:root{
  --bg:#f6f7f9;
  --card:#ffffff;
  --text:#101114;
  --muted:#686d76;
  --line:#e6e8ec;
  --soft:#f0f2f5;
  --accent:#111827;
  --radius:22px;
  --shadow:0 18px 60px rgba(16,17,20,.07);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
button,input,textarea{font:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
.container{width:min(1120px,calc(100% - 36px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(230,232,236,.8);background:rgba(246,247,249,.88);backdrop-filter:blur(18px)}
.nav{height:72px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;letter-spacing:-.02em}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800}
.nav-links{display:flex;gap:26px;color:var(--muted);font-size:14px}
.nav-links a:hover{color:var(--text)}
.hero{padding:112px 0 84px}
.hero-inner{max-width:810px;text-align:center}
.eyebrow{display:inline-block;font-size:12px;text-transform:uppercase;letter-spacing:.16em;color:var(--muted);font-weight:750;margin-bottom:16px}
h1,h2,h3{margin:0;letter-spacing:-.045em;line-height:1.03}
h1{font-size:clamp(54px,8vw,94px)}
h2{font-size:clamp(38px,5vw,58px)}
h3{font-size:34px}
.hero p{max-width:650px;margin:24px auto 0;color:var(--muted);font-size:19px}
.hero-actions{display:flex;gap:12px;justify-content:center;margin-top:34px}
.btn{border:1px solid var(--line);padding:12px 17px;border-radius:13px;background:#fff;color:var(--text);font-weight:700;display:inline-flex;align-items:center;justify-content:center;transition:.18s ease}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:var(--accent);color:white;border-color:var(--accent)}
.btn.secondary{background:white}
.btn.full{width:100%;margin-top:12px}
.trust-row{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;margin-top:28px;color:var(--muted);font-size:13px}
.section{padding:92px 0}
.section.muted{background:#eef0f3}
.section-head{display:grid;grid-template-columns:1fr 420px;gap:40px;align-items:end;margin-bottom:34px}
.section-head p{margin:0;color:var(--muted)}
.tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.tool-card{text-align:left;border:1px solid var(--line);background:rgba(255,255,255,.72);padding:18px;border-radius:18px;display:flex;gap:14px;min-height:112px;transition:.18s ease;color:var(--text)}
.tool-card:hover,.tool-card.active{border-color:#c6cad1;background:#fff;box-shadow:0 10px 30px rgba(16,17,20,.05);transform:translateY(-2px)}
.tool-card .icon{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--soft);font-weight:800;flex:0 0 auto}
.tool-card strong{display:block;font-size:14px;margin-top:1px}
.tool-card small{display:block;color:var(--muted);margin-top:5px;line-height:1.35}
.workspace{margin-top:22px;background:var(--card);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);overflow:hidden}
.tool-panel{display:none;padding:34px}
.tool-panel.active{display:block}
.panel-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;margin-bottom:28px}
.status{font-size:12px;border:1px solid var(--line);background:var(--soft);padding:7px 10px;border-radius:999px;color:var(--muted)}
label{display:block;font-size:13px;font-weight:700;margin:0 0 8px}
textarea,input[type="text"],input[type="number"],input[type="datetime-local"],input[readonly],input:not([type]){width:100%;border:1px solid var(--line);background:#fafbfc;border-radius:14px;padding:14px 15px;outline:none;color:var(--text)}
textarea:focus,input:focus{border-color:#aeb4bd;box-shadow:0 0 0 3px rgba(17,24,39,.05)}
textarea{resize:vertical}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.qr-output{margin-top:22px;min-height:240px;border:1px dashed #d4d7dc;border-radius:18px;display:grid;place-items:center;background:#fbfcfd;padding:22px}
#qrcode img,#qrcode canvas{max-width:220px!important;width:100%!important;height:auto!important}
.form-grid.two{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.checks{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-content:center}
.checks label{font-weight:600;margin:0}
.copy-row{display:flex;gap:10px}
.copy-row input{flex:1}
.copy-btn{white-space:nowrap}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:14px}
.stats div{background:var(--soft);border-radius:16px;padding:17px}
.stats strong{display:block;font-size:26px;letter-spacing:-.03em}
.stats span{color:var(--muted);font-size:12px}
.result-box{margin-top:22px;padding:18px;border-radius:16px;background:var(--soft);white-space:pre-wrap}
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px}
.prose{color:var(--muted);font-size:16px}
.prose p:first-child{margin-top:0}
.contact-card{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:34px;display:flex;justify-content:space-between;gap:30px;align-items:center}
.contact-card p{color:var(--muted);margin-bottom:0}
footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:13px}
.footer-inner{display:flex;justify-content:space-between;gap:20px}
.footer-inner div{display:flex;gap:18px}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:#111827;color:#fff;border-radius:12px;padding:10px 14px;font-size:13px;opacity:0;pointer-events:none;transition:.2s ease;z-index:100}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:900px){
  .tool-grid{grid-template-columns:repeat(2,1fr)}
  .section-head,.info-grid{grid-template-columns:1fr}
  .section-head{gap:16px}
}
@media(max-width:640px){
  .nav-links{display:none}
  .hero{padding:82px 0 62px}
  h1{font-size:52px}
  .tool-grid{grid-template-columns:1fr}
  .tool-card{min-height:auto}
  .tool-panel{padding:22px}
  .panel-head{display:block}
  .panel-head .status{display:inline-block;margin-top:14px}
  .form-grid.two,.stats{grid-template-columns:1fr}
  .checks{grid-template-columns:1fr}
  .contact-card,.footer-inner{flex-direction:column;align-items:flex-start}
  .hero-actions{flex-direction:column;align-items:stretch}
}