:root{
  --bg:#f7f7fb;--surface:#fff;--text:#16161d;--muted:#66677a;
  --border:#e6e6ef;--accent:#6d4aff;--accent2:#3d2bb8;
}
*{box-sizing:border-box}
html{font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}
body{margin:0;line-height:1.55}
a{color:inherit}
.container{width:min(1080px,calc(100% - 32px));margin:auto}
header{background:#fff;border-bottom:1px solid var(--border)}
.nav{height:68px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{font-weight:800;font-size:1.3rem;text-decoration:none}
.brand span{color:var(--accent)}
.lang{display:flex;gap:8px}
.lang a{padding:7px 10px;border:1px solid var(--border);border-radius:999px;text-decoration:none}
.hero{padding:70px 0 40px}
h1{font-size:clamp(2.4rem,6vw,4.4rem);line-height:1.04;letter-spacing:-.04em;margin:12px 0}
.lead{font-size:1.1rem;color:var(--muted);max-width:760px}
.eyebrow{font-weight:700;color:var(--accent2)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding:20px 0 50px}
.card{display:block;background:#fff;border:1px solid var(--border);border-radius:18px;padding:20px;text-decoration:none}
.card h3{margin:8px 0}
.card p{color:var(--muted);margin:0}
.calc{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding-bottom:40px}
.panel{background:#fff;border:1px solid var(--border);border-radius:18px;padding:22px}
.field{margin-bottom:14px}
label{display:block;font-weight:700;margin-bottom:6px}
input{width:100%;padding:12px;border:1px solid #d8d8e2;border-radius:10px;font-size:1rem}
button{width:100%;padding:13px;border:0;border-radius:10px;background:var(--accent);color:#fff;font-weight:700;font-size:1rem;cursor:pointer}
.result{font-size:2rem;font-weight:800;margin:6px 0 18px}
.small{color:var(--muted);font-size:.9rem}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.result-grid div{background:#f7f7fb;padding:12px;border-radius:10px}
footer{border-top:1px solid var(--border);padding:30px 0;color:var(--muted);margin-top:30px}
@media(max-width:760px){.grid,.calc{grid-template-columns:1fr}}