:root {
  --bg: #ffffff;
  --fg: #1a1f24;
  --muted: #5b6670;
  --accent: #0e7490;
  --accent-fg: #ffffff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11161a;
    --fg: #e8edf0;
    --muted: #9aa6ae;
    --accent: #22b8cf;
    --accent-fg: #0b1215;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  line-height: 1.7;
}
main {
  max-width: 640px;
  margin: 0 auto;
  padding: 96px 16px 48px;
  text-align: center;
}
h1 {
  font-size: 2rem;
  margin: 0 0 16px;
}
h2 {
  font-size: 1.2rem;
  margin: 56px 0 8px;
}
.lead {
  font-size: 1.1rem;
}
.en,
.note,
footer {
  color: var(--muted);
}
.note {
  font-size: 0.875rem;
}
.downloads {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 32px;
}
.button {
  display: inline-block;
  margin-top: 24px;
  padding: 14px 28px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: bold;
  text-decoration: none;
}
footer {
  padding: 24px 16px;
  text-align: center;
  font-size: 0.8rem;
}