:root{--ink:#16202c;--muted:#5b6776;--line:#e3e8ef;--bg:#f6f8fb;--card:#fff;--brand:#0b6e4f;--brand2:#0f8a63;--accent:#f2b134;--warn:#b54708}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font:16px/1.6 -apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand)}
.wrap{max-width:860px;margin:0 auto;padding:0 18px}
header.top{background:#fff;border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none}.logo span{color:var(--brand)}
nav a{margin-left:16px;font-size:14px;color:var(--muted);text-decoration:none}nav a:hover{color:var(--brand)}
h1{font-size:30px;line-height:1.25;margin:28px 0 8px}
h2{font-size:22px;margin:32px 0 10px}
h3{font-size:17px;margin:20px 0 6px}
p,li{margin:8px 0}ul,ol{padding-left:22px}
.lead{color:var(--muted);font-size:17px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;margin:20px 0;box-shadow:0 1px 2px rgba(16,24,40,.04)}
.calc label{display:block;font-weight:600;font-size:14px;margin:14px 0 6px}
.calc input,.calc select{width:100%;padding:11px 12px;border:1px solid #cdd5df;border-radius:10px;font-size:16px;background:#fff}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.seg{display:flex;gap:8px;flex-wrap:wrap}.seg label{flex:1;min-width:140px;margin:0;border:1px solid #cdd5df;border-radius:10px;padding:10px 12px;font-weight:500;cursor:pointer}
.seg input{width:auto;margin-right:8px}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:500 !important}.check input{width:auto;margin-top:4px}
button.go{margin-top:18px;width:100%;padding:13px;border:0;border-radius:10px;background:var(--brand);color:#fff;font-size:17px;font-weight:700;cursor:pointer}
button.go:hover{background:var(--brand2)}
.result{display:none;margin-top:18px;border-radius:12px;background:#ecf8f2;border:1px solid #b7e4cd;padding:18px}
.result.show{display:block}
.result .big{font-size:28px;font-weight:800;color:var(--brand)}
.result .why{color:var(--muted);font-size:14px;margin-top:8px}
.result.err{background:#fff4ed;border-color:#f7c8a6}.result.err .big{color:var(--warn);font-size:18px}
table{width:100%;border-collapse:collapse;margin:12px 0;font-size:15px}th,td{border-bottom:1px solid var(--line);padding:9px 6px;text-align:left}th{background:#f1f4f8}
.note{font-size:13px;color:var(--muted)}
.tools{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.tools a{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:var(--ink)}
.tools a b{display:block;color:var(--brand);margin-bottom:4px}.tools a.soon{opacity:.55;pointer-events:none}
footer{margin-top:50px;padding:26px 0;border-top:1px solid var(--line);background:#fff;font-size:14px;color:var(--muted)}
footer a{color:var(--muted);margin-right:14px}
.ad{margin:22px 0;min-height:0}
@media(max-width:600px){.row{grid-template-columns:1fr}h1{font-size:25px}
header.top .wrap{flex-wrap:wrap;height:auto;padding-top:10px;padding-bottom:8px}
nav{width:100%;display:flex;gap:16px;margin-top:4px}nav a{margin-left:0}}
th,td{overflow-wrap:anywhere}