:root{--ink:#16171a;--muted:#5b5f68;--line:#e4e5e8;--bg:#f6f6f7;--card:#fff;--tile1:#3a3c42;--tile2:#121315;--accent:#ff3b30;--ok:#1a7f37;--warn:#9a6700;--bad:#c62828;--okbg:#e9f6ec;--warnbg:#fff6dd;--badbg:#fdecea;--radius:14px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:inherit}
a:focus-visible,button:focus-visible,textarea:focus-visible,input:focus-visible{outline:3px solid #2f6feb;outline-offset:2px}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;border-radius: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;text-decoration:none;font-weight:700;font-size:18px}
.brand img{width:34px;height:34px;border-radius:9px;display:block}
nav.top a{text-decoration:none;color:var(--muted);margin-left:18px;font-size:15px}
nav.top a:hover,nav.top a[aria-current]{color:var(--ink)}
.hero{padding:64px 0 40px}
.hero h1{font-size:clamp(32px,6vw,52px);line-height:1.1;margin:0 0 16px;letter-spacing:-.02em}
.hero p.lead{font-size:clamp(17px,2.2vw,20px);color:var(--muted);max-width:640px;margin:0 0 28px}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 20px;border-radius:10px;font-weight:600;text-decoration:none;border:1px solid transparent;font-size:16px;cursor:pointer;font-family:inherit}
.btn-primary{background:linear-gradient(180deg,var(--tile1),var(--tile2));color:#fff}
.btn-primary:hover{filter:brightness(1.15)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:#c9cbd0}
section{padding:36px 0}
h2{font-size:clamp(24px,3.4vw,30px);margin:0 0 18px;letter-spacing:-.01em}
h3{font-size:18px;margin:0 0 6px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card p{margin:0;color:var(--muted)}
.step{display:inline-flex;width:30px;height:30px;border-radius:8px;align-items:center;justify-content:center;background:linear-gradient(180deg,var(--tile1),var(--tile2));color:#fff;font-weight:700;margin-bottom:10px}
ul.ticks{list-style:none;padding:0;margin:0}
ul.ticks li{padding:10px 0 10px 28px;border-bottom:1px solid var(--line);position:relative}
ul.ticks li:last-child{border-bottom:0}
ul.ticks li::before{content:"";position:absolute;left:4px;top:19px;width:9px;height:9px;border-radius:50%;background:var(--accent)}
.banner{background:linear-gradient(135deg,var(--tile1),var(--tile2));color:#fff;border-radius:var(--radius);padding:28px;display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap}
.banner p{margin:0;font-size:18px;max-width:600px}
.banner .btn{background:#fff;color:var(--ink)}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}
summary{cursor:pointer;font-weight:600}
details p{margin:10px 0 0;color:var(--muted)}
footer.site{border-top:1px solid var(--line);background:#fff;margin-top:40px;padding:28px 0;font-size:14px;color:var(--muted)}
footer.site ul{list-style:none;padding:0;margin:0 0 12px;display:flex;flex-wrap:wrap;gap:6px 18px}
footer.site a{color:var(--muted)}
footer.site p{margin:6px 0}
/* checker */
form.checker{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
label{display:block;font-weight:600;margin:14px 0 6px}
label:first-child{margin-top:0}
label .hint{font-weight:400;color:var(--muted);font-size:14px}
input[type=text],textarea{width:100%;font:inherit;padding:10px 12px;border:1px solid #c9cbd0;border-radius:10px;background:#fff;color:var(--ink)}
textarea{min-height:90px;resize:vertical}
#keywords{min-height:130px}
.counter{font-size:13px;color:var(--muted);margin-top:4px}
.actions{margin-top:18px;display:flex;gap:12px;flex-wrap:wrap}
#results{margin-top:24px}
.summary{font-weight:600;margin:0 0 12px}
.res{list-style:none;padding:0;margin:0}
.res li{border-radius:10px;padding:12px 14px 12px 44px;margin-bottom:8px;position:relative;border:1px solid}
.res li::before{position:absolute;left:14px;top:11px;font-weight:700;width:20px;text-align:center}
.res .ok{background:var(--okbg);border-color:#b7e1c1}.res .ok::before{content:"\2713";color:var(--ok)}
.res .warn{background:var(--warnbg);border-color:#f0d58a}.res .warn::before{content:"!";color:var(--warn)}
.res .bad{background:var(--badbg);border-color:#f3b9b4}.res .bad::before{content:"\2715";color:var(--bad)}
.res .tip{background:#fff;border-color:var(--line)}.res .tip::before{content:"i";color:var(--muted);font-style:italic}
.res .tag{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;margin-right:6px}
.res .ok .tag{color:var(--ok)}.res .warn .tag{color:var(--warn)}.res .bad .tag{color:var(--bad)}.res .tip .tag{color:var(--muted)}
.res .src{display:block;font-size:13px;color:var(--muted);margin-top:4px}
.res code{background:rgba(0,0,0,.06);padding:1px 5px;border-radius:5px;font-size:14px}
.cta{margin-top:20px}
.small{font-size:14px;color:var(--muted)}
table.rules{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:15px}
table.rules th,table.rules td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
table.rules th{background:#fafafb}
.tablewrap{overflow-x:auto}
[hidden]{display:none!important}
@media (max-width:600px){nav.top a{margin-left:12px}.hero{padding:40px 0 24px}}
.pt0{padding-top:0}.mt14{margin-top:14px}.mt18{margin-top:18px}