:root {
  --bg: #f7f8fb;
  --paper: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --brand: #4169E1;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); }
.wrap { width: min(780px, calc(100% - 40px)); margin-inline: auto; }

.doc-header {
  background: rgba(255,255,255,.9);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(180%) blur(8px);
}
.doc-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 60px; flex-wrap: wrap;
}
.doc-header .brand {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 700; text-decoration: none; color: var(--ink); font-size: 14px;
}
.doc-header .mark {
  width: 22px; height: 22px; border-radius: 7px;
  background: linear-gradient(135deg, var(--brand), #7c9bff);
}
.doc-header nav { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; }
.doc-header nav a { color: var(--muted); text-decoration: none; }
.doc-header nav a:hover { color: var(--ink); }

.doc { padding: 40px 0 80px; }
.crumb { font-size: 12px; color: var(--muted); margin: 0 0 20px; }
.crumb a { color: var(--muted); }
h1 { font-size: clamp(22px, 3.6vw, 30px); margin: 0 0 8px; line-height: 1.45; }
.lead { font-size: 16px; color: var(--muted); margin: 0 0 18px; }
.meta { color: var(--muted); font-size: 13px; margin: 0 0 36px; }
h2 {
  font-size: 16px; margin: 2.6em 0 .8em;
  padding-top: 1.1em; border-top: 1px solid var(--line);
}
p, li { font-size: 14.5px; }
ul, ol { padding-left: 1.4em; }
li { margin: .3em 0; }

table {
  border-collapse: collapse; width: 100%; margin: 1.2em 0;
  font-size: 13.5px; background: var(--paper);
}
th, td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; overflow-wrap: anywhere; }
thead th { background: #f1f5f9; font-weight: 600; }

.doc-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 56px; color: var(--muted); font-size: 13px;
}
.doc-footer .wrap { display: flex; justify-content: space-between; gap: 12px 24px; flex-wrap: wrap; }
.doc-footer a { color: var(--muted); }