*{box-sizing:border-box}
body{margin:0;background:#f3f6f8;color:#102b42;font:17px/1.75 Arial,sans-serif}
main{max-width:1180px;margin:auto;padding:clamp(16px,3vw,32px)}
a{color:#075d66}
a:focus-visible,summary:focus-visible{outline:3px solid #087d73;outline-offset:3px}
.crumbs{font-size:.92rem;color:#40566a;margin:0 0 16px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:32px;align-items:start}
article{background:#fff;border:1px solid #dbe5ec;border-radius:16px;padding:clamp(20px,4vw,48px);min-width:0}
.kicker{margin:0 0 6px;font-size:.88rem;font-weight:700;color:#0b6f63}
h1{font-size:clamp(1.9rem,4.5vw,2.7rem);line-height:1.2;margin:0 0 20px}
h2{margin:40px 0 10px;font-size:1.45rem;scroll-margin-top:84px}
h3{margin:28px 0 8px;font-size:1.15rem;scroll-margin-top:84px}
h4{scroll-margin-top:84px}
.side{position:sticky;top:84px;max-height:calc(100vh - 100px);overflow:auto;font-size:.95rem;line-height:1.5;padding-bottom:16px}
.side h2{margin:0 0 8px;font-size:.85rem;text-transform:none;color:#40566a;letter-spacing:.02em}
.side ol{list-style:none;margin:0 0 24px;padding:0;border-inline-start:2px solid #dbe5ec}
.side li a{display:block;padding:6px 12px;color:#26445f;text-decoration:none;border-inline-start:2px solid transparent;margin-inline-start:-2px}
.side li a:hover{color:#075d66;background:#e9f1f5}
.side li a[aria-current=page],.side li a.active{color:#075d66;font-weight:700;border-inline-start-color:#0b6f63}
.toc-mobile{display:none;margin:0 0 20px;border:1px solid #dbe5ec;border-radius:10px;background:#f7fafb}
.toc-mobile summary{min-height:48px;display:flex;align-items:center;padding:0 14px;font-weight:700;cursor:pointer}
.toc-mobile ol{margin:0;padding:0 14px 12px;list-style:none}
.toc-mobile li{padding:4px 0}
.table{overflow-x:auto;margin:16px 0}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{border-bottom:1px solid #dbe5ec;padding:8px 10px;text-align:right;vertical-align:top}
th{background:#f1f6f8}
td.num,th.num{text-align:left;direction:ltr;white-space:nowrap}
img{max-width:100%;height:auto}
.fig-link{display:block;cursor:zoom-in}
figure.math{margin:18px 0;text-align:center;direction:ltr}
figure.math img{max-height:70px}
pre.math{background:#f1f6f8;padding:12px;border-radius:8px;overflow-x:auto}
code{background:#f1f6f8;padding:1px 5px;border-radius:4px;direction:ltr;unicode-bidi:embed;font-size:.9em}
.pager{display:flex;justify-content:space-between;gap:16px;margin:48px 0 0;padding-top:24px;border-top:1px solid #dbe5ec}
.pager a{display:flex;flex-direction:column;gap:2px;padding:14px 18px;border:1px solid #c9d8e3;border-radius:12px;text-decoration:none;color:#0a2037;font-weight:700;min-width:0;max-width:48%}
.pager a span{font-size:.82rem;font-weight:400;color:#40566a}
.pager a:hover{border-color:#0b6f63;background:#f1f8f7}
.pager .next{margin-inline-start:auto;text-align:left}
.source{font-size:.9rem;color:#40566a;margin-top:24px}
@media (max-width:900px){
 .layout{grid-template-columns:minmax(0,1fr)}
 .side{display:none}
 .toc-mobile{display:block}
 .pager a{max-width:none;flex:1}
}