@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");

:root {
  --accent: #8b1a2b;
  --accent-dark: #641320;
  --text: #262626;
  --text-muted: #5c5c5c;
  --border: #e3e3e3;
  --bg: #ffffff;
  --bg-alt: #f7f6f4;
  --max-width: 960px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* Header / nav */

#site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 20;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
}

.brand:hover {
  text-decoration: none;
}

.brand-logo {
  height: 68px;
  width: auto;
  display: block;
}

.partner-logo-link {
  display: flex;
  align-items: center;
  padding-left: 20px;
  border-left: 1px solid var(--border);
}

.partner-logo {
  height: 36px;
  width: auto;
  display: block;
}

.site-nav {
  margin-left: auto;
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-link.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  display: block;
}

@media (max-width: 860px) {
  .site-nav {
    display: none;
    order: 3;
    width: 100%;
    flex-direction: column;
    gap: 0;
    margin-top: 12px;
  }

  .site-nav.open {
    display: flex;
  }

  .nav-link {
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 480px) {
  .partner-logo-link {
    display: none;
  }
}

/* Hero */

.hero-banner {
  height: 260px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.hero-banner.hero-photo {
  background-image: url("../assets/geog-building.jpg");
  background-size: cover;
  background-position: center;
}

.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.12) 0, transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.1) 0, transparent 40%);
}

.hero-banner.hero-photo::before {
  background-image: linear-gradient(180deg, rgba(20, 10, 12, 0.15) 0%, rgba(20, 10, 12, 0.55) 100%);
}

.hero-banner .wrap {
  position: relative;
  padding-bottom: 20px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

.hero-tag {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.5);
  padding: 4px 10px;
  border-radius: 3px;
}

/* Intro / page header */

.page-intro {
  padding: 48px 0 8px;
  text-align: center;
}

.page-intro h1 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.page-intro p {
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto;
}

section {
  padding: 32px 0;
}

section + section {
  border-top: 1px solid var(--border);
}

h2 {
  font-size: 1.4rem;
  margin-bottom: 20px;
}

h2.centered {
  text-align: center;
}

/* News list */

.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news-list li {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
}

.news-list li:last-child {
  border-bottom: none;
}

.news-date {
  flex: 0 0 100px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
}

/* Cards (research themes) */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  background: var(--bg-alt);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--accent-dark);
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* People */

.people-category {
  margin-bottom: 36px;
}

.people-category h2 {
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  padding-bottom: 4px;
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 24px;
  margin-top: 18px;
}

.person {
  text-align: center;
}

.avatar-photo {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  margin: 0 auto 10px;
  display: block;
  object-fit: cover;
  background: var(--bg-alt);
  border: 1px solid var(--border);
}

.person-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.person-name a {
  color: var(--text);
}

.person-name a:hover {
  color: var(--accent);
}

.person-role {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.person-note {
  color: var(--text-muted);
  font-size: 0.78rem;
  font-style: italic;
}

/* Join / positions */

.position {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 18px;
  margin-bottom: 16px;
}

.position h3 {
  margin: 0 0 6px;
}

.video-embed {
  position: relative;
  padding-top: 56.25%;
  margin-top: 12px;
  border-radius: 6px;
  overflow: hidden;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Footer */

#site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding: 32px 0 20px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: right;
}

.footer-credit {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-top: 24px;
}

.footer-credit code {
  background: rgba(0, 0, 0, 0.05);
  padding: 1px 5px;
  border-radius: 3px;
}

@media (max-width: 600px) {
  .footer-inner {
    flex-direction: column;
  }

  .footer-links {
    text-align: left;
  }
}