:root {
  --ink: #1F2328;
  --muted: #59636E;
  --line: #D8DEE4;
  --accent: #1F3A5F;
  --accent-soft: #EEF2F7;
  --bg: #FFFFFF;
  --soft: #F6F8FA;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #E6EDF3;
    --muted: #9198A1;
    --line: #3D444D;
    --accent: #8DB4E2;
    --accent-soft: #1B2636;
    --bg: #0D1117;
    --soft: #151B23;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", -apple-system, "Segoe UI", sans-serif;
  font-size: 16px; line-height: 1.75; color: var(--ink); background: var(--bg);
}
a { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

/* ヘッダー */
header.site { border-bottom: 1px solid var(--line); background: var(--soft); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; }
.brand img { width: 32px; height: 32px; border-radius: 6px; }
nav.site { display: flex; align-items: center; gap: 14px; font-size: 14px; flex-wrap: wrap; }
.lang-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.lang-switch button {
  border: 0; background: transparent; color: var(--muted); padding: 3px 10px; cursor: pointer; font: inherit; font-size: 13px;
}
.lang-switch button[aria-pressed="true"] { background: var(--accent); color: var(--bg); }

main.wrap { padding: 32px 16px 48px; }
h1 { font-size: 30px; line-height: 1.3; margin: 0 0 12px; }
h2 { font-size: 21px; line-height: 1.4; margin: 40px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
h3 { font-size: 17px; margin: 24px 0 8px; }
p, ul, ol { margin: 0 0 14px; }
li { margin-bottom: 4px; }
.lead { font-size: 18px; color: var(--muted); }
.meta { font-size: 14px; color: var(--muted); }
code { font-family: ui-monospace, Consolas, monospace; font-size: .9em; background: var(--soft); padding: 1px 5px; border-radius: 4px; overflow-wrap: anywhere; }

/* ホームのヒーロー */
.hero { display: flex; gap: 20px; align-items: center; margin-bottom: 8px; }
.hero img { width: 96px; height: 96px; flex: none; border-radius: 16px; border: 1px solid var(--line); background: #FFF; }
@media (max-width: 480px) {
  .hero { flex-direction: column; align-items: flex-start; }
  h1 { font-size: 26px; }
}
.cta { display: inline-block; margin-top: 6px; padding: 9px 16px; border-radius: 6px; background: var(--accent-soft); color: var(--ink); font-size: 14px; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; padding: 0; list-style: none; }
.features li { margin: 0; padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--soft); }
.features strong { display: block; margin-bottom: 2px; }

table.scopes { width: 100%; border-collapse: collapse; font-size: 15px; margin-bottom: 14px; }
table.scopes th, table.scopes td { text-align: left; vertical-align: top; padding: 8px 10px; border: 1px solid var(--line); }
table.scopes th { background: var(--soft); }
.table-scroll { overflow-x: auto; }

footer.site { border-top: 1px solid var(--line); padding: 20px 0 32px; font-size: 14px; color: var(--muted); }
footer.site .wrap { display: flex; gap: 16px; flex-wrap: wrap; }

/* 言語の切り替え：JavaScript が動かない環境では両方の言語を表示する */
html.lang-en [lang="ja"]:not(html) { display: none; }
html.lang-ja [lang="en"]:not(html) { display: none; }