba(228,0,50,.35); }
.roster-item .rn { font-weight: 600; color: var(--heading); font-size: .95rem; }
.roster-item .rr { font-size: .8rem; color: var(--muted); }

/* People grid (students / alumni with photos) */
.people { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.person { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.person:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(228,0,50,.3); }
.person .av { aspect-ratio: 1/1; overflow: hidden; background: var(--bg-2); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: center; }
.person .av img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(12%); transition: transform .4s ease, filter .3s ease; }
.person:hover .av img { transform: scale(1.05); filter: none; }
.person .av.ph { background: var(--surface-2); }
.person .av .ini { font-family: var(--f-display); font-weight: 700; font-size: 1.6rem; letter-spacing: .02em; color: var(--muted); }
.person .body { padding: 12px 12px 14px; text-align: center; }
.person .pn { font-weight: 600; font-size: .9rem; color: var(--heading); line-height: 1.25; }
.person .pr { font-size: .76rem; color: var(--muted); margin-top: 3px; }
@media (max-width: 1024px) { .people { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 720px) { .people { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 460px) { .people { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Page hero (interior pages) ---------- */
.page-hero { padding: 130px 0 50px; position: relative; overflow: hidden; border-bottom: 1px solid var(--border); }
.page-hero::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(800px 380px at 0% -10%, rgba(228,0,50,.14), transparent 60%), radial-gradient(700px 380px at 100% 0%, rgba(255,91,77,.1), transparent 55%);
}
.page-hero .wrap { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin-bottom: 14px; }
.page-hero p { color: var(--muted); font-size: 1.08rem; max-width: 62ch; }

/* ---------- Datasets ---------- */
.ds-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.ds-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; transition: transform .22s ease, box-shadow .26s ease, border-color .22s ease; }
.ds-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(228,0,50,.3); }
.ds-thumb { aspect-ratio: 16/9; overflow: hidden; background: #06070e; border-bottom: 1px solid var(--border); display: block; }
.ds-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.ds-card:hover .ds-thumb img { transform: scale(1.05); }
.ds-b { padding: 28px; display: flex; flex-direction: column; flex: 1; }
.venue { align-self: flex-start; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .05em; text-transform: uppercase; color: #fff; background: var(--grad); padding: 6px 13px; border-radius: 999px; margin-bottom: 14px; }
.ds-b h3 { font-size: 1.35rem; margin-bottom: 10px; }
.ds-b > p { color: var(--muted); font-size: .98rem; }
.ds-feat { font-size: .9rem; color: var(--text); background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 13px 15px; margin: 8px 0 20px; }
.ds-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; }
.ds-links a { font-weight: 600; font-size: .9rem; padding: 9px 16px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); color: var(--heading); transition: all .18s ease; }
.ds-links a.pri { background: var(--grad); color: #fff; border-color: transparent; }
.ds-links a:hover { transform: translateY(-2px); border-color: rgba(228,0,50,.45); }

/* Dataset detail article */
.article { max-width: calc(var(--read-col) + 48px); margin: 0 auto; padding: 56px 24px 30px; }
.article > section { margin-bottom: 18px; }
.article h2 { font-size: 1.7rem; margin: 48px 0 16px; padding-top: 30px; border-top: 1px solid var(--border); }
.article h2:first-child { border: 0; padding: 0; margin-top: 0; }
.article h3 { font-size: 1.22rem; margin: 30px 0 12px; color: var(--brand-2); }
.article p { margin-bottom: 1.1em; color: var(--text); }
.article ul { margin: 0 0 1.2em 1.2em; }
.article li { margin-bottom: 6px; }
.article .fig { margin: 26px 0; }
.article .fig img { width: 100%; border-radius: var(--r-sm); border: 1px solid var(--border); box-shadow: var(--shadow); background: var(--surface); }
.article .fig figcaption { font-size: .85rem; color: var(--muted); text-align: center; margin-top: 10px; }
.article .authors { color: var(--text); font-size: 1.02rem; }
.article .affil { color: var(--muted); font-size: .9rem; margin-top: 8px; }
.article .badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0; }
.article .badges img { height: 26px; border: 0; box-shadow: none; border-radius: 5px; background: none; }
.article pre { background: #0a0c16; color: #dfe4f0; border: 1px solid var(--border); border-radius: var(--r-sm); padding: 18px 20px; overflow-x: auto; font-size: .84rem; font-family: var(--f-mono); margin-bottom: 1.2em; }
.article code { font-family: var(--f-mono); font-size: .88em; color: var(--brand-3); background: var(--surface-2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; }
.article pre code { background: none; border: 0; padding: 0; color: inherit; }

/* metric tiles inside articles */
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 26px 0; }
.metric { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 18px; text-align: center; box-shadow: var(--shadow-sm); }
.metric .n { font-family: var(--f-display); font-weight: 800; font-size: 1.5rem; }
.metric .l { font-size: .8rem; color: var(--muted); margin-top: 4px; }

/* Slim challenge banner */
.challenge-banner {
  display: flex; align-items: center; gap: 18px; margin: 30px 0;
  padding: 16px 20px; border-radius: var(--r);
  background: var(--grad-soft); border: 1px solid rgba(228,0,50,.32);
  box-shadow: var(--shadow-sm); color: var(--heading);
  transition: transform .18s ease, box-shadow .22s ease, border-color .2s ease;
}
.challenge-banner:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: rgba(228,0,50,.55); color: var(--heading); }
.challenge-banner .cb-tag {
  flex: 0 0 auto; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .05em;
  text-transform: uppercase; color: #fff; background: var(--grad); padding: 7px 13px; border-radius: 999px;
}
.challenge-banner .cb-body { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.challenge-banner .cb-body strong { font-family: var(--f-display); font-size: 1.02rem; color: var(--heading); }
.challenge-banner .cb-sub { font-size: .86rem; color: var(--muted); }
.challenge-banner .cb-arrow { flex: 0 0 auto; font-family: var(--f-display); font-weight: 600; font-size: .92rem; color: var(--brand-2); white-space: nowrap; }
@media (max-width: 620px) {
  .challenge-banner { flex-wrap: wrap; gap: 10px; }
  .challenge-banner .cb-arrow { flex-basis: 100%; }
}

/* Challenge callout */
.callout { border: 1px solid rgba(228,0,50,.3); background: var(--grad-soft); border-radius: var(--r-lg); padding: 32px; margin: 36px 0; box-shadow: var(--shadow-sm); }
.callout .ctag { display: inline-flex; align-items: center; gap: 8px; font-family: var(--f-mono); font-size: .73rem; letter-spacing: .06em; text-transform: uppercase; color: #fff; background: var(--grad); padding: 6px 14px; border-radius: 999px; margin-bottom: 16px; }
.callout h3 { color: var(--heading); font-size: 1.5rem; margin-bottom: 12px; }
.callout p { color: var(--text); }
.timeline { list-style: none; margin: 18px 0 0; }
.timeline li { display: flex; gap: 16px; align-items: baseline; padding: 12px 0; border-bottom: 1px dashed var(--border); }
.timeline li:last-child { border-bottom: 0; }
.timeline .d { flex: 0 0 150px; font-family: var(--f-mono); font-size: .85rem; color: var(--brand-2); }
.timeline .e { color: var(--text); font-size: .96rem; }
.callout-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

/* ===================================================================
   Blog-style dataset article (consistent left-aligned reading column)
   =================================================================== */
/* reading column matches the nav width (aligns with the logo and the theme toggle) */
.read { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
/* running text stays at a comfortable measure; figures & cards fill the full width */
.post p, .post ul, .post ol, .post .lead-para, .post .pullquote,
.post .authorline, .post .affil, .post pre,
.post .callout, .post .keyfacts, .post .challenge-banner, .post .badges,
.blog-hero .sub, .blog-hero .meta { max-width: var(--read-col); }

/* Justify running body text (not display leads, author lists or captions) */
.post p:not(.lead-para):not(.authorline):not(.affil), .post li,
.article p, .article li,
.prose p, .prose li {
  text-align: justify;
  -webkit-hyphens: auto;
  hyphens: auto;
}
.prose { max-width: var(--read-col); }

/* reading progress bar */
.reading-progress { position: fixed; top: 72px; left: 0; height: 3px; width: 0; z-index: 99; background: var(--grad); transition: width .08s linear; }
@media (max-width: 620px) { .reading-progress { top: 64px; } }

/* blog hero — content sits in the same .read column as the body */
.blog-hero { position: relative; overflow: hidden; padding: 124px 0 44px; border-bottom: 1px solid var(--border); }
.blog-hero::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(760px 360px at 0% -12%, rgba(228,0,50,.14), transparent 60%), radial-gradient(640px 360px at 100% 0%, rgba(255,91,77,.1), transparent 55%);
}
.blog-hero .read { position: relative; z-index: 1; }
.blog-hero h1 { font-size: clamp(2.1rem, 4.8vw, 3.1rem); line-height: 1.08; margin: 14px 0 16px; }
.blog-hero .sub { color: var(--muted); font-size: 1.12rem; line-height: 1.6; }
.blog-hero .meta { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 22px; font-family: var(--f-mono); font-size: .8rem; color: var(--muted); }
.blog-hero .meta span { display: inline-flex; align-items: center; gap: 7px; }
.blog-hero .meta b { color: var(--heading); font-weight: 600; }

/* post body */
.post { padding: 8px 0 50px; }
.post .authorline { color: var(--text); font-size: .98rem; line-height: 1.6; }
.post .affil { color: var(--muted); font-size: .86rem; margin-top: 8px; line-height: 1.6; }
.post .badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 8px; }
.post .badges img { height: 26px; border-radius: 5px; }
.post .lead-para { font-family: var(--f-display); font-weight: 500; font-size: 1.28rem; line-height: 1.6; color: var(--heading); margin: 30px 0; letter-spacing: -.01em; }
.post p { font-size: 1.07rem; line-height: 1.85; margin-bottom: 1.3em; color: var(--text); }
.post p > a { border-bottom: 1px solid rgba(228,0,50,.4); }
.post p > a:hover { border-color: var(--brand-3); }
.post h2 { font-size: 1.7rem; margin: 56px 0 8px; scroll-margin-top: 90px; }
.post h2 .nm { display: block; font-family: var(--f-mono); font-size: .76rem; letter-spacing: .12em; text-transform: uppercase; color: var(--brand-2); margin-bottom: 8px; }
.post h3 { font-size: 1.18rem; color: var(--brand-2); margin: 34px 0 10px; }
.post ul, .post ol { margin: 0 0 1.4em 1.2em; }
.post li { margin-bottom: .55em; font-size: 1.04rem; line-height: 1.7; }
.post hr { border: 0; border-top: 1px solid var(--border); margin: 44px 0; }

/* pull quote */
.pullquote { border-left: 3px solid var(--brand-2); padding: 4px 0 4px 22px; margin: 36px 0; font-family: var(--f-display); font-weight: 500; font-size: 1.32rem; line-height: 1.5; color: var(--heading); letter-spacing: -.01em; }

/* key-facts strip */
.keyfacts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 26px 0 6px; }
.keyfacts .kf { display: flex; gap: 12px; align-items: baseline; background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 14px 16px; box-shadow: var(--shadow-sm); }
.keyfacts .kf b { font-family: var(--f-display); font-weight: 800; color: var(--heading); white-space: nowrap; }
.keyfacts .kf span { color: var(--muted); font-size: .92rem; }

/* figures (blog) — capped to a readable size; click to open full-size */
.figure { margin: 34px 0; max-width: 720px; }
.figure figcaption { max-width: 720px; }
.figure .frame { border-radius: var(--r-sm); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow); background: var(--surface); display: block; }
.figure .frame img { width: 100%; display: block; transition: transform .55s cubic-bezier(.2,.7,.2,1); }
.figure .frame:hover img { transform: scale(1.035); }
.figure figcaption { font-size: .86rem; color: var(--muted); margin-top: 12px; text-align: center; }
.figure.wide { margin-left: calc((760px - min(1060px, 92vw)) / 2); margin-right: calc((760px - min(1060px, 92vw)) / 2); }
@media (max-width: 1140px) { .figure.wide { margin-left: 0; margin-right: 0; } }

.post .callout { margin: 40px 0; }
.post pre { background: #0a0c16; color: #dfe4f0; border: 1px solid var(--border); border-radius: var(--r-sm); padding: 16px 18px; overflow-x: auto; font-family: var(--f-mono); font-size: .8rem; line-height: 1.6; margin: 8px 0 1.3em; }
.post pre code { font-family: var(--f-mono); font-size: inherit; background: none; border: 0; padding: 0; color: inherit; }
.post code { font-family: var(--f-mono); font-size: .88em; color: var(--brand-3); background: var(--surface-2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; }

/* ===================================================================
   Person / profile page
   =================================================================== */
a.member, a.person { color: inherit; text-decoration: none; display: block; }

/* publications list (research profile) */
.pubs { display: flex; flex-direction: column; gap: 12px; }
.pub { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 18px 20px; box-shadow: var(--shadow-sm); transition: transform .18s ease, box-shadow .2s ease, border-color .2s ease; }
.pub:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: rgba(228,0,50,.3); }
.pub .pv { display: inline-block; font-family: var(--f-mono); font-size: .7rem; letter-spacing: .04em; text-transform: uppercase; color: var(--brand-2); background: var(--surface-2); border: 1px solid var(--border); padding: 3px 10px; border-radius: 999px; margin-bottom: 9px; }
.pub h4 { font-size: 1.02rem; color: var(--heading); margin-bottom: 5px; line-height: 1.35; }
.pub h4 a { color: var(--heading); border-bottom: 1px solid rgba(228,0,50,.4); }
.pub h4 a:hover { color: var(--brand-2); }
.pub .au { font-size: .85rem; color: var(--muted); line-height: 1.5; }
.pub .au b { color: var(--text); font-weight: 600; }
a.member .profile-link { display: inline-flex; align-items: center; gap: 5px; margin-top: 10px; font-family: var(--f-display); font-weight: 600; font-size: .82rem; color: var(--brand-2); transition: gap .18s ease; }
a.member:hover .profile-link { gap: 9px; }

.profile-hero { position: relative; overflow: hidden; padding: 152px 0 60px; border-bottom: 1px solid var(--border); }
.profile-hero #hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.profile-hero::after { content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(820px 420px at 10% -10%, rgba(228,0,50,.16), transparent 60%), radial-gradient(700px 420px at 100% 0%, rgba(255,91,77,.12), transparent 55%); }
.profile-hero .wrap { position: relative; z-index: 2; }
.profile-inner { display: grid; grid-template-columns: 290px 1fr; gap: 50px; align-items: center; }
.profile-photo { position: relative; border-radius: var(--r-lg); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-lg); animation: floaty 7s ease-in-out infinite; }
.profile-photo::after { content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1.5px; background: var(--grad); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity: .6; }
.profile-photo img { width: 100%; aspect-ratio: 1/1; object-fit: cover; object-position: center 22%; display: block; }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@media (prefers-reduced-motion: reduce) { .profile-photo { animation: none; } }
.profile-eyebrow { display: inline-flex; align-items: center; gap: 8px; font-family: var(--f-mono); font-size: .76rem; letter-spacing: .08em; text-transform: uppercase; color: var(--brand-2); background: var(--surface); border: 1px solid var(--border); padding: 7px 14px; border-radius: 999px; margin-bottom: 18px; }
.profile-hero h1 { font-size: clamp(2.2rem, 5vw, 3.3rem); line-height: 1.05; margin-bottom: 10px; }
.profile-title { font-family: var(--f-display); font-weight: 600; font-size: 1.12rem; color: var(--heading); margin-bottom: 6px; }
.profile-focus { font-family: var(--f-mono); font-size: .9rem; color: var(--muted); margin: 8px 0 16px; }
.rotator { display: inline-block; font-weight: 600; transition: opacity .28s ease, transform .28s ease; }
.kw-marquee { padding: 6px 0; }
.kw-marquee .marquee-track { gap: 14px; animation-duration: 38s; }
.kw-marquee .pill { white-space: nowrap; font-size: .85rem; }
@media (prefers-reduced-motion: reduce) { .kw-marquee .marquee-track { flex-wrap: wrap; animation: none; width: auto; } }
.profile-sub { color: var(--muted); font-size: 1.02rem; margin-bottom: 20px; }
.profile-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.role-list { display: flex; flex-direction: column; gap: 12px; }
.role-item { display: flex; gap: 14px; align-items: flex-start; background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 18px 20px; box-shadow: var(--shadow-sm); transition: transform .18s ease, border-color .2s ease; }
.role-item:hover { transform: translateY(-3px); border-color: rgba(228,0,50,.3); }
.role-item .ri { flex: 0 0 auto; width: 42px; height: 42px; border-radius: 11px; background: var(--grad); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.role-item h4 { font-size: 1.04rem; margin-bottom: 3px; }
.role-item p { color: var(--muted); font-size: .92rem; margin: 0; }
.vtimeline { list-style: none; position: relative; margin: 0; padding-left: 26px; }
.vtimeline::before { content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px; width: 2px; background: var(--grad); border-radius: 2px; }
.vtimeline li { position: relative; padding: 0 0 22px 6px; }
.vtimeline li::before { content: ""; position: absolute; left: -26px; top: 5px; width: 13px; height: 13px; border-radius: 50%; background: var(--bg); border: 2.5px solid var(--brand-2); }
.vtimeline li:last-child { padding-bottom: 0; }
.vtimeline .vt-h { font-family: var(--f-display); font-weight: 600; color: var(--heading); }
.vtimeline .vt-s { color: var(--muted); font-size: .92rem; }
@media (max-width: 820px) {
  .profile-inner { grid-template-columns: 1fr; gap: 30px; }
  .profile-photo { max-width: 240px; }
}

/* ---------- Footer ---------- */
.footer { background: #06070e; color: rgba(255,255,255,.66); border-top: 1px solid rgba(255,255,255,.08); padding: 64px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1.2fr; gap: 44px; }
.footer a { color: #fff; }
.footer a:hover { color: #ff8a7d; }
.footer .fb { font-family: var(--f-display); font-weight: 800; font-size: 1.4rem; color: #fff; display: inline-flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer .fb::before { content: ""; width: 26px; height: 26px; border-radius: 8px; background: var(--grad); }
.footer h5 { color: #fff; font-family: var(--f-mono); font-weight: 500; font-size: .76rem; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 14px; }
.footer p { font-size: .94rem; }
.footer .fcol a { display: block; margin-bottom: 8px; }
.footer .fets { display: inline-block; margin-top: 18px; }
.footer .fets img { height: 48px; border-radius: 8px; }
.footer .fbot { border-top: 1px solid rgba(255,255,255,.1); margin-top: 42px; padding-top: 22px; font-size: .85rem; color: rgba(255,255,255,.46); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- Reveal (progressive enhancement: visible without JS) ---------- */
.reveal { opacity: 1; transform: none; transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.js .reveal { opacity: 0; transform: translateY(22px); }
.js .reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .marquee-track, .hero-badge .dot { animation: none; }
}

/* ---------- Helpers ---------- */
.center { text-align: center; }
.mt-sm { margin-top: 14px; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .team-grid { grid-template-columns: repeat(3, 1fr); }
  .roster { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .g3 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .ds-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .roster { grid-template-columns: repeat(2, 1fr); }

  .nav-burger { display: inline-flex; }
  .nav-links {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--glass); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border); padding: 10px 24px 18px;
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease;
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 13px 8px; border-radius: 8px; }
}
@media (max-width: 620px) {
  body { font-size: 16px; }
  .section { padding: 64px 0; }
  .g3, .g2, .stats, .metrics, .team-grid, .roster, .footer-grid { grid-template-columns: 1fr; }
  .news-item { flex-direction: column; gap: 6px; }
  .timeline li { flex-direction: column; gap: 2px; }
  .timeline .d { flex-basis: auto; }
  .hero { min-height: auto; padding-top: 130px; }
}