:root{--fg:#23262b;--fg2:#5b6068;--bd:#d8dade;--bg:#fff;--accent:#1f4f7a;--soft:#f6f7f8}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);
 font-family:"Hiragino Sans","Noto Sans JP","Yu Gothic",-apple-system,sans-serif;
 font-size:16px;line-height:1.85;font-feature-settings:"palt"}
a{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(31,79,122,.28)}
a:hover{border-bottom-color:var(--accent)}
.wrap{display:grid;grid-template-columns:266px minmax(0,1fr) 232px;gap:34px;
 max-width:1420px;margin:0 auto;padding:0 22px}
nav.toc{position:sticky;top:0;height:100vh;overflow-y:auto;padding:26px 6px 60px;
 border-right:1px solid var(--bd);font-size:13.5px;line-height:1.6}
nav.toc .bt{font-weight:700;font-size:12px;color:var(--fg2);margin:18px 0 6px;letter-spacing:.06em}
nav.toc a{display:block;padding:3px 8px;border:0;border-radius:4px;color:var(--fg)}
nav.toc a:hover{background:var(--soft)}
nav.toc a.cur{background:#e9eff5;color:var(--accent);font-weight:700}
nav.toc .sub{margin-left:10px;font-size:12.5px;color:var(--fg2)}
nav.toc .sub a{color:var(--fg2);padding:2px 8px}
main{padding:34px 0 120px;min-width:0}
aside{position:sticky;top:0;height:100vh;overflow-y:auto;padding:26px 0 60px;
 border-left:1px solid var(--bd);font-size:12.5px;line-height:1.6}
aside h4{margin:0 0 10px;font-size:11.5px;letter-spacing:.06em;color:var(--fg2)}
aside ol{margin:0;padding-left:20px}
aside li{margin-bottom:9px}
aside a{color:var(--fg2);border:0}
aside a:hover{color:var(--accent)}
h1{font-size:27px;line-height:1.45;margin:0 0 6px;letter-spacing:-.01em}
h1 .cn{display:block;font-size:12.5px;color:var(--fg2);letter-spacing:.1em;margin-bottom:8px;font-weight:600}
h2{font-size:20px;margin:46px 0 14px;padding-bottom:7px;border-bottom:1px solid var(--bd);line-height:1.5}
h3{font-size:16.5px;margin:32px 0 10px;line-height:1.55}
h4{font-size:15px;margin:24px 0 8px;line-height:1.55;color:var(--fg2)}
p{margin:0 0 16px}
ul,ol{margin:0 0 16px;padding-left:1.5em}
li{margin-bottom:7px}
.lead{color:var(--fg2);font-size:15px;line-height:1.8;border-left:3px solid var(--bd);
 padding:2px 0 2px 16px;margin:18px 0 34px}
.tw{overflow-x:auto;margin:0 0 20px}
table{border-collapse:collapse;font-size:14px;line-height:1.7;width:100%}
th,td{border:1px solid var(--bd);padding:8px 11px;vertical-align:top;text-align:left}
th{background:var(--soft);font-weight:700;white-space:nowrap}
blockquote{margin:0 0 18px;padding:12px 18px;background:var(--soft);
 border-left:3px solid #b9bec5;color:var(--fg2)}
blockquote p:last-child{margin-bottom:0}
pre.code{background:#f4f5f6;border:1px solid var(--bd);border-radius:5px;padding:14px 16px;
 overflow-x:auto;font-size:12.5px;line-height:1.7;margin:0 0 20px}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;
 background:#f0f1f2;padding:1px 5px;border-radius:3px}
pre.code code{background:0;padding:0}
figure{margin:24px 0 28px;text-align:center}
figure img{max-width:100%;height:auto}
figcaption{font-size:12.5px;color:var(--fg2);margin-top:10px}
.adm{border:1px solid var(--bd);border-radius:5px;padding:16px 18px 4px;margin:0 0 20px;position:relative}
.adm .adm-l{position:absolute;top:-9px;left:14px;background:var(--bg);padding:0 8px;
 font-size:11px;font-weight:700;letter-spacing:.08em;color:var(--fg2)}
.adm p{margin-bottom:12px}
.adm ul,.adm ol{margin-bottom:12px}
.adm-norm{border-color:#9aa6b2;border-left:4px solid #6b7c8d;background:#fbfcfd}
.adm-norm .adm-l{color:#4a5a6b}
.adm-guard{border-color:#c2b393;border-left:4px solid #a08c62;background:#fdfcfa}
.adm-guard .adm-l{color:#7d6a45}
.adm-practice{border-color:#a9bda9;border-left:4px solid #7d9a7d;background:#fbfdfb}
.adm-practice .adm-l{color:#5a755a}
.adm-open{border-color:#c9b0b0;border-left:4px solid #a97e7e;background:#fdfbfb}
.adm-open .adm-l{color:#8a5f5f}
.adm-definition{border-color:#a9b4c9;border-left:4px solid #7d8aa9;background:#fbfbfd}
.adm-definition .adm-l{color:#55607a}
.adm-column{border:1px dashed #b8b8b8;background:#fafafa}
.adm-column .adm-l{color:#777}
.bridge{margin:52px 0 0;padding:18px 20px;background:var(--soft);border-radius:5px;font-size:15px}
.bridge b{display:block;font-size:11.5px;letter-spacing:.08em;color:var(--fg2);margin-bottom:5px}
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:38px;font-size:14px}
.pager a{padding:10px 14px;border:1px solid var(--bd);border-radius:5px;flex:1;border-bottom:1px solid var(--bd)}
.pager a:hover{background:var(--soft)}
.pager .nx{text-align:right}
.pager small{display:block;color:var(--fg2);font-size:11.5px}
.only{margin:14px 0 26px;font-size:13px;color:var(--fg2)}
.only button{font:inherit;font-size:12.5px;padding:5px 12px;border:1px solid var(--bd);
 background:var(--bg);border-radius:20px;cursor:pointer;color:var(--fg2)}
.only button[aria-pressed=true]{background:#e9eff5;border-color:#9fb4c8;color:var(--accent);font-weight:700}
body.normonly main p,body.normonly main blockquote,body.normonly main figure,
body.normonly main .tw,body.normonly main pre.code,body.normonly main ul,body.normonly main ol,
body.normonly main .lead,body.normonly main .bridge{display:none}
body.normonly main .adm p,body.normonly main .adm ul,body.normonly main .adm ol{display:block}
body.normonly main .adm-practice,body.normonly main .adm-definition,body.normonly main .adm-open,body.normonly main .adm-column{display:none}
hr{border:0;border-top:1px solid var(--bd);margin:34px 0}
footer{border-top:1px solid var(--bd);margin-top:70px;padding:18px 0 0;font-size:12px;color:var(--fg2)}
@media(max-width:1180px){.wrap{grid-template-columns:240px minmax(0,1fr)}aside{display:none}}
@media(max-width:860px){.wrap{grid-template-columns:1fr;gap:0}
 nav.toc{position:static;height:auto;border-right:0;border-bottom:1px solid var(--bd);max-height:230px}}
@page{size:A4;margin:18mm 16mm 20mm}
@media print{
 :root{--bg:#fff;--soft:#f6f7f8}
 body{font-size:10.5pt;line-height:1.75;-webkit-print-color-adjust:exact;print-color-adjust:exact}
 nav.toc,aside,.pager,.only,.tools{display:none!important}
 .wrap{display:block;max-width:none;margin:0}
 main{padding:0;max-width:none}
 h1,h2,h3,h4{page-break-after:avoid;break-after:avoid}
 h1{margin-top:0}
 p,li{orphans:3;widows:3}
 .adm,figure,table,pre,blockquote,.lead,.bridge{page-break-inside:avoid;break-inside:avoid}
 table{font-size:9pt}
 pre{white-space:pre-wrap;word-break:break-all;font-size:8.5pt}
 a{color:inherit;border:0;text-decoration:none}
 footer{margin-top:24px}
 .pbook{page-break-before:always;break-before:page}
 .pbook:first-of-type{page-break-before:auto;break-before:auto}
}
.tools{display:flex;gap:8px;justify-content:flex-end;margin:0 0 18px}
.tools a,.tools button{font:inherit;font-size:12.5px;padding:4px 12px;border:1px solid var(--bd);
 background:var(--bg);border-radius:20px;cursor:pointer;color:var(--fg2);text-decoration:none}
.cover{min-height:60vh;display:flex;flex-direction:column;justify-content:center}
.cover h1{font-size:30px}
.ptoc ol{list-style:none;padding:0}.ptoc li{margin:4px 0}.ptoc .bt{margin-top:14px;font-weight:700}