/* 下層ページ（プライバシーポリシー・404）共通スタイル。配色・書体はトップページ（index.html）に合わせる */
:root {
  --bg: #F3F6FA;
  --surface: #FFFFFF;
  --ink: #0B1B3A;
  --muted: #56627A;
  --line: #D8DFEA;
  --brand: #1462D6;
  --accent: #1A7FF0;
  --hero-ink: #F3F6FA;
  --hero-bg: #0B1B3A;
  --font-jp: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
  --gutter: clamp(16px, 4vw, 48px);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #07101F; --surface: #0E1A2F; --ink: #E6ECF5; --muted: #95A2BA;
    --line: #1D2B45; --brand: #5AA8FF; --accent: #2E8EFF; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font-family: var(--font-jp); font-size: 16px; line-height: 1.9; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; }
a { color: var(--brand); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.wrap { max-width: 860px; margin-inline: auto; padding-inline: var(--gutter); }

header.site { background: var(--hero-bg); color: var(--hero-ink); }
header.site .wrap { max-width: 1160px; display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 64px; }
.logo { display: block; line-height: 0; }
.logo img { height: 38px; width: auto; }
.back { color: var(--hero-ink); font-size: 14px; text-decoration: none; opacity: .85; }
.back:hover { opacity: 1; }

.eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--brand); }
h1 { font-weight: 900; font-size: clamp(28px, 4vw, 40px); line-height: 1.35; margin: 12px 0 0; text-wrap: balance; }
h2 { font-size: 19px; font-weight: 700; margin: 0 0 8px; text-wrap: balance; }
main { padding-block: clamp(48px, 7vw, 88px); }
.lead { margin-top: 20px; color: var(--muted); }
.doc { margin-top: 48px; display: grid; gap: 36px; }
.doc section { border-top: 1px solid var(--line); padding-top: 28px; }
.doc p, .doc li { font-size: 15px; }
.doc p + p, .doc p + ul, .doc ul + p { margin-top: 10px; }
.doc p { margin: 0; }
.doc ul { margin: 0; padding-left: 1.3em; display: grid; gap: 4px; }
.doc dl { margin: 0; display: grid; grid-template-columns: 8em minmax(0,1fr); gap: 6px 16px; font-size: 15px; }
.doc dt { color: var(--muted); }
.doc dd { margin: 0; }
.meta { margin-top: 48px; font-size: 13px; color: var(--muted); text-align: right; }

.btn { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; background: var(--accent); color: #FFFFFF; border-radius: 999px; padding: 12px 22px; font-size: 15px; }
.code404 { font-family: var(--font-mono); font-size: clamp(64px, 14vw, 140px); line-height: 1; font-weight: 600; color: var(--brand); letter-spacing: -.04em; }

footer.site { background: var(--hero-bg); color: color-mix(in srgb, var(--hero-ink) 55%, transparent); font-size: 12px; font-family: var(--font-mono); }
footer.site .wrap { max-width: 1160px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-block: 28px; }
footer.site a { color: inherit; }
@media (max-width: 480px) { .doc dl { grid-template-columns: minmax(0,1fr); gap: 0 0; } .doc dd { margin-bottom: 8px; } }