:root{--bg:#f6f7fb;--card:#fff;--ink:#111827;--mute:#4b5563;--line:#e5e7eb;--pri:#1d4ed8;--pri2:#1e40af;--ok:#047857;--bad:#b91c1c;--sans:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font:16px/1.6 var(--sans);color:var(--ink);background:var(--bg)}
a{color:var(--pri)}a:hover{color:var(--pri2)}img{max-width:100%}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:9}
header.top{background:#fff;border-bottom:1px solid var(--line)}
.wrap{max-width:1100px;margin:0 auto;padding:0 16px}
.bar{display:flex;align-items:center;justify-content:space-between;min-height:60px;gap:12px}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:20px;color:var(--ink);text-decoration:none}.logo img{width:30px;height:30px}
nav#nav{display:flex;gap:4px;flex-wrap:wrap}nav#nav a{padding:6px 10px;border-radius:8px;text-decoration:none;color:var(--mute);font-size:15px}nav#nav a:hover,nav#nav a[aria-current]{background:#eef2ff;color:var(--pri2)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:15px;cursor:pointer}
@media(max-width:900px){.menu-btn{display:block}nav#nav{display:none;position:absolute;left:0;right:0;top:60px;background:#fff;flex-direction:column;padding:8px 16px;border-bottom:1px solid var(--line);z-index:5}nav#nav.open{display:flex}header.top{position:relative}}
main{display:block;padding:8px 0 24px}
h1{font-size:clamp(26px,4vw,36px);line-height:1.2;margin:18px 0 6px}h2{font-size:22px;margin:28px 0 8px}h3{font-size:18px;margin:20px 0 6px}
.lead{color:var(--mute);margin:0 0 16px;font-size:17px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.tool{margin:12px 0}
table.rows{width:100%;border-collapse:collapse}table.rows th{font-size:13px;text-align:left;color:var(--mute);font-weight:600;padding:4px}table.rows td{padding:4px}
input,select{font:inherit;width:100%;padding:9px 10px;border:1px solid #cbd5e1;border-radius:8px;background:#fff;color:var(--ink);min-height:42px}
input:focus,select:focus,button:focus-visible{outline:3px solid #93c5fd;outline-offset:1px}
label{font-size:14px;font-weight:600;color:var(--mute);display:block;margin-bottom:4px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.btn{font:inherit;border:0;border-radius:8px;padding:10px 16px;background:var(--pri);color:#fff;cursor:pointer;font-weight:600;min-height:42px}.btn:hover{background:var(--pri2)}
.btn.ghost{background:#eef2ff;color:var(--pri2)}.btn.x{background:none;color:var(--bad);padding:6px 10px;font-size:20px;line-height:1}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.result{margin-top:14px;padding:14px 16px;border-radius:12px;background:#eff6ff;border:1px solid #bfdbfe}
.result .big{font-size:32px;font-weight:800;color:var(--pri2);line-height:1.1}.result .sub{color:var(--mute);font-size:15px}
.result.warn{background:#fef2f2;border-color:#fecaca}.result.warn .big{color:var(--bad)}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;align-items:start}
@media(max-width:960px){.layout{grid-template-columns:1fr}}
aside.side .card{margin-bottom:16px}aside.side ul{margin:0;padding-left:18px}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:12px 0}
.tile{display:block;text-decoration:none;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px}.tile:hover{border-color:var(--pri)}.tile b{display:block;color:var(--pri2)}.tile span{font-size:14px;color:var(--mute)}
.ref{border-collapse:collapse;width:100%;font-size:15px;background:#fff}.ref th,.ref td{border:1px solid var(--line);padding:6px 8px;text-align:left}.ref th{background:#f1f5f9}
.prose{max-width:760px}.prose p,.prose li{color:#1f2937}
details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:8px 0}summary{font-weight:600;cursor:pointer}
.crumbs{font-size:14px;color:var(--mute);margin-top:12px}.crumbs a{color:var(--mute)}
footer.foot{background:#0f172a;color:#cbd5e1;margin-top:32px;padding:28px 0;font-size:15px}footer.foot a{color:#e2e8f0}
.fcols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}.fcols h3{color:#fff;font-size:16px;margin:0 0 8px}.fcols ul{list-style:none;margin:0;padding:0}.fcols li{margin:4px 0}
.copy{margin-top:20px;border-top:1px solid #1e293b;padding-top:14px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.visits{font-size:14px}
@media(max-width:600px){table.rows thead{display:none}table.rows tr{display:grid;grid-template-columns:1fr 1fr auto;gap:6px;padding:8px 0;border-bottom:1px solid var(--line)}table.rows td{padding:0}table.rows td:first-child{grid-column:1/-1}}