:root {
  --bg: #fbf9f4;
  --surface: #f4f0e6;
  --text: #24221f;
  --muted: #6b655b;
  --rule: #e3ddd1;
  --rule-strong: #cfc7b8;
  --accent: #8a2f3c;
  --accent-soft: rgba(138, 47, 60, 0.07);

  --serif: "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman", serif;
  --sans: "Source Sans 3", "Source Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --measure: 40rem;   /* comfortable reading width */
  --wide: 66rem;      /* page container */
  --list: 50rem;      /* publication, talk, and course lists */
  --gutter: clamp(1rem, 4vw, 2.5rem);

  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #1b1a18;
  --surface: #24221f;
  --text: #ebe6dc;
  --muted: #a69f93;
  --rule: #38342f;
  --rule-strong: #4a453e;
  --accent: #dc9ea7;
  --accent-soft: rgba(220, 158, 167, 0.09);
  color-scheme: dark;
}

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 1.5rem;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.2;
  margin: 0 0 0.5em;
  text-wrap: balance;
}

h1 { font-size: clamp(2.4rem, 5.5vw, 3.4rem); letter-spacing: -0.015em; }
h2 { font-size: clamp(1.55rem, 3vw, 1.9rem); letter-spacing: -0.01em; }
h3 { font-size: 1.2rem; font-weight: 600; }

p { margin: 0 0 1em; }

a {
  color: var(--accent);
  text-decoration-line: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: text-decoration-color 150ms ease;
}
a:hover { text-decoration-color: currentColor; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

/* KaTeX's default 1.21em runs large beside Source Serif and the sans captions. */
.katex { font-size: 1.08em; }

.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 1em; height: 1em; fill: currentColor; flex: none; }

.skip-link {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  padding: 0.5rem 0.9rem;
  background: var(--text); color: var(--bg);
  font-family: var(--sans);
}
.skip-link:focus { top: 1rem; }

/* Small-caps style label above headings */
.kicker {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.6rem;
}

/* Dates, metadata, link rows */
.meta {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--muted);
}

/* ---------- Header ---------- */

.site-header { border-bottom: 1px solid var(--rule); }
.site-header__inner {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 1.1rem var(--gutter);
  display: flex;
  align-items: center;
  gap: 0.75rem 1.5rem;
  flex-wrap: wrap;
}
.site-name {
  margin-right: auto;
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}
.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem 1.4rem;
  font-family: var(--sans);
  font-size: 0.97rem;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.15rem 0;
  border-bottom: 1px solid transparent;
  transition: color 150ms ease, border-color 150ms ease;
}
.site-nav a:hover { color: var(--text); }
.site-nav a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 1.9rem; height: 1.9rem;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  font-size: 0.95rem;
  cursor: pointer;
  transition: color 150ms ease, border-color 150ms ease;
}
.theme-toggle:hover { color: var(--text); border-color: var(--rule-strong); }

/* ---------- Layout ---------- */

/* Footer sits at the bottom of the window even on short pages. */
body { min-height: 100vh; display: flex; flex-direction: column; }
main { display: block; flex: 1 0 auto; }

.section {
  max-width: var(--wide);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4rem) var(--gutter);
  background: linear-gradient(var(--rule), var(--rule)) center top / calc(100% - 2 * var(--gutter)) 1px no-repeat;
}
.section:first-child { background: none; }


/* Interior pages */
.page {
  max-width: var(--wide);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4rem) var(--gutter) clamp(3rem, 7vw, 5rem);
}
.page-header { max-width: var(--measure); margin-bottom: 2.5rem; }
.page-header h1 { margin-bottom: 0.35em; }
.lede { font-size: 1.12rem; color: var(--muted); }
.page--research .lede { color: var(--text); }

.page h2 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 2.75rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
  max-width: var(--list);
}
.page h2:first-of-type { margin-top: 0; }

/* ---------- Hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  padding-top: clamp(3rem, 8vw, 5.5rem);
  padding-bottom: clamp(3rem, 7vw, 4.5rem);
}
.hero__text { max-width: var(--measure); }
.hero h1 { margin-bottom: 0.2em; }
.hero__intro p { font-size: 1.12rem; }

.portrait {
  width: clamp(11rem, 22vw, 15.5rem);
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 3px;
  margin-top: 0.4rem;
  background: var(--surface);
}
.portrait--placeholder {
  display: grid;
  place-items: center;
  border: 1px solid var(--rule);
  font-family: var(--serif);
  font-size: 3rem;
  color: var(--rule-strong);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1.4rem;
  margin-top: 1.75rem;
  font-family: var(--sans);
  font-size: 0.97rem;
}
.link-row a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
}
.link-row a:hover { text-decoration: underline; }
.link-row .button {
  padding: 0.45rem 0.95rem;
  border: 1px solid var(--accent);
  border-radius: 2px;
  transition: background-color 150ms ease;
}
.link-row .button:hover { background: var(--accent-soft); text-decoration: none; }

/* ---------- Tags ---------- */

.tag {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.02rem 0.45rem;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  border-radius: 2px;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  font-style: normal;
  text-transform: uppercase;
  color: var(--accent);
  vertical-align: 0.12em;
}

/* ---------- Projects ---------- */

.projects { display: grid; gap: 0; }

.project {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem 3rem;
  padding: 2.25rem 0;
  border-top: 1px solid var(--rule);
}
.project:first-child { border-top: 0; padding-top: 0; }
.project__text { max-width: var(--measure); }
.project h3 { font-size: 1.35rem; font-weight: 500; margin-bottom: 0.6rem; }
.page .project__title {
  max-width: none;
  margin: 0 0 0.6rem;
  padding: 0;
  border: 0;
  font-size: 1.35rem;
  font-weight: 500;
}
.project__links {
  display: flex; flex-wrap: wrap; gap: 0.3rem 1.2rem;
  font-family: var(--sans); font-size: 0.95rem;
  margin: 0 0 0.5rem;
}
.project__with { margin: 0; }

/* Related work: compact text entries */
.related {
  margin-top: 1rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--rule);
}
.related__item {
  display: grid;
  grid-template-columns: minmax(0, var(--measure));
  gap: 1rem 2.5rem;
  padding: 1.25rem 0;
}
.related__item + .related__item { border-top: 1px solid var(--rule); }
.page h2.kicker {
  max-width: none;
  margin: 0 0 0.6rem;
  padding: 0;
  border: 0;
  font-size: 0.78rem;
  font-weight: 600;
}
.related h3 { font-size: 1.12rem; font-weight: 600; margin-bottom: 0.1rem; }
.related__meta { margin-bottom: 0.5rem; }
.related__text > p:not(.meta):not(.project__links) { font-size: 1rem; margin-bottom: 0.6rem; }
.related .project__links { margin-bottom: 0.25rem; }
.related__text p:last-child { margin-bottom: 0; }

/* Figure viewer */
.viewer { margin: 0; max-width: var(--list); }
/* Fixed frame so the caption doesn't jump between figures */
.viewer__frame {
  position: relative;
  aspect-ratio: 11 / 5;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 3px;
}
:root[data-theme="dark"] .viewer__frame { border-color: var(--rule-strong); }
.viewer__frame a { display: contents; }
.viewer__frame img {
  position: absolute;
  inset: 0.9rem;
  width: calc(100% - 1.8rem);
  height: calc(100% - 1.8rem);
  object-fit: contain;
  cursor: zoom-in;
}
.viewer__slide { margin: 0; }
.viewer__slide[hidden] { display: none; }
.viewer figcaption {
  margin-top: 0.75rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--muted);
}
.viewer__controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.6rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.viewer__controls button {
  display: inline-grid;
  place-items: center;
  width: 2rem; height: 2rem;
  padding: 0 0 0.12em;
  border: 1px solid var(--rule-strong);
  border-radius: 50%;
  background: transparent;
  color: var(--text);
  font-family: var(--sans);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 150ms ease, background-color 150ms ease;
}
.viewer__controls button:hover { border-color: var(--accent); background: var(--accent-soft); }
/* No JS: list all figures, hide the controls */
.viewer:not(.is-ready) .viewer__controls { display: none; }

/* ---------- Education and CV ---------- */

.entries { list-style: none; margin: 0; padding: 0; max-width: var(--list); }
.page .link-row:first-child { margin: 0 0 2.75rem; }
.entries li { padding: 0.8rem 0; border-top: 1px solid var(--rule); }
.entries li:first-child { border-top: 0; padding-top: 0; }
.entries__head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
}
.entries strong { font-weight: 600; }
.entries__head .meta { white-space: nowrap; }
.entries p { margin: 0.1rem 0 0; }
.education h2 { margin-bottom: 1.25rem; }
.education .entries { max-width: var(--measure); }
.page--cv {
  max-width: 96rem;
  padding-top: 2rem;
}
.page--cv .page-header { margin-bottom: 1rem; }
.page--cv .page-header,
.cv-page > .link-row {
  max-width: calc(var(--wide) - 2 * var(--gutter));
  margin-inline: auto;
}
.cv-page .link-row:first-child { margin-bottom: 1rem; }
.cv-viewer {
  display: block;
  width: 100%;
  height: 90vh;
  min-height: 48rem;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  background: #fff;
}

/* ---------- Publications ---------- */

.pubs { list-style: none; margin: 0; padding: 0; }
.pub { padding: 1.4rem 0; border-top: 1px solid var(--rule); max-width: var(--list); }
.pub:first-child { border-top: 0; padding-top: 0.25rem; }
.pub__title { text-wrap: pretty; font-size: 1.15rem; font-weight: 600; line-height: 1.35; margin: 0 0 0.35rem; }
.pub__title a { color: var(--text); text-decoration: none; }
.pub__title a:hover { color: var(--accent); }
.pub__authors { font-family: var(--sans); font-size: 0.97rem; margin: 0 0 0.2rem; }
.pub__authors .me { font-weight: 600; }
.pub__venue { margin: 0 0 0.55rem; color: var(--muted); }
.pub__venue cite { font-style: italic; }
.pub__links {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.3rem 1.1rem;
  font-family: var(--sans); font-size: 0.92rem;
}
.pub__toggle {
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}
.pub__toggle::after { content: " +"; color: var(--muted); }
.pub__toggle[aria-expanded="true"]::after { content: " −"; }
.pub__toggle:hover { text-decoration: underline; text-underline-offset: 0.2em; }
.pub__panel {
  margin-top: 0.75rem;
  padding: 1rem 1.15rem;
  background: var(--surface);
  border-left: 2px solid var(--rule-strong);
  font-family: var(--serif);
  font-size: 0.98rem;
  color: var(--text);
}
.pub__panel p:last-child { margin-bottom: 0; }
.pub__panel pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.55;
}
.copy-button {
  margin-top: 0.75rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  background: transparent;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.82rem;
  cursor: pointer;
}
.copy-button:hover { color: var(--text); border-color: var(--accent); }

/* ---------- Talks ---------- */

.talks { list-style: none; margin: 0; padding: 0; max-width: var(--list); }
.talks li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 7.5rem;
  gap: 0.25rem 2rem;
  padding: 0.95rem 0;
  border-top: 1px solid var(--rule);
}
.talks li:first-child { border-top: 0; padding-top: 0.25rem; }
.talks__title { font-style: italic; margin: 0 0 0.15rem; }
.talks__event { margin: 0; }
.talks time { text-align: right; padding-top: 0.15rem; font-variant-numeric: tabular-nums; }

/* ---------- Teaching ---------- */

.courses { list-style: none; margin: 0; padding: 0; max-width: var(--list); }
.course {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem 2rem;
  align-items: baseline;
  padding: 1.25rem 0;
  border-top: 1px solid var(--rule);
}
.course:first-child { border-top: 0; padding-top: 0.25rem; }
.course .kicker { margin-bottom: 0.25rem; }
.page .course__title {
  max-width: none;
  margin: 0 0 0.2rem;
  padding: 0;
  border: 0;
  font-size: 1.2rem;
  font-weight: 500;
}
.course p { margin: 0; }
.course__links { font-family: var(--sans); font-size: 0.95rem; white-space: nowrap; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--rule);
  background: var(--surface);
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--muted);
}
.site-footer__inner {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 2.5rem var(--gutter) 1.25rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem 3rem;
}
.site-footer p { margin: 0 0 0.4rem; }
.site-footer__name { font-family: var(--serif); font-size: 1.1rem; color: var(--text); }
.site-footer__links { display: flex; flex-direction: column; gap: 0.4rem; }
.site-footer__links a { display: inline-flex; align-items: center; gap: 0.45rem; text-decoration: none; }
.site-footer__links a:hover { text-decoration: underline; }
.site-footer .site-footer__meta {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 var(--gutter) 2rem;
  font-size: 0.82rem;
}

/* ---------- Small screens ---------- */

@media (max-width: 760px) {
  .hero { grid-template-columns: minmax(0, 1fr); }
  .portrait { order: -1; width: 9.5rem; }
  .viewer__frame { aspect-ratio: 16 / 9; }
  .viewer__frame img { inset: 0.5rem; width: calc(100% - 1rem); height: calc(100% - 1rem); }
  .talks li { grid-template-columns: minmax(0, 1fr); gap: 0.1rem; }
  .talks time { text-align: left; grid-row: 1; }
  .course { grid-template-columns: minmax(0, 1fr); }
  .entries__head { flex-direction: column; gap: 0; }
  .cv-viewer { display: none; }
}

@media print {
  .site-header, .site-footer, .theme-toggle, .viewer__controls { display: none; }
  body { background: #fff; color: #000; }
}

@media (max-width: 760px) {
  .site-nav { order: 3; width: 100%; }
}