:root {
  --ink: #222;
  --muted: #626262;
  --line: #ddd;
  --blue: #3857c5;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 24px; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-size: 15px;
  line-height: 1.85;
}
a { color: var(--blue); text-underline-offset: 4px; }
a:hover { text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
.wrap { width: min(960px, calc(100% - 64px)); margin-inline: auto; }
.header { background: #ededed; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding-block: 23px; }
.brand { display: flex; align-items: center; gap: 18px; color: var(--ink); text-decoration: none; line-height: 1.5; }
.brand-logo { display: block; width: 130px; height: auto; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; }
.brand-name { font-size: 24px; font-weight: 700; }
.brand-sub { font-size: 11px; color: var(--muted); }
nav { display: flex; flex-wrap: wrap; gap: 24px; font-size: 13px; }
nav a { color: var(--ink); text-decoration: none; }
nav a:hover { text-decoration: underline; }
.hero { padding-block: 50px 32px; }
.eyebrow { color: var(--muted); font-size: 13px; margin: 0 0 8px; }
h1 { font-size: clamp(26px, 3.5vw, 36px); line-height: 1.5; margin: 0 0 20px; }
.intro { margin: 0 0 22px; }
.hero-details { margin-bottom: 24px; }
.hero-details p { margin: 0; }
.hero-date { font-size: 20px; font-weight: 700; }
.hero-date span { display: inline-block; font-size: 16px; margin-left: 16px; }
.button { display: inline-block; background: var(--blue); color: #fff; padding: 9px 22px; border-radius: 3px; text-decoration: none; font-size: 14px; }
.button span { margin-left: 18px; }
.button:hover { background: #2e46a1; }
.notice { display: flex; align-items: flex-start; gap: 16px; padding: 16px 20px; background: #f5f5f5; font-size: 13px; }
.notice p { margin: 0; }
.status { white-space: nowrap; font-weight: 700; }
.section { padding-block: 38px; border-bottom: 1px solid var(--line); }
.section-title { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; margin-bottom: 20px; }
h2 { font-size: 23px; line-height: 1.5; margin: 0; }
h3 { font-size: 16px; margin: 0 0 6px; }
.section-body > p { margin: 0 0 18px; }
.facts { margin: 0; }
.facts > div { display: grid; grid-template-columns: 135px 1fr; gap: 24px; padding-block: 12px; border-top: 1px solid #eee; }
.facts > div:first-child { border-top: 0; padding-top: 0; }
dt { font-weight: 700; }
dd { margin: 0; }
.detail-note { font-size: 13px; color: var(--muted); }
.schedule-badge { color: var(--muted); font-size: 12px; border: 1px solid var(--line); padding: 1px 9px; border-radius: 3px; }
.program-note { font-size: 13px; color: var(--muted); }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline > li { display: grid; grid-template-columns: 150px 1fr; gap: 24px; padding-block: 18px; border-top: 1px solid var(--line); }
.timeline-time { margin: 0; font-weight: 700; font-size: 15px; }
.timeline-time span { margin-left: 5px; font-weight: 400; white-space: nowrap; }
.timeline > li > div > p { margin: 0; font-size: 14px; color: var(--muted); }
.session-details { margin: 8px 0 0; padding-left: 1.4em; font-size: 14px; color: var(--muted); }
.session-details li { padding-block: 3px; overflow-wrap: anywhere; }
.access-map { margin-top: 22px; border: 1px solid var(--line); }
.access-map iframe { display: block; width: 100%; height: 400px; border: 0; }
.registration { margin-top: 0; }
.registration-inner { padding-block: 38px; border-bottom: 1px solid var(--line); }
.registration h2 { margin-bottom: 16px; }
.registration p { margin: 0 0 20px; }
.registration-button { display: inline-flex; align-items: center; flex-wrap: wrap; gap: 20px; max-width: 100%; padding: 12px 22px; border: 1px solid #ccc; border-radius: 3px; background: #eee; color: #555; font: inherit; text-decoration: none; }
.registration-button:disabled { opacity: 1; cursor: not-allowed; }
.registration-button[href] { background: var(--blue); border-color: var(--blue); color: #fff; }
.button-status { font-size: 12px; }
.registration-action #registration-note { font-size: 12px; color: var(--muted); margin: 12px 0 0; }
.footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; padding-block: 28px; font-size: 12px; }
.footer p { margin: 0; color: var(--muted); }
.footer strong { font-size: 14px; }
.skip { position: absolute; left: 16px; top: -100px; background: #fff; padding: 10px; z-index: 10; }
.skip:focus { top: 16px; }

@media (max-width: 700px) {
  .wrap { width: calc(100% - 40px); }
  .brand { gap: 12px; }
  .brand-logo { width: 106px; }
  .brand-name { font-size: 21px; }
  .brand-sub { font-size: 10px; }
  .header-inner { flex-direction: column; align-items: flex-start; gap: 18px; padding-block: 18px; }
  nav { width: 100%; justify-content: space-between; gap: 8px; font-size: 12px; }
  .hero { padding-block: 34px 26px; }
  .hero-date { font-size: 18px; }
  .hero-date span { display: block; margin-left: 0; font-size: 14px; }
  .notice { padding: 14px; gap: 12px; font-size: 12px; }
  .section, .registration-inner { padding-block: 30px; }
  .facts > div { grid-template-columns: 85px 1fr; gap: 16px; font-size: 14px; }
  .timeline > li { grid-template-columns: 98px 1fr; gap: 16px; }
  .timeline-time span { display: block; margin-left: 0; font-size: 13px; }
  .access-map iframe { height: 300px; }
  .footer { align-items: flex-start; }
}