:root {
  color-scheme: light dark;
  --text: #1c1c1e;
  --sub: #6e6e73;
  --bg: #f2f2f7;
  --card: #ffffff;
  --accent: #d9483b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f2f2f7;
    --sub: #a1a1a6;
    --bg: #000000;
    --card: #1c1c1e;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

h1 {
  font-size: 1.8rem;
  margin: 0 0 8px;
}

h2 {
  font-size: 1.2rem;
  margin: 32px 0 8px;
}

p,
li {
  color: var(--text);
}

.lead {
  color: var(--sub);
  margin-top: 0;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 16px 20px;
  margin: 16px 0;
}

a {
  color: var(--accent);
}

nav {
  margin-bottom: 24px;
  font-size: 0.9rem;
}

footer {
  margin-top: 48px;
  font-size: 0.85rem;
  color: var(--sub);
}

.lang {
  float: right;
}

/* App Store へのリンクのボタン */
.store-button {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 12px;
  background: #000;
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
@media (prefers-color-scheme: dark) {
  .store-button {
    background: #fff;
    color: #000;
  }
}