:root {
  --ink: #173550;
  --ink-soft: #284962;
  --coral: #ff6b5c;
  --mint: #62c4b7;
  --cream: #f8f4eb;
  --sky: #e6f0f7;
  --line: #d6dedf;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.75;
  letter-spacing: .025em;
}
a { color: inherit; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
  padding: 10px max(5vw, 24px);
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.brand { color: var(--ink); font-weight: 700; letter-spacing: .07em; text-decoration: none; }
.brand span { color: var(--coral); }
.header-link { color: var(--ink-soft); font-size: 13px; text-decoration: none; }
.header-link:hover { color: var(--coral); }

.hero {
  position: relative;
  min-height: 480px;
  padding: 52px max(7vw, 32px) 106px;
  overflow: hidden;
  color: #fff;
  background: var(--ink);
}
.hero-inner { position: relative; z-index: 2; max-width: 1160px; margin: 0 auto; }
.eyebrow { margin: 0 0 42px; font-size: 16px; }
.hero h1 { margin: 0; font: 300 clamp(42px, 6vw, 78px)/1.02 Arial, sans-serif; letter-spacing: -.035em; }
.hero h1 span, .hero h1 strong { display: block; }
.hero h1 strong { margin-top: .18em; color: var(--coral); font-weight: 400; }
.catch { margin: 34px 0 4px; font-size: clamp(22px, 3vw, 34px); font-weight: 500; }
.subcatch { margin: 0; color: rgba(255,255,255,.72); font-size: clamp(16px, 2vw, 22px); }
.globe { position: absolute; top: 30px; right: 5vw; width: min(27vw, 260px); aspect-ratio: 1; border: 3px solid rgba(255,255,255,.18); border-radius: 50%; }
.globe::before, .globe::after { content: ""; position: absolute; border: 3px solid rgba(255,255,255,.16); border-radius: 50%; }
.globe::before { inset: 0 29%; }
.globe::after { inset: 29% 0; }
.globe span { position: absolute; right: -24px; bottom: -45px; width: 120%; height: 3px; background: rgba(255,255,255,.18); transform: rotate(-46deg); transform-origin: right; }
.globe span::before, .globe span::after { content: ""; position: absolute; border-radius: 50%; }
.globe span::before { left: 30%; top: -22px; width: 44px; height: 44px; background: var(--coral); }
.globe span::after { right: 5%; top: 30px; width: 24px; height: 24px; background: var(--mint); }

.date-panel {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: 1.1fr .8fr 1fr;
  align-items: center;
  width: min(1160px, calc(100% - 48px));
  margin: -58px auto 0;
  padding: 24px 34px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(23,53,80,.08);
}
.date { display: flex; align-items: center; gap: 18px; }
.date small { color: #7a8790; font-size: 14px; }
.date b { font: 400 clamp(32px, 4vw, 48px)/1 Arial, sans-serif; letter-spacing: .08em; }
.date em { padding: 6px 14px; border-radius: 99px; color: #fff; background: var(--coral); font-style: normal; }
.time { padding: 6px 30px; border-inline: 1px solid var(--line); font: 500 clamp(24px, 3vw, 38px)/1 Arial, sans-serif; text-align: center; white-space: nowrap; }
.venue { display: flex; justify-content: center; align-items: baseline; gap: 14px; }
.venue small { font-size: 14px; }
.venue b { font-size: clamp(17px, 2vw, 24px); }

.content-wrap { width: min(1160px, calc(100% - 48px)); margin: 0 auto; padding: 28px 0 54px; }
.intro { padding: 12px 0 30px; text-align: center; }
.intro p { margin: 0 0 4px; font-size: clamp(16px, 2vw, 21px); font-weight: 600; }
.intro small { color: #667783; font-size: 14px; }
.programs { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.program { padding: 28px 32px; border: 1px solid var(--line); border-radius: 28px; background: #fff; box-shadow: 0 8px 20px rgba(23,53,80,.035); }
.program header { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.program header span { padding: 6px 18px; border-radius: 99px; color: #fff; background: var(--coral); font: 700 14px Arial, sans-serif; }
.program-two header span { background: var(--mint); }
.program time { font: 600 17px Arial, sans-serif; }
.level { margin: 24px 0; padding: 7px 16px; border-radius: 99px; color: var(--coral); background: #fee5df; font-size: 13px; text-align: center; }
.program-two .level { color: #3d998d; background: #def2ee; }
.program h2 { margin: 0 0 22px; font-size: clamp(22px, 2.5vw, 31px); font-weight: 500; line-height: 1.55; }
.program ul { margin: 0; padding: 0; list-style: none; color: #5f707c; font-size: 14px; }
.program li { position: relative; padding-left: 23px; }
.program li::before { content: ""; position: absolute; top: .72em; left: 2px; width: 8px; height: 8px; border-radius: 50%; background: var(--coral); }
.program-two li::before { background: var(--mint); }
.audience { margin: 24px 0 30px; padding: 11px 24px; border-radius: 99px; background: var(--sky); font-weight: 600; text-align: center; }
.audience span, .event-footer strong span { display: inline-block; width: 1px; height: 1.1em; margin: 0 24px; background: #8a9ba6; vertical-align: -2px; }

.details { display: grid; grid-template-columns: minmax(0, 2fr) minmax(250px, .9fr); gap: 32px; align-items: stretch; }
.info-card, .apply-card, .teacher { border: 1px solid var(--line); border-radius: 28px; background: #fff; }
.info-card { padding: 30px 34px; }
.section-label { margin: 0 0 20px; color: var(--coral); font: 500 13px Arial, sans-serif; letter-spacing: .04em; }
.info-card dl { margin: 0; }
.info-card dl div { display: grid; grid-template-columns: 130px 1fr auto; gap: 20px; align-items: baseline; padding: 10px 0; }
.info-card dt { position: relative; padding-left: 28px; color: #677782; font-size: 14px; }
.info-card dt::before { content: ""; position: absolute; top: .45em; left: 0; width: 14px; height: 14px; border-radius: 50%; background: var(--coral); }
.info-card dt.mint::before { background: var(--mint); }
.info-card dt.yellow::before { background: #f4be4f; }
.info-card dd { margin: 0; font-size: clamp(16px, 2vw, 21px); font-weight: 600; }
.info-card small { color: #6e7e89; font-size: 12px; }
.apply-card { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 28px; text-align: center; }
.apply-card p { margin: 0; font-size: 21px; font-weight: 600; }
.apply-card small { margin: 4px 0 14px; color: #6e7e89; }
.apply-card a { width: 100%; margin-top: 18px; padding: 11px 20px; border-radius: 99px; color: #fff; background: var(--coral); font-weight: 700; text-decoration: none; transition: transform .2s, background .2s; }
.apply-card a:hover { background: #eb584a; transform: translateY(-2px); }
.teacher { display: grid; grid-template-columns: 110px 1fr; gap: 26px; align-items: center; margin-top: 28px; padding: 26px 32px; }
.teacher-icon { position: relative; width: 88px; height: 88px; border-radius: 50%; background: var(--sky); }
.teacher-icon::before { content: ""; position: absolute; top: 22px; left: 31px; width: 24px; height: 24px; border: 2px solid var(--ink); border-radius: 50%; }
.teacher-icon::after { content: ""; position: absolute; bottom: 17px; left: 21px; width: 44px; height: 22px; border: 2px solid var(--ink); border-bottom: 0; border-radius: 50% 50% 0 0; }
.teacher .section-label { margin-bottom: 5px; color: var(--mint); }
.teacher h2 { margin: 0; font-size: 23px; font-weight: 500; }
.teacher p:not(.section-label) { margin: 5px 0 0; color: #667783; font-size: 13px; }
.teacher-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 12px; color: var(--coral); font-size: 14px; font-weight: 700; text-decoration: none; }
.teacher-link::after { content: "→"; transition: transform .2s; }
.teacher-link:hover::after { transform: translateX(4px); }

.event-footer { display: flex; justify-content: space-between; align-items: end; gap: 32px; padding: 38px max(7vw, 32px); color: #fff; background: var(--ink); }
.event-footer .section-label { margin-bottom: 14px; }
.event-footer strong { display: block; font-size: 15px; }
.event-footer div > small { display: block; margin-top: 12px; color: rgba(255,255,255,.68); }
.event-footer > p { margin: 0; font-size: 18px; text-align: right; white-space: nowrap; }
.event-footer > p small { display: block; color: var(--coral); font-size: 12px; }

@media (max-width: 760px) {
  .site-header { min-height: 54px; padding-inline: 18px; }
  .hero { min-height: 410px; padding: 38px 24px 92px; }
  .eyebrow { margin-bottom: 34px; font-size: 13px; }
  .hero h1 { max-width: 320px; font-size: 42px; line-height: 1.08; }
  .catch { margin-top: 28px; font-size: 20px; }
  .globe { top: 42px; right: -34px; width: 150px; opacity: .72; }
  .date-panel { grid-template-columns: 1fr; gap: 14px; width: calc(100% - 28px); margin-top: -56px; padding: 21px 24px; border-radius: 20px; }
  .date { justify-content: center; gap: 12px; }
  .date b { font-size: 35px; }
  .time { padding: 13px 0; border-inline: 0; border-block: 1px solid var(--line); font-size: 27px; }
  .content-wrap { width: calc(100% - 28px); padding-top: 22px; }
  .intro { padding-bottom: 22px; }
  .programs, .details { grid-template-columns: 1fr; gap: 16px; }
  .program { padding: 24px 20px; border-radius: 22px; }
  .audience { border-radius: 18px; font-size: 13px; }
  .audience span { display: block; width: 40px; height: 1px; margin: 7px auto; }
  .info-card { padding: 24px 20px; }
  .info-card dl div { grid-template-columns: 95px 1fr; gap: 10px; }
  .info-card small { grid-column: 2; }
  .teacher { grid-template-columns: 76px 1fr; gap: 16px; padding: 22px 18px; }
  .teacher-icon { width: 70px; height: 70px; }
  .teacher-icon::before { top: 17px; left: 24px; width: 20px; height: 20px; }
  .teacher-icon::after { bottom: 13px; left: 17px; width: 35px; height: 18px; }
  .teacher h2 { font-size: 18px; }
  .event-footer { align-items: start; flex-direction: column; padding: 32px 24px; }
  .event-footer strong span { display: block; width: 36px; height: 1px; margin: 8px 0; }
  .event-footer > p { text-align: left; }
}