:root {
  --navy: #0b1f3a;
  --teal: #1fb6a4;
  --coral: #ff6b5c;
  --paper: #f7f9fb;
  --ink: #1a1a1a;
  --muted: #5d6673;
  --line: rgba(11, 31, 58, 0.14);
  --white: #ffffff;
  --shadow: 0 24px 80px rgba(11, 31, 58, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 56px);
  color: var(--white);
  background: linear-gradient(180deg, rgba(11, 31, 58, 0.8), rgba(11, 31, 58, 0));
}

.brand,
.hero h1,
h2,
h3,
.footer-brand {
  font-family: "Space Grotesk", Inter, sans-serif;
}

.brand {
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  gap: clamp(14px, 3vw, 34px);
  font-size: 14px;
  font-weight: 600;
}

.nav a {
  text-decoration: none;
  opacity: 0.86;
}

.nav a:hover {
  color: var(--coral);
  opacity: 1;
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: var(--white);
}

.hero-photo {
  position: absolute;
  inset: 0;
  background: url("images/hero-group-photo.jpg") center / cover;
  transform: scale(1.02);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 28% 30%, rgba(31, 182, 164, 0.36), transparent 28%),
    radial-gradient(circle at 72% 42%, rgba(255, 107, 92, 0.24), transparent 25%),
    linear-gradient(135deg, rgba(11, 31, 58, 0.32), rgba(11, 31, 58, 0.84)),
    linear-gradient(90deg, rgba(11, 31, 58, 0.72), rgba(11, 31, 58, 0.44)),
    linear-gradient(0deg, rgba(11, 31, 58, 0.56), rgba(11, 31, 58, 0.12));
  opacity: 0;
  animation: heroOverlayFadeIn 1s ease forwards;
  animation-delay: 0.9s;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(980px, calc(100% - 36px));
  text-align: center;
  opacity: 0;
  animation: heroContentFadeIn 1s ease forwards;
  animation-delay: 1.15s;
}

@keyframes heroOverlayFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes heroContentFadeIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-overlay,
  .hero-content,
  .hero-dna {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

.hero h1 {
  margin: 0;
  font-size: clamp(58px, 14vw, 166px);
  line-height: 0.88;
  text-transform: uppercase;
}

.hero p {
  margin: 26px auto 0;
  max-width: 780px;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: clamp(13px, 2vw, 18px);
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero-dna {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0;
  pointer-events: none;
  cursor: grab;
  animation: heroOverlayFadeIn 1s ease forwards;
  animation-delay: 0.9s;
}

.hero-dna:active {
  cursor: grabbing;
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  z-index: 2;
  width: 26px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 999px;
}

.scroll-cue span {
  position: absolute;
  left: 50%;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--white);
  animation: scrollDot 1.8s ease-in-out infinite;
}

@keyframes scrollDot {
  0% { transform: translate(-50%, 0); opacity: 1; }
  100% { transform: translate(-50%, 18px); opacity: 0; }
}

.section {
  padding: clamp(74px, 10vw, 126px) 0;
}

.section-inner {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.about-grid,
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.8fr);
  gap: clamp(28px, 6vw, 84px);
  align-items: start;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow-light {
  color: #7fe6d8;
}

h2 {
  margin: 0;
  max-width: 830px;
  font-size: clamp(34px, 5vw, 66px);
  line-height: 1;
}

.lead {
  max-width: 720px;
  margin-top: 26px;
  font-size: clamp(18px, 2vw, 22px);
  color: var(--muted);
}

.pi-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 30px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.pi-panel h3 {
  margin: 0;
  font-size: 30px;
}

.role {
  margin: 4px 0 24px;
  color: var(--coral);
  font-weight: 700;
}

dl,
dd {
  margin: 0;
}

dt {
  margin-top: 18px;
  font-weight: 800;
}

dd {
  color: var(--muted);
}

.divider-helix {
  height: 58px;
  background:
    linear-gradient(90deg, transparent, rgba(31, 182, 164, 0.28), transparent),
    repeating-linear-gradient(115deg, transparent 0 24px, rgba(255, 107, 92, 0.24) 25px 27px, transparent 28px 52px);
}

.projects {
  position: relative;
  overflow: hidden;
  padding: clamp(96px, 13vw, 160px) 0;
  background: linear-gradient(160deg, #0b1f3a 0%, #0e2547 55%, #0a1a30 100%);
  color: var(--white);
}

.projects-dna {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0.85;
  pointer-events: auto;
  cursor: grab;
}

.projects-dna:active {
  cursor: grabbing;
}

.projects-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(circle at 22% 20%, rgba(31, 182, 164, 0.22), transparent 40%),
    radial-gradient(circle at 82% 78%, rgba(255, 107, 92, 0.16), transparent 42%),
    linear-gradient(180deg, rgba(11, 31, 58, 0.55), rgba(11, 31, 58, 0.72));
}

.projects-inner {
  position: relative;
  z-index: 2;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.project-grid article {
  min-height: 200px;
  padding: 30px 28px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  backdrop-filter: blur(6px);
  transition: background 200ms ease, border-color 200ms ease, transform 200ms ease;
}

.project-grid article:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(127, 230, 216, 0.4);
  transform: translateY(-3px);
}

.project-grid h3 {
  margin: 0 0 14px;
  font-size: 26px;
}

.project-grid p {
  margin: 0;
  font-size: 17px;
  color: rgba(255, 255, 255, 0.78);
}

.section-heading {
  display: grid;
  gap: 12px;
  margin-bottom: 36px;
}

.member-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.member-card {
  position: relative;
  min-height: 380px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  overflow: hidden;
  background: var(--navy);
  color: var(--white);
  text-align: left;
  cursor: pointer;
  box-shadow: 0 14px 44px rgba(11, 31, 58, 0.14);
}

.member-photo,
.modal-photo {
  background:
    radial-gradient(circle at 50% 28%, rgba(255, 255, 255, 0.72), transparent 18%),
    linear-gradient(145deg, rgba(31, 182, 164, 0.92), rgba(11, 31, 58, 0.96) 52%, rgba(255, 107, 92, 0.72));
}

.member-photo-frame {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.member-photo {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  transition: transform 420ms ease, opacity 420ms ease;
}

.member-front,
.member-back {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 22px;
  transition: opacity 280ms ease, transform 320ms ease;
}

.member-front {
  background: linear-gradient(0deg, rgba(11, 31, 58, 0.88), rgba(11, 31, 58, 0));
}

.member-back {
  opacity: 0;
  transform: translateY(16px);
  background: linear-gradient(0deg, rgba(11, 31, 58, 0.9), rgba(11, 31, 58, 0.58));
}

.member-card:hover .member-photo,
.member-card:focus-visible .member-photo {
  transform: scale(1.07);
  opacity: 0.3;
}

.member-card:hover .member-back,
.member-card:focus-visible .member-back {
  opacity: 1;
  transform: translateY(0);
}

.member-card:hover .member-front,
.member-card:focus-visible .member-front {
  opacity: 0;
}

.member-name {
  margin: 0;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.15;
}

.member-role {
  margin: 10px 0 0;
  font-size: 16px;
  color: var(--coral);
  font-weight: 800;
}

.member-focus {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.4;
}

.publications {
  background: var(--white);
}

.publication-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 34px 0 0;
  list-style: none;
  counter-reset: pub;
}

.publication-list li {
  counter-increment: pub;
  position: relative;
  padding: 22px 24px 22px 72px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  transition: border-color 180ms ease, transform 180ms ease, background 180ms ease;
}

.publication-list li::before {
  content: counter(pub, decimal-leading-zero);
  position: absolute;
  left: 22px;
  top: 22px;
  color: var(--teal);
  font-family: "Space Grotesk", Inter, sans-serif;
  font-weight: 800;
}

.publication-list li:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 107, 92, 0.48);
  background: var(--white);
}

.gallery {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, var(--paper), rgba(247, 249, 251, 0.72)),
    repeating-linear-gradient(118deg, transparent 0 38px, rgba(31, 182, 164, 0.08) 39px 41px, transparent 42px 78px);
}

.gallery-collage {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  grid-auto-rows: 128px;
  gap: 16px;
  margin-top: 38px;
}

.gallery-tile {
  position: relative;
  min-height: 0;
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background: var(--navy);
  box-shadow: 0 18px 54px rgba(11, 31, 58, 0.16);
  isolation: isolate;
}

.gallery-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(0deg, rgba(11, 31, 58, 0.72), rgba(11, 31, 58, 0.05) 58%);
  opacity: 0.82;
  transition: opacity 220ms ease;
}

.gallery-tile img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: transform 420ms ease, filter 420ms ease;
}

.gallery-tile figcaption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 16px;
  z-index: 2;
  color: var(--white);
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 18px;
  font-weight: 800;
}

.gallery-tile:hover img {
  transform: scale(1.06);
  filter: saturate(1.12);
}

.gallery-tile:hover::after {
  opacity: 0.68;
}

.tile-large {
  grid-column: span 3;
  grid-row: span 3;
}

.tile-wide {
  grid-column: span 3;
  grid-row: span 2;
}

.tile-tall {
  grid-column: span 2;
  grid-row: span 3;
}

.gallery-tile:not(.tile-large):not(.tile-wide):not(.tile-tall) {
  grid-column: span 2;
  grid-row: span 2;
}

.footer {
  padding: 54px 0;
  background: var(--navy);
  color: var(--white);
}

.footer-brand {
  margin: 0 0 8px;
  font-size: 32px;
  font-weight: 800;
  text-transform: uppercase;
}

.footer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
}

address {
  font-style: normal;
  color: rgba(255, 255, 255, 0.82);
}

address a:hover {
  color: var(--coral);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

.modal[aria-hidden="false"] {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(11, 31, 58, 0.78);
  backdrop-filter: blur(12px);
}

.modal-panel {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 30px;
  width: min(880px, 100%);
  max-height: calc(100svh - 36px);
  overflow: auto;
  padding: 26px;
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.modal-photo {
  min-height: 340px;
  border-radius: 8px;
}

.modal-panel h2 {
  font-size: clamp(34px, 5vw, 58px);
}

.outside {
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 1040px) {
  .project-grid,
  .member-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .gallery-collage {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .tile-large,
  .tile-wide {
    grid-column: span 2;
  }

  .tile-tall,
  .gallery-tile:not(.tile-large):not(.tile-wide):not(.tile-tall) {
    grid-column: span 2;
    grid-row: span 2;
  }
}

@media (max-width: 780px) {
  .site-header {
    align-items: flex-start;
    gap: 12px;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 8px;
    font-size: 13px;
  }

  .about-grid,
  .footer-grid,
  .modal-panel {
    grid-template-columns: 1fr;
  }

  .project-grid,
  .member-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .gallery-collage {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-rows: 112px;
    gap: 12px;
  }

  .tile-large,
  .tile-wide,
  .tile-tall,
  .gallery-tile:not(.tile-large):not(.tile-wide):not(.tile-tall) {
    grid-column: span 1;
    grid-row: span 2;
  }

  .tile-large,
  .tile-wide {
    grid-column: span 2;
  }

  .project-grid article {
    min-height: 180px;
  }

  .member-card {
    min-height: 300px;
  }

  .modal-photo {
    min-height: 230px;
  }
}

@media (max-width: 520px) {
  .section-inner {
    width: min(100% - 28px, 1180px);
  }

  .project-grid,
  .member-grid {
    grid-template-columns: 1fr;
  }

  .gallery-collage {
    display: block;
  }

  .gallery-tile {
    height: 260px;
    margin-top: 14px;
  }

  .gallery-tile:first-child {
    margin-top: 0;
  }

  .publication-list li {
    padding: 56px 18px 18px;
  }

  .publication-list li::before {
    left: 18px;
    top: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---- Alumni (names only, small bullets) ---- */
.alumni {
  margin-top: clamp(40px, 5vw, 60px);
  padding-top: clamp(28px, 3vw, 36px);
  border-top: 1px solid var(--line);
}

.alumni-title {
  margin: 0 0 16px;
  color: var(--teal);
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.alumni-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.alumni-list li {
  position: relative;
  padding-left: 18px;
  font-size: 16px;
  color: var(--muted);
}

.alumni-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--coral);
}

.alumni-category {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.6;
}

.alumni-category:last-of-type {
  margin-bottom: 0;
}

/* ---- News ---- */
.news {
  background: var(--white);
}

.news-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.news-item {
  display: grid;
  grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
  gap: clamp(16px, 4vw, 48px);
  padding: 26px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}

.news-item:last-child {
  border-bottom: 1px solid var(--line);
}

.news-date {
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--teal);
}

.news-text {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.5;
  color: var(--ink);
}

@media (max-width: 640px) {
  .news-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}

/* ---- About: heading + PI card on top, research text below ---- */
.about-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
  gap: clamp(28px, 6vw, 84px);
  align-items: start;
}

.about-lead h2 {
  margin-top: 12px;
}

.about-research {
  margin-top: clamp(38px, 5vw, 64px);
  max-width: 1000px;
  columns: 2;
  column-gap: clamp(34px, 5vw, 64px);
}

.about-research p {
  margin: 0 0 18px;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.75;
  color: var(--muted);
}

.about-research p:last-child {
  margin-bottom: 0;
}

@media (max-width: 760px) {
  .about-research {
    columns: 1;
  }
}

/* Smooth reveal (opacity + slight rise only, no layout animation) */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
}

[data-reveal].in-view {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}