/* ------------------------------------------------------------------
   Colours and fonts live here as variables: change one line to
   re-theme the whole page. The dark block follows the visitor's
   system setting automatically; no toggle, no JavaScript.
   ------------------------------------------------------------------ */
:root {
  --bg: #fcfbf8;
  --text: #1d1d1b;
  --muted: #5e5c57;
  --accent: #1d4f7a;        /* deep harbour blue */
  --accent-hover: #2f6a9c;
  --rule: #e4e0d8;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17191c;
    --text: #e7e4de;
    --muted: #a19d95;
    --accent: #8fb9e0;
    --accent-hover: #b3d1ec;
    --rule: #33363b;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 2px; }

/* ---------- Layout: fixed-width sidebar + flexible main column ---------- */
.page {
  max-width: 1040px;
  margin: 0 auto;
  padding: 64px 32px 48px;
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 72px;
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: sticky;       /* stays in view while the main column scrolls */
  top: 64px;
  align-self: start;
  font-family: var(--sans);
}

.photo {
  display: block;
  width: 100%;
  max-width: 180px;       /* source is 648px, so sharp on Retina up to ~320px */
  aspect-ratio: 1 / 1;
  object-fit: cover;      /* crops rather than squashes a non-square photo */
  border-radius: 6px;
  margin-bottom: 24px;
}

.sidebar h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.75rem;
  line-height: 1.2;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.sidebar p { margin: 0; }
.role { font-size: 1rem; }
.inst { font-size: 1rem; color: var(--muted); }

.market {
  margin-top: 16px !important;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.buttons { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 24px; }

.btn {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
}
.btn:hover {
  background: var(--accent);
  color: var(--bg);
  text-decoration: none;
}

.contact {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.5;
}
.contact li + li { margin-top: 10px; }

/* ---------- Main column ---------- */
main { min-width: 0; }     /* lets long words wrap instead of widening the grid */

section + section { margin-top: 48px; }

.lead { margin-top: 0; }

h2 {
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

.paper + .paper { margin-top: 28px; }

.paper h3 {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 4px;
}
.paper h3 a { color: var(--text); }
.paper h3 a:hover { color: var(--accent); }

.meta { color: var(--muted); font-size: 0.95rem; margin: 0 0 4px; }

/* Native <details>/<summary>: collapsible abstracts with no JavaScript. */
details { margin-top: 6px; }
summary {
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  list-style: none;
  width: fit-content;
}
summary::-webkit-details-marker { display: none; }
summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  transition: transform 0.15s ease;
}
details[open] > summary::before { transform: rotate(90deg); }
details p { margin: 8px 0 0; color: var(--text); }

ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li + li { margin-top: 8px; }
ul.teaching li + li { margin-top: 14px; }
.teaching .meta { display: block; margin: 0; }   /* convenor + years on their own line */
.awards { margin: 18px 0 0; }

footer {
  margin-top: 64px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--muted);
}

/* ---------- TODO markers: impossible to miss, delete before publishing ---------- */
.todo {
  background: #fff3a3;
  color: #5a4a00;
  outline: 1px dashed #c9a800;
  padding: 0 3px;
  border-radius: 2px;
}

/* ---------- Narrow screens: stack sidebar above content ---------- */
@media (max-width: 760px) {
  body { font-size: 16px; }
  .page {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 32px 16px 32px;
  }
  .sidebar { position: static; }
  .photo { max-width: 140px; }
}