/* Colour tokens. Page tint is taken from the wall in the portrait, the accent
   from the olive shirt. Figures sit on white panels in both themes. */
:root {
  --bg: #eef0f0;
  --ink: #1c2226;
  --muted: #5d6468;
  --rule: #d6dadb;
  --link: #4d5a22;
  --link-hover: #2f3814;
  --panel-shadow: 0 1px 2px rgba(20, 30, 35, 0.08), 0 2px 10px rgba(20, 30, 35, 0.06);
  --figure-bg: #ffffff;
  --measure: 40rem;
  --wide: 56rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151a1d;
    --ink: #e4e8ea;
    --muted: #9ca5aa;
    --rule: #2b3337;
    --link: #b3c27a;
    --link-hover: #d3dea4;
    --panel-shadow: none;
  }
}

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

html {
  font-size: 118.75%; /* 19px: Newsreader sets small */
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  font-optical-sizing: auto;
  line-height: 1.6;
  font-feature-settings: "kern", "liga", "onum";
}

a { color: var(--link); text-decoration-thickness: 0.06em; text-underline-offset: 0.18em; }
a:hover { color: var(--link-hover); }
a:focus-visible, summary:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
  border-radius: 2px;
}
cite { font-style: italic; }

/* Header */
.site-header {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 1.4rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}
.site-name {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
}
.site-header nav { display: flex; gap: 1.5rem; }
.site-header nav a { color: var(--muted); text-decoration: none; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--ink); }
.site-header nav a[aria-current="page"] { text-decoration: underline; text-underline-offset: 0.3em; }

main {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 1.5rem 5rem;
}

/* Home */
.intro {
  padding: 3.5rem 0 2rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2.5rem;
  align-items: end;
  max-width: var(--wide);
}
.portrait {
  width: 15rem;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  display: block;
  box-shadow: var(--panel-shadow);
}
.intro h1 {
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 1.2rem;
}
.role { margin: 0; color: var(--muted); font-size: 1.05rem; line-height: 1.45; }
.fields { margin: 0.6rem 0 0; font-size: 1.05rem; line-height: 1.45; color: var(--ink); }
.bio, .block { max-width: var(--measure); }
.bio p { margin: 0 0 1.1em; }
.block { margin-top: 2.8rem; }
.block h2 {
  display: inline-block;
  padding-bottom: 0.15rem;
  border-bottom: 2px solid var(--link);
}
.block h2, .papers h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0 0 0.6rem;
}
.block p { margin: 0 0 0.6em; }
.profiles { display: flex; flex-wrap: wrap; gap: 0.4rem 1.5rem; }

/* Research */
.page-title {
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 3rem 0 0.5rem;
}
.papers { margin-top: 2.5rem; }
.papers h2 { padding-bottom: 0.5rem; border-bottom: 2px solid var(--link); }
.paper-list { list-style: none; margin: 0; padding: 0; }
.paper {
  display: grid;
  grid-template-columns: 12rem minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--rule);
}
.paper.no-figure .paper-text { grid-column: 2; }
.figure {
  display: block;
  aspect-ratio: 16 / 10;
  background: var(--figure-bg);
  box-shadow: var(--panel-shadow);
  padding: 0.35rem;
}
.figure img { width: 100%; height: 100%; object-fit: contain; display: block; }
.paper-text h3 {
  font-size: 1.02rem;
  font-weight: 500;
  line-height: 1.35;
  margin: 0 0 0.4rem;
}
.paper-text h3 a { color: var(--ink); text-decoration-color: var(--rule); }
.paper-text h3 a:hover { color: var(--link); text-decoration-color: currentColor; }
.authors, .venue { margin: 0; color: var(--muted); font-size: 0.9rem; line-height: 1.4; }
.venue { margin-top: 0.15rem; }
.summary { margin: 0.6rem 0 0; max-width: var(--measure); }
.section-note { margin: 0.9rem 0 0; color: var(--muted); font-size: 0.95rem; }
.extras { margin-top: 0.6rem; font-size: 0.95rem; display: flex; flex-wrap: wrap; gap: 0.3rem 1.25rem; align-items: baseline; }
details { flex-basis: 100%; order: 2; }
details[open] { margin-top: 0.4rem; }
summary { cursor: pointer; color: var(--link); width: max-content; }
details p { margin: 0.5rem 0 0; color: var(--ink); max-width: var(--measure); }

.compact-list { list-style: none; margin: 0; padding: 0; }
.compact-list li { padding: 0.9rem 0; border-bottom: 1px solid var(--rule); }
.c-title { display: block; font-weight: 500; line-height: 1.35; }
.c-title a { color: var(--ink); text-decoration-color: var(--rule); }
.c-title a:hover { color: var(--link); text-decoration-color: currentColor; }
.c-meta { display: block; margin-top: 0.2rem; color: var(--muted); font-size: 0.95rem; line-height: 1.45; }

/* Topic filters */
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.25rem 0 0.5rem; }
.filters[hidden] { display: none; }
.filters button {
  font: inherit; font-size: 0.9rem; line-height: 1.2;
  padding: 0.4rem 0.8rem; border-radius: 999px; cursor: pointer;
  color: var(--ink); background: transparent; border: 1px solid var(--rule);
}
.filters button:hover { border-color: var(--link); color: var(--link); }
.filters button[aria-pressed="true"] { background: var(--link); border-color: var(--link); color: var(--bg); }
.filters button:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }
.paper-list > li[hidden], section.papers[hidden] { display: none; }

@media (max-width: 44rem) {
  html { font-size: 106.25%; }
  .site-header { padding: 1.1rem 1.25rem; }
  main { padding: 0 1.25rem 4rem; }
  .intro { padding-top: 1.5rem; grid-template-columns: 1fr; gap: 1.25rem; }
  .portrait { width: 8.5rem; order: -1; }
  .paper { grid-template-columns: 7.5rem minmax(0, 1fr); gap: 0.9rem; padding: 0.9rem 0; }
  .figure { padding: 0.2rem; }
  .paper.has-summary { grid-template-columns: 1fr; }
  .paper.no-figure .paper-text { grid-column: 1; }
}