:root {
  --ink: #1a1a1a;
  --muted: #5e584f;
  --paper: #f4f1eb;
  --red: #d0121a;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(ellipse at top, rgba(255, 255, 255, 0.7), transparent 55%),
    var(--paper);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Hiragino Mincho Pro", "Noto Serif JP", serif;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

main {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 24px;
}

.notice {
  width: min(42rem, 100%);
  text-align: center;
}

.logo {
  display: block;
  width: 52px;
  height: auto;
  margin: 0 auto 40px;
}

h1 {
  margin: 0 0 32px;
  font-size: clamp(1.35rem, 3.4vw, 1.75rem);
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.7;
}

h1::after {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  margin: 22px auto 0;
  background: var(--red);
}

p {
  margin: 0 auto;
  font-size: 0.98rem;
  letter-spacing: 0.06em;
}

.en {
  white-space: nowrap;
}

.link {
  display: inline-block;
  margin-top: 36px;
  padding: 14px 22px 13px;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  line-height: 1.4;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.link:hover,
.link:focus-visible {
  background: var(--ink);
  color: #fff;
  outline: none;
}

.link:focus-visible {
  box-shadow: 0 0 0 3px rgba(208, 18, 26, 0.35);
}

@media (max-width: 520px) {
  main {
    padding: 40px 20px;
  }

  .logo {
    width: 44px;
    margin-bottom: 32px;
  }

  h1 {
    font-size: 1.2rem;
    letter-spacing: 0.04em;
  }

  p {
    font-size: 0.92rem;
    letter-spacing: 0.03em;
  }
}