:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --primary: #2b6cb0;
  --primary-dark: #17406d;
  --border: #dbe4f0;
  --accent: #e6f1fb;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

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

.container {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 1rem 0;
}

.nav-wrap, .footer-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: #fff;
}

.brand strong, .brand small { display: block; }
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #fff;
  color: var(--primary-dark);
  display: grid;
  place-items: center;
  font-weight: 700;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-nav a {
  color: #fff;
  opacity: 0.9;
}

.site-nav a.active, .site-nav a:hover { opacity: 1; font-weight: 700; }

.page-grid {
  display: grid;
  grid-template-columns: 2.4fr 1fr;
  gap: 1.5rem;
  padding: 2rem 0 3rem;
}

.content-page {
  padding: 2rem 0 3rem;
}

.content-column, .sidebar, .fieldwork-list, .detail-grid {
  display: grid;
  gap: 1.2rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.hero-card {
  background: linear-gradient(135deg, #f7fbff, #eaf4ff);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.4rem;
  font-size: 0.8rem;
}

.hero-card h1, .card h1, .card h2, .card h3 { margin-top: 0; }

.hero-actions, .actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.button {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  font-weight: 600;
}

.button.secondary {
  background: var(--accent);
  color: var(--primary-dark);
  border: 1px solid var(--border);
}

.full-image {
  margin: 1rem 0;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.observation-list { display: grid; gap: 0.8rem; }
.observation-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}
.stack-list {
  padding-left: 1rem;
  margin: 0;
}

.stack-list li { margin-bottom: 0.5rem; }

.org-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.org-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
}

.org-card img, .org-logo {
  width: 120px;
  height: 120px;
  object-fit: contain;
  margin-bottom: 0.8rem;
  border-radius: 12px;
  background: #f8fafc;
  padding: 0.5rem;
}

.org-profile-header {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.info-grid article {
  background: #f8fbff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}

.fieldwork-card {
  display: grid;
  gap: 0.6rem;
}

.fieldwork-details {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.2rem 0.8rem;
}

.fieldwork-details dt { font-weight: 600; }

.fieldwork-head, .section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.badge {
  display: inline-block;
  background: var(--accent);
  color: var(--primary-dark);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.site-footer {
  background: #eff4fa;
  padding: 1.2rem 0;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

@media (max-width: 900px) {
  .page-grid {
    grid-template-columns: 1fr;
  }
  .org-grid, .info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .nav-wrap, .footer-wrap, .fieldwork-head, .section-head, .org-profile-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .site-nav {
    gap: 0.7rem;
  }
  .org-grid, .info-grid {
    grid-template-columns: 1fr;
  }
  .hero-card, .card {
    padding: 1rem;
  }
}