/* ---------- Design tokens ---------- */
:root {
  --bg: #fbfaf7;
  --bg-alt: #f2efe9;
  --text: #1e2126;
  --text-muted: #5b6169;
  --accent: #a8543a;
  --accent-dark: #8a4230;
  --border: #e4e1da;
  --shadow: 0 1px 3px rgba(30, 33, 38, 0.06);
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max-width: 760px;
  --radius: 10px;
}

html[data-theme="dark"] {
  --bg: #15181b;
  --bg-alt: #1d2124;
  --text: #e9e7e2;
  --text-muted: #a3a9b0;
  --accent: #e08a6c;
  --accent-dark: #f0a687;
  --border: #2b3034;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s ease, color 0.2s ease;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--text);
  line-height: 1.25;
  margin: 0 0 0.5em 0;
  font-weight: 600;
}

h1 { font-size: 2.1rem; }
h2 { font-size: 1.5rem; margin-top: 2.2em; }
h3 { font-size: 1.15rem; margin-top: 1.6em; color: var(--accent-dark); }
h4 {
  font-family: var(--sans);
  font-size: 0.78rem;
  margin-top: 1.4em;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

p { margin: 0 0 1.1em 0; }

a {
  color: var(--accent-dark);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

a:hover {
  border-bottom-color: currentColor;
}

ul, ol { padding-left: 1.3em; }
li { margin-bottom: 0.4em; }

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

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

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 250, 247, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}

html[data-theme="dark"] .site-header {
  background: rgba(21, 24, 27, 0.88);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  border-bottom: none;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.brand:hover { border-bottom: none; }

nav.menu {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

nav.menu a {
  font-size: 0.92rem;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 6px;
  border-bottom: none;
}

nav.menu a:hover,
nav.menu a.active {
  color: var(--text);
  background: var(--bg-alt);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.theme-toggle:hover { color: var(--text); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 36px;
  height: 32px;
  cursor: pointer;
  color: var(--text);
}

/* ---------- Main content ---------- */
main {
  padding: 48px 0 80px 0;
}

.lede {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Hero on home page */
.hero {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  margin-bottom: 40px;
}

.hero img.avatar {
  width: 152px;
  height: 152px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow);
  flex-shrink: 0;
}

.hero-text h1 { margin-bottom: 0.15em; }

.role {
  color: var(--text-muted);
  font-size: 1.02rem;
  margin-bottom: 1em;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 4px 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--bg-alt);
}

.btn:hover { border-bottom: 1px solid var(--border); background: var(--border); }

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn.primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

/* News / callout card */
.card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 28px 0;
}

.card h3 {
  margin-top: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.card p:last-child { margin-bottom: 0; }

/* Publication entries */
.pub-list { list-style: none; padding-left: 0; margin: 0 0 1.5em 0; }

.pub {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.pub:last-child { border-bottom: none; }

.pub-title { font-weight: 600; }

.pub-meta {
  display: block;
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-top: 2px;
}

/* Timeline-ish sections on research page */
.section-block { margin-bottom: 2.4em; }

/* Video grid for movie pages */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 24px 0;
}

.video-wrap {
  position: relative;
  width: 100%;
  padding-top: 75%;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-alt);
}

.video-wrap iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 0;
}

.video-caption {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Outreach photo */
.photo-figure { margin: 24px 0; }
.photo-figure img { border-radius: var(--radius); box-shadow: var(--shadow); }
.photo-figure figcaption {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* Contact */
.address { color: var(--text); font-style: normal; line-height: 1.9; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px 0;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
}

.site-footer a {
  color: var(--text-muted);
  max-width: 100%;
  overflow-wrap: anywhere;
}
.site-footer a:hover { color: var(--text); }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }

  nav.menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 24px 16px 24px;
  }

  nav.menu.open { display: flex; }

  nav.menu a { padding: 10px 4px; }

  .hero { flex-direction: column; align-items: flex-start; }

  .hero img.avatar { width: 112px; height: 112px; }

  h1 { font-size: 1.7rem; }
}