:root{--bg:#f6f7fb;--ink:#111827;--muted:#6b7280;--brand:#0f766e;--card:#fff;--line:#e5e7eb}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}.hero{background:linear-gradient(135deg,#0f766e,#134e4a);color:white;padding:28px 20px 56px}nav{max-width:980px;margin:0 auto 42px;display:flex;gap:18px;align-items:center}nav strong{margin-right:auto}nav a{color:white;text-decoration:none;opacity:.9}.hero h1,.hero p{max-width:980px;margin-left:auto;margin-right:auto}.hero h1{font-size:clamp(2rem,5vw,4rem);line-height:1.05;margin-bottom:12px}.hero p{font-size:1.15rem;max-width:700px;margin-left:calc((100% - 980px)/2);opacity:.95}main{max-width:980px;margin:-32px auto 40px;padding:0 20px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px;margin-bottom:20px;box-shadow:0 10px 25px rgba(15,23,42,.06)}.muted{color:var(--muted)}form{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}label{font-weight:700;font-size:.95rem}input{width:100%;margin-top:6px;padding:12px;border:1px solid var(--line);border-radius:10px;font-size:1rem}button{grid-column:1/-1;background:var(--brand);color:white;border:0;border-radius:12px;padding:14px 18px;font-weight:800;font-size:1rem;cursor:pointer}button:hover{filter:brightness(.95)}.result{margin-top:18px;padding:18px;border-radius:14px;background:#ecfdf5;border:1px solid #99f6e4}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.grid a{display:block;padding:14px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--brand);font-weight:700}footer{text-align:center;color:var(--muted);padding:30px 20px}@media(max-width:720px){form,.grid{grid-template-columns:1fr}nav{flex-wrap:wrap}.hero p{margin-left:auto}}