:root{
  --bg:#f8fafc;--card:#ffffff;--text:#0f172a;--muted:#475569;--border:#e2e8f0;
  --accent:#2563eb;--accent-dark:#1d4ed8;--shadow:0 10px 30px rgba(15,23,42,.08);
  --radius:18px;--max:1120px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:linear-gradient(180deg,#eff6ff 0%,var(--bg) 180px);line-height:1.55}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
.container{width:min(100% - 2rem,var(--max));margin:0 auto}
header{position:sticky;top:0;z-index:40;backdrop-filter:blur(12px);background:rgba(248,250,252,.88);border-bottom:1px solid rgba(226,232,240,.8)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:.9rem 0;gap:1rem}
.brand{display:flex;align-items:center;gap:.7rem;font-weight:800;letter-spacing:-.02em;color:var(--text)}
.brand-badge{width:38px;height:38px;display:grid;place-items:center;border-radius:12px;color:#fff;font-weight:800;background:linear-gradient(135deg,var(--accent),#7c3aed);box-shadow:var(--shadow)}
nav ul{margin:0;padding:0;list-style:none;display:flex;gap:1rem;flex-wrap:wrap;justify-content:flex-end}
nav a{color:var(--muted);font-weight:600;text-decoration:none}
.hero{padding:3rem 0 1.5rem}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:1.2rem;align-items:stretch}
.hero-card,.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-copy,.converter,.card{padding:1.25rem}
.eyebrow{display:inline-flex;align-items:center;gap:.45rem;padding:.35rem .7rem;border-radius:999px;background:#dbeafe;color:#1e3a8a;font-size:.9rem;font-weight:700;margin-bottom:1rem}
h1,h2,h3{line-height:1.1;letter-spacing:-.03em;margin:0 0 .8rem} h1{font-size:clamp(2rem,4vw,3.1rem)} h2{font-size:clamp(1.4rem,2vw,2rem)} h3{font-size:1.05rem}
.lead{font-size:1.05rem;color:var(--muted);max-width:58ch}.hero-points{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1rem}
.chip{background:#f1f5f9;border:1px solid var(--border);color:var(--text);padding:.6rem .85rem;border-radius:999px;font-size:.94rem;font-weight:600}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}.field{display:grid;gap:.45rem;margin-bottom:.8rem}
label{font-size:.92rem;font-weight:700;color:var(--muted)}
select,input,button{width:100%;border-radius:14px;border:1px solid var(--border);padding:.95rem 1rem;font:inherit;background:#fff;color:var(--text)}
input:focus,select:focus,button:focus{outline:3px solid rgba(37,99,235,.15);border-color:var(--accent)}
button{cursor:pointer;border:none;background:var(--accent);color:#fff;font-weight:800;transition:.2s ease}
button:hover{background:var(--accent-dark)} .actions{display:flex;gap:.75rem;margin-top:.2rem}.actions .secondary{background:#e2e8f0;color:var(--text)}
.result{margin-top:1rem;padding:1rem;border-radius:14px;background:#eff6ff;border:1px solid #bfdbfe}.result strong{display:block;font-size:1.15rem;margin-top:.2rem}
.small{font-size:.92rem;color:var(--muted)} section{padding:1rem 0 2rem}
.cards,.related-links,.popular-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}
.related-links a,.popular-links a{display:block;padding:1rem 1.05rem;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);color:var(--text);font-weight:700;text-decoration:none}
.related-links a span,.popular-links a span{display:block;color:var(--muted);font-weight:500;font-size:.93rem;margin-top:.2rem}
.copy-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem} footer{padding:2.5rem 0 4rem;color:var(--muted)}
.footer-grid{display:grid;grid-template-columns:1fr auto;gap:1rem;align-items:center;border-top:1px solid var(--border);padding-top:1.4rem}
.category-section{margin-bottom:1.25rem}
@media (max-width: 920px){.hero-grid,.cards,.related-links,.popular-links,.copy-grid,.footer-grid{grid-template-columns:1fr}.grid-2{grid-template-columns:1fr}nav ul{display:none}}