:root {
  --ink: #16181d;
  --ink-soft: #5b6070;
  --rule: #e2e4ea;
  --rule-strong: #c8ccd6;
  --bg: #ffffff;
  --accent: #00274c; /* Michigan blue */
  --accent-soft: #f2f5f9;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8eaf0;
    --ink-soft: #9aa1b2;
    --rule: #2a2e38;
    --rule-strong: #3d4251;
    --bg: #14161b;
    --accent: #9fc3ea;
    --accent-soft: #1b1f27;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  font-feature-settings: "kern", "liga";
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 52rem;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 4rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-strong);
}
a:hover { border-bottom-color: var(--accent); }

/* ---- Masthead ---- */

.masthead {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  margin-bottom: 2.75rem;
}

.masthead-text { flex: 1 1 auto; min-width: 0; }

.masthead-logo {
  flex: 0 0 auto;
  width: clamp(10rem, 35%, 18rem);
  height: auto;
  border: 1px solid var(--rule);
  border-radius: 3px;
}

.eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 0.75rem;
}

h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 5vw, 2.85rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 0.6rem;
}

.tagline {
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin: 0;
}

/* ---- Meta grid (time, place, organizers) ---- */

.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 1.25rem 2rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin: 2.25rem 0 2.5rem;
}

.meta dt {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.3rem;
}

.meta dd { margin: 0; }
.meta dd + dd { margin-top: 0.15rem; }

.affil { color: var(--ink-soft); font-size: 0.9em; }

/* ---- Prose ---- */

section + section { margin-top: 3rem; }

h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.9rem;
}

p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

/* ---- Schedule table ---- */

.table-scroll { overflow-x: auto; margin: 0 -1.5rem; padding: 0 1.5rem; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

thead th {
  text-align: left;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0 0.9rem 0.6rem 0;
  border-bottom: 1px solid var(--rule-strong);
  white-space: nowrap;
}

tbody td {
  padding: 0.85rem 0.9rem 0.85rem 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

tbody tr:hover { background: var(--accent-soft); }

td.date { white-space: nowrap; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
td.speaker { font-weight: 500; width: 34%; }
td.speaker .affil { display: block; font-weight: 400; line-height: 1.35; margin-top: 0.15rem; }
td.title { font-family: var(--serif); }
td.title .tbd { color: var(--ink-soft); font-style: italic; }

tr.past td { opacity: 0.6; }

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

footer {
  margin-top: 4rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--ink-soft);
}
footer p { margin: 0; }

/* Stack once the square mark starts squeezing the title. */
@media (max-width: 40rem) {
  .masthead {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }
  .masthead-logo { order: -1; width: 12rem; }
}

@media (max-width: 34rem) {
  .wrap { padding-top: 3rem; }
  table { font-size: 0.9rem; }
  td.speaker { width: auto; }
}