:root{
  --bg:#f4f5fa;--card:#fff;--ink:#171a26;--muted:#5d6478;--line:#e4e6ef;
  --acc:#4f46e5;--acc2:#7c3aed;--rad:14px;
  --sh:0 1px 2px rgba(16,20,40,.06),0 8px 24px rgba(16,20,40,.06);
}
*{box-sizing:border-box}
body{margin:0;font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}

/* header */
.hdr{background:#12141d;color:#fff;border-bottom:1px solid rgba(255,255,255,.07)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:58px}
.logo{display:flex;gap:10px;align-items:center;color:#fff;font-weight:700;font-size:17px}
.logo:hover{text-decoration:none}
.logo .mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--acc),var(--acc2));display:grid;place-items:center;font-size:15px;color:#fff}
.hdr nav a{color:#c9cddc;margin-left:18px;font-size:14.5px}
.hdr nav a:hover{color:#fff;text-decoration:none}

/* hero */
.hero{padding:52px 0 26px;text-align:center}
.hero h1{font-size:clamp(28px,5vw,42px);margin:0 0 12px;letter-spacing:-.02em}
.hero p.sub{font-size:clamp(16px,2.4vw,19px);color:var(--muted);max-width:720px;margin:0 auto 22px}
.badge{display:inline-block;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;font-size:13px;padding:5px 13px;border-radius:99px;margin-bottom:14px}
.search{max-width:560px;margin:0 auto}
.search input{width:100%;padding:14px 18px;border-radius:99px;border:1px solid var(--line);font-size:16px;box-shadow:var(--sh)}
.search input:focus{outline:2px solid var(--acc);border-color:transparent}

/* sections */
section{padding:24px 0}
h2.sec{font-size:24px;margin:12px 0 18px;letter-spacing:-.01em}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:18px;color:var(--ink);transition:.15s;box-shadow:var(--sh);display:block}
.card:hover{transform:translateY(-3px);border-color:#c9c6ff;text-decoration:none}
.card .ico{width:42px;height:42px;border-radius:11px;background:#eef0ff;color:var(--acc);display:grid;place-items:center;margin-bottom:12px}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:14px}
.card.hidden{display:none}
.why{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.why div{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:18px}
.why h3{margin:0 0 8px;font-size:16.5px}
.why p{margin:0;color:var(--muted);font-size:14.5px}

/* tool page */
.bc{font-size:14px;color:var(--muted);padding:18px 0 0}
.bc a{color:var(--muted)}
.tool-head{padding:14px 0 4px;max-width:800px}
.tool-head h1{font-size:clamp(24px,4vw,32px);margin:0 0 8px;letter-spacing:-.01em}
.tool-head p{color:var(--muted);margin:0}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:22px;margin:18px 0;box-shadow:var(--sh)}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.fl{font-size:13.5px;color:var(--muted);display:block;margin-bottom:6px;font-weight:600}
input[type=number],input[type=text],select,textarea{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);max-width:100%}
textarea{width:100%;min-height:150px;resize:vertical;font-family:ui-monospace,Consolas,monospace;font-size:14px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--acc);border-color:transparent}
.btn{appearance:none;border:0;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;font:inherit;font-weight:600;padding:11px 20px;border-radius:10px;cursor:pointer;white-space:nowrap}
.btn:hover{filter:brightness(1.07)}
.btn.ghost{background:#eef0ff;color:var(--acc)}
.btn.sm{padding:8px 14px;font-size:14px}
.out{background:#f8f9fe;border:1px dashed #cdd2f4;border-radius:10px;padding:14px;font-family:ui-monospace,Consolas,monospace;font-size:15px;word-break:break-all;min-height:52px;white-space:pre-wrap}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:720px){.grid2{grid-template-columns:1fr}.hdr nav{display:none}}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(135px,1fr));gap:12px}
.stat{background:#f8f9fe;border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.stat b{display:block;font-size:24px}
.stat span{font-size:13px;color:var(--muted)}
.checks label{display:flex;gap:8px;align-items:center;font-size:15px;margin:7px 0;cursor:pointer}
.range-row{display:flex;align-items:center;gap:14px}
input[type=range]{flex:1;accent-color:var(--acc);height:28px}
.strength{height:8px;border-radius:99px;background:#eceef7;overflow:hidden;margin-top:10px}
.strength i{display:block;height:100%;width:0;background:linear-gradient(95deg,#ef4444,#f59e0b,#22c55e);transition:.25s}
.msg{font-size:14px;padding:9px 12px;border-radius:8px;margin-top:10px}
.msg.ok{background:#ecfdf5;color:#047857}
.msg.err{background:#fef2f2;color:#b91c1c}
.faq{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:6px 22px;margin:22px 0}
.faq h3{font-size:16.5px;margin:18px 0 6px}
.faq p{margin:0 0 14px;color:var(--muted);font-size:15px}
.related{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0 4px}
.related a{background:#eef0ff;padding:8px 14px;border-radius:99px;font-size:14px}
.textblock{max-width:800px;color:var(--muted);font-size:15.5px}
.textblock h2{color:var(--ink)}
.note{font-size:13.5px;color:var(--muted)}

/* footer */
footer{margin-top:44px;background:#12141d;color:#9aa1b8;padding:34px 0;font-size:14.5px}
footer a{color:#c9cddc;margin-right:14px;display:inline-block}
footer .fw{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer p{margin:8px 0 0;max-width:580px}