/* ============================================================
   NREL Lab — Young-Hoon Kim
   Light brand theme matching REAL Lab: cream paper, navy bands,
   gold-dark accents. Perovskite spectrum kept as the one signature.
   ============================================================ */

:root {
  /* Brand tokens (mirrored from REAL Lab index.css) */
  --navy:       #1a2332;
  --navy-light: #1e2a3d;
  --navy-dark:  #162030;
  --gold:       #82603a;
  --gold-soft:  rgba(130, 96, 58, .10);
  --cream:      #faf4ec;
  --cream-ring: #eadfcb;

  /* Paper + ink */
  --paper:   #ffffff;
  --paper-2: #fbf7f0;
  --ink:     #1a2332;
  --ink-mid: #565f70;
  --ink-dim: #8b91a0;

  /* On-navy ink */
  --on-navy:      #faf4ec;
  --on-navy-mid:  #b9c0cf;
  --on-navy-dim:  #7f8798;

  --maxw: 1160px;
  --pad: clamp(1.25rem, 4vw, 3rem);
  --radius: 14px;

  --font: 'Pretendard Variable', Pretendard, 'Inter', system-ui, sans-serif;
  --font-mono: 'Space Mono', ui-monospace, 'Cascadia Code', Consolas, monospace;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
sub { font-size: .72em; }

/* Focus: gold on light, cream on navy (a11y, REAL Lab pattern) */
:where(a, button):focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 4px;
}
.on-navy :where(a, button):focus-visible { outline-color: var(--cream); }

.gold-rule { height: 3px; width: 100%; background: linear-gradient(90deg, var(--gold), #a17c4e, var(--gold)); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 244, 236, .88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--cream-ring);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: .7rem var(--pad);
  display: flex; align-items: center; gap: 1.5rem;
  position: relative;
}
.nav-toggle {
  display: none; margin-left: auto;
  width: 42px; height: 38px; border: 1px solid var(--cream-ring); border-radius: 9px;
  background: var(--paper); color: var(--navy); font-size: 1.1rem; line-height: 1;
  cursor: pointer; align-items: center; justify-content: center;
}
.nav-toggle:hover { border-color: var(--gold); }
.brand-logo { height: 38px; width: auto; display: block; }
.nav-links { margin-left: auto; display: flex; gap: 1.5rem; }
.nav-links a {
  font-size: .93rem; color: var(--ink-mid); font-weight: 500;
  position: relative; padding: .2rem 0;
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -3px; height: 2px; width: 0;
  background: var(--gold); transition: width .28s var(--ease);
}
.nav-links a:hover { color: var(--navy); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  font-size: .85rem; font-weight: 600; color: var(--navy);
  padding: .45rem .9rem; border: 1px solid var(--cream-ring); border-radius: 999px;
  transition: border-color .25s, background .25s;
}
.nav-cta:hover { border-color: var(--gold); background: var(--gold-soft); }

/* ---------- Shared ---------- */
.eyebrow {
  font-family: var(--font-mono); font-size: .74rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--gold);
}
.on-navy .eyebrow { color: #c8a877; }

.section { max-width: var(--maxw); margin: 0 auto; padding: clamp(3.5rem, 7vw, 5.5rem) var(--pad) 0; }
.section-head { margin-bottom: 2.4rem; }
.section-kicker {
  display: inline-block; font-family: var(--font-mono); font-size: .74rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--gold);
  padding-bottom: .6rem;
}
.section-head h2 {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem); font-weight: 800;
  letter-spacing: -.02em; line-height: 1.1; color: var(--navy);
}
.section-note { margin-top: .9rem; color: var(--ink-mid); font-size: 1rem; max-width: 60ch; }
.section-note a { color: var(--gold); font-weight: 600; border-bottom: 1px solid rgba(130,96,58,.35); }
.lead { font-size: clamp(1.15rem, 2vw, 1.4rem); font-weight: 600; line-height: 1.45; color: var(--navy); }

/* ---------- Hero (navy band) ---------- */
.hero { background: linear-gradient(160deg, var(--navy-light), var(--navy) 55%, var(--navy-dark)); color: var(--on-navy); }
.hero-inner {
  max-width: var(--maxw); margin: 0 auto; padding: clamp(3rem, 6vw, 4.5rem) var(--pad);
}
.hero-copy { max-width: 62ch; }
.hero-copy .eyebrow { display: block; margin-bottom: 1.2rem; }
#hero-title {
  font-size: clamp(1.9rem, 4.2vw, 3.1rem); font-weight: 800; line-height: 1.12;
  letter-spacing: -.02em; color: var(--on-navy);
}
.hero-lead { margin-top: 1.4rem; font-size: clamp(1rem, 1.5vw, 1.15rem); color: var(--on-navy-mid); max-width: 44ch; line-height: 1.55; }
.hl { color: #b6a1d8; font-weight: 600; }
.hl.hl2 { color: #7fd0be; }
.hl.hl3 { color: #e6b775; }
.hero-pi { margin-top: 1.3rem; font-size: 1rem; color: var(--on-navy-mid); }
.hero-pi strong { color: var(--on-navy); font-weight: 700; }

.hero-metrics { display: flex; gap: 2.4rem; margin-top: 2.2rem; }
.metric { display: flex; flex-direction: column; }
.metric-value { font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 800; line-height: 1; color: var(--on-navy); }
.metric-label { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; color: var(--on-navy-dim); margin-top: .5rem; }

/* ---------- Signature spectrum ---------- */
.spectrum {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(250, 244, 236, .16);
  border-radius: var(--radius); padding: 1.4rem 1.4rem 1.1rem;
  box-shadow: 0 24px 60px -30px rgba(0,0,0,.6);
}
.spectrum-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin-bottom: 1.2rem; }
.spectrum-title { font-weight: 700; font-size: .98rem; color: var(--on-navy); }
.spectrum-sub { font-family: var(--font-mono); font-size: .7rem; color: var(--on-navy-dim); }
.spectrum-bars { display: grid; grid-template-columns: repeat(12, 1fr); align-items: end; gap: 6px; height: 210px; border-bottom: 1px solid rgba(250,244,236,.18); padding-bottom: 2px; }
.bar {
  position: relative; height: calc(var(--h) * 100%); min-height: 5px;
  border-radius: 5px 5px 2px 2px;
  background: linear-gradient(180deg, var(--c), color-mix(in srgb, var(--c) 70%, transparent));
  box-shadow: 0 0 14px -1px var(--c);
  transform-origin: bottom; transform: scaleY(0);
  animation: emit .85s var(--ease) forwards; animation-delay: calc(var(--i, 0) * 65ms);
}
.bar::after {
  content: attr(data-val); position: absolute; top: -1.5rem; left: 50%; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: .66rem; color: var(--on-navy);
  background: var(--navy-dark); border: 1px solid rgba(250,244,236,.2);
  padding: .1rem .4rem; border-radius: 5px; white-space: nowrap; opacity: 0; transition: opacity .2s; pointer-events: none;
}
.bar:hover::after { opacity: 1; }
.bar.partial { opacity: .6; background-image: repeating-linear-gradient(-45deg, var(--c) 0 4px, transparent 4px 8px); }
@keyframes emit { to { transform: scaleY(1); } }
.spectrum-axis { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: .66rem; color: var(--on-navy-dim); margin-top: .5rem; }
.spectrum-cap { font-size: .7rem; color: var(--on-navy-dim); margin-top: .7rem; }

/* ---------- About ---------- */
.about-body { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.about-body p:last-child { color: var(--ink-mid); }
.about-divider {
  display: flex; align-items: center; gap: 1rem;
  margin: 2.2rem 0 1.8rem;
}
.about-divider::before, .about-divider::after { content: ""; flex: 1; height: 1px; background: var(--cream-ring); }
.about-divider span {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--gold);
}
.about-body-ko .lead { color: var(--navy); }

/* ---------- Bilingual (KO) glosses — research.html ---------- */
.lang-ko { color: var(--ink-dim); }
.section-head h2 .lang-ko, .card h3 .lang-ko, #cmp-battery h3 .lang-ko {
  display: block; font-size: .58em; font-weight: 600; letter-spacing: 0;
  text-transform: none; color: var(--ink-dim); margin-top: .3rem;
}
.section-kicker .lang-ko { font-weight: 500; text-transform: none; letter-spacing: 0; margin-left: .4em; }
.eyebrow .lang-ko { font-weight: 500; text-transform: none; letter-spacing: 0; margin-left: .4em; }
.card-ko {
  margin-top: .6rem; padding-top: .55rem; border-top: 1px dashed var(--cream-ring);
  font-size: .88rem; line-height: 1.55; color: var(--ink-dim);
}
.card-ko strong { color: var(--ink-mid); }
.pagehead-sub-ko { margin-top: .7rem; max-width: 62ch; font-size: .95rem; color: var(--on-navy-dim); }
.pagehead-sub-ko strong { color: var(--on-navy-mid); }

/* ---------- Research page — topic figure ---------- */
.research-figure { margin-top: 2rem; }
.research-figure.gallery { display: flex; flex-direction: column; gap: 1rem; }
.research-figure.gallery-row { flex-direction: row; }
.research-figure .gallery-item {
  display: block; width: 100%; border-radius: var(--radius);
  border: 1px solid var(--cream-ring); overflow: hidden;
  box-shadow: 0 20px 50px -28px rgba(26,35,50,.4);
}
.research-figure.gallery-row .gallery-item { flex: 1 1 0; aspect-ratio: 4 / 3; }
.research-figure .gallery-item img { width: 100%; height: auto; display: block; }
.research-figure.gallery-row .gallery-item img { height: 100%; object-fit: cover; }
.research-figcap { margin-top: .8rem; font-size: .9rem; color: var(--ink-mid); }

/* ---------- Research page — figure-left topic layout ---------- */
.research-body-figure { display: grid; grid-template-columns: minmax(380px, 640px) 1fr; gap: clamp(1.8rem, 4vw, 3rem); align-items: center; }
.research-body-figure .research-figure { margin-top: 0; position: sticky; top: 90px; }
.research-body-figure .research-figure-text { font-size: 1.05rem; color: var(--navy); line-height: 1.7; }
.research-body-figure .research-figure-text .lead { font-size: 1.1rem; margin-bottom: .8rem; }
@media (max-width: 900px) {
  .research-body-figure { grid-template-columns: 1fr; }
  .research-body-figure .research-figure { position: static; max-width: 640px; }
}

/* ---------- PI ---------- */
.pi-body { display: grid; grid-template-columns: 300px 1fr; gap: clamp(1.8rem, 4vw, 3rem); align-items: start; }
.pi-figure { position: sticky; top: 90px; }
.pi-figure img { width: 100%; border-radius: var(--radius); border: 1px solid var(--cream-ring); display: block; box-shadow: 0 20px 50px -28px rgba(26,35,50,.4); }
.pi-contactcard { margin-top: 1rem; background: var(--paper); border: 1px solid var(--cream-ring); border-radius: var(--radius); padding: 1.1rem 1.2rem; border-top: 3px solid var(--gold); }
.pi-role { font-weight: 800; color: var(--navy); font-size: 1.05rem; }
.pi-dept { color: var(--ink-mid); font-size: .9rem; margin-top: .2rem; }
.pi-mail { display: block; margin-top: .8rem; color: var(--gold); font-weight: 600; font-size: .92rem; word-break: break-all; }
.pi-scholar { display: block; margin-top: .35rem; color: var(--ink-mid); font-size: .88rem; }
.pi-scholar:hover, .pi-mail:hover { text-decoration: underline; }

.pi-intro { font-size: 1.08rem; color: var(--navy); line-height: 1.55; margin-bottom: 1.8rem; }
.pi-intro em { font-style: normal; font-weight: 700; color: var(--gold); }
.pi-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 1.8rem 2.4rem; margin-bottom: 1.8rem; }
.pi-block h3 { font-size: .78rem; font-family: var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--gold); margin-bottom: .9rem; }
.timeline { list-style: none; display: flex; flex-direction: column; gap: .85rem; }
.timeline li { display: grid; grid-template-columns: 92px 1fr; gap: .8rem; font-size: .93rem; }
.t-when { font-family: var(--font-mono); font-size: .78rem; color: var(--ink-dim); padding-top: .12rem; }
.t-what { color: var(--navy); }
.t-what strong { font-weight: 700; }
.t-sub { color: var(--ink-mid); font-size: .84rem; }
.bullets { list-style: none; display: flex; flex-direction: column; gap: .6rem; }
.bullets li { position: relative; padding-left: 1.1rem; font-size: .93rem; color: var(--navy); }
.bullets li::before { content: ''; position: absolute; left: 0; top: .6em; width: 6px; height: 6px; border-radius: 50%; background: var(--gold); }
.bullets em { font-style: italic; color: var(--ink-mid); }

/* ---------- Research cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.card {
  position: relative; background: var(--paper); border: 1px solid var(--cream-ring);
  border-radius: var(--radius); padding: 1.7rem 1.5rem 1.6rem;
  border-top: 3px solid var(--gold);
  transition: transform .3s var(--ease), box-shadow .3s, border-color .3s;
}
.card-num { font-family: var(--font-mono); font-size: .78rem; color: var(--ink-dim); }
.card h3 { font-size: 1.15rem; font-weight: 700; color: var(--navy); margin: .5rem 0 .55rem; line-height: 1.25; }
.card p { color: var(--ink-mid); font-size: .95rem; line-height: 1.55; }
.card:hover { transform: translateY(-5px); box-shadow: 0 22px 50px -30px rgba(26,35,50,.45); border-color: var(--gold); }

/* ---------- Publications ---------- */
.hl-strip { display: flex; gap: .7rem; overflow-x: auto; padding-bottom: .3rem; }
.hl-strip a {
  display: block; flex: 0 0 auto; width: 88px; aspect-ratio: 4 / 5; border-radius: 8px;
  overflow: hidden; border: 1px solid var(--cream-ring);
  box-shadow: 0 12px 28px -16px rgba(26,35,50,.4);
  transition: transform .2s var(--ease), border-color .2s;
}
.hl-strip a:hover, .hl-strip a:focus-visible { transform: translateY(-3px); border-color: var(--gold); }
.hl-strip img { width: 100%; height: 100%; object-fit: cover; display: block; }
.pub-list { list-style: none; counter-reset: pub; }
.pub { counter-increment: pub; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1.2rem; padding: 1.1rem 0; border-bottom: 1px solid var(--cream-ring); transition: padding-left .28s var(--ease); }
.pub::before { content: counter(pub, decimal-leading-zero); font-family: var(--font-mono); font-size: .8rem; color: var(--ink-dim); align-self: start; padding-top: .2rem; }
.pub:hover { padding-left: .5rem; }
.pub:hover .pub-title { color: var(--gold); }
.pub-title { font-size: 1.04rem; font-weight: 700; color: var(--navy); line-height: 1.35; transition: color .2s; }
.pub-meta { font-size: .86rem; color: var(--ink-mid); margin-top: .35rem; }
.pub-meta em { font-style: italic; }
.venue { display: inline-block; font-family: var(--font-mono); font-size: .7rem; color: var(--navy); background: var(--gold-soft); border: 1px solid var(--cream-ring); border-radius: 5px; padding: .05rem .4rem; margin-right: .45rem; }
.venue-top { color: #fff; background: var(--gold); border-color: transparent; font-weight: 700; }
a.venue { text-decoration: none; cursor: pointer; transition: filter .2s, transform .15s; }
a.venue:hover { filter: brightness(0.94); }
a.venue.venue-top:hover { filter: brightness(1.12); }
a.venue:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
a.venue:active { transform: scale(.97); }
.pub-cite { display: grid; justify-items: end; gap: .3rem; min-width: 76px; }
.cite-count { font-family: var(--font-mono); font-weight: 700; font-size: 1.05rem; color: var(--navy); }
.cite-bar { width: 76px; height: 4px; border-radius: 999px; background: var(--cream-ring); position: relative; overflow: hidden; }
.cite-bar::after { content: ''; position: absolute; inset: 0 auto 0 0; width: calc(var(--w) * 100%); background: linear-gradient(90deg, var(--gold), #a8824f); border-radius: 999px; }

/* ---------- Members ---------- */
.member-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.mcard { background: var(--paper); border: 1px solid var(--cream-ring); border-radius: var(--radius); padding: 1.2rem 1.2rem 1.3rem; transition: transform .28s var(--ease), box-shadow .28s; }
.mcard:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -28px rgba(26,35,50,.4); }
.mcard-top { display: flex; flex-direction: column; align-items: center; text-align: center; gap: .7rem; margin-bottom: .9rem; }
.mavatar { width: 100%; aspect-ratio: 4 / 5; border-radius: calc(var(--radius) - 6px); display: grid; place-items: center; font-family: var(--font-mono); font-weight: 700; font-size: 1.6rem; color: var(--cream); background: linear-gradient(140deg, var(--navy-light), var(--navy)); flex: 0 0 auto; }
.mavatar.pd { background: linear-gradient(140deg, var(--gold), #6d4f2e); }
.mname { display: block; font-weight: 700; color: var(--navy); font-size: 1.02rem; line-height: 1.25; }
.mrole { display: block; font-family: var(--font-mono); font-size: .7rem; color: var(--ink-dim); margin-top: .25rem; }
.mint { font-size: .86rem; color: var(--ink-mid); }
.mint-label { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .08em; text-transform: uppercase; color: var(--gold); display: block; margin-bottom: .15rem; }

/* ---------- News ---------- */
.news-list { list-style: none; }
.news-item { display: grid; grid-template-columns: 96px 1fr; gap: 1.3rem; padding: 1.1rem 0; border-top: 1px solid var(--cream-ring); }
.news-item:last-child { border-bottom: 1px solid var(--cream-ring); }
.news-date { font-family: var(--font-mono); font-size: .82rem; color: var(--gold); padding-top: .1rem; }
.news-item p { color: var(--ink-mid); }
.news-item strong { color: var(--navy); font-weight: 700; }
.news-item em { font-style: italic; }
.news-item p a { color: var(--gold); text-decoration: underline; text-decoration-color: var(--cream-ring); text-underline-offset: 2px; }
.news-item p a:hover { text-decoration-color: var(--gold); }
.news-item p a:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; border-radius: 2px; }

/* ---------- Contact / footer (navy) ---------- */
.contact { margin-top: clamp(4rem, 8vw, 6.5rem); background: linear-gradient(160deg, var(--navy-light), var(--navy-dark)); color: var(--on-navy); border-top: 3px solid var(--gold); }
.contact-inner { max-width: var(--maxw); margin: 0 auto; padding: clamp(3rem, 6vw, 4.5rem) var(--pad); display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(2rem, 5vw, 4rem); }
.contact-lead .eyebrow { display: block; margin-bottom: 1rem; }
.contact-lead h2 { font-size: clamp(1.7rem, 3.5vw, 2.5rem); font-weight: 800; line-height: 1.1; letter-spacing: -.02em; max-width: 15ch; color: var(--on-navy); }
.contact-sub { margin-top: 1.1rem; color: var(--on-navy-mid); max-width: 46ch; }
.contact-mail { display: inline-block; margin-top: 1.5rem; font-weight: 700; font-size: clamp(1.05rem, 2vw, 1.3rem); color: #e6b775; border-bottom: 1px solid rgba(230,183,117,.4); padding-bottom: .15rem; word-break: break-all; }
.contact-details dt { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; color: var(--on-navy-dim); margin-top: 1.15rem; }
.contact-details dt:first-child { margin-top: 0; }
.contact-details dd { font-size: .96rem; color: var(--on-navy); margin-top: .3rem; line-height: 1.5; }
.contact-links { display: flex; gap: 1.3rem; flex-wrap: wrap; }
.contact-links a { color: #c8a877; }
.contact-links a:hover { text-decoration: underline; }
.footer-base { max-width: var(--maxw); margin: 0 auto; padding: 1.3rem var(--pad); border-top: 1px solid rgba(250,244,236,.12); display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .78rem; color: var(--on-navy-dim); }
.footer-note { font-family: var(--font-mono); }

/* ---------- Nav active state (multipage) ---------- */
.nav-links a.active { color: var(--navy); font-weight: 600; }
.nav-links a.active::after { width: 100%; }

/* ---------- Interior page header band ---------- */
.pagehead { background: linear-gradient(160deg, var(--navy-light), var(--navy-dark)); color: var(--on-navy); }
.pagehead-inner { max-width: var(--maxw); margin: 0 auto; padding: clamp(2.6rem, 5vw, 3.8rem) var(--pad); }
.pagehead .eyebrow { display: block; margin-bottom: .8rem; }
.pagehead h1 { font-size: clamp(1.9rem, 4vw, 2.9rem); font-weight: 800; letter-spacing: -.02em; color: var(--on-navy); line-height: 1.1; }
.pagehead-sub { margin-top: 1rem; color: var(--on-navy-mid); max-width: 62ch; font-size: 1.02rem; }
.pagehead-metrics { display: flex; gap: 2.2rem; margin-top: 1.8rem; flex-wrap: wrap; }
.pagehead-metrics .metric-value { color: var(--on-navy); }
.pagehead-metrics .metric-label { color: var(--on-navy-dim); }

.pagehead-split {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem, 5vw, 4rem); align-items: center;
}
.pagehead-split .spectrum { justify-self: end; width: 100%; }

/* first section after a pagehead keeps comfortable rhythm */
.pagehead + main .section:first-child { padding-top: clamp(2.8rem, 5vw, 4rem); }

/* ---------- Home landing extras ---------- */
.home-cta { display: inline-flex; align-items: center; gap: .5rem; margin-top: 1.6rem; font-weight: 600; font-size: .95rem; color: var(--navy); border: 1px solid var(--cream-ring); border-radius: 999px; padding: .6rem 1.2rem; transition: border-color .25s, background .25s; }
.home-cta:hover { border-color: var(--gold); background: var(--gold-soft); }
.home-cta.on-dark { color: var(--on-navy); border-color: rgba(250,244,236,.28); }
.home-cta.on-dark:hover { border-color: var(--cream); background: rgba(250,244,236,.08); }
.glance .card { cursor: pointer; }
.glance-link { color: inherit; display: block; }
.section-more { margin-top: 1.8rem; }
.newsprev { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.newsprev-item { background: var(--paper); border: 1px solid var(--cream-ring); border-radius: var(--radius); padding: 1.3rem 1.3rem 1.4rem; border-top: 3px solid var(--gold); }
.newsprev-item .news-date { display: block; margin-bottom: .6rem; }
.newsprev-item p { color: var(--ink-mid); font-size: .95rem; }
.newsprev-item strong { color: var(--navy); }

.video-embed { position: relative; width: 100%; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: var(--radius); border: 1px solid var(--cream-ring); background: var(--navy); }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ---------- Shared site footer (all pages) ---------- */
.site-footer { margin-top: clamp(3.5rem, 7vw, 5.5rem); background: linear-gradient(160deg, var(--navy-light), var(--navy-dark)); color: var(--on-navy); border-top: 3px solid var(--gold); }
.footer-inner { max-width: var(--maxw); margin: 0 auto; padding: clamp(2.4rem, 5vw, 3.4rem) var(--pad); display: grid; grid-template-columns: 1.2fr 1.4fr 1fr; gap: 2rem; }
.foot-brand { font-weight: 800; font-size: 1.1rem; color: var(--on-navy); }
.foot-sub { color: var(--on-navy-dim); font-size: .85rem; margin-top: .35rem; max-width: 34ch; }
.foot-col h4 { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; color: var(--on-navy-dim); margin-bottom: .6rem; }
.foot-col p { color: var(--on-navy-mid); font-size: .9rem; line-height: 1.55; }
.foot-col p + p { margin-top: .5rem; }
.foot-links { display: flex; flex-direction: column; gap: .5rem; }
.foot-links a { color: #c8a877; font-size: .9rem; }
.foot-links a:hover { text-decoration: underline; }
.footer-base { max-width: var(--maxw); margin: 0 auto; padding: 1.2rem var(--pad); border-top: 1px solid rgba(250,244,236,.12); display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .78rem; color: var(--on-navy-dim); }
.footer-base .footer-note { font-family: var(--font-mono); }
@media (max-width: 820px) { .footer-inner { grid-template-columns: 1fr 1fr; } .newsprev { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .footer-inner { grid-template-columns: 1fr; } .footer-base { flex-direction: column; } }

/* ---------- Publications: year grouping ---------- */
.pub-year { margin-top: 2.6rem; }
.pub-year:first-of-type { margin-top: 0; }
.pub-year-label { font-family: var(--font-mono); font-size: 1rem; font-weight: 700; color: var(--gold); padding-bottom: .3rem; border-bottom: 2px solid var(--cream-ring); margin-bottom: .4rem; display: flex; align-items: baseline; gap: .6rem; }
.pub-year-count { font-size: .72rem; color: var(--ink-dim); font-weight: 400; }
.pub-simple { list-style: none; }
.pub-simple li { display: grid; grid-template-columns: auto 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--cream-ring); }
.pub-simple .pnum { font-family: var(--font-mono); font-size: .8rem; color: var(--ink-dim); padding-top: .15rem; }
.pub-simple .ptitle { font-weight: 700; color: var(--navy); font-size: 1.02rem; line-height: 1.35; }
.pub-simple .pmeta { font-size: .85rem; color: var(--ink-mid); margin-top: .3rem; }
.pub-simple .pmeta .venue { margin-right: .45rem; }

/* ---------- Reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .65s var(--ease), transform .65s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
  .pagehead-split { grid-template-columns: 1fr; }
  .about-body { grid-template-columns: 1fr; }
  .pi-body { grid-template-columns: 1fr; }
  .pi-figure { position: static; max-width: 300px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .member-grid { grid-template-columns: repeat(3, 1fr); }
  .nav-toggle { display: inline-flex; }
  .nav-cta { display: none; }
  .nav-links {
    position: absolute; top: calc(100% + 1px); left: 0; right: 0;
    flex-direction: column; gap: 0; margin-left: 0;
    background: var(--cream); border-bottom: 1px solid var(--cream-ring);
    padding: .3rem var(--pad) 1rem;
    box-shadow: 0 20px 40px -24px rgba(26,35,50,.4);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .85rem 0; border-bottom: 1px solid var(--cream-ring); font-size: 1rem; }
  .nav-links a::after { display: none; }
  .nav-links a.active { color: var(--gold); }
}
@media (max-width: 620px) {
  body { font-size: 16px; }
  .cards, .member-grid { grid-template-columns: 1fr; }
  .pi-cols { grid-template-columns: 1fr; }
  .hero-metrics { gap: 1.6rem; }
  .pub { grid-template-columns: auto 1fr; }
  .pub-cite { grid-column: 2; justify-items: start; margin-top: .4rem; }
  .cite-bar { display: none; }
  .news-item { grid-template-columns: 1fr; gap: .3rem; }
  .contact-inner { grid-template-columns: 1fr; }
  .footer-base { flex-direction: column; }
}
@media (min-width: 621px) and (max-width: 940px) { .member-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Team page: PI / Current Members / Alumni / Join (CSS-only tabs, no JS) ---------- */
.team-tab-input { position: absolute; opacity: 0; width: 1px; height: 1px; pointer-events: none; }
.team-tab-bar { display: flex; gap: .3rem; flex-wrap: wrap; border-bottom: 1px solid var(--cream-ring); margin-bottom: clamp(2.2rem, 4vw, 3.2rem); }
.team-tab-label { cursor: pointer; font-family: var(--font-mono); font-size: .82rem; letter-spacing: .03em; color: var(--ink-mid); padding: .8rem 1.05rem; border-bottom: 3px solid transparent; margin-bottom: -1px; transition: color .2s, border-color .2s; }
.team-tab-label:hover { color: var(--navy); }
.team-panel { display: none; }
#tab-pi:checked ~ .team-tab-bar label[for="tab-pi"],
#tab-members:checked ~ .team-tab-bar label[for="tab-members"],
#tab-alumni:checked ~ .team-tab-bar label[for="tab-alumni"],
#tab-join:checked ~ .team-tab-bar label[for="tab-join"] { color: var(--navy); border-color: var(--gold); font-weight: 700; }
#tab-pi:checked ~ #panel-pi,
#tab-members:checked ~ #panel-members,
#tab-alumni:checked ~ #panel-alumni,
#tab-join:checked ~ #panel-join { display: block; }
#tab-pi:focus-visible ~ .team-tab-bar label[for="tab-pi"],
#tab-members:focus-visible ~ .team-tab-bar label[for="tab-members"],
#tab-alumni:focus-visible ~ .team-tab-bar label[for="tab-alumni"],
#tab-join:focus-visible ~ .team-tab-bar label[for="tab-join"] { outline: 2px solid var(--gold); outline-offset: 2px; border-radius: 4px; }

/* ---------- Publications page: HYU / Before-HYU era (reuses .team-tab-* CSS-only tabs) ---------- */
#pub-tab-hyu:checked ~ .team-tab-bar label[for="pub-tab-hyu"],
#pub-tab-early:checked ~ .team-tab-bar label[for="pub-tab-early"] { color: var(--navy); border-color: var(--gold); font-weight: 700; }
#pub-tab-hyu:checked ~ #pub-panel-hyu,
#pub-tab-early:checked ~ #pub-panel-early { display: block; }
#pub-tab-hyu:focus-visible ~ .team-tab-bar label[for="pub-tab-hyu"],
#pub-tab-early:focus-visible ~ .team-tab-bar label[for="pub-tab-early"] { outline: 2px solid var(--gold); outline-offset: 2px; border-radius: 4px; }

.mphoto { width: 100%; aspect-ratio: 4 / 5; border-radius: calc(var(--radius) - 6px); object-fit: cover; flex: 0 0 auto; display: block; transition: opacity .25s var(--ease); }
.mphoto-wrap { position: relative; width: 100%; flex: 0 0 auto; border-radius: calc(var(--radius) - 6px); border: 1px solid var(--cream-ring); overflow: hidden; }
.mphoto-wrap:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.mreveal { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; gap: .6rem; padding: 1rem; background: linear-gradient(150deg, var(--navy-light), var(--navy)); opacity: 0; transition: opacity .25s var(--ease); text-align: left; }
.mphoto-wrap:hover .mphoto, .mphoto-wrap:focus-visible .mphoto, .mphoto-wrap:focus-within .mphoto { opacity: 0; }
.mphoto-wrap:hover .mreveal, .mphoto-wrap:focus-visible .mreveal, .mphoto-wrap:focus-within .mreveal { opacity: 1; }
.mreveal-line { font-size: .76rem; line-height: 1.4; color: var(--cream); }
.mreveal-label { display: block; font-family: var(--font-mono); font-size: .58rem; letter-spacing: .08em; text-transform: uppercase; color: #c8a877; margin-bottom: .12rem; }
.member-group { margin-bottom: clamp(2.4rem, 5vw, 3.4rem); }
.member-group:last-child { margin-bottom: 0; }
.member-group h3 { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--gold); margin-bottom: 1.1rem; }
.alum-meta { font-size: .84rem; color: var(--ink-mid); margin-top: .3rem; line-height: 1.55; }
.alum-meta .now { color: var(--navy); font-weight: 600; }
.alum-contrib { margin-top: .7rem; }
.alum-contrib-label { display: block; font-family: var(--font-mono); font-size: .6rem; letter-spacing: .08em; text-transform: uppercase; color: var(--gold); margin-bottom: .3rem; }
.alum-contrib ul { list-style: none; display: flex; flex-direction: column; gap: .3rem; }
.alum-contrib li { position: relative; padding-left: 1rem; font-size: .78rem; line-height: 1.4; color: var(--ink-mid); }
.alum-contrib li::before { content: ''; position: absolute; left: 0; top: .55em; width: 5px; height: 5px; border-radius: 50%; background: var(--gold); }
.join-note { color: var(--ink-mid); font-size: .92rem; margin-top: 1rem; }

/* ---------- Figure galleries (publications / news / highlights) ---------- */
/* Progressive enhancement: these are plain links to images and work with JS off.
   main.js intercepts clicks on .gallery-item to open a lightbox with prev/next
   across every .gallery-item sharing the same .gallery ancestor. */
.gallery { display: flex; gap: .4rem; flex: 0 0 auto; }
.gallery-item { position: relative; display: block; flex: 0 0 auto; border-radius: 10px; overflow: hidden; border: 1px solid var(--cream-ring); }
.gallery-item img { display: block; width: 100%; height: 100%; object-fit: cover; }
.gallery-item:hover, .gallery-item:focus-visible { border-color: var(--gold); }
/* Highlights thumbnails that link straight to the paper's DOI instead of opening the lightbox */
.doi-thumb { position: relative; display: block; flex: 0 0 auto; width: 100%; height: 100%; border-radius: 10px; overflow: hidden; border: 1px solid var(--cream-ring); }
.doi-thumb img { display: block; width: 100%; height: 100%; object-fit: cover; }
.doi-thumb:hover, .doi-thumb:focus-visible { border-color: var(--gold); }
.gallery-badge {
  position: absolute; right: 4px; bottom: 4px; z-index: 1;
  font-family: var(--font-mono); font-size: .64rem; font-weight: 700; color: #fff;
  background: rgba(26,35,50,.72); border-radius: 999px; padding: .1rem .4rem;
  pointer-events: none;
}

/* Publications: thumb sits to the right of each entry */
.pub-thumb { width: 92px; aspect-ratio: 4 / 5; }
.pub-thumb .gallery-item { width: 100%; height: 100%; }
.pub .pub-thumb { grid-column: 4; }
.pub { grid-template-columns: auto 1fr auto auto; }
.pub-simple li.has-thumb { grid-template-columns: auto 1fr auto; align-items: center; }
.pub-simple .pub-thumb { width: 120px; aspect-ratio: 4 / 3; align-self: center; }

/* News: thumb sits to the right of each item. First image is the
   representative one; extra images show as a small filmstrip beside it —
   real links, visible and clickable without JS, grouped into one lightbox with JS. */
.news-item.has-gallery { grid-template-columns: 96px 1fr auto; }
.news-item .news-thumb { align-self: center; }
.news-item .news-thumb .gallery { align-items: flex-end; }
.news-item .news-thumb .gallery-item { width: 100px; aspect-ratio: 4 / 3; }
.news-item .news-thumb .gallery-item:not(:first-child) { width: 40px; }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 200; display: grid; place-items: center;
  background: rgba(15, 19, 28, .88); padding: clamp(1rem, 4vw, 3rem);
  opacity: 0; pointer-events: none; transition: opacity .22s var(--ease);
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox-figure { position: relative; max-width: min(92vw, 1000px); max-height: 88vh; display: flex; flex-direction: column; align-items: center; gap: .8rem; }
.lightbox-figure img { max-width: 100%; max-height: 72vh; border-radius: 10px; box-shadow: 0 30px 70px -20px rgba(0,0,0,.6); background: var(--paper); }
.lightbox-cap { color: var(--on-navy-mid); font-size: .88rem; text-align: center; max-width: 62ch; }
.lightbox-count { font-family: var(--font-mono); font-size: .72rem; color: var(--on-navy-dim); }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute; border: 1px solid rgba(250,244,236,.28); background: rgba(26,35,50,.55); color: var(--on-navy);
  border-radius: 999px; width: 42px; height: 42px; display: grid; place-items: center; font-size: 1.1rem;
  cursor: pointer; transition: background .2s, border-color .2s;
}
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: rgba(26,35,50,.85); border-color: var(--gold); }
.lightbox-close { top: -52px; right: 0; }
.lightbox-prev { left: -56px; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: -56px; top: 50%; transform: translateY(-50%); }
@media (max-width: 720px) {
  .lightbox-close { top: -48px; right: 0; }
  .lightbox-prev { left: 4px; }
  .lightbox-next { right: 4px; }
}

/* Home page: recruiting popup (same open/close pattern as .lightbox above) */
.join-popup {
  position: fixed; inset: 0; z-index: 210; display: grid; place-items: center;
  background: rgba(15, 19, 28, .72); padding: clamp(1rem, 4vw, 3rem);
  opacity: 0; pointer-events: none; transition: opacity .22s var(--ease);
}
.join-popup.open { opacity: 1; pointer-events: auto; }
.join-popup-card {
  position: relative; max-width: min(92vw, 440px); background: var(--paper);
  border-radius: var(--radius); border-top: 4px solid var(--gold);
  padding: 2rem 1.8rem 1.8rem; box-shadow: 0 30px 70px -20px rgba(0,0,0,.5);
}
.join-popup-close {
  position: absolute; top: .7rem; right: .7rem; width: 34px; height: 34px;
  border: 1px solid var(--cream-ring); background: var(--cream); color: var(--navy);
  border-radius: 999px; display: grid; place-items: center; font-size: 1rem;
  cursor: pointer; transition: background .2s, border-color .2s;
}
.join-popup-close:hover { background: var(--gold-soft); border-color: var(--gold); }
.join-popup-eyebrow { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--gold); margin-bottom: .6rem; }
.join-popup-card h2 { font-size: 1.5rem; font-weight: 800; color: var(--navy); line-height: 1.25; }
.join-popup-body { margin-top: .8rem; color: var(--ink-mid); font-size: .95rem; line-height: 1.6; }
.join-popup-cta { display: inline-block; margin-top: 1.3rem; font-weight: 700; color: var(--gold); border-bottom: 1px solid rgba(130,96,58,.35); }
.join-popup-cta:hover { border-color: var(--gold); }

/* ---------- Highlights page ---------- */
.highlight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem 1rem; }
.hl-card { background: var(--paper); border: 1px solid var(--cream-ring); border-radius: var(--radius); overflow: hidden; transition: transform .28s var(--ease), box-shadow .28s; }
.hl-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -28px rgba(26,35,50,.4); }
.hl-card .gallery { display: block; }
.hl-card .gallery-item { border-radius: 0; border: 0; aspect-ratio: 4 / 3; }
.hl-card-body { padding: 1rem 1.15rem 1.2rem; }
.hl-date { display: block; font-family: var(--font-mono); font-size: .72rem; color: var(--gold); margin-bottom: .4rem; }
.hl-card-body p { font-size: .92rem; color: var(--ink-mid); line-height: 1.5; }
.hl-card-body strong { color: var(--navy); }

/* ---------- Figure galleries & highlights: responsive (after the components above,
   so these win over the earlier generic breakpoints at the same widths) ---------- */
@media (max-width: 940px) {
  .highlight-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .pub-thumb { grid-column: 2; margin-top: .6rem; }
  .pub-simple li.has-thumb { grid-template-columns: auto 1fr; }
  .pub-simple li.has-thumb .pub-thumb { grid-column: 2; margin-top: .5rem; width: 100px; }
  .news-item.has-gallery { grid-template-columns: 1fr; }
  .news-item .news-thumb { margin-top: .5rem; }
  .news-item .news-thumb .gallery-item { width: 120px; }
  .news-item .news-thumb .gallery-item:not(:first-child) { width: 52px; }
  .highlight-grid { grid-template-columns: 1fr; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .bar { transform: none; }
  [data-reveal] { opacity: 1; transform: none; }
}