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:root{--bg:#14171c;--card:#1c2128;--fg:#e6e8eb;--mut:#8e9094;--line:#36383d;--acc:#4fc3f7;--soft:#232a33;--on-acc:#111111;--r:4px;--sh:0 2px 14px rgba(0,0,0,.35);--bd:0;--fh:"PT Serif",Georgia,"Times New Roman",serif;--fb:"PT Sans",system-ui,"Segoe UI",Roboto,Arial,sans-serif;--w:1240px}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.65 var(--fb);overflow-wrap:break-word}
svg{max-width:100%}
a{color:var(--acc);text-underline-offset:2px}
a:hover{text-decoration-thickness:2px}
h1,h2,h3{font-family:var(--fh);line-height:1.25;color:var(--fg)}
h1{font-size:clamp(1.65rem,4vw,2.4rem);margin:.3em 0 .5em}
h2{font-size:clamp(1.3rem,3vw,1.55rem);margin:1.8em 0 .6em}
h3{font-size:1.15rem;margin:1.3em 0 .4em}
ul,ol{padding-left:1.3em}
li{margin:.25em 0}
table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:1.2em 0;font-size:.95em}
th,td{border:1px solid var(--line);padding:.5em .7em;text-align:left;vertical-align:top}
th{background:var(--soft)}
.s-container{max-width:var(--w);margin:0 auto;padding:0 16px}
.s-top{border-bottom:1px solid var(--line)}
.s-top > .s-container{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;padding-top:14px;padding-bottom:14px}
.s-home-link{display:inline-flex;align-items:center;gap:10px;font:700 1.25rem/1.2 var(--fh);color:var(--fg);text-decoration:none}
.s-slogan{margin:.2em 0 0;color:var(--mut);font-size:.95rem}
.s-links{display:flex;flex-wrap:wrap;gap:6px 18px}
.s-links a{color:var(--fg);text-decoration:none;font-size:.97rem;padding:4px 0;border-bottom:2px solid transparent}
.s-links a:hover,.s-links a.s-is-on{border-bottom-color:var(--acc)}
.s-ribbon{background:var(--soft)}
.s-ribbon > .s-container{padding-top:10px;padding-bottom:10px}
.s-top-block{padding-top:22px;padding-bottom:16px}
main{padding:20px 0 40px;min-width:0}
.s-breadcrumbs{font-size:.9rem;color:var(--mut);margin-top:6px}
.s-breadcrumbs a{color:var(--mut)}
.s-meta{color:var(--mut);font-size:.92rem;margin:-.2em 0 1.2em}
.s-prose > p:first-child{font-size:1.06em}
.s-tip{display:block;margin:1.4em 0;padding:14px 18px;background:var(--soft);border-left:4px solid var(--acc);border-radius:var(--r)}
.s-tip strong:first-child{display:block;margin-bottom:.2em;font-family:var(--fh)}
.s-tip p{margin:.3em 0}
.s-toc{margin:1em 0 1.6em;padding:14px 18px;background:var(--card);border:var(--bd);border-radius:var(--r);box-shadow:var(--sh)}
.s-toc > p,.s-toc summary{margin:0 0 .3em;font-weight:700;font-family:var(--fh);cursor:pointer}
.s-toc ol{margin:.3em 0 0}
.s-answers details{border-bottom:1px solid var(--line);padding:10px 0}
.s-answers summary{cursor:pointer;font-weight:700}
.s-see-also{margin-top:28px;padding-top:8px;border-top:1px solid var(--line)}
.s-see-also ul{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.s-see-also .s-thumb{display:block;width:100%;height:110px;border-radius:var(--r);margin-bottom:6px}
.s-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px;margin:1em 0 2em}
.s-card{background:var(--card);border:var(--bd);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden;padding:0 0 14px}
.s-card h3{font-size:1.08rem;margin:12px 16px 6px}
.s-card h3 a{color:var(--fg);text-decoration:none}
.s-card .s-lead-in{margin:0 16px;color:var(--mut);font-size:.93rem}
.s-thumb{display:block;width:100%;height:150px}
.s-list{padding-left:1.2em}
ul.s-list{list-style:none;padding:0}
.s-list li{margin:0 0 18px}
.s-list li > a{font:700 1.1rem/1.3 var(--fh)}
.s-list .s-lead-in{margin:.3em 0 0;color:var(--mut)}
.s-sym{vertical-align:-3px;margin-right:8px}
.s-side-col{font-size:.95rem;min-width:0}
.s-side-col ul{list-style:none;padding:0}
.s-panel{background:var(--card);border:var(--bd);border-radius:var(--r);box-shadow:var(--sh);padding:14px 18px;margin:20px 0}
.s-site-foot{border-top:1px solid var(--line);background:var(--soft);color:var(--fg);padding:22px 0;font-size:.93rem}
.s-site-foot a{color:var(--fg)}
.s-site-foot ul{list-style:none;padding:0}
.s-fine{color:var(--mut);font-size:.88rem}
.s-site-foot .s-foot-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}
.s-container.s-foot-cols{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px}@media(max-width:960px){.s-container.s-foot-cols{grid-template-columns:1fr}}.s-cards{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.s-card.s-lead-card{grid-column:span 2;grid-row:span 2}.s-card.s-lead-card .s-thumb{height:330px}.s-card.s-lead-card h3{font-size:1.5rem}@media(max-width:760px){.s-cards{grid-template-columns:1fr}.s-card.s-lead-card{grid-column:auto;grid-row:auto}.s-card.s-lead-card .s-thumb{height:200px}}.s-rubric{display:inline-block;margin:12px 16px 0;padding:2px 8px;border-radius:99px;background:var(--acc);color:var(--on-acc);font-size:.75rem;letter-spacing:.03em;text-transform:uppercase}.s-side-col li{display:grid;grid-template-columns:96px 1fr;gap:10px;align-items:center;margin:0 0 12px}.s-side-col .s-thumb{height:60px;border-radius:var(--r)}
.s-top-block{text-align:center}.s-top .s-ribbon .s-links{justify-content:center}