*{box-sizing:border-box}body{margin:0;font:17px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1d2a33;background:#f6f8fa}
header{background:#0b4f6c;color:#fff}header .w{display:flex;flex-wrap:wrap;gap:.5rem 1.2rem;align-items:center;padding:.8rem 1rem}
header a{color:#fff;text-decoration:none}.logo{font-weight:700;font-size:1.15rem;margin-right:auto}nav{display:flex;flex-wrap:wrap;gap:.3rem 1rem}nav a{opacity:.9}nav a:hover{opacity:1;text-decoration:underline}
.w{max-width:860px;margin:0 auto;padding:1rem}main .w{background:#fff;border-radius:10px;margin:1rem auto;box-shadow:0 1px 3px #0001}
h1{font-size:1.7rem;line-height:1.25;color:#0b4f6c}h2{color:#0b4f6c;font-size:1.3rem;margin-top:2rem}
a{color:#0a6f95}.calc{background:#eef6f9;border:1px solid #cfe3ea;border-radius:10px;padding:1rem}
label{display:block;font-weight:600;margin:.7rem 0 .2rem}input,select{width:100%;padding:.6rem;font-size:1rem;border:1px solid #9bb;border-radius:6px;background:#fff}
button{margin-top:1rem;background:#0b4f6c;color:#fff;border:0;padding:.75rem 1.2rem;font-size:1rem;border-radius:6px;cursor:pointer;width:100%}
.res{margin-top:1rem;background:#fff;border-left:4px solid #0b4f6c;padding:.8rem 1rem;display:none}.warn{background:#fff7e0;border-left:4px solid #e0a400;padding:.7rem 1rem;margin:1rem 0}
small,.src{font-size:.88rem;color:#4a5a66}footer{text-align:center;font-size:.85rem;color:#4a5a66;padding:1.5rem 1rem}table{border-collapse:collapse;width:100%}td,th{border:1px solid #d5dde2;padding:.45rem;text-align:left;vertical-align:top}
@media(min-width:640px){.g2{display:grid;grid-template-columns:1fr 1fr;gap:0 1rem}button{width:auto}}