/* Layout: single reading column (~68ch) under a header whose bottom edge is a
   discrete-event timeline (ticks + one orange event). Wide screens add a narrow
   left rail for section labels set in mono. */
:root {
  --paper: #dcedf9;
  --surface: #ffffff;
  --ink: #151b27;
  --muted: #576074;
  --rule: #c2dbee;
  --accent: #c4561b;      /* Bucknell orange, deepened for text contrast */
  --accent-soft: #fbe9dd;
  --navy: #1f3a68;
  --font-display: "Newsreader", "Iowan Old Style", Georgia, serif;
  --font-body: "Public Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --step--1: 0.84rem;
  --step-0: 1.0625rem;
  --step-1: 1.3rem;
  --step-2: 1.75rem;
  --step-3: clamp(2.2rem, 5vw, 3.4rem);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f141c; --surface: #161d29; --ink: #e6e9ef; --muted: #9aa3b5;
    --rule: #283143; --accent: #f08c4e; --accent-soft: #3a2518; --navy: #a9c0ea;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0f141c; --surface: #161d29; --ink: #e6e9ef; --muted: #9aa3b5;
  --rule: #283143; --accent: #f08c4e; --accent-soft: #3a2518; --navy: #a9c0ea;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 var(--step-0)/1.65 var(--font-body);
}
img { max-width: 100%; display: block; }
a { color: var(--navy); text-decoration-color: color-mix(in srgb, var(--accent) 70%, transparent); text-underline-offset: 3px; text-decoration-thickness: 1.5px; }
a:hover { color: var(--accent); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; line-height: 1.15; text-wrap: balance; margin: 0; }
h2 { font-size: var(--step-2); }
h3 { font-size: var(--step-1); }
p { margin: 0; }
.wrap {
  width: 100%;
  max-width: 64rem;
  margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; background: var(--surface); padding: 8px 12px; z-index: 20; }

/* ---------- header ---------- */
.site-header { background: var(--surface); position: relative; }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 12px 32px; padding-block: 22px 20px; }
.brand { text-decoration: none; color: var(--ink); display: grid; gap: 2px; }
.brand-name { font-family: var(--font-display); font-size: 1.45rem; font-weight: 600; letter-spacing: -0.01em; }
.brand-role { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.nav { display: flex; flex-wrap: wrap; gap: 4px 20px; font-size: 0.95rem; }
.nav a { color: var(--ink); text-decoration: none; padding-block: 4px; border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--accent); }
.nav a[aria-current="page"] { border-bottom-color: var(--accent); font-weight: 600; }
.nav .ext::after { content: " ↗"; color: var(--muted); font-size: 0.85em; }
/* the event trace: evenly spaced ticks with one scheduled event */
.trace { height: 14px; position: relative; background:
  linear-gradient(var(--rule), var(--rule)) 0 100% / 100% 1px no-repeat,
  repeating-linear-gradient(90deg, var(--rule) 0 1px, transparent 1px 28px) 0 100% / 100% 7px no-repeat;
  background-color: var(--surface); }
.trace::after { content: ""; position: absolute; bottom: -4px; left: var(--event, 62%); width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--paper); }

/* ---------- page scaffolding ---------- */
main { padding-block: 48px 72px; }
.page-head { display: grid; gap: 10px; margin-bottom: 40px; max-width: 46rem; }
.page-head h1 { font-size: var(--step-3); letter-spacing: -0.015em; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 42rem; }
.eyebrow { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.section { display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: 8px 40px; padding-block: 36px; border-top: 1px solid var(--rule); }
.section > .label { font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted); padding-top: 6px; }
.section > .body { min-width: 0; display: grid; gap: 18px; max-width: 44rem; }
.prose { display: grid; gap: 1em; }
.prose em { font-style: italic; }
@media (max-width: 760px) {
  .section { grid-template-columns: minmax(0, 1fr); padding-block: 28px; }
  main { padding-block: 32px 56px; }
}
.mono { font-family: var(--font-mono); font-size: 0.82em; }
.muted { color: var(--muted); }

/* ---------- home ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) 13rem; gap: 32px 48px; align-items: end; margin-bottom: 48px; }
.hero h1 { font-size: var(--step-3); letter-spacing: -0.02em; max-width: 18ch; }
.hero h1 em { color: var(--accent); font-style: italic; }
.hero .lede { margin-top: 16px; }
.portrait { position: relative; aspect-ratio: 1 / 1; max-width: 100%; border-radius: 4px; overflow: hidden; background: var(--navy); display: grid; place-items: center; }
.portrait .mono-gram { font-family: var(--font-display); font-size: 3.6rem; color: var(--paper); font-style: italic; }
.portrait img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
@media (max-width: 760px) { .hero { grid-template-columns: minmax(0, 1fr); } .portrait { width: 9rem; order: -1; } }

.contact { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 18px 28px; }
.contact dt { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted); }
.contact dd { margin: 2px 0 0; }

.interests { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: 24px; }
.interests h3 { font-size: 1.15rem; margin-bottom: 6px; }
.interests p { font-size: 0.97rem; color: var(--muted); }

.now { background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 20px 22px; display: grid; gap: 12px; }
.now-head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items: baseline; }
.now-head h3 { font-size: 1.15rem; }

/* ---------- course lists ---------- */
.courses { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.courses li { display: grid; grid-template-columns: 7.5rem minmax(0, 1fr); gap: 12px; align-items: baseline; }
.courses .code { font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
@media (max-width: 420px) { .courses li { grid-template-columns: minmax(0, 1fr); gap: 0; } }

.terms { display: grid; gap: 0; }
.year { display: grid; grid-template-columns: 6rem minmax(0, 1fr) minmax(0, 1fr); gap: 8px 28px; padding-block: 18px; border-top: 1px solid var(--rule); }
.year > .ay { font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); padding-top: 2px; font-variant-numeric: tabular-nums; }
.term h4 { margin: 0 0 6px; font: 600 0.78rem/1.3 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink); }
.term .note { font-weight: 400; color: var(--accent); text-transform: none; letter-spacing: 0; }
.term ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 3px; font-size: 0.95rem; }
.term li .code { font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); margin-right: 6px; }
@media (max-width: 760px) { .year { grid-template-columns: minmax(0, 1fr); } }

.freq { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.freq td { padding: 7px 0; border-bottom: 1px solid var(--rule); vertical-align: baseline; }
.freq td.n { font-family: var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; width: 4rem; color: var(--muted); }
.freq .bar { display: block; height: 4px; margin-top: 6px; background: var(--accent); border-radius: 2px; opacity: 0.8; }

/* ---------- publications ---------- */
.pubs { display: grid; gap: 0; }
.pub-year { display: grid; grid-template-columns: 4.5rem minmax(0, 1fr); gap: 8px 24px; padding-block: 16px; border-top: 1px solid var(--rule); }
.pub-year > .y { font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted); padding-top: 3px; font-variant-numeric: tabular-nums; }
.pub-year > .items { display: grid; gap: 18px; min-width: 0; }
.pub h3 { font-size: 1.12rem; font-weight: 500; }
.pub .authors { font-size: 0.95rem; margin-top: 4px; }
.pub .authors strong { font-weight: 600; }
.pub .venue { font-size: 0.93rem; color: var(--muted); }
.links { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chip { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase; padding: 2px 8px; border: 1px solid var(--rule); border-radius: 3px; text-decoration: none; color: var(--navy); background: var(--surface); }
a.chip:hover { border-color: var(--accent); color: var(--accent); }
.tag { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase; padding: 1px 7px; border-radius: 3px; background: var(--accent-soft); color: var(--accent); white-space: nowrap; }
@media (max-width: 520px) { .pub-year { grid-template-columns: minmax(0, 1fr); } }

details.more { border-top: 1px solid var(--rule); padding-top: 14px; }
details.more summary { cursor: pointer; font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--navy); }
.talks { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 12px; font-size: 0.95rem; }
.talks .when { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); display: block; }

/* ---------- students ---------- */
.people { display: grid; gap: 0; }
.person { padding-block: 20px; border-top: 1px solid var(--rule); display: grid; gap: 8px; }
.person:first-child { border-top: 0; padding-top: 0; }
.person-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; }
.person h3 { font-size: 1.2rem; }
.person .meta { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); }
.person ul { margin: 0; padding-left: 1.1em; display: grid; gap: 4px; font-size: 0.96rem; }
.person ul ul { margin-top: 4px; }
.person .placement { font-size: 0.93rem; }
.person .placement::before { content: "Next: "; font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); }
.callout { background: var(--surface); border: 1px solid var(--rule); border-left: 3px solid var(--accent); padding: 16px 18px; border-radius: 0 6px 6px 0; }

/* ---------- bio path ---------- */
.path { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.path li { display: grid; grid-template-columns: 5.5rem minmax(0, 1fr); gap: 16px; padding: 12px 0; border-top: 1px solid var(--rule); }
.path .when { font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); font-variant-numeric: tabular-nums; padding-top: 2px; }
.path strong { font-weight: 600; }
.path .where { display: block; font-size: 0.93rem; color: var(--muted); }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--rule); background: var(--surface); font-size: 0.9rem; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px 32px; padding-block: 28px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 18px; }
.site-footer a { color: var(--muted); }

@media (prefers-reduced-motion: no-preference) {
  .trace::after { animation: arrive 900ms cubic-bezier(.2,.7,.2,1) both; }
  @keyframes arrive { from { left: 0; } }
}

/* ---------- BibTeX ---------- */
button.chip { font-family: var(--font-mono); cursor: pointer; line-height: inherit; }
.bib-toggle[aria-expanded="true"] { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.bib { margin-top: 10px; position: relative; background: var(--surface); border: 1px solid var(--rule); border-radius: 4px; }
.bib pre { margin: 0; padding: 14px 16px; padding-right: 5.5rem; overflow-x: auto; font: 400 0.8rem/1.55 var(--font-mono); color: var(--ink); }
.bib .copy-bib { position: absolute; top: 8px; right: 8px; }

/* ---------- student co-authors, stats ---------- */
.student { color: var(--accent); font-weight: 600; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: 16px; margin: 0; }
.stats div { background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 14px 16px; }
.stats dt { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.stats dd { margin: 4px 0 0; font-family: var(--font-display); font-size: 2rem; line-height: 1.1; font-variant-numeric: tabular-nums; }
.talks .chip { margin-left: 4px; }

.page-head h1 em { color: var(--accent); font-style: italic; }