/* Dark "graph" band for headers and the network, light paper for reading sections. */
:root {
  --ink: #0B1220;
  --ink-2: #0F172A;
  --ink-line: #1E293B;
  --ink-line-2: #334155;
  --on-ink: #F8FAFC;
  --on-ink-2: #CBD5E1;
  --on-ink-3: #94A3B8;
  --paper: #F7F8FA;
  --card: #FFFFFF;
  --line: #E2E8F0;
  --text: #0F172A;
  --text-2: #475569;
  --text-3: #64748B;
  --link: #1D4ED8;
  --link-ink: #93C5FD;
  --sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--text); font-family: var(--sans); font-size: 16px; line-height: 1.55; }
a { color: var(--link); }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--link-ink); outline-offset: 2px; }
.wrap { max-width: 1160px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.band { background: var(--ink); color: var(--on-ink); }
.band a { color: var(--link-ink); }
.nav { border-bottom: 1px solid var(--ink-line); }
.nav .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; justify-content: space-between; padding-block: 16px; }
.nav .brand { font-weight: 700; font-size: 18px; color: var(--on-ink); text-decoration: none; }
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 22px; font-size: 15px; }
.nav ul a { color: var(--on-ink-2); text-decoration: none; display: inline-block; padding-block: 10px; }
.nav ul a:hover, .nav ul a[aria-current="page"] { color: var(--on-ink); }
.nav ul a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--link-ink); }
.eyebrow { margin: 0; font-family: var(--mono); font-size: 13px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--link-ink); }
h1 { margin: 0; font-size: clamp(32px, 5vw, 44px); line-height: 1.12; letter-spacing: -0.02em; text-wrap: balance; }
h2 { margin: 0; font-size: 28px; letter-spacing: -0.01em; text-wrap: balance; }
.btn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.btn.solid { background: var(--on-ink); color: var(--ink) !important; }
.btn.ghost { border: 1px solid var(--ink-line-2); color: var(--on-ink) !important; font-weight: 500; }
.section { padding-block: 56px; }
.section > .wrap { display: flex; flex-direction: column; gap: 20px; }
.lead { margin: 0; color: var(--text-2); max-width: 68ch; }
footer.foot { border-top: 1px solid var(--line); color: var(--text-3); font-size: 14px; }
footer.foot .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; padding-block: 28px; }
.page-head { padding-block: 40px 36px; display: flex; flex-direction: column; gap: 12px; }
.page-head p.sub { margin: 0; color: var(--on-ink-2); max-width: 68ch; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 13px; color: var(--text-2); }
.chart-legend span { display: inline-flex; align-items: center; gap: 8px; }
.chart-legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.courses { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.course { display: grid; grid-template-columns: minmax(0, 1fr) 190px 220px; gap: 6px 24px; align-items: baseline; padding: 14px 0; border-bottom: 1px solid var(--line); }
.course .cm { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.course .cn { font-weight: 600; }
.course .cw, .course .cr { font-size: 14px; color: var(--text-2); }
.course .cy { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; }
.course .yr { font-family: var(--mono); font-size: 12px; border: 1px solid var(--line); border-radius: 4px; padding: 2px 6px; color: var(--text-2); font-variant-numeric: tabular-nums; }
.talks { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.talk { display: grid; grid-template-columns: 52px minmax(0, 1fr); gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.talk .d { font-family: var(--mono); font-size: 14px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.talk .tt { display: flex; flex-direction: column; gap: 2px; line-height: 1.4; }
.talk .w { font-size: 14px; color: var(--text-2); }
@media (max-width: 760px) { .course { grid-template-columns: minmax(0, 1fr); } .course .cy { justify-content: flex-start; } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }