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0;border-top:0;flex-direction:column;gap:10px;padding:0;inset:50% auto auto 20px;transform:translateY(-50%)}.rail-btn{color:#fff;background:linear-gradient(135deg, var(--net-a), var(--net-b));border:1px solid var(--line);border-radius:var(--r);flex:none;width:46px;max-width:none;height:46px;box-shadow:0 4px 16px #0000004d}.rail-btn:hover{background:linear-gradient(135deg, var(--net-a), var(--net-b));transform:scale(1.12)translate(4px);box-shadow:0 10px 26px #0000006b}.rail-btn:focus-visible{border-radius:var(--r)}.rail-btn:after{content:attr(title);color:var(--ink);white-space:nowrap;border:1px solid var(--line-strong);border-radius:var(--r-sm);opacity:0;pointer-events:none;background:#0b1020f5;padding:.3rem .6rem;font-size:.76rem;font-weight:500;line-height:1.3;transition:opacity .18s;position:absolute;top:50%;left:calc(100% + 10px);transform:translateY(-50%)}.rail-btn:hover:after,.rail-btn:focus-visible:after{opacity:1}.site-foot{padding-bottom:2rem}}.rail-btn--copy.is-done{box-shadow:0 0 0 2px var(--go)}.ad-slot{min-height:1px;margin:2.6rem 0}.ad-slot ins{display:block}.ad-slot-label{color:var(--ink-3);letter-spacing:.09em;text-transform:uppercase;margin:0 0 .45rem;font-size:.68rem;font-weight:600}.ad-slot:has(ins[data-ad-status=unfilled]){display:none}@media print{.site-head,.site-foot,.toc,.ad-slot,.related,.band,.share-rail,.site-search,.page-report,.cse-results{display:none!important}body{color:#111;background:#fff}.doc-body,.doc-body p,.doc-body li{color:#111}.doc-grid{display:block}a{color:#111}a[href^=http]:after{content:" (" attr(href) ")";color:#555;font-size:.85em}}