:root{
  --bg:#f5f8fd; --fg:#0f2033; --muted:#5a6b82;
  --card:#fff; --border:#e3ebf5; --accent:#2196F3; --accent-dark:#1976D2;
}
*{box-sizing:border-box}
body{margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--bg);color:var(--fg)}
@keyframes shimmer{0%{background-position:-200% center}100%{background-position:200% center}}
.hero{position:relative;max-width:960px;margin:0 auto;padding:56px 20px 28px;text-align:center}
.hero h1{margin:0 0 12px;font-size:42px;letter-spacing:-1px;line-height:1.15;
  background:linear-gradient(90deg,var(--accent),#64b5f6 25%,var(--accent-dark) 50%,#64b5f6 75%,var(--accent));
  background-size:200% auto;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:shimmer 5s linear infinite}
.hero .tagline{display:inline-block;margin:0 auto 8px;padding:6px 16px;border-radius:999px;
  background:rgba(33,150,243,.08);border:1px solid rgba(33,150,243,.15);
  color:var(--accent);font-size:13px;font-weight:600;letter-spacing:.3px}
.hero p{margin:0;color:var(--muted);font-size:16px}
.grid{max-width:960px;margin:0 auto;padding:20px;
  display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}
.card{position:relative;display:block;padding:22px;border:1px solid var(--border);
  border-radius:14px;background:var(--card);color:inherit;text-decoration:none;
  box-shadow:0 1px 2px rgba(15,32,51,.04);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.card::before{content:"";position:absolute;inset:0;border-radius:14px;padding:1px;pointer-events:none;
  background:linear-gradient(135deg,var(--accent),var(--accent-dark));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.18s}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(33,150,243,.15);border-color:transparent}
.card:hover::before{opacity:1}
.icon{display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:10px;font-size:22px;margin-bottom:12px;
  background:linear-gradient(135deg,var(--accent),var(--accent-dark));color:#fff}
.card h2{margin:0 0 4px;font-size:17px;color:var(--fg)}
.card p{margin:0;color:var(--muted);font-size:14px}
footer{max-width:960px;margin:40px auto 20px;padding:0 20px;color:var(--muted);text-align:center}
.tool{max-width:720px;margin:0 auto;padding:24px 20px}
.tool a.back{color:var(--accent);text-decoration:none}
.tool h1{margin:12px 0 8px;font-size:26px}
.tool p.lead{color:var(--muted);margin:0 0 20px}
.field{display:block;margin:12px 0}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
input,textarea,button{font:inherit;color:inherit;
  background:var(--card);border:1px solid var(--border);border-radius:8px;padding:10px 12px;width:100%}
textarea{min-height:80px;resize:vertical}
input:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(33,150,243,.15)}
button{cursor:pointer;color:#fff;border-color:transparent;width:auto;padding:10px 20px;
  background:linear-gradient(135deg,var(--accent),var(--accent-dark));font-weight:600}
button:hover{filter:brightness(1.05);box-shadow:0 6px 16px rgba(33,150,243,.3)}
.output{margin-top:20px;padding:16px;background:var(--card);border:1px solid var(--border);border-radius:8px;white-space:pre-wrap;word-break:break-word}
.tag{display:inline-block;padding:4px 10px;margin:3px;background:var(--card);border:1px solid var(--border);border-radius:999px;font-size:13px}