/* Behavioural Ecology and Data Science Lab
   Shared stylesheet — clean, modern, mobile-friendly */

:root {
  --bg: #ffffff;
  --surface: #f6f8f7;
  --ink: #1c2b28;
  --muted: #5a6b66;
  --accent: #1f6f5c;      /* deep teal-green */
  --accent-dark: #14503f;
  --accent-soft: #e5efeb;
  --border: #e2e8e5;
  --max: 1080px;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(20, 40, 35, .08), 0 6px 20px rgba(20, 40, 35, .06);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- Header / nav ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(8px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 66px;
  flex-wrap: wrap;
}
.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: -.01em;
  line-height: 1.2;
}
.brand span { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.nav-links a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-weight: 500;
  font-size: .96rem;
}
.nav-links a:hover { background: var(--accent-soft); color: var(--accent-dark); text-decoration: none; }
.nav-links a.active { color: var(--accent-dark); background: var(--accent-soft); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--accent-soft), #ffffff 70%);
  border-bottom: 1px solid var(--border);
  padding: 56px 0;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 12px;
  letter-spacing: -.02em;
}
.hero p.lead { font-size: 1.15rem; color: var(--muted); margin: 0; max-width: 60ch; }

/* Full-width landscape banner image.
   Drop your photo at assets/img/hero.jpg. Until then, a soft green
   panel shows in its place (nothing breaks). */
.hero.banner {
  padding: 0;
  min-height: 380px;
  background-color: var(--accent-soft);
  background-image:
    linear-gradient(0deg, rgba(20,40,35,.18), rgba(20,40,35,0) 45%),
    url('../assets/img/hero.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
@media (max-width: 720px) { .hero.banner { min-height: 240px; } }

/* Page-level intro heading + lead (used on Home, below the banner) */
main h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 10px;
  letter-spacing: -.02em;
}
p.lead { font-size: 1.15rem; color: var(--muted); margin: 0; max-width: 60ch; }

/* ---------- Sections ---------- */
main { padding: 48px 0 64px; }
section { margin-bottom: 56px; }
h2 {
  font-size: 1.5rem;
  letter-spacing: -.01em;
  margin: 0 0 6px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent-soft);
}
h3 { font-size: 1.15rem; margin: 0 0 4px; }
.subtitle { color: var(--accent); font-weight: 600; margin: 0 0 12px; font-size: .98rem; }

/* ---------- Home intro ---------- */
.intro-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 40px;
  align-items: start;
}
.intro-grid img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.contact-box {
  margin-top: 24px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ---------- People cards ---------- */
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 24px;
}
.person {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  transition: transform .15s ease, box-shadow .15s ease;
}
.person:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.person .avatar {
  width: 88px; height: 88px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: var(--accent-dark); font-size: 1.6rem;
  margin-bottom: 12px;
  border: 3px solid #fff;
  box-shadow: 0 0 0 1px var(--border);
}
img.avatar { padding: 0; }
.person .role {
  display: inline-block;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 20px;
  margin-bottom: 8px;
}
.person .name { font-weight: 700; font-size: 1.02rem; }
.person .blurb { color: var(--muted); font-size: .9rem; margin-top: 4px; }

/* ---------- Research ---------- */
.project {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.project:last-child { border-bottom: 0; }
.project .imgs { display: flex; gap: 14px; flex-wrap: wrap; }
.project .imgs img {
  width: 220px; max-width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  object-fit: cover;
}

/* ---------- Courses ---------- */
.course {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
}
.course .code { color: var(--accent); font-weight: 700; }

/* ---------- Publications ---------- */
.pub-tools { margin-bottom: 24px; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
  font-size: .95rem;
}
.btn:hover { background: var(--accent-dark); text-decoration: none; }
.pub-year {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-dark);
  margin: 28px 0 4px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--accent-soft);
}
.pub-year:first-of-type { margin-top: 8px; }
ul.pubs { list-style: none; margin: 0 0 8px; padding: 0; }
ul.pubs li {
  position: relative;
  padding: 12px 0 12px 20px;
  border-bottom: 1px solid var(--border);
}
ul.pubs li::before {
  content: "";
  position: absolute;
  left: 2px; top: 21px;
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
}
ul.pubs .authors { color: var(--ink); }
ul.pubs .me { font-weight: 400; }
ul.pubs .venue { color: var(--muted); font-style: italic; }
ul.pubs a.dl { font-size: .88rem; font-weight: 600; white-space: nowrap; }

/* ---------- Callout ---------- */
.callout {
  background: var(--accent-soft);
  border-radius: var(--radius);
  padding: 22px 26px;
}
.callout h2 { border: 0; padding: 0; margin-bottom: 8px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 28px 0;
  color: var(--muted);
  font-size: .9rem;
}
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  body { font-size: 16px; }
  .intro-grid { grid-template-columns: 1fr; gap: 24px; }
  .intro-grid img { max-width: 280px; }
  .hero { padding: 40px 0; }
  ul.pubs a.dl { display: inline-block; margin-top: 4px; }
}