/* ── Theme: Burgundy / Warm Serif ────────────────────────────────────────────
   Warm off-white background, light hero with a burgundy rule, Georgia serif
   headings, accent-stripe research cards, tan footer.
   Elegant academic aesthetic — UCSF / Princeton feel.
   Switch to this theme: set  site_theme: burgundy  in _config.yml
   ────────────────────────────────────────────────────────────────────────── */

:root {
  --site-bg: #fdf6ec;
  --site-surface: #fffdf7;
  --site-text: #3a3a3a;
  --site-muted: #8a7a6a;
  --site-dark: #fdf6ec;
  --site-dark-2: #8b1a1a;
  --site-border: #e8dfc8;
  --site-accent: #8b1a1a;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--site-bg);
  color: var(--site-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: var(--site-text);
}

a:hover,
a:focus {
  color: var(--site-accent);
}

p {
  text-align: justify;
  line-height: 1.75;
  font-size: 1.1rem;
}

/* Serif headings throughout */
h1, h2, h3, h4, h5, h6 {
  font-family: Georgia, "Palatino Linotype", Palatino, serif;
}

/* ── Layout shell ── */

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Fixed navbar — warm off-white ── */

#nav-fixed {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  background-color: #f5ede0 !important;
  border-bottom: 1px solid var(--site-border);
}

#nav-fixed.nav-visible {
  opacity: 1;
  pointer-events: auto;
}

#nav-fixed .navbar-brand,
#nav-fixed .nav-link {
  color: var(--site-text) !important;
}

#nav-fixed .nav-link:hover,
#nav-fixed .nav-link:focus {
  color: var(--site-accent) !important;
}

/* ── Hero / masthead — warm light with burgundy rule ── */

.hero-section {
  background: var(--site-dark);
  border-bottom: 2px solid var(--site-accent);
  color: var(--site-text);
  padding: 4.5rem 0 3.5rem;
}

.hero-section .display-3 {
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-family: Georgia, "Palatino Linotype", serif;
  color: var(--site-text);
}

.hero-role {
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
  color: var(--site-muted);
}

/* Dark nav links in light hero */
.hero-section .nav-link,
.hero-section .nav-link:hover,
.hero-section .nav-link:focus {
  color: var(--site-text);
}

.hero-section .nav-link.active {
  color: var(--site-text) !important;
  text-decoration: underline;
}

.hero-section .nav-link:hover,
.hero-section .nav-link:focus {
  color: var(--site-accent);
}

/* Override Bootstrap navbar-dark toggle icon for light background */
.hero-section .navbar-toggler {
  border-color: rgba(0, 0, 0, 0.25);
}

.hero-section .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280%2C 0%2C 0%2C 0.55%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ── Content sections ── */

.content-section {
  scroll-margin-top: 5rem;
  margin-bottom: 3rem;
}

.section-sidebar {
  margin-bottom: 1rem;
}

/* Elegant serif section titles with thin rule below */
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 400;
  font-family: Georgia, "Palatino Linotype", serif;
  color: var(--site-accent);
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--site-accent);
  margin-bottom: 0.75rem;
}

@media (min-width: 992px) {
  .section-body-col {
    border-left: 1px solid var(--site-border);
  }
}

/* ── Research panel cards — burgundy accent-stripe ── */

.research-panel {
  background: var(--site-bg);
  border-radius: 0;
  border: none;
  border-left: 3px solid var(--site-accent);
  box-shadow: 0 1px 4px rgba(139, 26, 26, 0.06);
}

.research-panel .card-body {
  padding: 1.5rem;
}

.research-image {
  width: 100%;
  max-height: 220px;
  object-fit: contain;
  background: var(--site-bg);
  border: 1px solid var(--site-border);
  border-radius: 0;
  padding: 1rem;
}

.research-media-frame-95 {
  height: 95%;
  max-height: none;
  min-height: 300px;
}

/* ── News list ── */

.news-item {
  padding: 0 0 0.75rem;
  margin-bottom: 0.75rem;
  border-color: var(--site-border) !important;
}

.news-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none !important;
}

/* ── Resource / badge links ── */

.resource-link {
  color: var(--site-accent);
  border: 1px solid var(--site-border);
  border-radius: 0.25rem;
  padding: 0.05rem 0.35rem;
  font-size: 0.85em;
  text-decoration: none;
  white-space: nowrap;
  margin-left: 0.25rem;
}

.resource-link:hover,
.resource-link:focus {
  color: var(--site-accent);
  border-color: var(--site-accent);
}

/* ── Footer — warm tan ── */

.site-footer {
  background: #e8dfc8;
  color: var(--site-text);
  border-top: 1px solid var(--site-border);
  margin-top: auto;
  font-size: 0.95rem;
}

.footer-link {
  color: var(--site-text);
  text-decoration: none;
}

.footer-link:hover,
.footer-link:focus {
  color: var(--site-accent);
}

/* ── Pagination ── */

.pagination .page-link {
  color: var(--site-accent);
}

.pagination .page-item.active .page-link {
  background-color: var(--site-accent);
  border-color: var(--site-accent);
}

/* ── Responsive tweaks ── */

@media (max-width: 991.98px) {
  .hero-section {
    padding: 3.5rem 0 2.75rem;
  }
}