:root {
  color-scheme: light;
  --ink: #111;
  --muted: #555;
  --line: #ddd;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
a { color: inherit; text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid #111; outline-offset: 5px; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, h3, h4 { line-height: 1.3; }
.container { max-width: 960px; padding: 0 24px; margin: 0 auto; }
.hero {
  padding: 64px 24px 32px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}
h1 { font-size: clamp(28px, 4.5vw, 42px); letter-spacing: -1px; font-weight: 700; }
.date { margin-top: 20px; color: var(--muted); }
.venue { margin-top: 4px; font-size: 14px; color: var(--muted); }
nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 32px; margin-top: 28px; }
nav a { font-size: 14px; text-decoration: none; }
nav a:hover { text-decoration: underline; }
.section { padding: 48px 0; }
.section + .section { border-top: 1px solid var(--line); }
h2 { font-size: 28px; text-align: center; margin-bottom: 30px; }
.group-title { font-size: 16px; text-align: center; font-weight: 400; margin: 30px 0 24px; }
.people-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px 20px; }
.person { text-align: center; min-width: 0; }
.person img {
  width: 140px;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: center 25%;
  display: block;
  margin: 0 auto 16px;
}
.person h4 { font-size: 16px; }
.person h4 a { text-decoration: none; }
.person h4 a:hover { text-decoration: underline; }
.affiliation { font-size: 13px; margin-top: 8px; line-height: 1.5; }
.position { font-size: 12px; color: var(--muted); margin-top: 4px; }
.alaya-organizers { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 446px; margin: 0 auto; }
.note, .section-note { font-size: 13px; color: var(--muted); text-align: center; }
.note { margin: 24px 0 36px; }
.section-note { margin-top: -16px; }
.day-links { display: flex; justify-content: center; gap: 28px; margin-top: 18px; font-size: 14px; }
.day { margin-top: 36px; }
.day > h3 { font-size: 20px; margin-bottom: 18px; }
.day > h3 span { display: block; font-size: 13px; font-weight: 400; color: var(--muted); margin-top: 6px; }
.schedule { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.schedule-row { display: grid; grid-template-columns: 125px minmax(0, 1fr); gap: 24px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.time { font-size: 14px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.schedule-row h4 { font-size: 14px; line-height: 1.6; font-weight: 600; }
.schedule-speaker { display: inline-block; margin-top: 3px; font-size: 13px; text-decoration: none; }
.schedule-speaker:hover { text-decoration: underline; }
.schedule-speaker span { color: var(--muted); }
.organizers-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; text-align: center; margin-top: 40px; padding-top: 30px; border-top: 1px solid var(--line); }
.organizers-grid h3 { font-size: 13px; font-weight: 400; color: var(--muted); margin-bottom: 10px; }
.organizers-grid a { font-size: 16px; font-weight: 600; }
.organizers-grid p { font-size: 13px; margin-top: 6px; color: var(--muted); }
footer { text-align: center; border-top: 1px solid var(--line); padding: 24px; color: var(--muted); font-size: 12px; }
.skip { position: absolute; top: -100px; left: 16px; padding: 10px; background: #fff; z-index: 2; }
.skip:focus { top: 10px; }
@media (max-width: 700px) {
  .hero { padding-top: 44px; }
  .people-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 20px; }
  .section { padding: 36px 0; }
}
@media (max-width: 420px) {
  .container { padding: 0 20px; }
  .date { font-size: 14px; }
  nav { gap: 24px; }
  .schedule-row { grid-template-columns: 90px minmax(0, 1fr); gap: 12px; }
  .time { font-size: 12px; }
  .schedule-speaker span { display: block; }
  .organizers-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
@media print {
  .hero { padding-top: 20px; }
  nav, .day-links, .skip { display: none; }
  .section { padding: 24px 0; }
  .person, .schedule-row { break-inside: avoid; }
  h2, h3 { break-after: avoid; }
}