/* ==========================================================================
   Tokens
   Cool paper, blue-black ink, one ultramarine accent. Literata for reading,
   IBM Plex Sans for navigation and metadata.
   ========================================================================== */
:root {
  color-scheme: light dark;
  --bg: #f5f6f9;
  --surface: #ffffff;
  --ink: #161a24;
  --ink-soft: #4b5262;
  --line: #d9dce5;
  --accent: #2f3fd0;
  --accent-ink: #ffffff;
  --accent-wash: #e6e9fb;

  --serif: "Literata", Georgia, "Times New Roman", serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.25rem;
  --step-2: 1.625rem;
  --step-3: 2.125rem;

  --measure: 42rem;
  --radius: 6px;
  --gutter: 1.25rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f121a;
    --surface: #171b26;
    --ink: #e8eaf1;
    --ink-soft: #a3aabb;
    --line: #2b3142;
    --accent: #99a6ff;
    --accent-ink: #0f121a;
    --accent-wash: #232a52;
  }
}

/* ==========================================================================
   Base
   ========================================================================== */
[hidden] { display: none !important; }

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 var(--step-0)/1.65 var(--serif);
  overflow-wrap: break-word;
}

img { max-width: 100%; height: auto; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -4rem;
  z-index: 10;
  padding: 0.5rem 0.9rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--sans);
}
.skip-link:focus { top: 0.5rem; }

/* ==========================================================================
   Shell: sticky name-plate rail on wide screens, stacked on narrow ones
   ========================================================================== */
.shell { min-height: 100vh; }

.column { min-width: 0; display: flex; flex-direction: column; min-height: 100vh; }

main {
  flex: 1;
  width: 100%;
  max-width: calc(var(--measure) + 2 * var(--gutter));
  padding: 1.5rem var(--gutter) 3rem;
}

@media (min-width: 64rem) {
  .shell { display: grid; grid-template-columns: 17rem minmax(0, 1fr); }
  main { padding: 4.5rem 3rem 4rem; max-width: calc(var(--measure) + 6rem); }
  .page-publications main,
  .page-lab main,
  .page-research main { max-width: 64rem; }
}

/* ==========================================================================
   Header, nav, social
   ========================================================================== */
.site-header {
  padding: 1.1rem var(--gutter) 0;
  font-family: var(--sans);
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.25rem 1rem;
}

.brand {
  font: 600 1.1rem/1.2 var(--serif);
  color: var(--ink);
  text-decoration: none;
}

.social {
  display: flex;
  gap: 0.15rem;
  margin: 0 -0.5rem 0 0;
  padding: 0;
  list-style: none;
}
.social a {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  color: var(--ink-soft);
  border-radius: var(--radius);
}
.social a:hover { color: var(--accent); background: var(--accent-wash); }
.social svg { width: 1.2rem; height: 1.2rem; }

.site-nav {
  order: 3;
  flex-basis: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.25rem;
  padding: 0;
  font-size: var(--step--1);
  font-weight: 500;
}
.site-nav a {
  flex: none;
  padding: 0.7rem 0 0.6rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

@media (min-width: 64rem) {
  .site-header {
    position: sticky;
    top: 0;
    height: 100vh;
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 2rem;
    padding: 4.5rem 2rem 2rem;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    overflow-y: auto;
  }
  .brand { font-size: var(--step-3); line-height: 1.1; letter-spacing: -0.01em; }
  .site-nav {
    order: 0;
    flex-direction: column;
    flex-basis: auto;
    gap: 0;
    width: 100%;
    margin: 0;
    padding: 0;
    flex-wrap: nowrap;
    font-size: 1rem;
  }
  .site-nav a {
    padding: 0.45rem 0 0.45rem 0.9rem;
    border-bottom: 0;
    border-left: 2px solid var(--line);
  }
  .site-nav a:hover { border-left-color: var(--ink-soft); }
  .site-nav a[aria-current="page"] { border-left-color: var(--accent); font-weight: 600; }
  .social { margin: auto 0 0 -0.5rem; }
  .social a { width: 2.5rem; height: 2.5rem; }
}

/* ==========================================================================
   Prose
   ========================================================================== */
h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
h1 { font-size: var(--step-3); margin: 0 0 1.25rem; }
h2 { font-size: var(--step-2); margin: 2.75rem 0 1rem; }
h3 { font-size: var(--step-1); margin: 0 0 0.35rem; }

main p, main ul, main ol { max-width: var(--measure); }
main li { margin: 0.5rem 0; }
main > ul, main > p > strong:first-child { max-width: none; }
blockquote {
  margin: 1.5rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
}

/* ==========================================================================
   Home: intro, news
   ========================================================================== */
.intro {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}
.profile-photo {
  width: 100%;
  max-width: 15rem;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: 8px 8px 0 var(--accent-wash);
}
.intro p { margin: 0 0 1rem; }
.intro > div > p:first-child { font-size: var(--step-1); line-height: 1.5; }
.contact { font-family: var(--sans); font-size: var(--step--1); color: var(--ink-soft); }
.recruiting {
  padding: 0.9rem 1.1rem;
  background: var(--accent-wash);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}
@media (min-width: 40rem) {
  .intro { grid-template-columns: 15rem minmax(0, 1fr); gap: 2.5rem; }
}

.news { list-style: none; margin: 0; padding: 0; max-width: none; }
.news-item {
  display: grid;
  grid-template-columns: 5.25rem minmax(0, 1fr);
  gap: 0 1rem;
  margin: 0;
  padding: 0.8rem 0;
  border-top: 1px solid var(--line);
}
.news-item time {
  font: 500 var(--step--1)/1.9 var(--sans);
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}
.news-title { font-weight: 500; }
.news-text { grid-column: 2; color: var(--ink-soft); font-size: var(--step--1); }
.news-text p { margin: 0.3rem 0 0; }

.news-more { margin-top: 0; }
.news-more > summary,
.pub-bib > summary {
  cursor: pointer;
  font: 500 var(--step--1) var(--sans);
  color: var(--accent);
  padding: 0.6rem 0;
  list-style-position: inside;
}
.news-more[open] > summary { border-top: 1px solid var(--line); }

/* ==========================================================================
   Research highlights
   ========================================================================== */
.highlights { display: grid; gap: 1.5rem; margin-top: 2rem; }
.highlight {
  display: grid;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.highlight-image {
  display: block;
  align-self: center;
  width: calc(100% - 2rem);
  height: auto;
  max-height: 14rem;
  margin: 1rem auto 0;
  padding: 0.5rem;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.highlight-body { padding: 1.1rem 1.25rem 1.25rem; min-width: 0; }
.highlight-body p { margin: 0.5rem 0 0; color: var(--ink-soft); font-size: 1rem; }
.highlight h3 a { color: var(--ink); text-decoration: none; }
.highlight h3 a:hover { color: var(--accent); text-decoration: underline; }
.highlight-kind {
  display: inline-block;
  margin-bottom: 0.55rem;
  padding: 0.05rem 0.6rem;
  font: 500 0.8rem/1.6 var(--sans);
  color: var(--accent);
  background: var(--accent-wash);
  border-radius: 999px;
}
@media (min-width: 48rem) {
  .highlight:has(.highlight-image) { grid-template-columns: 14rem minmax(0, 1fr); }
  .highlight-image { width: calc(100% - 1.5rem); margin: 0 0 0 1rem; max-height: 12rem; }
}

/* ==========================================================================
   Lab members
   ========================================================================== */
.members, .alumni {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr));
  gap: 2rem 1.5rem;
}
.member { min-width: 0; font-family: var(--sans); font-size: 0.95rem; line-height: 1.5; }
.member-photo,
.member-initials {
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 1;
  margin-bottom: 0.8rem;
  border-radius: var(--radius);
  object-fit: cover;
}
.member-initials {
  background: var(--accent-wash);
  color: var(--accent);
  font: 500 3rem/1 var(--serif);
  letter-spacing: 0.04em;
  border: 1px dashed var(--accent);
}
.member h3 { font-size: var(--step-0); margin: 0; }
.member p { margin: 0.2rem 0 0; }
.member-role { color: var(--accent); font-weight: 500; }
.member-topic { color: var(--ink-soft); }
.member-now { font-style: italic; color: var(--ink-soft); }
.member-links { display: flex; flex-wrap: wrap; gap: 0.15rem; margin: 0.4rem 0 0 -0.4rem !important; }
.member-links a {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  color: var(--ink-soft);
  border-radius: var(--radius);
}
.member-links a:hover { color: var(--accent); background: var(--accent-wash); }
.member-links svg { width: 1.1rem; height: 1.1rem; }

/* ==========================================================================
   Publications
   ========================================================================== */
#pub-filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 0.6rem;
  margin: 1.5rem 0 2rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--sans);
}
#pub-search { grid-column: 1 / -1; }
.pub-hint { grid-column: 1 / -1; margin: -0.2rem 0 0.2rem; font-size: 0.8125rem; color: var(--ink-soft); max-width: none; }
#pub-filters input,
#pub-filters select,
#pub-reset {
  min-width: 0;
  width: 100%;
  padding: 0.55rem 0.7rem;
  font: 400 0.9375rem var(--sans);
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
#pub-filters input:focus-visible,
#pub-filters select:focus-visible { outline-offset: 1px; border-color: var(--accent); }
#pub-reset {
  cursor: pointer;
  font-weight: 500;
  color: var(--accent);
  background: transparent;
  border-color: var(--accent);
}
#pub-reset:hover { background: var(--accent-wash); }
#pub-empty { font-family: var(--sans); color: var(--ink-soft); }

.pub-year { margin-top: 2.25rem; }
.pub-year h2 {
  margin: 0 0 0.5rem;
  font: 600 var(--step-2)/1.2 var(--serif);
  font-variant-numeric: lining-nums;
  color: var(--accent);
}
.pub-year ol { list-style: none; margin: 0; padding: 0; max-width: none; }
.pub {
  margin: 0;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
  line-height: 1.5;
}
.pub-title { display: block; font-weight: 650; }
.pub-authors { display: block; margin-top: 0.2rem; color: var(--ink-soft); font-size: 0.95rem; }
.pub-venue { display: block; margin-top: 0.1rem; font-style: italic; font-size: 0.95rem; }
.pub-link { font: 500 var(--step--1) var(--sans); margin-right: 1rem; }
.pub-bib { display: inline-block; max-width: 100%; vertical-align: top; }
.pub-bib > summary { display: inline; padding: 0; }
.pub-bib[open] { display: block; margin-top: 0.4rem; }
.pub-bib pre {
  margin: 0.5rem 0 0;
  padding: 0.8rem 1rem;
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: 0.8125rem/1.5 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  tab-size: 2;
}

@media (min-width: 48rem) {
  .pub-year { display: grid; grid-template-columns: 5.5rem minmax(0, 1fr); gap: 0 1rem; }
  .pub-year h2 { position: sticky; top: 1rem; align-self: start; padding-top: 0.9rem; }
  .pub:first-child { padding-top: 1rem; }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  padding: 1.25rem var(--gutter);
  border-top: 1px solid var(--line);
  font: 0.875rem var(--sans);
  color: var(--ink-soft);
}
.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}
.site-footer p { margin: 0; }
.faculty-logo { display: inline-block; border-radius: var(--radius); line-height: 0; }
.faculty-logo img { width: auto; height: 3rem; max-width: 100%; }
@media (prefers-color-scheme: dark) {
  /* The logo's grey lettering needs a light backdrop on dark pages. */
  .faculty-logo { padding: 0.35rem 0.6rem; background: #fff; }
}
@media (min-width: 64rem) { .site-footer { padding-left: 3rem; padding-right: 3rem; } }

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}