/* ==========================================================================
   ECRN-OWC website — shared stylesheet
   Design direction: soft, modern, light. Teal/indigo accents on off-white.
   ========================================================================== */

:root {
  /* Color tokens */
  --bg:            #f7f9fc;
  --bg-elev:       #ffffff;
  --bg-soft:       #eef3f9;
  --ink:           #0b1d3a;
  --ink-2:         #334155;
  --ink-3:         #64748b;
  --line:          #e2e8f0;
  --accent:        #0ea5b7;   /* soft teal */
  --accent-deep:   #0a7d8c;
  --accent-2:      #6366f1;   /* indigo */
  --accent-warm:   #f59e0b;
  --shadow-sm:     0 1px 2px rgba(15, 23, 42, .04), 0 1px 3px rgba(15, 23, 42, .06);
  --shadow-md:     0 4px 12px rgba(15, 23, 42, .06), 0 2px 4px rgba(15, 23, 42, .04);
  --shadow-lg:     0 20px 40px rgba(15, 23, 42, .08), 0 6px 12px rgba(15, 23, 42, .04);

  /* Radii — kept small for a formal, architectural feel */
  --r-sm: 2px;
  --r-md: 3px;
  --r-lg: 4px;
  --r-pill: 3px;

  /* Layout */
  --max:   1200px;
  --gutter: clamp(1rem, 4vw, 2rem);

  /* Typography — IBM Plex pair: Serif for display, Sans for UI/body.
     Conveys research/technical formality while staying readable. */
  --ff-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --ff-display: "IBM Plex Serif", "Source Serif 4", Georgia, "Times New Roman", serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--ff-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-deep); text-decoration: none; }
a:hover { color: var(--accent); }
button { font: inherit; cursor: pointer; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--ff-display);
  color: var(--ink);
  letter-spacing: -0.005em;
  line-height: 1.18;
  margin: 0 0 .6em;
  font-weight: 600;
}
h1 { font-size: clamp(2rem, 4vw + 1rem, 3.2rem); font-weight: 600; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.55rem, 1.8vw + 1rem, 2.2rem); }
h3 { font-size: 1.2rem; font-weight: 600; }
p  { margin: 0 0 1em; }
.lede { font-size: 1.1rem; color: var(--ink-2); max-width: 62ch; line-height: 1.6; }
.eyebrow {
  display: inline-block;
  font-family: var(--ff-sans);
  font-size: .76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--accent-deep);
  margin-bottom: 1rem;
}

/* ---------- Layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section-tight { padding: clamp(2rem, 5vw, 3.5rem) 0; }
.grid { display: grid; gap: 1.25rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .85rem 1.4rem;
  border-radius: var(--r-pill);
  font-family: var(--ff-sans);
  font-weight: 500;
  font-size: .95rem;
  letter-spacing: .01em;
  border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { background: var(--bg-elev); border-color: transparent; box-shadow: var(--shadow-sm); }
.btn-arrow::after { content: "→"; font-size: 1rem; transition: transform .2s ease; }
.btn:hover .btn-arrow::after, .btn-arrow:hover::after { transform: translateX(3px); }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 249, 252, .82);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  color: var(--ink);
  line-height: 0;
}
.brand:hover { color: var(--ink); }
.brand-logo {
  height: 46px;
  width: auto;
  display: block;
}
.brand-footer .brand-logo {
  height: 60px;
  background: #fff;
  padding: 10px 14px;
  border-radius: 0;
  box-shadow: var(--shadow-md);
}
@media (max-width: 540px) {
  .brand-logo { height: 38px; }
}

.nav-links {
  display: none;
  list-style: none;
  margin: 0; padding: 0;
  gap: .25rem;
  align-items: center;
}
@media (min-width: 880px) { .nav-links { display: flex; } }
.nav-links a {
  color: var(--ink-2);
  font-weight: 500;
  font-size: .95rem;
  padding: .5rem .85rem;
  border-radius: var(--r-sm);
  transition: background .15s ease, color .15s ease;
}
.nav-links a:hover { background: var(--bg-soft); color: var(--ink); }
.nav-links a.is-current {
  color: var(--accent-deep);
  background: rgba(14, 165, 183, .08);
}
.nav-links .has-children { position: relative; }
.nav-links .has-children > a::after { content: "▾"; font-size: .65rem; margin-left: .3rem; opacity: .6; }
.dropdown {
  position: absolute;
  top: calc(100% + .25rem); left: 0;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  padding: .5rem;
  min-width: 240px;
  list-style: none;
  margin: 0;
  opacity: 0; visibility: hidden;
  transform: translateY(-4px);
  transition: opacity .15s ease, transform .15s ease, visibility .15s;
}
.has-children:hover .dropdown,
.has-children:focus-within .dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.dropdown a { display: block; padding: .55rem .8rem; border-radius: var(--r-sm); }

.nav-cta { display: none; }
@media (min-width: 880px) { .nav-cta { display: inline-flex; } }

.nav-toggle {
  display: inline-grid; place-items: center;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  border-radius: var(--r-sm);
}
@media (min-width: 880px) { .nav-toggle { display: none; } }
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: ""; display: block;
  width: 18px; height: 2px;
  background: var(--ink); border-radius: 2px;
  transition: transform .2s ease, top .2s ease, opacity .15s ease;
}
.nav-toggle span { position: relative; }
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after  { position: absolute; top:  6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { top: 0; transform: rotate(-45deg); }

.mobile-menu {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--bg-elev);
  padding: 1rem var(--gutter) 1.5rem;
}
.mobile-menu.is-open { display: block; }
.mobile-menu ul { list-style: none; padding: 0; margin: 0; }
.mobile-menu > ul > li { border-bottom: 1px solid var(--line); }
.mobile-menu > ul > li:last-child { border-bottom: 0; }
.mobile-menu a { display: block; padding: .8rem 0; color: var(--ink); font-weight: 500; }
.mobile-menu .sub { padding-left: 1rem; padding-bottom: .5rem; }
.mobile-menu .sub a { padding: .4rem 0; color: var(--ink-2); font-weight: 400; font-size: .95rem; }

/* ---------- Hero (homepage, full-bleed image with overlay) ---------- */
.hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  min-height: clamp(460px, 70vh, 640px);
  display: grid;
  align-items: end;
}
.hero-image, .hero-overlay { grid-area: 1 / 1; min-width: 0; }
.hero-image {
  position: relative;
  width: 100%;
  height: 100%;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}
.hero-overlay {
  position: relative;
  width: 100%;
  display: flex;
  align-items: flex-end;
  background:
    linear-gradient(180deg, rgba(11, 29, 58, 0.05) 0%, rgba(11, 29, 58, 0.35) 45%, rgba(11, 29, 58, 0.85) 100%);
  padding-block: clamp(4rem, 10vw, 7rem) clamp(2.5rem, 6vw, 4rem);
  color: #fff;
}
.hero-overlay .container { width: 100%; }
.hero-overlay .eyebrow { color: #a5e8f0; }
.hero-overlay h1 {
  color: #fff;
  max-width: 22ch;
  text-shadow: 0 2px 18px rgba(0,0,0,.35);
}
.hero-overlay .lede {
  color: rgba(255,255,255,.92);
  max-width: 56ch;
  font-size: 1.12rem;
  text-shadow: 0 1px 8px rgba(0,0,0,.35);
}
.hero-cta {
  display: flex; flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.8rem;
}
.hero-overlay .btn-ghost {
  background: rgba(255,255,255,.1);
  color: #fff;
  border-color: rgba(255,255,255,.35);
  backdrop-filter: blur(8px);
}
.hero-overlay .btn-ghost:hover { background: rgba(255,255,255,.2); border-color: rgba(255,255,255,.6); }

.hero-meta {
  display: flex; flex-wrap: wrap;
  gap: 1.5rem 3rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,.2);
  color: #fff;
}
.hero-meta dt { font-family: var(--ff-display); font-size: 1.7rem; font-weight: 600; color: #fff; letter-spacing: -0.01em; line-height: 1; }
.hero-meta dd { margin: .25rem 0 0; font-size: .82rem; color: rgba(255,255,255,.75); text-transform: uppercase; letter-spacing: .1em; }

/* ---------- Inner-page hero (small) ---------- */
.page-hero {
  background:
    linear-gradient(180deg, var(--bg-elev) 0%, var(--bg-soft) 100%);
  border-bottom: 1px solid var(--line);
  padding: clamp(3rem, 7vw, 5rem) 0 clamp(2.5rem, 5vw, 3.5rem);
  position: relative;
}
.page-hero::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: .35;
}
.page-hero h1 { max-width: 22ch; margin-bottom: .4em; }
.page-hero .lede { font-size: 1.15rem; max-width: 64ch; }
.crumbs {
  font-family: var(--ff-sans);
  font-size: .82rem;
  color: var(--ink-3);
  margin-bottom: 1rem;
  letter-spacing: .04em;
}
.crumbs a { color: var(--ink-3); }
.crumbs a:hover { color: var(--accent-deep); }
.crumbs span[aria-hidden] { margin: 0 .5rem; opacity: .6; }

/* Photo grid (squared corners, no rounding) */
.photo-grid {
  display: grid;
  gap: 1.5rem;
}
@media (min-width: 760px) {
  .photo-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
.photo-tile {
  margin: 0;
  border-radius: 0;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  transition: transform .25s ease, box-shadow .25s ease;
}
.photo-tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.photo-tile img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0;
}
.photo-tile figcaption {
  padding: .85rem 1rem;
  font-family: var(--ff-sans);
  font-size: .85rem;
  color: var(--ink-3);
  border-top: 1px solid var(--line);
}

/* ---------- Cards ---------- */
.cards { display: grid; gap: 1.5rem; }
@media (min-width: 640px) { .cards.cols-2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 880px) { .cards.cols-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 880px) { .cards.cols-4 { grid-template-columns: repeat(4, 1fr); } }

.card {
  position: relative;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 1.6rem;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  display: flex; flex-direction: column;
  gap: .6rem;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: transparent; }
.card h3 { margin: 0; }
.card p { color: var(--ink-2); margin: 0; font-size: .95rem; }
.card-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(14, 165, 183, .15), rgba(99, 102, 241, .15));
  color: var(--accent-deep);
  margin-bottom: .4rem;
}
.card-icon svg { width: 22px; height: 22px; }
.card-link {
  display: inline-flex; align-items: center; gap: .35rem;
  margin-top: auto;
  padding-top: .8rem;
  font-weight: 600; font-size: .9rem;
  color: var(--accent-deep);
}
.card-link::after { content: "→"; transition: transform .2s ease; }
.card:hover .card-link::after { transform: translateX(3px); }

.card-tag {
  position: absolute; top: 1rem; right: 1rem;
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: .25rem .6rem;
  border-radius: var(--r-pill);
  background: var(--bg-soft);
  color: var(--ink-3);
}
.card-tag.is-active { background: rgba(14, 165, 183, .12); color: var(--accent-deep); }

/* ---------- Section heads ---------- */
.section-head { max-width: 720px; margin-bottom: 2.5rem; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head + * { margin-top: 0; }

/* ---------- About / mission strip ---------- */
.mission {
  background: linear-gradient(180deg, var(--bg-elev) 0%, var(--bg-soft) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.mission-grid {
  display: grid; gap: 2.5rem;
  align-items: center;
}
@media (min-width: 880px) { .mission-grid { grid-template-columns: 1fr 1.1fr; gap: 4rem; } }
.mission-stats {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(2, 1fr);
}
.stat {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 1.1rem 1.2rem;
}
.stat strong { display: block; font-size: 1.6rem; font-weight: 750; color: var(--ink); letter-spacing: -0.02em; }
.stat span { font-size: .85rem; color: var(--ink-3); }

/* ---------- CTA strip ---------- */
.cta-strip {
  background: linear-gradient(135deg, #0b1d3a 0%, #0a7d8c 100%);
  color: #fff;
  border-radius: 0;
  padding: clamp(2rem, 5vw, 3.5rem);
  display: grid; gap: 1.5rem;
  align-items: center;
}
@media (min-width: 760px) { .cta-strip { grid-template-columns: 1.5fr auto; } }
.cta-strip h2 { color: #fff; margin: 0; }
.cta-strip p { color: rgba(255,255,255,.8); margin: .4rem 0 0; }
.cta-strip .btn-ghost { color: #fff; border-color: rgba(255,255,255,.3); background: rgba(255,255,255,.06); }
.cta-strip .btn-ghost:hover { background: rgba(255,255,255,.14); }

/* ---------- Footer ---------- */
.site-footer {
  background: #0b1d3a;
  color: rgba(255,255,255,.7);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}
.site-footer h4 {
  color: #fff;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 600;
  margin-bottom: 1rem;
}
.footer-grid {
  display: grid; gap: 2.5rem;
  grid-template-columns: 1.4fr repeat(3, 1fr);
}
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: .5rem; }
.site-footer a { color: rgba(255,255,255,.7); font-size: .92rem; }
.site-footer a:hover { color: #fff; }
.site-footer .brand { color: #fff; }
.site-footer .brand-name span { color: rgba(255,255,255,.55); }
.footer-meta {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,.1);
  display: flex; flex-wrap: wrap; gap: 1rem;
  justify-content: space-between;
  font-size: .85rem;
  color: rgba(255,255,255,.55);
}

/* ---------- Utilities ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.muted { color: var(--ink-3); }
.center { text-align: center; }

/* Reveal-on-scroll (set by main.js) */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Inner-page content components ---------- */

/* Article-style prose body */
.prose { max-width: 70ch; }
.prose p, .prose ul, .prose ol { font-size: 1.04rem; line-height: 1.7; color: var(--ink-2); }
.prose ul, .prose ol { padding-left: 1.4rem; margin: 0 0 1.2em; }
.prose ul li, .prose ol li { margin-bottom: .4em; }
.prose h2 { margin-top: 2.2rem; }
.prose h3 { margin-top: 1.8rem; font-weight: 600; }
.prose blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  background: var(--bg-soft);
  border-left: 3px solid var(--accent);
  font-style: italic;
  color: var(--ink-2);
}

/* Two-column content layout: prose on left, sidebar on right */
.split-layout {
  display: grid;
  gap: 3rem;
}
@media (min-width: 880px) {
  .split-layout { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 4rem; }
}
.sidebar {
  font-family: var(--ff-sans);
}
.sidebar-block {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 1.4rem 1.5rem;
  margin-bottom: 1.2rem;
  border-radius: var(--r-md);
}
.sidebar-block h4 {
  font-family: var(--ff-sans);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--ink-3);
  margin-bottom: .8rem;
}
.sidebar-block p, .sidebar-block li { font-size: .92rem; color: var(--ink-2); margin: 0 0 .4em; }
.sidebar-block ul { list-style: none; padding: 0; margin: 0; }
.sidebar-block ul li + li { margin-top: .4rem; padding-top: .4rem; border-top: 1px dashed var(--line); }

/* Researcher / profile cards */
.profile-grid {
  display: grid; gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 600px) { .profile-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 920px) { .profile-grid { grid-template-columns: repeat(3, 1fr); } }
.profile {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 1.4rem 1.5rem;
  border-radius: var(--r-md);
  display: flex; flex-direction: column;
}
.profile-name { font-family: var(--ff-display); font-size: 1.15rem; font-weight: 600; color: var(--ink); margin-bottom: .15em; }
.profile-role { font-size: .9rem; color: var(--ink-3); margin-bottom: .6em; }
.profile-affil { font-size: .92rem; color: var(--ink-2); }
.profile-flag { font-size: .8rem; font-weight: 600; color: var(--accent-deep); letter-spacing: .04em; margin-bottom: .8em; text-transform: uppercase; }

/* Project / publication list rows */
.row-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.row-list > li {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: .25rem .8rem;
  grid-template-columns: 1fr;
}
@media (min-width: 700px) { .row-list > li { grid-template-columns: 7rem 1fr auto; align-items: baseline; } }
.row-list .row-meta { font-family: var(--ff-sans); font-size: .82rem; color: var(--ink-3); letter-spacing: .04em; text-transform: uppercase; }
.row-list .row-title { font-weight: 500; color: var(--ink); }
.row-list .row-link { font-size: .88rem; color: var(--accent-deep); }
.row-list .row-link::after { content: "→"; margin-left: .35rem; }

/* Topic / lecture-notes outline */
.outline { list-style: none; padding: 0; margin: 2rem 0 0; counter-reset: o; }
.outline > li {
  counter-increment: o;
  padding: 1.1rem 1.4rem 1.1rem 4rem;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  margin-bottom: .8rem;
  background: var(--bg-elev);
}
.outline > li::before {
  content: counter(o, decimal-leading-zero);
  position: absolute; left: 1rem; top: 1rem;
  font-family: var(--ff-display);
  font-weight: 600; font-size: 1.1rem;
  color: var(--accent-deep);
  letter-spacing: -.02em;
}
.outline strong { font-weight: 600; color: var(--ink); display: block; margin-bottom: .15rem; }
.outline span { font-size: .92rem; color: var(--ink-3); }

/* Definition / data list */
.dl-grid { display: grid; gap: .85rem 2rem; grid-template-columns: 1fr; margin: 1.5rem 0; }
@media (min-width: 600px) { .dl-grid { grid-template-columns: 12rem 1fr; } }
.dl-grid dt { font-family: var(--ff-sans); font-size: .82rem; color: var(--ink-3); text-transform: uppercase; letter-spacing: .1em; padding-top: .15rem; }
.dl-grid dd { margin: 0; color: var(--ink); }

/* Contact form */
.form { display: grid; gap: 1.2rem; max-width: 560px; }
.form label { font-family: var(--ff-sans); font-size: .85rem; font-weight: 500; color: var(--ink); display: grid; gap: .35rem; }
.form input, .form textarea, .form select {
  font: inherit;
  font-family: var(--ff-sans);
  padding: .8rem .9rem;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--ink);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.form input:focus, .form textarea:focus, .form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14,165,183,.15);
}
.form textarea { min-height: 130px; resize: vertical; }

/* Force squared corners on every <img> as a safety net */
img { border-radius: 0; }

/* Link with arrow used inline in prose */
.arrow-link { display: inline-flex; align-items: center; gap: .35rem; font-weight: 500; }
.arrow-link::after { content: "→"; transition: transform .2s ease; }
.arrow-link:hover::after { transform: translateX(3px); }

/* Card adjustments for the more squared look */
.card { border-radius: var(--r-md); }
.card-icon { border-radius: 4px; }

/* ---------- Lab cards (research groups) ---------- */
.lab-grid {
  display: grid; gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px)  { .lab-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .lab-grid { grid-template-columns: repeat(3, 1fr); } }
.lab-card {
  border: 1px solid var(--line);
  background: var(--bg-elev);
  display: flex; flex-direction: column;
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.lab-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.lab-card-logo {
  height: 150px;
  display: grid; place-items: center;
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 1rem 1.4rem;
}
.lab-card-logo img { max-height: 100%; max-width: 100%; width: auto; height: auto; object-fit: contain; }
.lab-card-body { padding: 1.3rem 1.5rem 1.5rem; display: flex; flex-direction: column; flex: 1; }
.lab-card h3 { font-size: 1.1rem; margin: 0 0 .15em; }
.lab-card .lab-affil { font-family: var(--ff-sans); font-size: .82rem; color: var(--ink-3); margin-bottom: .9em; letter-spacing: .03em; }
.lab-card .lab-affil strong { color: var(--accent-deep); font-weight: 600; }
.lab-card p { font-size: .92rem; color: var(--ink-2); margin: 0 0 1em; }
.lab-card .arrow-link { margin-top: auto; font-size: .88rem; }

/* Profile photo at top of profile card */
.profile { padding: 0; overflow: hidden; }
.profile-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--bg-soft);
  display: block;
  border-radius: 0;
}
.profile-body { padding: 1rem 1.2rem 1.2rem; display: flex; flex-direction: column; flex: 1; }
.profile-body .profile-flag { margin-top: 0; }
.profile-body .profile-name { font-size: 1.05rem; margin-bottom: .2em; }
.profile-body .profile-affil { font-size: .88rem; line-height: 1.45; }

/* Tighter profile grid for 4-col / dense lists */
.profile-grid.cols-4 { grid-template-columns: 1fr; }
@media (min-width: 540px)  { .profile-grid.cols-4 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 880px)  { .profile-grid.cols-4 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1100px) { .profile-grid.cols-4 { grid-template-columns: repeat(4, 1fr); } }

/* Graduate list (year-grouped, no photos) */
.alumni-section { margin-top: 3rem; }
.alumni-year {
  font-family: var(--ff-display);
  font-weight: 600;
  font-size: 1.4rem;
  color: var(--ink);
  margin: 2rem 0 .8rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--line);
}
.alumni-list { list-style: none; padding: 0; margin: 0; }
.alumni-list li {
  padding: .55rem 0;
  border-bottom: 1px dashed var(--line);
  font-size: .95rem;
  color: var(--ink-2);
}
.alumni-list li:last-child { border-bottom: 0; }
.alumni-list em { font-style: normal; color: var(--ink-3); font-size: .88rem; margin-left: .5rem; }

/* Senior-lead profile card: lab logo at top instead of a portrait */
.lead-card .lead-card-logo {
  height: 130px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  display: grid; place-items: center;
  padding: 1rem 1.4rem;
}
.lead-card .lead-card-logo img {
  max-height: 100%; max-width: 100%; width: auto; height: auto; object-fit: contain;
}
.lead-card .profile-body p:last-child { margin-bottom: 0; }
.lead-card .profile-affil strong { color: var(--accent-deep); display: block; font-weight: 600; margin-bottom: .15em; }

/* ---------- Country tiles (About → ECRN members) ---------- */
.country-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 540px)  { .country-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px)  { .country-grid { grid-template-columns: repeat(3, 1fr); } }
.country-tile {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 1.4rem 1.5rem 1.1rem;
  border-radius: var(--r-md);
  position: relative;
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.country-tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.country-tile::before {
  content: "";
  position: absolute; inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-2) 100%);
  opacity: .85;
}
.country-tile .country-flag {
  font-size: 2rem;
  line-height: 1;
  display: inline-block;
  margin-bottom: .55rem;
}
.country-tile .country-name {
  font-family: var(--ff-display);
  font-weight: 600;
  color: var(--ink);
  font-size: 1.1rem;
  margin: 0 0 .8rem;
  letter-spacing: -0.005em;
}
.country-tile ul { list-style: none; padding: 0; margin: 0; }
.country-tile li {
  padding: .55rem 0;
  border-top: 1px dashed var(--line);
}
.country-tile li:first-child { border-top: 0; padding-top: .2rem; }
.country-tile .uni-name { display: block; color: var(--ink-2); font-weight: 500; font-size: .95rem; line-height: 1.35; }
.country-tile .uni-city { display: block; color: var(--ink-3); font-size: .82rem; margin-top: .15rem; letter-spacing: .02em; }

/* Senior-lead card with real headshot photo (square at top of card) */
.lead-card-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 0;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}

/* Lecture-notes outline: PDF download badge on the right */
.outline > li.has-pdf { padding-right: 5.5rem; }
.outline-pdf {
  position: absolute;
  right: 1rem; top: 50%;
  transform: translateY(-50%);
  padding: .35rem .75rem;
  font-family: var(--ff-sans);
  font-size: .8rem; font-weight: 600;
  letter-spacing: .04em;
  color: var(--accent-deep);
  background: rgba(14,165,183,.08);
  border: 1px solid rgba(14,165,183,.25);
  border-radius: var(--r-sm);
  text-decoration: none;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.outline-pdf::before { content: "↓ "; margin-right: .15rem; }
.outline-pdf:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Dropdown label (non-clickable category divider — used for "Projects" in nav) */
.dropdown-label {
  padding: .55rem .8rem .25rem;
  font-family: var(--ff-sans);
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--ink-3);
  pointer-events: none;
  border-top: 1px solid var(--line);
  margin-top: .35rem;
}
.dropdown-label:first-child { border-top: 0; margin-top: 0; }