/* ---- tokens ---- */
:root {
  --bg:         #FBFAF7;
  --bg-subtle:  #F1EFEA;
  --text:       #1A1A1A;
  --text-muted: #5F6470;
  --text-faint: #8A8F99;
  --accent:     #2E4E5E;
  --accent-hover: #1E3644;
  --border:     #E5E2DA;

  --serif: "Iowan Old Style", "Charter", "Georgia", "Cambria", "Times New Roman", serif;
  --sans:  ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono:  ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --measure: 42rem;   /* ~672px */
  --gutter: 1.25rem;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:         #14161A;
    --bg-subtle:  #1C1F25;
    --text:       #E8E7E3;
    --text-muted: #A3AAB5;
    --text-faint: #6F7683;
    --accent:     #8CB6C6;
    --accent-hover: #B0D0DC;
    --border:     #2A2E36;
  }
}
:root[data-theme="dark"] {
  --bg:         #14161A;
  --bg-subtle:  #1C1F25;
  --text:       #E8E7E3;
  --text-muted: #A3AAB5;
  --text-faint: #6F7683;
  --accent:     #8CB6C6;
  --accent-hover: #B0D0DC;
  --border:     #2A2E36;
}


/* ---- reset-ish ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  font-feature-settings: "kern", "liga", "calt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}


/* ---- layout ---- */
main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 5rem var(--gutter) 6rem;
}

section {
  margin-top: 4rem;
}

section > h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}

p {
  margin: 0 0 1.1rem;
}


/* ---- links ---- */
a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 120ms ease, border-color 120ms ease;
}
a:hover, a:focus-visible {
  color: var(--accent-hover);
  border-bottom-color: currentColor;
}
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}


/* ---- hero ---- */
.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2.5rem;
  align-items: start;
}

.hero__text h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 0.35rem;
}

.hero__role {
  font-size: 1.05rem;
  color: var(--text);
  margin: 0 0 0.15rem;
}

.hero__affiliation {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0 0 1.4rem;
}

.hero__links {
  font-size: 0.94rem;
  color: var(--text-faint);
  line-height: 2;
}
.hero__links a {
  margin-right: 0.15rem;
}
.hero__links span {
  color: var(--text-faint);
  margin: 0 0.4rem 0 0.25rem;
}

.hero__portrait {
  width: 148px;
  height: auto;
  border-radius: 4px;
  filter: grayscale(15%) contrast(1.02);
  border: 1px solid var(--border);
}

@media (max-width: 34rem) {
  .hero {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .hero__portrait {
    width: 108px;
    order: -1;
  }
}


/* ---- tags (research interests) ---- */
.tags {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.6rem;
}
.tags li {
  font-size: 0.9rem;
  padding: 0.28rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  background: var(--bg-subtle);
}


/* ---- publications ---- */
.section-note {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.75rem;
}
.section-note:last-child {
  margin-top: 1.5rem;
  margin-bottom: 0;
}

.pubs {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: pub;
}

.pubs > li {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--border);
}
.pubs > li:last-child {
  border-bottom: 1px solid var(--border);
}

.pub__meta {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-faint);
  padding-top: 0.15rem;
  letter-spacing: 0.02em;
}

.pub__title {
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 0.2rem;
}
.pub__authors {
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.5;
  margin-bottom: 0.2rem;
}
.pub__venue {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-style: italic;
}
.pub__venue em {
  font-style: normal;
  color: var(--accent);
  font-weight: 500;
}
.pub__links {
  margin-top: 0.4rem;
  font-size: 0.88rem;
}
.pub__links a {
  margin-right: 0.75rem;
}


/* ---- tutorials (richer layout, more prominent than plain entries) ---- */
.tutorials {
  list-style: none;
  padding: 0;
  margin: 0;
}
.tutorials > li {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1rem;
  padding: 1rem 1rem 1rem 0.9rem;
  margin-bottom: 0.6rem;
  background: var(--bg-subtle);
  border-left: 3px solid var(--accent);
  border-radius: 2px;
}
.tutorials__meta {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-faint);
  padding-top: 0.2rem;
  letter-spacing: 0.02em;
}
.tutorials__title {
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 0.15rem;
}
.tutorials__venue {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 0.35rem;
}
.tutorials__links {
  font-size: 0.88rem;
}
.tutorials__links a {
  margin-right: 0.1rem;
}
@media (max-width: 30rem) {
  .tutorials > li { grid-template-columns: 1fr; gap: 0.25rem; }
}


/* ---- talks / teaching / grants (unified) ---- */
.entries {
  list-style: none;
  padding: 0;
  margin: 0;
}
.entries li {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 1rem;
  padding: 0.65rem 0;
  border-top: 1px solid var(--border);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.5;
}
.entries li:last-child {
  border-bottom: 1px solid var(--border);
}
.entries__meta {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-faint);
  padding-top: 0.15rem;
}
.entries__extra {
  color: var(--text-muted);
  font-size: 0.88rem;
}

@media (max-width: 30rem) {
  .pubs > li, .entries li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
  .pub__meta, .entries__meta {
    font-size: 0.78rem;
  }
}


/* ---- footer ---- */
footer {
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 0.85rem;
}
footer a { color: var(--text-muted); }