:root{--ink:#1f2430;--muted:#5b6170;--line:#e3e6ec;--bg:#fafbfc;--card:#fff;--ac:#0f9d74;--ac-d:#0b6b50;--ac-l:#e3f5ee;--warn:#b26a00;--warn-l:#fff4e0;--bad:#b3261e;--bad-l:#fde8e7;--r:12px;
--font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
a{color:var(--ac-d)}
a:hover{color:var(--ac)}
img{max-width:100%;height:auto}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:9}
header.site{background:#fff;border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--ink);text-decoration:none}
.brand svg{flex:none}
nav.main a{margin-left:18px;text-decoration:none;color:var(--muted);font-weight:500;font-size:15px}
nav.main a:hover,nav.main a[aria-current=page]{color:var(--ac-d)}
main{padding:28px 0 56px}
h1{font-size:clamp(28px,4vw,40px);line-height:1.2;margin:.2em 0 .4em;letter-spacing:-.01em}
h2{font-size:24px;line-height:1.3;margin:1.8em 0 .5em}
h3{font-size:19px;margin:1.4em 0 .4em}
p.lead{font-size:19px;color:var(--muted);margin-top:0}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:6px}
.crumbs a{color:var(--muted)}
.hero{background:linear-gradient(135deg,#0b6b50,#0f9d74);color:#fff;border-radius:18px;padding:44px 36px;margin-bottom:36px}
.hero h1{color:#fff;margin-top:0}
.hero p{color:#e6fff6;font-size:19px;max-width:640px}
.btn{display:inline-block;background:var(--ac);color:#fff;text-decoration:none;font-weight:600;padding:11px 20px;border-radius:10px;border:0;font-size:16px;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--ac-d);color:#fff}
.btn.light{background:#fff;color:var(--ac-d)}
.btn.light:hover{background:#e3f5ee;color:var(--ac-d)}
.btn.ghost{background:transparent;color:var(--ac-d);border:1.5px solid var(--ac)}
.btn.ghost:hover{background:var(--ac-l)}
.btn.small{padding:6px 12px;font-size:14px}
.hero .btn{margin:8px 10px 0 0}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.card h3{margin-top:0}
.card p{margin:.4em 0;color:var(--muted)}
a.card{display:block;text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}
a.card:hover{border-color:var(--ac);box-shadow:0 4px 16px rgba(15,157,116,.12)}
.tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--ac-d);background:var(--ac-l);border-radius:6px;padding:2px 8px;margin-bottom:8px}
.tag.own{color:#6b3fa0;background:#f1e9fb}
section.block{margin:44px 0}
section.block>h2{margin-top:0}
/* article */
article.guide{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px clamp(18px,4vw,44px)}
article.guide .meta{font-size:14px;color:var(--muted);margin-bottom:18px}
article.guide table{border-collapse:collapse;width:100%;margin:12px 0 18px;font-size:15px}
article.guide th,article.guide td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
article.guide th{background:#f4f6f8}
.note{background:var(--ac-l);border-left:4px solid var(--ac);padding:12px 16px;border-radius:8px;margin:18px 0;font-size:16px}
.note.warn{background:var(--warn-l);border-color:var(--warn)}
pre,code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14.5px}
pre{background:#f4f6f8;border-radius:8px;padding:14px;overflow:auto;white-space:pre-wrap}
.sources{font-size:15px;color:var(--muted);border-top:1px solid var(--line);margin-top:32px;padding-top:12px}
.sources li{margin:4px 0}
.toc{background:#f7f8fa;border-radius:10px;padding:12px 18px;font-size:15px}
.toc ol{margin:6px 0;padding-left:20px}
/* product recommendation */
.promo{display:flex;gap:18px;align-items:flex-start;background:#fff;border:1.5px solid var(--ac);border-radius:var(--r);padding:20px;margin:28px 0}
.promo .ico{flex:none;width:52px;height:52px;border-radius:12px;background:var(--ac-l);display:grid;place-items:center;font-size:26px}
.promo h3{margin:0 0 4px}
.promo p{margin:.3em 0 .7em;color:var(--muted);font-size:16px}
.promo small{display:block;color:var(--muted);font-size:13px;margin-top:8px}
/* tool */
.tool{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:24px;align-items:start}
@media (max-width:860px){.tool{grid-template-columns:1fr}}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px}
.panel h2{margin:0 0 12px;font-size:20px}
.field{margin-bottom:14px}
.field label{display:block;font-weight:600;font-size:15px;margin-bottom:4px}
.field .hint{display:block;font-weight:400;color:var(--muted);font-size:13.5px}
.field input,.field select{width:100%;padding:10px 12px;border:1.5px solid #cfd4dc;border-radius:9px;font-size:16px;font-family:inherit;background:#fffef5}
.field input:focus,.field select:focus{outline:none;border-color:var(--ac);box-shadow:0 0 0 3px rgba(15,157,116,.15)}
.field input[aria-invalid=true]{border-color:var(--bad);background:var(--bad-l)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
@media (max-width:520px){.row2,.row3{grid-template-columns:1fr}}
.results{position:sticky;top:16px}
.big{background:var(--ac-l);border-radius:10px;padding:16px;margin-bottom:12px}
.big .lbl{font-size:14px;color:var(--ac-d);font-weight:600}
.big .val{font-size:36px;font-weight:800;color:var(--ac-d);line-height:1.15}
.big .sub{font-size:14px;color:var(--muted)}
dl.out{margin:0;display:grid;grid-template-columns:1fr auto;gap:6px 12px;font-size:15.5px}
dl.out dt{color:var(--muted)}
dl.out dd{margin:0;font-weight:700;text-align:right;font-variant-numeric:tabular-nums}
dl.out .sep{grid-column:1/-1;border-top:1px solid var(--line);margin:4px 0}
.err{color:var(--bad);font-size:14.5px;margin:8px 0 0}
.verdict{border-radius:10px;padding:12px 14px;margin:12px 0;font-weight:600;font-size:15.5px}
.verdict.ok{background:var(--ac-l);color:var(--ac-d)}
.verdict.warn{background:var(--warn-l);color:var(--warn)}
.verdict.bad{background:var(--bad-l);color:var(--bad)}
table.phases{width:100%;border-collapse:collapse;margin-bottom:10px}
table.phases th{font-size:13.5px;text-align:left;color:var(--muted);font-weight:600;padding:4px}
table.phases td{padding:4px}
table.phases input{width:100%;padding:8px 10px;border:1.5px solid #cfd4dc;border-radius:8px;font-size:15.5px;font-family:inherit;background:#fffef5}
table.phases td.x{width:40px}
.icon-btn{background:none;border:1px solid var(--line);border-radius:8px;width:34px;height:34px;cursor:pointer;color:var(--muted);font-size:18px;line-height:1}
.icon-btn:hover{color:var(--bad);border-color:var(--bad)}
.check{display:flex;gap:8px;align-items:flex-start;font-size:15px;margin:6px 0 12px}
.check input{margin-top:5px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.copied{font-size:14px;color:var(--ac-d);align-self:center}
/* footer */
footer.site{border-top:1px solid var(--line);background:#fff;padding:28px 0;font-size:14.5px;color:var(--muted)}
footer.site .cols{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
footer.site a{color:var(--muted);margin-right:14px}
footer.site p{margin:.3em 0}
.disclaimer{font-size:14px;color:var(--muted)}
@media print{header.site,footer.site,.promo,.actions,nav{display:none}body{background:#fff}}
@media (max-width:640px){header.site .wrap{padding-top:10px;padding-bottom:6px;gap:6px}nav.main{display:flex;gap:16px;overflow-x:auto;white-space:nowrap;width:100%;padding-bottom:6px}nav.main a{margin-left:0;font-size:14.5px}.hero{padding:30px 22px}}