/* ============================================================
   Russell Lab — style.css
   Design: light, minimal, Lora headings + Inter body, teal accent
   ============================================================ */

/* --- Custom Properties --- */
:root {
  --bg:           #FFFFFF;
  --bg-soft:      #F8FAFA;
  --bg-muted:     #F1F5F5;
  --text:         #1A1A2E;
  --text-muted:   #6B7280;
  --text-light:   #9CA3AF;
  --accent:       #003E74;
  --accent-hover: #002a52;
  --accent-light: #EBF2F8;
  --border:       #E5E9EA;
  --nav-h:        108px;
  --max-w:        1120px;
  --radius:       8px;
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:    0 4px 16px rgba(0,0,0,0.09), 0 2px 6px rgba(0,0,0,0.05);
  --transition:   0.25s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 17px;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

/* --- Typography --- */
h1, h2, h3, h4, h5 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
}
h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1rem; font-weight: 600; }

p { margin-bottom: 1rem; color: var(--text); }
p:last-child { margin-bottom: 0; }

.text-muted { color: var(--text-muted); }
.text-light { color: var(--text-light); }

/* --- Layout Utilities --- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 0;
}

.section--soft { background: var(--bg); }
.section--muted { background: var(--bg); }

.section-label {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-heading {
  margin-bottom: 0.75rem;
}

.section-subheading {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
}

/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.1rem 2rem 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  position: relative;
}

.nav__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.2;
  color: var(--text);
  text-decoration: none;
}
.nav__logo-name {
  font-family: 'Lora', Georgia, serif;
  font-size: 1.9rem;
  font-weight: 400;
  letter-spacing: 0.12em;
}
.nav__logo-inst {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

.nav__links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  list-style: none;
}
.nav__links a {
  display: block;
  padding: 0.4rem 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}
.nav__links a:hover,
.nav__links a.active {
  color: var(--text);
  background: var(--bg-muted);
}
.nav__links a.active { color: var(--accent); }

.nav__join {
  /* no special treatment — same as other nav links */
}

/* Mobile menu */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
}
.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Hero --- */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: flex-start;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
  background-image: url('../assets/images/contour_map_2_colors.svg');
  background-size: 110% auto;   /* fills width; square image extends below viewport so top is always visible */
  background-position: 5% 0%;  /* anchor to top; slight left-of-centre to frame whitespace region */
  animation: heroDrift 30s ease-in-out infinite;
  transition: background-position 0.15s ease-out;
}

@keyframes heroDrift {
  0%   { background-position: 5% 0%; }
  25%  { background-position: 8% 0%; }
  50%  { background-position: 5% 0%; }
  75%  { background-position: 2% 0%; }
  100% { background-position: 5% 0%; }
}

/* Overlay for readability over background image.
   Adjust opacity (currently 0.7) if image is darker or lighter. */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.75);
  pointer-events: none;
}

/* Interactive contour canvas (js/contours.js) replaces the static background once loaded */
.hero--live {
  background-image: none;
  animation: none;
}
.hero--live::before { display: none; }
.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 3rem 4rem 4rem;
  display: grid;
  grid-template-columns: minmax(0, 560px) minmax(0, 400px);
  justify-content: space-between;
  align-items: center;
  gap: 3rem;
}

/* Soft white wash behind the headline so the lines never compete with the text */
.hero__main { position: relative; }
.hero__main::before {
  content: '';
  position: absolute;
  inset: -3rem -4rem;
  background: radial-gradient(closest-side, rgba(255,255,255,0.92) 55%, rgba(255,255,255,0));
  z-index: -1;
  pointer-events: none;
}

.hero__panel {
  padding: 1.6rem 1.8rem;
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border);
  border-radius: 10px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.6s forwards;
}
.hero__panel-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}
.hero__panel p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
}

/* Variant: panel pinned to the bottom-right corner of the hero, when there's room;
   smaller screens fall back to the side-by-side / stacked layouts */
@media (min-width: 1150px) and (min-height: 700px) {
  .hero--panel-bottom .hero__inner { grid-template-columns: minmax(0, 560px); }
  .hero--panel-bottom .hero__panel {
    position: absolute;
    right: 4rem;
    bottom: 4rem;
    width: 400px;
  }
  .hero--panel-bottom { align-items: stretch; }
  .hero--panel-bottom .hero__inner { position: static; align-content: start; }
  .hero--panel-bottom .hero__panel,
  .hero--panel-bottom .hero__main { z-index: 1; }
}

@media (max-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr;
    padding: 2.5rem 1.5rem 4rem;
    gap: 2.5rem;
  }
}

.hero__eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.1s forwards;
}

.hero__title {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.2s forwards;
}

.hero__title em {
  font-style: normal;
  color: var(--accent);
}

.hero__tagline {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.35s forwards;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.5s forwards;
}


@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(15, 118, 110, 0.3);
}
.btn--outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

/* --- Cards --- */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.5);
  padding: 1.75rem;
  text-align: center;
}
.card__icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.25rem;
}
.card__title { margin-bottom: 0.5rem; font-size: 1.15rem; }
.card__body { font-size: 1rem; color: var(--text-muted); line-height: 1.65; }
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}
.card__link:hover { gap: 0.5rem; }

/* --- Grid Layouts --- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* --- People List --- */
.people-section { margin-bottom: 3.5rem; }
.people-section__title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-light);
  margin-bottom: 0;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.person-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 2rem;
  align-items: start;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: none;
}
.person-row:hover .person-row__name {
  color: var(--accent);
}

.person-row__photo {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--bg-muted);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 1.75rem;
  flex-shrink: 0;
}
.person-row__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.person-row__name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
  transition: color var(--transition);
}
.person-row__role {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.6rem;
}
.person-row__bio {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 600px;
}
.person-row__links {
  display: flex;
  gap: 1rem;
  margin-top: 0.75rem;
}
.person-row__links a {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-light);
  transition: color var(--transition);
}
.person-row__links a:hover { color: var(--accent); }

/* PI row — slightly larger photo */
.person-row--pi {
  grid-template-columns: 140px 1fr;
}
.person-row--pi .person-row__photo {
  width: 140px;
  height: 140px;
  border-radius: 8px;
}
.person-row--pi .person-row__name {
  font-size: 1.3rem;
}
.person-card__bio { font-size: 0.85rem; color: var(--text-muted); }

/* --- Publications --- */
.pub-item {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}
.pub-item:first-child { border-top: 1px solid var(--border); }
.pub-item__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.3rem;
  line-height: 1.4;
}
.pub-item__authors { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0.2rem; }
.pub-item__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.pub-item__journal { font-style: italic; color: var(--accent); }
.pub-item__doi { color: var(--text-light); }
.pub-item__doi:hover { color: var(--accent); }

/* --- News --- */
.news-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}
.news-item:first-child { border-top: 1px solid var(--border); }
.news-item__date {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
  padding-top: 0.15rem;
  min-width: 72px;
}
.news-item__title { font-weight: 600; font-size: 0.95rem; margin-bottom: 0.3rem; }
.news-item__body { font-size: 0.875rem; color: var(--text-muted); }

/* --- Affiliations / Logos strip --- */
.affiliations {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.affiliations__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
}
.affiliations__label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-light);
  font-weight: 600;
  white-space: nowrap;
}
.affiliations__logos {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.affiliations__logo {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  opacity: 0.6;
  transition: opacity var(--transition);
}
.affiliations__logo:hover { opacity: 1; color: var(--text); }

/* --- Page Hero (inner pages) --- */
.page-hero {
  padding: calc(var(--nav-h) + 4rem) 0 2rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.page-hero__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}
.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 0.75rem;
}
.page-hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem; /* adds gap only when a subheading is present */
}

/* --- Research page specific --- */
.research-area {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}
.research-area:nth-child(even) .research-area__image { order: -1; }
.research-area__image {
  aspect-ratio: 4/3;
  background: var(--bg-muted);
  border-radius: calc(var(--radius) * 2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 0.85rem;
  overflow: hidden;
}
.research-area__image img { width: 100%; height: 100%; object-fit: cover; }
.research-area__image--contain { background: #fff; }
.research-area__image--contain img { object-fit: contain; }
.research-area__number {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.research-area__num { margin-right: 0.9rem; opacity: 0.55; }
.research-area__title { margin-bottom: 1rem; font-size: 1.4rem; }
.research-area__body { color: var(--text-muted); font-size: 1.05rem; line-height: 1.75; }

/* --- Resources / Tools --- */
.resource-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.resource-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}
.resource-list li:hover { border-color: var(--accent); }
.resource-list__icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 0.1rem; }
.resource-list__name { font-weight: 600; font-size: 0.9rem; }
.resource-list__desc { font-size: 0.83rem; color: var(--text-muted); }

/* --- Join / Positions --- */
.page-join .section { padding: 3.5rem 0; }
.split {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 3rem;
  align-items: center;
}
@media (max-width: 768px) {
  .split { grid-template-columns: 1fr; gap: 1.5rem; }
}
.position-card {
  padding: 1.75rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.5);
  transition: all var(--transition);
}
.position-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}
.position-card__type {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 0.75rem;
}
.position-card__title { font-size: 1.05rem; margin-bottom: 0.5rem; }
.position-card__body { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 1rem; }

/* --- Photos (LMS images) --- */
.photo { margin: 0; }
.photo img { width: 100%; border-radius: 10px; }
.photo figcaption {
  margin-top: 0.6rem;
  font-size: 0.8rem;
  color: var(--text-light);
}
.photo figcaption a { color: var(--text-light); text-decoration: underline; }

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.contact-detail {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}
.contact-detail__icon {
  width: 36px;
  height: 36px;
  background: var(--accent-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.9rem;
}
.contact-detail__label { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-light); margin-bottom: 0.2rem; }
.contact-detail__value { font-size: 0.9rem; color: var(--text); }

.contact-form { display: flex; flex-direction: column; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.8rem; font-weight: 600; color: var(--text); }
.form-group input,
.form-group textarea,
.form-group select {
  padding: 0.65rem 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.875rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 120px; }

/* --- Footer --- */
.footer {
  background: transparent;
  border-top: 1px solid var(--border);
  padding: 1.25rem 0;
  margin-top: auto;
}
.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-light);
  flex-wrap: wrap;
  gap: 0.75rem;
}
.footer a {
  color: var(--text-light);
  transition: color var(--transition);
}
.footer a:hover { color: var(--text); }
.footer__right {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}
.footer__icon {
  display: flex;
  align-items: center;
  color: var(--text-light);
  transition: color var(--transition);
}
.footer__icon:hover { color: var(--text); }
.footer__icon svg { display: block; }

/* --- Pub loader state --- */
.pub-loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.pub-loading__spinner {
  width: 28px;
  height: 28px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 1rem;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.pub-error {
  padding: 1.5rem;
  background: #FEF2F2;
  border: 1px solid #FCA5A5;
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: #991B1B;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 3.5rem 0; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .research-area { grid-template-columns: 1fr; gap: 2rem; }
  .research-area:nth-child(even) .research-area__image { order: 0; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer__right { gap: 1rem; }
  .person-row,
  .person-row--pi { grid-template-columns: 80px 1fr; gap: 1.25rem; }
  .person-row--pi .person-row__photo { width: 80px; height: 80px; }

  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    gap: 0;
    box-shadow: var(--shadow-md);
  }
  .nav__links.open { display: flex; }
  .nav__links a { padding: 0.7rem 1rem; border-radius: 6px; }
  .nav__burger { display: flex; }
  .nav__join { margin-left: 0; }
}