/* ==========================================================================
   Classic style: serif headings, warm paper background, single column.
   Change these settings to restyle.
   ========================================================================== */
:root {
  --color-bg: #fbfaf7;
  --color-surface: #ffffff;
  --color-text: #1f2328;
  --color-muted: #5a6270;
  --color-border: #e3e0d8;
  --color-primary: #1d4e6e;
  --color-primary-soft: #e6eef3;
  --color-accent: #a8432a;
  --color-banner-bg: #fff4d6;
  --color-banner-text: #5c4300;

  --font-body: "Source Sans 3", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-heading: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --max-width: 54rem;
  --gutter: 1rem;
  --radius: 8px;
  --bg-opacity: .10;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14171b;
    --color-surface: #1c2025;
    --color-text: #e6e6e3;
    --color-muted: #a3a9b3;
    --color-border: #2f353d;
    --color-primary: #8cc0e0;
    --color-primary-soft: #1f2d38;
    --color-accent: #f0a088;
    --color-banner-bg: #3a2f10;
    --color-banner-text: #f5dc9a;
    --bg-opacity: .14;
  }
}

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

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text);
}
h1 { font-size: clamp(1.75rem, 4vw, 2.25rem); margin: 0 0 .5rem; }
h2 { font-size: 1.375rem; margin: 2.25rem 0 .75rem; padding-bottom: .35rem; border-bottom: 1px solid var(--color-border); }
h3 { font-size: 1.125rem; margin: 1.5rem 0 .5rem; }

a { color: var(--color-primary); text-underline-offset: .15em; }
a:hover { color: var(--color-accent); }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; border-radius: 2px; }

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

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--gutter); }
.muted { color: var(--color-muted); }
.small { font-size: .9rem; }
.lead { font-size: 1.125rem; color: var(--color-muted); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link { position: absolute; left: -999px; top: 0; background: var(--color-surface); padding: .5rem 1rem; z-index: 10; }
.skip-link:focus { left: 1rem; }

.preview-banner {
  background: var(--color-banner-bg); color: var(--color-banner-text);
  text-align: center; padding: .4rem var(--gutter); font-weight: 600; font-size: .9rem;
}


/* Animated background (assets/js/background.js).
   color = lines, --bg-accent = highlights, opacity = overall strength. */
.bg-anim {
  position: fixed; inset: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; display: block;
  color: var(--color-primary); --bg-accent: var(--color-accent); opacity: var(--bg-opacity);
}
/* The graph has thinner marks and text, so it needs a little more strength to read. */
.bg-anim[data-scene="edge-ideals"] { opacity: calc(var(--bg-opacity) * 2); }

/* ==========================================================================
   Header and navigation
   ========================================================================== */
.site-header { border-bottom: 1px solid var(--color-border); background: var(--color-surface); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem 1rem; padding-top: .9rem; padding-bottom: .9rem; }
.brand { font-family: var(--font-heading); font-size: 1.2rem; font-weight: 600; color: var(--color-text); text-decoration: none; }
.brand-mark, .header-search { display: none; }

.site-nav { flex-basis: 100%; display: flex; flex-wrap: wrap; gap: .25rem; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem .25rem; }
.site-nav a {
  display: block; padding: .3rem .6rem; border-radius: var(--radius);
  color: var(--color-muted); text-decoration: none; font-size: .95rem;
}
.site-nav a:hover { color: var(--color-text); background: var(--color-primary-soft); }
.site-nav a[aria-current="page"] { color: var(--color-primary); background: var(--color-primary-soft); font-weight: 600; }

.nav-toggle {
  display: none; font: inherit; font-size: .95rem; padding: .35rem .8rem;
  background: none; color: var(--color-text); border: 1px solid var(--color-border); border-radius: var(--radius); cursor: pointer;
}

@media (max-width: 40rem) {
  .js .nav-toggle { display: block; }
  .js .site-nav { display: none; }
  .js .site-nav.open { display: block; }
  .site-nav { flex-direction: column; }
  .site-nav ul { flex-direction: column; }
}

/* ==========================================================================
   Page content
   ========================================================================== */
main.container { padding-top: 2rem; padding-bottom: 3rem; }
.page-header { margin-bottom: 1.5rem; }
.prose > :first-child { margin-top: 0; }

table { width: 100%; border-collapse: collapse; font-size: .975rem; }
th, td { text-align: left; vertical-align: top; padding: .5rem .75rem .5rem 0; border-bottom: 1px solid var(--color-border); }
th { font-weight: 600; color: var(--color-muted); }
td:first-child { white-space: nowrap; color: var(--color-muted); }
@media (max-width: 40rem) {
  table, tbody, tr, td { display: block; }
  thead { display: none; }
  tr { padding: .5rem 0; border-bottom: 1px solid var(--color-border); }
  td { border: 0; padding: 0; }
}

ul.columns { columns: 2 18rem; padding-left: 1.2rem; }

/* Home */
.home-grid { display: grid; grid-template-columns: minmax(0, 1fr) 15rem; gap: 2.5rem; align-items: start; }
@media (max-width: 52rem) { .home-grid { grid-template-columns: 1fr; } }
.hero { margin: 0 0 1.5rem; }
.hero-art { display: none; }
.hero:not(.has-photo) { display: none; }
.hero-photo { width: 168px; height: 168px; border-radius: 50%; object-fit: cover; object-position: center 18%; border: 3px solid var(--color-surface); box-shadow: 0 0 0 1px var(--color-border); }
.home-lead { font-size: 1.15rem; margin: 0 0 .25rem; }
.home-main .prose { margin-top: 1.5rem; }

.home-side { display: flex; flex-direction: column; gap: 1.25rem; font-size: .95rem; }
.card { border-top: 2px solid var(--color-primary); padding-top: .75rem; }
.card h2 { font-size: 1.05rem; margin: 0 0 .5rem; padding: 0; border: 0; }
.card p { margin: 0 0 .75rem; }
.eyebrow { font-family: var(--font-heading); }
.button { display: inline-block; padding: .4rem .9rem; border-radius: var(--radius); background: var(--color-primary); color: var(--color-bg); text-decoration: none; font-weight: 600; }
.button:hover { color: var(--color-bg); opacity: .9; }
.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .35rem; }
.chips a { display: inline-block; padding: .1rem .55rem; border-radius: 999px; background: var(--color-primary-soft); text-decoration: none; font-size: .875rem; }
.mini-pubs { list-style: none; margin: 0 0 .5rem; padding: 0; }
.mini-pubs li { padding: .35rem 0; display: flex; flex-direction: column; line-height: 1.35; }
.more-link { font-size: .9rem; }

/* Profile (older home layout) */
.profile { display: flex; gap: 1.75rem; align-items: center; margin-bottom: 2rem; }
.profile-photo img, .profile-photo .initials {
  width: 160px; height: 160px; border-radius: 50%; object-fit: cover; flex-shrink: 0;
}
.profile-photo .initials {
  display: grid; place-items: center; background: var(--color-primary); color: var(--color-bg);
  font-family: var(--font-heading); font-size: 3rem;
}
.profile .role { margin: 0 0 .25rem; font-size: 1.1rem; }
.profile .contact-line { margin: .75rem 0 .5rem; }
@media (max-width: 40rem) {
  .profile { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .profile-photo img, .profile-photo .initials { width: 112px; height: 112px; font-size: 2.2rem; }
}

.profile-links { list-style: none; margin: .5rem 0; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.profile-links a {
  display: inline-block; padding: .25rem .7rem; border: 1px solid var(--color-border); border-radius: 999px;
  text-decoration: none; font-size: .9rem; background: var(--color-surface);
}
.profile-links a:hover { border-color: var(--color-primary); }

/* Dated entries (grants, talks) */
.entries { list-style: none; padding: 0; margin: 0; }
.entries li { display: grid; grid-template-columns: 9.5rem 1fr; gap: 1rem; padding: .7rem 0; border-bottom: 1px solid var(--color-border); }
.entries p { margin: 0; }
.entry-date { color: var(--color-muted); font-variant-numeric: tabular-nums; }
.entry-title { font-weight: 600; }
@media (max-width: 40rem) {
  .entries li { grid-template-columns: 1fr; gap: .1rem; }
}

/* People */
.people { list-style: none; padding: 0; margin: 0; }
.people li { display: flex; flex-wrap: wrap; align-items: baseline; gap: .25rem .6rem; padding: .45rem 0; border-bottom: 1px solid var(--color-border); }
.person-name { font-weight: 600; }
.badge {
  font-size: .8rem; padding: .05rem .5rem; border-radius: 999px;
  background: var(--color-primary-soft); color: var(--color-primary); font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   Publications
   ========================================================================== */
.pub-controls { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; justify-content: space-between; margin: 1.5rem 0 .5rem; }
.filter { display: inline-flex; border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; }
.filter button {
  font: inherit; font-size: .95rem; padding: .4rem .9rem; border: 0; cursor: pointer;
  background: var(--color-surface); color: var(--color-muted);
}
.filter button + button { border-left: 1px solid var(--color-border); }
.filter button[aria-pressed="true"] { background: var(--color-primary); color: var(--color-bg); }
.search input {
  font: inherit; font-size: .95rem; padding: .4rem .7rem; width: min(22rem, 100%);
  border: 1px solid var(--color-border); border-radius: var(--radius); background: var(--color-surface); color: var(--color-text);
}
.search { flex: 1 1 14rem; display: flex; justify-content: flex-end; }
@media (max-width: 40rem) { .search { justify-content: stretch; } .search input { width: 100%; } }

.pub-list { list-style: none; padding: 0; margin: 0; }
.pub { padding: .85rem 0; border-bottom: 1px solid var(--color-border); }
.pub p { margin: 0; }
.pub-authors { font-size: .95rem; color: var(--color-muted); }
.pub-authors strong { color: var(--color-text); font-weight: 600; }
.pub-title { font-weight: 600; font-size: 1.05rem; margin: .1rem 0 !important; }
.pub-venue { font-size: .95rem; }
.pub-links { display: flex; flex-wrap: wrap; gap: .25rem 1rem; margin-top: .3rem !important; font-size: .9rem; }
.link-button { font: inherit; background: none; border: 0; padding: 0; color: var(--color-primary); text-decoration: underline; text-underline-offset: .15em; cursor: pointer; }
.link-button:hover { color: var(--color-accent); }

.bibtex { position: relative; margin-top: .5rem; }
.bibtex pre {
  margin: 0; padding: .75rem 1rem; overflow-x: auto; font-family: var(--font-mono); font-size: .8rem; line-height: 1.5;
  background: var(--color-primary-soft); border-radius: var(--radius);
}
.copy-button {
  position: absolute; top: .4rem; right: .4rem; font: inherit; font-size: .8rem; padding: .15rem .55rem; cursor: pointer;
  background: var(--color-surface); color: var(--color-text); border: 1px solid var(--color-border); border-radius: 6px;
}
.pub-group[hidden], .pub[hidden] { display: none; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { border-top: 1px solid var(--color-border); background: var(--color-surface); font-size: .95rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem; padding-top: 1.5rem; padding-bottom: 1.5rem; }
.footer-inner p { margin: 0 0 .5rem; }

/* Style switcher (local and preview builds only) */
.style-switcher {
  position: fixed; right: 1rem; bottom: 1rem; z-index: 30; display: flex; align-items: center; gap: .5rem;
  padding: .4rem .7rem; background: var(--color-surface); color: var(--color-text);
  border: 1px solid var(--color-border); border-radius: var(--radius); font-size: .85rem;
}
.style-switcher select { font: inherit; }