/* EnGeL Research Group — site styles */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,700;1,9..144,500&display=swap');

:root {
  --green-dark: #1f5c3f;
  --green-mid: #2f7a4f;
  --green-light: #6ba86e;
  --ink: #232823;
  --paper: #fafaf7;
  --paper-alt: #f0f3ef;
  --border: #dde3dd;
  --max-width: 1120px;
  --font-display: "Fraunces", "Iowan Old Style", "Georgia", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Georgia", "Iowan Old Style", "Times New Roman", serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--green-dark);
  line-height: 1.2;
  margin-top: 0;
  letter-spacing: -0.01em;
}

h1 { font-weight: 700; font-optical-sizing: auto; }
h3 {
  font-style: italic;
  font-weight: 500;
  color: var(--green-mid);
  font-size: 1.2rem;
  margin-bottom: 6px;
}

a { color: var(--green-mid); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

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

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 12px;
  padding-bottom: 12px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 44px; width: auto; }

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
nav.main-nav a {
  display: inline-block;
  padding: 8px 14px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.95rem;
  color: var(--ink);
  border-radius: 4px;
}
nav.main-nav a:hover, nav.main-nav a.active {
  background: var(--paper-alt);
  color: var(--green-dark);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 10px;
  font-size: 1.1rem;
  cursor: pointer;
}

.hero {
  background: linear-gradient(135deg, var(--green-dark), var(--green-mid));
  color: #fff;
  padding: 64px 0 56px;
}
.hero h1 { color: #fff; font-size: 2.2rem; margin-bottom: 8px; }
.hero p.tagline { font-size: 1.15rem; opacity: 0.92; max-width: 640px; }

main { padding: 48px 0 72px; }
section + section { margin-top: 48px; }

.callout {
  background: var(--paper-alt);
  border-left: 4px solid var(--green-mid);
  padding: 20px 24px;
  border-radius: 4px;
  margin: 32px 0;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
  margin-top: 28px;
}

.team-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.team-card .photo { aspect-ratio: 1 / 1; overflow: hidden; background: var(--paper-alt); }
.team-card .photo img { width: 100%; height: 100%; object-fit: cover; }
.team-card .body { padding: 18px 20px 22px; flex: 1; display: flex; flex-direction: column; }
.team-card h3 {
  font-size: 1.15rem;
  margin-bottom: 2px;
  font-style: normal;
  font-weight: 600;
  color: var(--ink);
}
.team-card .role {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.85rem;
  color: var(--green-mid);
  font-weight: 600;
  margin-bottom: 12px;
}
.team-card .bio { font-size: 0.92rem; color: #4a4f4a; margin-bottom: 14px; }
.team-card .skills {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.78rem;
  color: #6b716b;
  margin-bottom: 14px;
}
.team-card .links {
  display: flex;
  gap: 10px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.8rem;
  flex-wrap: wrap;
}
.team-card .links a { border: 1px solid var(--border); border-radius: 4px; padding: 3px 8px; }

.bio-toggle {
  background: none;
  border: none;
  color: var(--green-mid);
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0;
  text-align: left;
  margin-bottom: 14px;
}

.coming-soon {
  text-align: center;
  padding: 64px 24px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  color: #6b716b;
}

.site-footer {
  background: var(--green-dark);
  color: #dfe9e2;
  padding: 32px 0;
  margin-top: 64px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.88rem;
}
.site-footer a { color: #ffffff; }
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  nav.main-nav { display: none; width: 100%; order: 3; }
  nav.main-nav.open { display: block; }
  nav.main-nav ul { flex-direction: column; gap: 0; }
  .hero h1 { font-size: 1.7rem; }
}

/* ============ Visual upgrade layer ============ */

body { opacity: 0; transition: opacity 0.6s ease; }
body.loaded { opacity: 1; }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1), transform 0.8s cubic-bezier(0.16,1,0.3,1);
  transition-delay: var(--delay, 0s);
}
.reveal.in-view { opacity: 1; transform: none; }

/* Header scroll state */
.site-header {
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 2px 16px rgba(31,92,63,0.12);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
}

/* Nav underline animation */
nav.main-nav a { position: relative; }
nav.main-nav a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--green-mid);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
nav.main-nav a:hover::after,
nav.main-nav a.active::after { transform: scaleX(1); }
nav.main-nav a:hover, nav.main-nav a.active { background: none; }

@media (max-width: 760px) {
  nav.main-nav {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
    display: block;
  }
  nav.main-nav.open { max-height: 400px; }
}

/* Hero v2 */
.hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.hero .hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-size: cover;
  background-position: center;
  animation: kenburns 22s ease-in-out infinite alternate;
}
.hero .hero-bg-video {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
@media (prefers-reduced-motion: reduce) {
  .hero .hero-bg-video { animation: none; }
}
.hero .hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(120deg, rgba(19,58,39,0.92), rgba(47,122,79,0.82));
}
@keyframes kenburns {
  0%   { transform: scale(1.0) translate(0,0); }
  100% { transform: scale(1.12) translate(-1%, -1%); }
}
.hero h1 {
  animation: fadeUp 0.9s cubic-bezier(0.16,1,0.3,1) both;
}
.hero p.tagline {
  animation: fadeUp 0.9s cubic-bezier(0.16,1,0.3,1) both;
  animation-delay: 0.15s;
}
.hero .hero-cta {
  animation: fadeUp 0.9s cubic-bezier(0.16,1,0.3,1) both;
  animation-delay: 0.3s;
  margin-top: 20px;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.btn {
  display: inline-block;
  padding: 11px 24px;
  border-radius: 6px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1.5px solid #fff;
  color: #fff;
  position: relative;
  overflow: hidden;
  transition: color 0.3s ease;
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: #fff;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
  z-index: -1;
}
.btn:hover { color: var(--green-dark); text-decoration: none; }
.btn:hover::before { transform: scaleX(1); }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 24px;
  text-align: center;
  margin: 40px 0;
}
.stat-num {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--green-mid);
  line-height: 1;
}
.stat-label {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.85rem;
  color: #6b716b;
  margin-top: 6px;
}

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 24px;
}
.gallery-item {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 16/9;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16,1,0.3,1);
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-item .caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 14px 16px;
  background: linear-gradient(to top, rgba(0,0,0,0.65), transparent);
  color: #fff;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.85rem;
  transform: translateY(100%);
  transition: transform 0.35s ease;
}
.gallery-item:hover .caption { transform: translateY(0); }

/* Team card hover polish */
.team-card {
  transition: transform 0.35s cubic-bezier(0.16,1,0.3,1), box-shadow 0.35s ease;
}
.team-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 28px rgba(31,92,63,0.14);
}
.team-card .photo img {
  transition: transform 0.5s cubic-bezier(0.16,1,0.3,1);
}
.team-card:hover .photo img { transform: scale(1.06); }

.bio {
  max-height: 4.5em;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

/* ============ Research / Publications typography ============ */

.pub-list, .grants-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
}
.pub-list li, .grants-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.98rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.pub-list li:first-child, .grants-list li:first-child { padding-top: 0; }
.pub-year, .grant-years {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--green-dark);
  font-size: 1.05rem;
  margin-right: 10px;
}
.pub-authors { color: var(--ink); }
.pub-authors strong { color: var(--green-dark); }
.pub-venue { font-style: italic; color: #55604f; }
.grants-list .grant-role { color: #6b716b; font-size: 0.88rem; }
.grants-list .grant-funder { color: #55604f; }
.grants-list .grant-amount {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-weight: 600;
  color: var(--green-mid);
}
.grants-list strong { font-family: var(--font-display); font-weight: 600; }

/* Research theme cards */
.research-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin: 28px 0 40px;
}
.research-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s cubic-bezier(0.16,1,0.3,1), box-shadow 0.35s ease;
}
.research-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 30px rgba(31,92,63,0.14);
}
.research-card-img {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--paper-alt);
}
.research-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.16,1,0.3,1);
}
.research-card:hover .research-card-img img { transform: scale(1.06); }
.research-card-body {
  padding: 22px 24px 26px;
}
.research-card-body h3 {
  margin-bottom: 8px;
}
.research-card-teaser {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--green-mid);
  margin-bottom: 14px;
}
.research-card-body p:not(.research-card-teaser) {
  font-size: 0.92rem;
  color: #444a44;
}

/* Co-supervisor keyword tags */
.cosup-tag {
  display: inline-block;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.72rem;
  color: var(--green-mid);
  background: var(--paper-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1px 9px;
  margin: 0 4px;
  vertical-align: middle;
}

/* Research page intro drop-cap treatment */
.reveal h1 + section p:first-of-type::first-letter,
main .wrap > h1.reveal + p::first-letter {
  font-family: var(--font-display);
  font-size: 3.4em;
  float: left;
  line-height: 0.8;
  padding-right: 8px;
  padding-top: 4px;
  color: var(--green-dark);
  font-weight: 700;
}

/* WormBlog listing */
.blog-list { margin-top: 28px; display: flex; flex-direction: column; gap: 22px; }
.blog-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px 26px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.blog-card:hover { box-shadow: 0 10px 24px rgba(31,92,63,0.1); transform: translateY(-2px); }
.blog-card h2 { font-size: 1.3rem; margin-bottom: 4px; }
.blog-card h2 a { color: var(--green-dark); }
.blog-card h2 a:hover { text-decoration: none; color: var(--green-mid); }
.post-meta {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.82rem;
  color: #8a908a;
  margin: 0 0 10px;
}
article.reveal .post-meta { margin-bottom: 28px; }
.bio.expanded { max-height: 800px; }

/* ============ Past Members / Alumni ============ */

.alumni-intro {
  color: #55604f;
  max-width: 640px;
}
.alumni-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 28px 20px;
  margin-top: 32px;
}
.alumni-card {
  text-align: center;
}
.alumni-card .bio {
  text-align: left;
  font-size: 0.82rem;
  color: #55604f;
  margin: 4px 0 2px;
}
.alumni-card .bio-toggle {
  display: block;
  margin: 0 0 10px;
  font-size: 0.75rem;
}
.alumni-link {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.78rem;
  text-align: left;
}
.alumni-card .photo {
  width: 92px;
  height: 92px;
  margin: 0 auto 10px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--paper-alt);
  border: 2px solid var(--border);
}
.alumni-card .photo.initials {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--green-mid);
  background: linear-gradient(140deg, #eef2ea, #e0e7dd);
  letter-spacing: 0.02em;
}
.alumni-thesis {
  text-align: left;
  font-size: 0.8rem;
  color: #55604f;
  line-height: 1.45;
  margin: 6px 0 2px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.alumni-card .photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(85%);
  transition: filter 0.35s ease, transform 0.35s ease;
}
.alumni-card:hover .photo img {
  filter: grayscale(0%);
  transform: scale(1.06);
}
.alumni-card h3 {
  font-size: 0.95rem;
  font-style: normal;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
}
.alumni-card .alumni-role {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.76rem;
  color: #8a908a;
}
.team-footer-link {
  margin-top: 40px;
  text-align: center;
}
.team-footer-link a {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.9rem;
}

/* ============ Mobile refinements ============ */

@media (max-width: 600px) {
  .wrap { padding: 0 16px; }

  .hero { padding: 44px 0 40px; }
  .hero h1 { font-size: 1.5rem; }
  .hero p.tagline { font-size: 1rem; }

  main { padding: 32px 0 48px; }
  section + section { margin-top: 36px; }

  .stats { grid-template-columns: repeat(2, 1fr); gap: 22px 16px; margin: 28px 0; }
  .stat-num { font-size: 1.7rem; }
  .stat-label { font-size: 0.78rem; }

  .team-grid, .research-cards { gap: 20px; }
  .research-cards { grid-template-columns: 1fr; }
  .team-card .body { padding: 16px 16px 18px; }

  .alumni-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 24px 14px; }

  .gallery-grid { gap: 14px; }

  .pub-list li, .grants-list li { font-size: 0.92rem; padding: 13px 0; }

  .gallery-grid { grid-template-columns: 1fr; }

  .research-card-body { padding: 18px 18px 20px; }
  .research-card-img { aspect-ratio: 16/9; }

  .reveal h1 + section p:first-of-type::first-letter,
  main .wrap > h1.reveal + p::first-letter {
    font-size: 2.4em;
  }

  .cosup-tag { display: block; margin: 3px 0 3px; width: fit-content; }

  .site-footer .wrap { flex-direction: column; gap: 8px; }

  .blog-card { padding: 18px 18px; }
}

/* ============ Publications: impact + findings ============ */

.pub-impact { margin-top: 44px; }
.pub-impact .stats { margin: 0; }
.pub-venues-note {
  margin: 30px auto 0;
  max-width: 760px;
  text-align: center;
  font-size: 0.95rem;
  color: #55604f;
  line-height: 1.7;
}
.pub-venues-note em { color: var(--green-dark); font-style: italic; }

.findings { margin-top: 72px; padding-top: 56px; border-top: 1px solid var(--border); }
.findings h2 { font-size: 1.9rem; }
.findings-intro {
  max-width: 60ch;
  color: #55604f;
  font-size: 1.05rem;
  margin: 16px 0 0;
}
.finding-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 44px;
}
.finding-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 30px 30px 28px;
  transition: transform 0.4s cubic-bezier(0.16,1,0.3,1), box-shadow 0.4s ease;
  transition-delay: var(--delay, 0s);
}
.finding-card:hover { transform: translateY(-5px); box-shadow: 0 14px 30px rgba(31,92,63,0.12); }
.finding-idx {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--green-light);
}
.finding-card h3 {
  font-size: 1.22rem;
  font-style: normal;
  font-weight: 600;
  color: var(--green-dark);
  margin: 10px 0 12px;
  line-height: 1.25;
}
.finding-card p { font-size: 0.94rem; color: #4a4f4a; margin: 0; }
.finding-card p em { font-style: italic; }
.finding-cite {
  display: block;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  color: var(--green-mid);
}
.pub-list-heading { margin-top: 76px; font-size: 1.7rem; }

@media (max-width: 600px) {
  .pub-venues-note { font-size: 0.9rem; }
  .finding-grid { grid-template-columns: 1fr; gap: 18px; }
}

/* ============ Join Us page ============ */

.join-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-top: 28px;
}
.join-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 26px 26px 24px;
  transition: transform 0.4s cubic-bezier(0.16,1,0.3,1), box-shadow 0.4s ease;
}
.join-card:hover { transform: translateY(-4px); box-shadow: 0 12px 26px rgba(31,92,63,0.1); }
.join-card h3 { font-size: 1.2rem; font-style: normal; font-weight: 600; color: var(--green-dark); margin-bottom: 10px; }
.join-card p { font-size: 0.94rem; color: #4a4f4a; margin: 0; }
.join-steps { counter-reset: jstep; list-style: none; padding: 0; margin: 24px 0 0; max-width: 64ch; }
.join-steps li {
  position: relative;
  padding: 0 0 20px 52px;
  color: #3f4a3f;
  line-height: 1.6;
}
.join-steps li::before {
  counter-increment: jstep;
  content: counter(jstep);
  position: absolute;
  left: 0; top: -2px;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--green-dark);
  color: #fff;
  font-family: var(--font-display);
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
}

/* ============ Footer social + alumni "now" ============ */

.footer-social { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-social a {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: #cfe3d6;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.3s ease, border-color 0.3s ease;
}
.footer-social a:hover { color: #fff; border-color: rgba(255,255,255,0.6); text-decoration: none; }

.alumni-now {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.74rem;
  color: var(--green-mid);
  margin-top: 6px;
  line-height: 1.4;
}
.alumni-now strong { font-weight: 600; color: var(--green-dark); }