/* Aizome: indigo and vermilion. Light is the daytime palette, dark is indigo cloth. */
:root {
  --bg: #f4f3ef;
  --ink: #1b2640;
  --muted: #5c6780;
  --line: #d5d7de;
  --accent: #c23a25;
  --rule-past: #b9bfcc;
  --mincho: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", Georgia, serif;
  --gothic: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b2640;
    --ink: #eeede6;
    --muted: #9da7bd;
    --line: #2f3c5b;
    --accent: #ec6d55;
    --rule-past: #3f4d6e;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.75 var(--gothic);
}
a { color: inherit; text-decoration-color: var(--accent); text-underline-offset: .2em; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.page { max-width: 820px; margin: 0 auto; padding-inline: clamp(16px, 5vw, 48px); padding-block: 48px 40px; }

/* Masthead */
.mast { display: grid; gap: 6px; padding-bottom: 20px; border-bottom: 1px solid var(--ink); }
.inst { margin: 0; font-size: 11.5px; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); }
.inst a { text-decoration: none; }
.mast h1 { margin: 0; font: 800 clamp(32px, 6.5vw, 50px)/1.08 var(--mincho); letter-spacing: .01em; text-wrap: balance; }
.mast h1 a { text-decoration: none; }
.mast h1 a:hover { color: inherit; }
.orgs { margin: 0; color: var(--muted); font-size: 15.5px; }
.mast nav { display: flex; flex-wrap: wrap; gap: 4px 18px; padding-top: 6px; font-size: 14px; letter-spacing: .04em; }
.mast nav a { text-decoration: none; color: var(--muted); }
.mast nav a:hover { color: var(--accent); }
.mast nav a[aria-current] { color: var(--ink); border-bottom: 2px solid var(--accent); }

/* Sections and talks */
main { display: grid; gap: 8px; padding-top: 12px; }
section h2 { margin: 28px 0 4px; font: 700 22px/1.3 var(--mincho); }
.talk { display: grid; grid-template-columns: 3.2em 1fr; gap: 20px; padding: 20px 0; border-top: 1px solid var(--line); }
.when {
  writing-mode: vertical-rl;
  justify-self: center;
  padding-left: 7px;
  border-left: 1px solid var(--rule-past);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
#upcoming .when { border-left-color: var(--accent); }
.when .hour { display: block; margin-block-start: .2em; color: var(--ink); }
.title { margin: 0; font: 700 20px/1.4 var(--mincho); text-wrap: balance; }
.title.tba { color: var(--muted); font-weight: 500; }
.who, .meta, .links { margin: 4px 0 0; }
.who .aff { color: var(--muted); }
.who .aff::before { content: "· "; }
.meta { font-size: 14px; color: var(--muted); }
.links { display: flex; gap: 14px; font-size: 14px; }
.abstract { margin-top: 10px; max-width: 66ch; }
.abstract p { margin: 0 0 .7em; }
.abstract p:last-child { margin-bottom: 0; }
.abstract ul, .abstract ol { margin: 0 0 .7em; padding-left: 1.3em; }
.katex { font-size: 1.05em; }
.empty { color: var(--muted); }

/* Index of seminars */
.index { list-style: none; margin: 20px 0 0; padding: 0; }
.index li { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 16px 0; border-top: 1px solid var(--line); }
.index a { font: 700 21px/1.4 var(--mincho); text-decoration: none; }
.index span { color: var(--muted); font-size: 14px; letter-spacing: .06em; }

footer { margin-top: 36px; padding-top: 14px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--muted); }
footer p { margin: 0 0 4px; }

@media (max-width: 520px) {
  .talk { grid-template-columns: 2.6em 1fr; gap: 14px; }
}