/* TORCH Lab (Rangan group) — NYU color theme (adapted from the FALCON project site) */
:root {
  --violet: #57068c;        /* NYU Violet */
  --violet-deep: #330662;   /* Deep violet */
  --violet-ultra: #8900e1;  /* Ultra violet */
  --violet-light: #eee6f3;  /* Light violet tint */
  --violet-mid: #c9b3d9;
  --ink: #1d1626;
  --ink-soft: #4a4257;
  --muted: #6d6578;
  --line: #e4dde9;
  --bg: #ffffff;
  --bg-alt: #f7f4f9;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(30, 10, 50, .06), 0 8px 24px rgba(30, 10, 50, .08);
  --maxw: 1140px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Source Serif 4", Georgia, serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--violet); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--violet-ultra); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(160%) blur(8px);
  border-top: 4px solid var(--violet);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; color: var(--ink); }
.brand-logo { height: 38px; width: auto; }
.brand-divider { width: 1px; height: 32px; background: var(--line); }
.brand-mark {
  width: 38px; height: 38px; border-radius: 9px;
  background: var(--violet); display: grid; place-items: center;
}
.brand-mark svg { width: 24px; height: 24px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-weight: 800; letter-spacing: .01em; font-size: 17px; color: var(--violet); }
.brand-sub { font-size: 11px; color: var(--muted); letter-spacing: .06em; text-transform: uppercase; font-weight: 600; }

.nav-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: block; padding: 8px 14px; border-radius: 8px;
  text-decoration: none; color: var(--ink-soft); font-weight: 600; font-size: 15px;
}
.nav-links a:hover { background: var(--violet-light); color: var(--violet); }
.nav-links a[aria-current="page"] { color: var(--violet); background: var(--violet-light); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--line); border-radius: 8px;
  width: 42px; height: 42px; cursor: pointer; color: var(--violet);
}
.nav-toggle svg { width: 22px; height: 22px; margin: auto; }

@media (max-width: 860px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 68px;
    flex-direction: column; background: #fff; padding: 8px 16px 16px;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
}
@media (max-width: 480px) {
  .brand-sub { display: none; }
  .brand-logo { height: 30px; }
  .brand-name { font-size: 15px; }
  .brand { gap: 10px; }
}

/* ---------- Hero (home) ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(137, 0, 225, .55), transparent 60%),
    radial-gradient(800px 400px at 0% 110%, rgba(137, 0, 225, .25), transparent 60%),
    linear-gradient(135deg, var(--violet-deep) 0%, var(--violet) 70%);
  padding: 80px 0 190px;
}
.hero::after { /* subtle signal-wave texture */
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .12;
  background-image: repeating-radial-gradient(circle at 90% 20%, #fff 0 1px, transparent 1px 38px);
}
.hero .container { position: relative; z-index: 1; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px; color: #fff;
  background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .25);
}
.eyebrow-link { text-decoration: none; }
.eyebrow-link:hover { color: #fff; background: rgba(255, 255, 255, .2); }
.hero h1 {
  font-size: clamp(40px, 6.5vw, 72px); line-height: 1.04; margin: 22px 0 14px;
  letter-spacing: -.01em; font-weight: 800;
}
.hero .tagline {
  font-family: var(--font-display); font-size: clamp(20px, 2.4vw, 26px);
  margin: 0 0 20px; color: #f1e6fa; max-width: 760px; line-height: 1.35;
}
.hero .tagline b { color: #fff; font-weight: 700; }
.hero h1 { letter-spacing: .02em; }
.hero .lede { font-size: 17.5px; max-width: 700px; color: rgba(255, 255, 255, .86); margin: 0 0 32px; }

/* ---------- Buttons ---------- */
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 10px;
  font-weight: 700; font-size: 15px; text-decoration: none; transition: transform .15s, background .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--violet); color: #fff; }
.btn-primary:hover { background: var(--violet-deep); color: #fff; }
.btn-outline { color: var(--violet); border: 1px solid var(--violet-mid); background: #fff; }
.btn-outline:hover { background: var(--violet-light); color: var(--violet); }
.hero .btn-primary { background: #fff; color: var(--violet); }
.hero .btn-primary:hover { color: var(--violet-deep); }
.btn-ghost { color: #fff; border: 1px solid rgba(255, 255, 255, .45); }
.btn-ghost:hover { background: rgba(255, 255, 255, .1); color: #fff; }

/* Project cards overlapping the hero */
.overlap { margin-top: -140px; position: relative; z-index: 2; }
.overlap-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 18px;
}
.overlap-head .section-label { color: #e3cdf5; margin: 0; }
.overlap-head a { color: #fff; font-weight: 600; font-size: 15px; text-decoration: none; }
.overlap-head a:hover { text-decoration: underline; color: #fff; }

/* ---------- Page header (inner pages) ---------- */
.page-hero {
  position: relative; overflow: hidden; color: #fff; padding: 60px 0 52px;
  background:
    radial-gradient(900px 300px at 90% -20%, rgba(137, 0, 225, .5), transparent 60%),
    linear-gradient(135deg, var(--violet-deep), var(--violet));
}
.page-hero-overlap { padding-bottom: 104px; } /* room for a card overlapping the banner */
.page-hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .1;
  background-image: repeating-radial-gradient(circle at 95% 0%, #fff 0 1px, transparent 1px 34px);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { margin: 14px 0 8px; font-size: clamp(32px, 4.6vw, 46px); line-height: 1.12; }
.page-hero p { margin: 0; color: rgba(255, 255, 255, .86); max-width: 760px; font-size: 17.5px; }
.page-hero .eyebrow { font-size: 12px; }
.page-hero .hero-meta {
  margin-top: 16px; font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: #e3cdf5;
}

/* ---------- Sections ---------- */
section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-label {
  font-size: 12.5px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--violet-ultra);
  margin: 0 0 10px;
}
h2 { font-size: clamp(28px, 3.4vw, 38px); line-height: 1.15; margin: 0 0 18px; color: var(--violet-deep); }
h3 { font-size: 19px; line-height: 1.3; margin: 0 0 8px; color: var(--ink); }
.section-intro { color: var(--ink-soft); max-width: 760px; font-size: 17.5px; margin: 0 0 36px; }
.section-foot { margin-top: 28px; }

.about-text p { margin: 0 0 16px; color: var(--ink-soft); }
.about-text strong { color: var(--ink); }

.two-col { display: grid; grid-template-columns: 1.2fr 1fr; gap: 56px; align-items: start; }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; gap: 32px; } }

/* ---------- Prose (markdown page bodies) ---------- */
.page-body { padding: 56px 0 72px; }
.prose-narrow { max-width: 860px; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose li { color: var(--ink-soft); }
.prose strong { color: var(--ink); }
.prose h2 { font-size: 28px; margin: 48px 0 16px; padding-bottom: 10px; border-bottom: 2px solid var(--violet-light); }
.prose h3 { margin: 28px 0 8px; }
.prose ul { padding-left: 1.3em; }
.prose li { margin-bottom: 8px; }
.prose li::marker { color: var(--violet-ultra); }
.prose code { background: var(--violet-light); padding: 1px 6px; border-radius: 5px; font-size: .9em; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }

.callout, .note {
  border-left: 4px solid var(--violet); background: var(--violet-light); border-radius: 0 var(--radius) var(--radius) 0;
  padding: 18px 22px; color: var(--violet-deep);
}
.callout { font-family: var(--font-display); font-size: 19px; line-height: 1.5; padding: 22px 26px; }
.callout em { font-style: normal; font-weight: 700; color: var(--violet); }
.prose .note { font-size: 15px; color: var(--violet-deep); }
.prose .btn { margin: 0 8px 8px 0; }
.note p { color: var(--violet-deep); margin: 0; }

/* Keyword chips */
.keywords { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.keywords span {
  font-size: 13.5px; font-weight: 600; color: var(--violet); background: #fff;
  border: 1px solid var(--violet-mid); padding: 5px 12px; border-radius: 999px;
}

/* ---------- Cards ---------- */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
}
.tag {
  display: inline-block; font-size: 11.5px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase;
  color: var(--violet); background: var(--violet-light); padding: 4px 10px; border-radius: 999px; margin-bottom: 12px;
}

/* Project cards (home + research) */
.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 960px) { .project-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .project-grid { grid-template-columns: 1fr; } }
.project-card {
  position: relative; display: flex; flex-direction: column; overflow: hidden;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  color: inherit; text-decoration: none; transition: transform .15s ease, box-shadow .15s ease;
}
.project-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 5px; z-index: 1;
  background: linear-gradient(90deg, var(--violet), var(--violet-ultra));
}
.project-card:hover { transform: translateY(-3px); box-shadow: 0 2px 4px rgba(30, 10, 50, .06), 0 16px 36px rgba(40, 6, 70, .16); color: inherit; }
.project-thumb { width: 100%; aspect-ratio: 5 / 3; object-fit: cover; }
.project-thumb-contain { object-fit: contain; background: #fff; padding: 14px 16px 6px; }
.project-thumb-blank { /* stand-in until a project has its own thumbnail */
  background:
    repeating-radial-gradient(circle at 85% 15%, rgba(255, 255, 255, .16) 0 1px, transparent 1px 26px),
    radial-gradient(400px 200px at 85% 0%, rgba(137, 0, 225, .6), transparent 70%),
    linear-gradient(135deg, var(--violet-deep), var(--violet));
}
.project-body { padding: 26px 24px 22px; display: flex; flex-direction: column; flex: 1; }
.project-body .tag { align-self: flex-start; }
.project-body h3 { color: var(--violet-deep); font-size: 19px; }
.project-body p { margin: 0 0 16px; color: var(--ink-soft); font-size: 15px; }
.project-body .more { margin-top: auto; font-weight: 700; font-size: 14.5px; color: var(--violet); }
.project-card:hover .more { color: var(--violet-ultra); }
.prose .project-grid { margin-top: 8px; }
.project-grid-4 { grid-template-columns: repeat(4, 1fr); gap: 18px; }
.project-grid-4 .project-body { padding: 22px 20px 20px; }
.project-grid-4 .project-body h3 { font-size: 17.5px; }
.project-grid-4 .project-body p { font-size: 14.5px; }
@media (max-width: 1100px) { .project-grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .project-grid-4 { grid-template-columns: 1fr; } }
.section-label.project-group-label { margin: 44px 0 16px; }
.prose .section-label.project-group-label:first-child { margin-top: 0; }

/* Project page: intro + embedded video */
.project-intro { margin-bottom: 56px; align-items: center; }
.video-embed { margin: 0; }
.video-embed-frame {
  aspect-ratio: 504 / 399; width: 100%; border-radius: 18px; overflow: hidden;
  background: var(--violet-deep); box-shadow: 0 20px 60px rgba(40, 6, 70, .22);
}
.video-embed-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.video-embed figcaption { font-size: 14px; color: var(--muted); margin-top: 12px; }

/* Project page: research-area rows (image + text, alternating sides) */
.vectors { display: grid; gap: 28px; }
.vector {
  display: grid; grid-template-columns: 1.15fr 1fr; gap: 36px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow);
  padding: 28px; position: relative; overflow: hidden;
}
.vector::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 5px;
  background: linear-gradient(90deg, var(--violet), var(--violet-ultra));
}
.vector:nth-child(even) .vector-media { order: 2; }
.vector-media {
  display: grid; place-items: center; background: var(--bg-alt); border-radius: 12px; padding: 12px;
}
.vector-media img { max-height: 420px; width: auto; max-width: 100%; border-radius: 8px; }
.thrust-num { font-size: 12.5px; font-weight: 800; letter-spacing: .14em; color: var(--violet-ultra); text-transform: uppercase; }
.prose .vector h3 { font-size: 23px; margin: 6px 0 10px; color: var(--violet-deep); }
.vector-text > p { font-size: 15.5px; margin: 0 0 16px; }
.subthrusts { list-style: none; margin: 0; padding: 0 !important; border-top: 1px solid var(--line); }
.prose .subthrusts li {
  display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; margin: 0;
  border-bottom: 1px solid var(--line); font-size: 14.5px;
}
.subthrusts li a { font-weight: 700; text-decoration: none; }
.subthrusts li a:hover { text-decoration: underline; }
.subthrusts li span { color: var(--muted); text-align: right; }
.prose .credit { font-size: 13.5px; color: var(--muted); margin-top: 14px; }
@media (max-width: 860px) {
  .vector { grid-template-columns: 1fr; gap: 20px; padding: 22px 18px; }
  .vector:nth-child(even) .vector-media { order: 0; }
}

/* Project page: shared blocks (stats, pills, figure, thrusts, people) */
.prose .section-label + h2 { margin-top: 0; }
.prose .section-gap { margin-top: 64px; }

.stat-strip, .prose > .stat-strip:first-child {
  position: relative; margin: -96px 0 56px; display: grid; grid-template-columns: repeat(3, 1fr);
  background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 20px 60px rgba(40, 6, 70, .18);
  overflow: hidden;
}
.stat { padding: 26px 20px 20px; text-align: center; border-right: 1px solid var(--line); }
.stat:nth-child(3) { border-right: 0; }
.stat-num {
  display: block; font-size: clamp(36px, 5vw, 52px); font-weight: 800; line-height: 1; letter-spacing: -.02em;
  background: linear-gradient(90deg, var(--violet), var(--violet-ultra)); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-num small { font-size: .42em; font-weight: 700; margin-left: 4px; letter-spacing: 0; }
.stat-label { display: block; margin-top: 8px; font-size: 12.5px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.prose .stat-note {
  grid-column: 1 / -1; margin: 0; padding: 14px 20px; text-align: center; font-size: 15px;
  background: var(--violet-light); color: var(--violet-deep); font-family: var(--font-display); font-size: 17px;
}

.codesign-intro { margin-bottom: 40px; }
.pill-list { display: grid; gap: 14px; }
.pill {
  display: flex; gap: 16px; align-items: flex-start; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px 20px;
}
.pill .icon {
  flex: none; width: 44px; height: 44px; border-radius: 11px; background: var(--violet-light);
  color: var(--violet); display: grid; place-items: center;
}
.pill .icon svg { width: 24px; height: 24px; }
.prose .pill h3 { font-size: 17px; margin: 0 0 4px; }
.prose .pill p { margin: 0; font-size: 15px; }

.figure-card {
  margin: 0; background: #fff; border-radius: 18px; border: 1px solid var(--line); box-shadow: var(--shadow);
  padding: 24px 24px 18px;
}
.figure-card img { width: 100%; height: auto; }
.figure-card figcaption { font-size: 14.5px; color: var(--muted); margin-top: 12px; text-align: center; }

.thrusts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.thrust {
  position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px 24px; box-shadow: var(--shadow); overflow: hidden;
}
.thrust::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 5px;
  background: linear-gradient(90deg, var(--violet), var(--violet-ultra));
}
.prose .thrust h3 { font-size: 21px; margin: 6px 0 10px; color: var(--violet-deep); }
.prose .thrust > p { margin: 0 0 16px; font-size: 15.5px; }
.prose .thrust .subthrusts li span:first-child { font-weight: 600; color: var(--ink); text-align: left; }
.prose .thrust .subthrusts li span:last-child { white-space: nowrap; }

.team-note { font-size: 15px; margin: -6px 0 22px; }
.pi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.pi-mini {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px 18px 20px; text-align: center;
}
.pi-mini .avatar { width: 96px; height: 96px; font-size: 28px; margin: 0 auto 12px; }
.prose .pi-mini h4 { margin: 0; font-size: 17px; color: var(--ink); }
.prose .pi-mini p { margin: 0; font-size: 14px; line-height: 1.5; }
.avatar {
  flex: none; width: 56px; height: 56px; border-radius: 50%; object-fit: cover;
  border: 3px solid #fff; box-shadow: 0 0 0 2px var(--violet-mid);
}
.avatar-initials {
  display: grid; place-items: center; color: #fff; font-weight: 800; letter-spacing: .03em; font-size: 18px;
  background: linear-gradient(135deg, var(--violet), var(--violet-ultra));
}
.role-badge.lead { background: var(--violet); color: #fff; }

.prose .students-head { margin: 36px 0 14px; font-size: 19px; color: var(--violet-deep); }
.people { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.person {
  display: flex; gap: 16px; align-items: center; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 18px;
}
.prose .person h4 { margin: 0; font-size: 16.5px; }
.person h4 a { color: var(--ink); text-decoration: none; }
.person h4 a:hover { color: var(--violet); }
.person .role-badge { margin: 4px 0 4px; }
.prose .person p { margin: 0; font-size: 14px; line-height: 1.45; }

.prose .pi-mini .pi-aff { margin: 4px 0 8px; font-size: 13.5px; font-weight: 600; color: var(--violet); }
.award-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-bottom: 10px; }

/* Partner organizations (project team pages) */
.thrusts.orgs { grid-template-columns: repeat(3, 1fr); gap: 18px; }
.orgs .thrust { padding: 24px 22px 20px; }
.prose .orgs .thrust h3 { font-size: 19px; margin: 6px 0 8px; }
.prose .orgs .thrust > p { margin: 0; font-size: 14.5px; }
@media (max-width: 960px) { .thrusts.orgs { grid-template-columns: repeat(2, 1fr); } }

/* Curated publication lists (_includes/pub-list.html) */
.prose .pub-list { list-style: none; margin: 0 0 8px; padding: 0; }
.prose .pub-list .pub {
  margin: 0; padding: 6px 0 6px 16px; border-left: 3px solid var(--violet-mid);
  font-size: 15px; line-height: 1.6; color: var(--ink-soft);
}
.prose .pub-list .pub + .pub { margin-top: 8px; }
.pub-title { font-weight: 600; color: var(--violet-deep); }
.pub-title:hover { color: var(--violet); }
.pub-venue { font-style: italic; }
.pub-link, .pub-tag {
  display: inline-block; margin-left: 4px; padding: 0 9px; border-radius: 999px; font-size: 12px;
  font-weight: 700; line-height: 1.7; text-decoration: none; vertical-align: 1px; white-space: nowrap;
}
.pub-link { color: var(--violet); background: #fff; border: 1px solid var(--violet-mid); }
.pub-link:hover { background: var(--violet-light); }
.prose .pub-tag {
  border-radius: 5px; padding: 0 8px; font-size: 11.5px; letter-spacing: .04em; text-transform: uppercase;
  color: var(--violet-deep); background: var(--violet-light); border: 1px solid var(--violet-mid); text-decoration: none;
}
.prose .pub-tag:hover { background: var(--violet-mid); border-color: var(--violet); color: var(--violet-deep); }
.prose .pub-note { margin: 4px 0 0; font-size: 14.5px; color: var(--violet-deep); }
.prose .pub-group { margin-top: 28px; padding: 0; }
.prose .pub-group:first-of-type { margin-top: 12px; }
.prose .pub-group h2 { margin: 0 0 12px; padding-bottom: 6px; font-size: 24px; }
.prose .pub-group h2 a { color: inherit; text-decoration: none; }
.prose .pub-group h2 a:hover { color: var(--violet); }

/* Tab bar for projects with sub-pages */
.subnav { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.subnav a {
  padding: 7px 16px; border-radius: 999px; font-size: 14px; font-weight: 700; text-decoration: none;
  color: #fff; background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .25);
}
.subnav a:hover { background: rgba(255, 255, 255, .22); color: #fff; }
.subnav a.active { background: #fff; color: var(--violet); border-color: #fff; }

.prose .related { margin-top: 40px; }
.prose .ack { margin-top: 28px; font-size: 13px; color: var(--muted); line-height: 1.55; }

@media (max-width: 960px) { .pi-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 760px) {
  .thrusts, .thrusts.orgs { grid-template-columns: 1fr; }
  .stat-strip, .prose > .stat-strip:first-child { margin-top: -72px; }
  .stat { padding: 20px 8px 16px; }
  .stat-label { font-size: 11px; letter-spacing: .06em; }
}
@media (max-width: 480px) { .pi-grid { grid-template-columns: 1fr; } }

/* PI card (home) */
.pi-card { padding: 0; overflow: hidden; }
.pi-card-head { display: flex; gap: 20px; align-items: center; padding: 24px 24px 18px; }
.pi-card-head img {
  width: 96px; height: 96px; border-radius: 50%; object-fit: cover; flex: none;
  border: 3px solid #fff; box-shadow: 0 0 0 2px var(--violet-mid);
}
.pi-card-head h3 { margin: 0 0 2px; font-size: 20px; }
.pi-card-head p { margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.45; }
.pi-card-body { padding: 0 24px 22px; }
.pi-card-body ul { list-style: none; margin: 0 0 18px; padding: 0; border-top: 1px solid var(--line); }
.pi-card-body li { padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; color: var(--ink-soft); }
.pi-card-body .btn-row { gap: 10px; }
.pi-card-body .btn { padding: 9px 16px; font-size: 14px; }

/* PI profile (group page) */
.pi-profile {
  display: grid; grid-template-columns: 240px 1fr; gap: 32px; align-items: start;
  background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); padding: 28px;
}
.pi-photo { width: 100%; border-radius: 12px; }
.pi-bio .pi-title { margin: 0 0 4px; padding: 0; border: 0; font-size: 26px; color: var(--violet-deep); }
.pi-bio .pi-role { font-weight: 600; color: var(--violet); margin: 0 0 16px; font-size: 15px; }
.pi-bio p { font-size: 15.5px; }
@media (max-width: 720px) {
  .pi-profile { grid-template-columns: 1fr; padding: 20px; }
  .pi-photo { max-width: 220px; }
}

/* Members (group page) */
.member-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; margin-top: 8px; }
.member-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 26px 20px 20px; text-align: center; transition: transform .15s ease;
}
.member-card:hover { transform: translateY(-2px); }
.member-photo {
  width: 120px; height: 120px; object-fit: cover; border-radius: 50%; margin: 0 auto 14px;
  background: var(--violet-light); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--violet-mid);
}
.prose .member-name { margin: 0; font-size: 17.5px; }
.member-name a { color: var(--ink); text-decoration: none; }
.member-name a:hover { color: var(--violet); }
.role-badge {
  display: inline-block; font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
  padding: 3px 9px; border-radius: 6px; margin: 6px 0 10px; background: var(--violet-light); color: var(--violet);
}
.prose .member-interests { margin: 0 0 10px; font-size: 14px; line-height: 1.5; }
.prose .member-links { margin: 0; font-size: 14px; font-weight: 600; }

.alumni-list { list-style: none; padding: 0 !important; margin: 0; }
.alumni-list li { padding: 10px 0; border-bottom: 1px solid var(--line); margin: 0; }

/* ---------- News ---------- */
.news-list { list-style: none; padding: 0 !important; margin: 0; }
.prose .news-item { margin: 0; }
.news-item {
  display: grid; grid-template-columns: 110px 1fr; gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--line);
}
.news-item:first-child { padding-top: 0; }
.news-item time { font-weight: 700; color: var(--violet); font-size: 15px; }
.news-item p { margin: 0; color: var(--ink-soft); }
.news-item a { font-weight: 600; white-space: nowrap; }
@media (max-width: 600px) { .news-item { grid-template-columns: 1fr; gap: 4px; } }

/* ---------- Teaching ---------- */
.course-list { list-style: none; padding: 0 !important; margin: 0; display: grid; gap: 14px; }
.course-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; margin: 0 !important;
}
.course-item a { font-weight: 700; text-decoration: none; }
.course-item a:hover { text-decoration: underline; }
.course-term { color: var(--muted); font-size: 14px; }
.course-desc { font-size: 15px; color: var(--ink-soft); margin-top: 4px; }
.course-thumb { display: grid; place-items: center; color: rgba(255, 255, 255, .9); }
.course-thumb svg { width: 72px; height: 72px; }
.prose .course-card .course-term { margin: -2px 0 10px; font-size: 13px; font-weight: 700; letter-spacing: .04em; color: var(--violet); }
.llmgrader-intro { align-items: center; margin-bottom: 36px; }
.llmgrader-intro .btn-row { margin-top: 8px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 960px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .feature-grid { grid-template-columns: 1fr; } }

.empty-state {
  text-align: center; border: 2px dashed var(--violet-mid); border-radius: 18px; padding: 56px 24px;
  background: var(--bg-alt);
}
.empty-state p { margin: 0 auto; max-width: 560px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--violet-deep); color: rgba(255, 255, 255, .78); padding: 52px 0 36px; font-size: 15px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 36px; align-items: start; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }
.footer-logo { height: 40px; width: auto; margin-bottom: 18px; }
.site-footer h4 { color: #fff; margin: 0 0 10px; font-size: 15px; letter-spacing: .06em; text-transform: uppercase; }
.site-footer p { margin: 0 0 8px; }
.site-footer a { color: #fff; }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .15); margin-top: 36px; padding-top: 18px; font-size: 13.5px; }

@media (max-width: 600px) {
  .container { padding: 0 16px; }
  section { padding: 52px 0; }
  .hero { padding: 56px 0 170px; }
  .page-hero { padding: 44px 0 40px; }
  .page-hero-overlap { padding-bottom: 88px; }
  .page-body { padding: 40px 0 56px; }
}