:root {
  --navy: #0b2540;
  --navy-2: #123256;
  --teal: #189ab4;
  --teal-dark: #127f95;
  --orange: #f0812e;
  --ink: #0b2540;
  --muted: #5c7189;
  --line: #e1e8ef;
  --font-head: 'Poppins', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font-body); color: var(--ink); line-height: 1.7;
  background: radial-gradient(120% 60% at 50% 0%, #17406b 0%, #0b2540 45%, #071a2e 100%) fixed;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal-dark); }

.bar { max-width: 860px; margin: 0 auto; padding: 18px 20px; display: flex; align-items: center; gap: 14px; }
.bar img { height: 30px; }
.bar .sp { flex: 1; }
.bar a { color: #cfe3ef; text-decoration: none; font-size: 14px; font-weight: 600; padding: 8px 14px; border-radius: 999px; border: 1px solid rgba(255,255,255,.2); }
.bar a:hover { background: rgba(255,255,255,.1); color: #fff; }

.sheet { max-width: 860px; margin: 8px auto 60px; padding: 0 20px; }
.paper { background: #fff; border-radius: 20px; padding: 40px 44px 44px; box-shadow: 0 30px 60px -30px rgba(0,0,0,.5); }
h1 { font-family: var(--font-head); font-size: clamp(28px, 4.4vw, 38px); line-height: 1.2; margin: 0 0 6px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 22px; }
.lead { font-size: 17px; color: #25405d; margin: 0 0 24px; }
h2 { font-family: var(--font-head); font-size: 21px; margin: 38px 0 10px; padding-top: 6px; scroll-margin-top: 20px; }
h3 { font-family: var(--font-head); font-size: 16px; margin: 20px 0 6px; }
p, li { overflow-wrap: anywhere; }
p { margin: 0 0 14px; }
ul { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 6px; }

.toc { background: #f3f8fb; border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; margin: 0 0 8px; }
.toc b { display: block; font-family: var(--font-head); margin-bottom: 8px; }
.toc ol { margin: 0; padding-left: 20px; columns: 2; column-gap: 28px; font-size: 14.5px; }
.toc li { margin-bottom: 4px; break-inside: avoid; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }

.tablewrap { overflow-x: auto; margin: 0 0 16px; border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
th { text-align: left; background: #f3f8fb; font-family: var(--font-head); font-size: 13px; padding: 11px 14px; border-bottom: 1px solid var(--line); white-space: nowrap; }
td { padding: 11px 14px; border-bottom: 1px solid #eef2f6; vertical-align: top; }
tr:last-child td { border-bottom: 0; }

.note { background: #fff6ec; border: 1px solid #f3c9a6; border-radius: 12px; padding: 14px 18px; margin: 0 0 16px; font-size: 15px; }
.contact { background: #f3f8fb; border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; }
.contact p { margin: 0 0 6px; }

.foot { max-width: 860px; margin: 0 auto 40px; padding: 0 20px; text-align: center; color: #8fb3c9; font-size: 13px; }
.foot a { color: #cfe3ef; }

@media (max-width: 640px) {
  .paper { padding: 26px 20px 30px; border-radius: 16px; }
  .toc ol { columns: 1; }
}