:root {
  --bg: #070b14;
  --card: #121a2b;
  --line: #243049;
  --text: #eef3ff;
  --muted: #9aa8c3;
  --accent: #6ee7b7;
  --accent2: #5b8cff;
  --radius: 18px;
  --max: 860px;
  --max-wide: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(91,140,255,.18), transparent 55%),
              radial-gradient(900px 500px at -10% 20%, rgba(110,231,183,.12), transparent 50%),
              var(--bg);
  color: var(--text);
  line-height: 1.75;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: min(var(--max-wide), calc(100% - 32px)); margin: 0 auto; }
.wrap-narrow { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(7,11,20,.78);
  border-bottom: 1px solid rgba(36,48,73,.8);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; }
.nav-links { display: flex; gap: 14px; align-items: center; color: var(--muted); font-size: .92rem; flex-wrap: wrap; justify-content: flex-end; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px; padding: 9px 14px; font-weight: 700; text-decoration: none !important;
  background: linear-gradient(135deg, var(--accent), #34d399); color: #06281c;
}
.page { padding: 36px 0 56px; }
.page h1 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 8px; }
.meta { color: var(--muted); font-size: .9rem; margin: 0 0 22px; }
.notice {
  background: rgba(251,191,36,.08); border: 1px solid rgba(251,191,36,.35);
  color: #fde68a; border-radius: 14px; padding: 12px 14px; font-size: .9rem; margin-bottom: 22px;
}
.card-doc {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px;
}
.card-doc h2 { font-size: 1.05rem; margin: 28px 0 10px; padding-top: 8px; border-top: 1px solid var(--line); }
.card-doc h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.card-doc p, .card-doc li { color: var(--muted); }
.card-doc ul, .card-doc ol { padding-left: 1.25em; }
.card-doc li { margin: 4px 0; }
.check { list-style: none; padding-left: 0; }
.check li { padding-left: 1.6em; position: relative; margin: 8px 0; }
.check li::before { content: "☐"; position: absolute; left: 0; color: var(--accent); }
footer { padding: 28px 0 48px; color: var(--muted); font-size: .85rem; border-top: 1px solid var(--line); }
.foot-grid { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; }