/* Cayman-inspired clean research portfolio styling */
:root {
  --cayman-a: #159957;
  --cayman-b: #155799;
  --bg: #f6f8fa;
  --card: #ffffff;
  --text: #243447;
  --muted: #607080;
  --border: #dce6f0;
  --link: #155799;
  --shadow: 0 14px 34px rgba(21, 87, 153, 0.10);
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.62;
}
a { color: var(--link); }

.site-hero {
  color: #fff;
  background: linear-gradient(120deg, var(--cayman-a), var(--cayman-b));
  padding: 0 0 48px;
}
.compact-hero { padding-bottom: 38px; }
.navbar {
  width: min(1120px, 92%);
  margin: 0 auto;
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}
.brand {
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.nav-links { display: flex; gap: 18px; flex-wrap: wrap; }
.nav-links a {
  color: rgba(255,255,255,0.92);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
}
.nav-links a:hover { color: #fff; text-decoration: underline; }
.hero-content {
  width: min(980px, 92%);
  margin: 32px auto 0;
  text-align: center;
}
.hero-content.compact { margin-top: 24px; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-size: 0.78rem;
  font-weight: 800;
  color: #159957;
}
.site-hero .eyebrow { color: rgba(255,255,255,0.86); }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.035em; }
h1 { font-size: clamp(2rem, 4vw, 3.35rem); margin: 12px 0 12px; }
h2 { font-size: clamp(1.65rem, 3vw, 2.25rem); margin: 8px 0 16px; }
h3 { font-size: 1.35rem; margin: 6px 0 10px; }
.hero-subtitle { max-width: 770px; margin: 0 auto; color: rgba(255,255,255,0.9); font-size: 1.05rem; }

.section { width: min(1120px, 92%); margin: 0 auto; padding: 38px 0; }
.section-heading { max-width: 760px; margin-bottom: 22px; }
.section-heading.centred { text-align: center; margin-left: auto; margin-right: auto; }
.section-heading p { color: var(--muted); }

.about-card-horizontal, .collection-card, .project-card, .paper-card, .funded-project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.about-card-horizontal {
  display: grid;
  grid-template-columns: minmax(180px, 260px) 1fr;
  gap: 30px;
  padding: 30px;
  align-items: start;
}
.about-photo-column { display: flex; justify-content: center; }
.about-photo {
  width: 100%;
  max-width: 245px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 22px;
  border: 5px solid #fff;
  box-shadow: 0 16px 30px rgba(36, 52, 71, 0.18);
  background: #e7eef5;
}
.about-bio-column h2 { margin-top: 0; }
.about-bio-column p { margin: 0.68rem 0; }

.button-row, .links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 15px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
  border: 1px solid transparent;
}
.button.primary { background: var(--cayman-b); color: #fff; }
.button.secondary { background: #eef6f4; color: #14634a; border-color: #cce9de; }
.button:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(21, 87, 153, 0.14); }

.collection-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.collection-card { padding: 28px; }
.collection-icon { font-size: 2.2rem; margin-bottom: 10px; }
.collection-card p, .project-card p, .paper-card p, .funded-project-card p { color: var(--muted); }

.project-card, .paper-card { padding: 26px; }
.project-list { display: grid; gap: 20px; }
.project-card.featured { display: grid; grid-template-columns: 1fr; }
.meta { color: var(--muted); font-weight: 700; font-size: 0.95rem; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.tags span { background: #eaf7f2; color: #13704f; border-radius: 999px; padding: 6px 10px; font-weight: 800; font-size: 0.78rem; }
.links a { font-weight: 800; text-decoration: none; }
.links a:hover { text-decoration: underline; }

.funded-project-list { display: grid; gap: 22px; }
.funded-project-card { display: grid; grid-template-columns: 230px 1fr; gap: 24px; padding: 22px; align-items: start; }
.project-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: center;
  border-radius: 14px;
  background: #ffffff;
  border: 1px solid var(--border);
  padding: 18px;
}
.project-summary-list { margin: 12px 0 0 0; padding-left: 1.1rem; color: var(--muted); }
.video-box { aspect-ratio: 16 / 9; background: #10243a; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.video-box iframe { width: 100%; height: 100%; border: 0; display: block; }
pre {
  background: #f2f5f8;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
}
.site-footer { text-align: center; color: var(--muted); padding: 30px; border-top: 1px solid var(--border); }

@media (max-width: 820px) {
  .navbar { flex-direction: column; align-items: flex-start; }
  .about-card-horizontal, .collection-grid, .funded-project-card { grid-template-columns: 1fr; }
  .about-photo-column { justify-content: flex-start; }
  .about-photo { max-width: 210px; }
  .section { padding: 30px 0; }
}
/* Poster display for student project pages */
.poster-card {
  overflow: hidden;
}

.project-poster {
  width: 100%;
  max-width: 980px;
  display: block;
  margin: 18px auto 0;
  border-radius: 14px;
  border: 1px solid var(--border);
  box-shadow: 0 14px 34px rgba(21, 87, 153, 0.10);
}
/* === Post-Graduate Researchers feature section === */

.pgr-feature-section {
  width: min(1120px, 92%);
  margin: 0 auto;
  padding: 44px 0 48px;
}

.pgr-banner {
  color: #ffffff;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.18), transparent 34%),
    linear-gradient(120deg, var(--cayman-a), var(--cayman-b));
  border-radius: 24px;
  padding: 38px 34px;
  text-align: center;
  box-shadow: var(--shadow);
  margin-bottom: 28px;
}

.pgr-banner .eyebrow {
  color: rgba(255, 255, 255, 0.86);
  margin-bottom: 8px;
}

.pgr-banner h2 {
  color: #ffffff;
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 8px 0 12px;
}

.pgr-banner p {
  max-width: 780px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.05rem;
}

.pgr-card-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(280px, 1fr));
  gap: 22px;
  align-items: start;
}

.pgr-feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.pgr-feature-card::before {
  content: "";
  display: block;
  height: 5px;
  width: 100%;
  background: linear-gradient(90deg, var(--cayman-a), var(--cayman-b));
  position: absolute;
  top: 0;
  left: 0;
}

.pgr-feature-card-wide {
  grid-column: 1 / -1;
  max-width: 980px;
  justify-self: center;
  width: 100%;
}

.pgr-card-header {
  margin-bottom: 18px;
}

.pgr-card-kicker {
  display: inline-flex;
  align-items: center;
  background: #eef6f4;
  color: #14634a;
  border: 1px solid #cce9de;
  border-radius: 999px;
  padding: 6px 11px;
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.pgr-card-header h3 {
  margin: 6px 0 0;
  font-size: 1.45rem;
}

.pgr-list {
  margin: 0;
  padding-left: 1.35rem;
}

.pgr-list li {
  margin-bottom: 15px;
  padding-left: 6px;
}

.pgr-list li:last-child {
  margin-bottom: 0;
}

.pgr-list li::marker {
  color: var(--cayman-b);
  font-weight: 900;
}

.pgr-list strong {
  display: block;
  color: var(--text);
  font-size: 1.02rem;
  margin-bottom: 3px;
}

.pgr-list span {
  display: block;
  color: var(--muted);
  line-height: 1.45;
}

.past-pgr-list {
  columns: 2;
  column-gap: 36px;
}

.past-pgr-list li {
  break-inside: avoid;
}

@media (max-width: 900px) {
  .pgr-card-stack {
    grid-template-columns: 1fr;
  }

  .pgr-feature-card-wide {
    grid-column: auto;
    max-width: none;
  }

  .past-pgr-list {
    columns: 1;
  }
}

@media (max-width: 560px) {
  .pgr-banner {
    padding: 30px 22px;
  }

  .pgr-feature-card {
    padding: 24px;
  }
}