/* ---------- Tokens ---------- */
:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --fg: #1b1c1e;
  --muted: #5b6067;
  --faint: #8d929a;
  --rule: #e5e2dc;
  --accent: #1d4d86;
  --accent-soft: #edf2f9;
  --status: #8a4a0c;

  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --width: 48rem;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131518;
    --surface: #1a1d21;
    --fg: #e8e6e3;
    --muted: #a4a9b0;
    --faint: #737880;
    --rule: #2b2f35;
    --accent: #93b8ea;
    --accent-soft: #1b2635;
    --status: #e2ad72;
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 400 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent);
  text-underline-offset: 0.18em;
}
a:hover { text-decoration-color: currentColor; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

h1, h2, h3 { margin: 0; }

.wrap {
  max-width: var(--width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.skip {
  position: absolute;
  left: -999px;
}
.skip:focus { left: 1rem; top: 1rem; background: var(--surface); padding: 0.5rem 0.75rem; z-index: 10; }

/* ---------- Header / footer ---------- */
.site-header { border-bottom: 1px solid var(--rule); }

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.site-name {
  font: 600 1.25rem/1.2 var(--serif);
  color: var(--fg);
  text-decoration: none;
}

nav[aria-label="Main"] {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
}
nav[aria-label="Main"] a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.15rem 0;
  border-bottom: 1.5px solid transparent;
}
nav[aria-label="Main"] a:hover { color: var(--fg); }
nav[aria-label="Main"] a[aria-current="page"] { color: var(--fg); border-bottom-color: var(--accent); }

main.wrap { padding-top: 2.75rem; padding-bottom: 4.5rem; }

.site-footer {
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--muted);
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding-top: 1.5rem;
  padding-bottom: 2rem;
}

/* ---------- Home ---------- */
.intro {
  display: grid;
  grid-template-columns: 14.5rem 1fr;
  gap: 2.75rem;
  align-items: start;
}

.headshot {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 6px;
}

.intro h1 {
  font: 600 2.5rem/1.1 var(--serif);
  letter-spacing: -0.01em;
}

.affiliation {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.bio { margin-top: 1.5rem; }
.bio p {
  margin: 0 0 1.1rem;
  font: 400 1.075rem/1.7 var(--serif);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
}

.btn,
.p-link,
.p-links a {
  display: inline-block;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--surface);
  color: var(--fg);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.15s, color 0.15s;
}
.btn { padding: 0.4rem 0.95rem; font-size: 0.9rem; }
.btn:hover,
.p-link:hover,
.p-links a:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Page heads, shared bits ---------- */
.page-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}
.page-head h1 { font: 600 2.1rem/1.15 var(--serif); }

.lede { max-width: 42rem; margin: 1.25rem 0 0; color: var(--muted); }
.note { font-size: 0.875rem; color: var(--muted); margin: 0.75rem 0 0.5rem; }

.paper-section h2,
.list-section h2 {
  font: 600 0.78rem/1.4 var(--sans);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
  margin-top: 3rem;
}

/* ---------- Research ---------- */
.toolbar { display: flex; gap: 0.25rem; }
.toolbar[hidden] { display: none; }
.toolbar button {
  font: 500 0.85rem/1 var(--sans);
  color: var(--muted);
  background: none;
  border: 0;
  padding: 0.4rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
}
.toolbar button:hover { color: var(--accent); background: var(--accent-soft); }

.callout {
  margin-top: 1.75rem;
  padding: 0.9rem 1.1rem;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  font-size: 0.925rem;
}
.callout-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.callout p { margin: 0.3rem 0 0; }

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  margin-top: 1.5rem;
  font-size: 0.9rem;
}
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--accent); }

.paper { border-bottom: 1px solid var(--rule); }

.paper summary,
.paper.static .row {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 1rem 0;
}
.paper summary { list-style: none; cursor: pointer; }
.paper summary::-webkit-details-marker { display: none; }

.chev {
  flex: none;
  width: 1rem;
  height: 1rem;
  margin-top: 0.3rem;
  color: var(--faint);
  transition: transform 0.15s ease;
}
.paper[open] > summary .chev { transform: rotate(90deg); color: var(--accent); }

.p-head {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.p-title {
  font: 600 1.125rem/1.35 var(--serif);
  color: var(--fg);
  transition: color 0.15s;
}
.paper summary:hover .p-title { color: var(--accent); }

.p-meta { font-size: 0.875rem; line-height: 1.5; color: var(--muted); }
.p-meta cite { font-style: italic; }
.p-meta .sep { color: var(--faint); }
.status { color: var(--status); font-weight: 500; }

.p-actions { flex: none; display: flex; gap: 0.4rem; margin-top: 0.15rem; }
.p-link { padding: 0.15rem 0.65rem; font-size: 0.8rem; }

.p-body { padding: 0 0 1.4rem 1.7rem; }

.abstract p {
  margin: 0 0 1rem;
  max-width: 42rem;
  font: 400 1rem/1.65 var(--serif);
}

.p-details {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 0.6rem 1rem;
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.55;
}
.p-details dt { color: var(--muted); font-weight: 500; }
.p-details dd { margin: 0; }

.talks { list-style: none; margin: 0; padding: 0; }
.talks li { display: grid; grid-template-columns: 3rem 1fr; gap: 0.5rem; }
.talks li + li { margin-top: 0.3rem; }
.yr { font-weight: 600; font-variant-numeric: tabular-nums; }

.p-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
}
.p-links a { padding: 0.25rem 0.75rem; font-size: 0.825rem; }

/* ---------- Teaching / media ---------- */
.entries { list-style: none; margin: 0; padding: 0; }
.entries li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.15rem 1.5rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule);
}
.e-title { font: 600 1.075rem/1.35 var(--serif); }
.e-meta { grid-column: 1; font-size: 0.875rem; color: var(--muted); }
.e-terms {
  grid-column: 2;
  grid-row: 1 / span 2;
  max-width: 15rem;
  text-align: right;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---------- Conferences ---------- */
.cards { display: grid; gap: 1rem; margin-top: 1.25rem; }
.card {
  padding: 1.15rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 8px;
}
.card h3 { font: 600 1.125rem/1.35 var(--serif); }
.card-when { margin: 0.3rem 0 0.9rem; font-size: 0.875rem; font-weight: 500; color: var(--accent); }

.year-group {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule);
}
.year { font: 600 0.95rem/1.6 var(--sans); font-variant-numeric: tabular-nums; }
.plain { list-style: none; margin: 0; padding: 0; }
.plain li { padding: 0.1rem 0; }

/* ---------- Small screens ---------- */
@media (max-width: 640px) {
  main.wrap { padding-top: 2rem; }
  .intro { grid-template-columns: 1fr; gap: 1.5rem; }
  .headshot { max-width: 11rem; }
  .intro h1 { font-size: 2.1rem; }
  .page-head h1 { font-size: 1.8rem; }
  .paper summary, .paper.static .row { flex-wrap: wrap; }
  .p-actions { width: 100%; padding-left: 1.7rem; margin-top: 0.1rem; }
  .p-body { padding-left: 0; }
  .p-details { grid-template-columns: 1fr; gap: 0.2rem; }
  .p-details dd + dt { margin-top: 0.6rem; }
  .entries li { grid-template-columns: 1fr; }
  .e-terms { grid-column: 1; grid-row: auto; max-width: none; text-align: left; }
  .year-group { grid-template-columns: 1fr; gap: 0.25rem; }
}

/* ---------- Print ---------- */
@media print {
  .site-header nav, .toolbar, .toc, .site-footer { display: none; }
  .paper { break-inside: avoid; }
}