:root {
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --line: #e5e5ea;
  --accent: #0a66c2;
  --card: #f5f5f7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --fg: #f5f5f7;
    --muted: #98989d;
    --line: #2c2c2e;
    --accent: #4da3ff;
    --card: #1c1c1e;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Segoe UI", sans-serif;
}
a { color: var(--accent); }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 0; padding-bottom: 0; border-bottom: 1px solid var(--line); }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 14px 0; }
header .site { font-weight: 700; color: var(--fg); text-decoration: none; }
header .lang { font-size: 0.85rem; color: var(--fg); text-decoration: none; padding: 3px 12px; border: 1px solid var(--line); border-radius: 999px; }
header .lang:hover { border-color: var(--accent); color: var(--accent); }
.appbar { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 20px; padding-top: 4px; }
.appbar .appname { font-size: 1.05rem; font-weight: 700; }
.appbar nav { display: flex; gap: 4px; flex-wrap: wrap; }
.appbar nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; padding: 8px 10px; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.appbar nav a:hover { color: var(--fg); }
.appbar nav a[aria-current="page"] { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }
main { padding-top: 24px; padding-bottom: 48px; }
h1 { font-size: 1.8rem; line-height: 1.3; margin: 0.6em 0 0.5em; }
h2 { font-size: 1.3rem; margin: 2em 0 0.5em; padding-bottom: 0.2em; border-bottom: 1px solid var(--line); }
h3 { font-size: 1.05rem; margin: 1.6em 0 0.3em; }
ul, ol { padding-left: 1.4em; }
li { margin: 0.25em 0; }
.lead { color: var(--muted); }
.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); margin: 24px 0; }
.card { display: block; padding: 20px; background: var(--card); border-radius: 14px; text-decoration: none; color: var(--fg); }
.card:hover { outline: 2px solid var(--accent); }
.card strong { display: block; font-size: 1.15rem; margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 0.95rem; }
.button { display: inline-block; padding: 10px 18px; border-radius: 999px; background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; }
.note { padding: 14px 16px; background: var(--card); border-radius: 12px; font-size: 0.95rem; }
.hero { width: 100%; height: auto; border-radius: 14px; margin: 16px 0; }
.icon { width: 72px; height: 72px; border-radius: 16px; }
footer { padding-top: 16px; padding-bottom: 40px; color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--line); }
footer a { color: var(--muted); }
.card { display: flex; gap: 16px; align-items: flex-start; }
.card .icon { flex: none; }
.store { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; margin: 16px 0; }
.qr { margin: 0; text-align: center; font-size: 0.85rem; color: var(--muted); }
.qr img { display: block; width: 128px; height: 128px; border-radius: 8px; background: #fff; }
@media (max-width: 600px) { .qr { display: none; } }

body > main:first-child { padding-top: 32px; }