:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: #202038;
  background: #f7f7fc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(145deg, #f6f4ff, #f8fbff);
}

main {
  width: min(720px, 100%);
  padding: 48px;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 16px 48px rgba(48, 47, 94, .12);
  text-align: center;
}

.logo {
  width: min(210px, 60vw);
  height: auto;
  margin-bottom: 28px;
}

h1 {
  margin: 0 0 24px;
  color: #3f3f8f;
  font-size: clamp(1.7rem, 4vw, 2.3rem);
}

p {
  margin: 0 0 18px;
  line-height: 1.9;
  text-align: left;
}

.notice {
  padding: 20px;
  margin: 28px 0;
  border-radius: 12px;
  background: #f3f2ff;
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 20px;
  margin-top: 32px;
  font-size: .95rem;
}

a { color: #4b4bb6; }

.language { margin-top: 28px; }

footer {
  margin-top: 36px;
  color: #666;
  font-size: .8rem;
}

@media (max-width: 600px) {
  body { padding: 14px; }
  main { padding: 32px 22px; }
}