*{box-sizing:border-box}body{margin:0;font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1d2330;background:#f6f7f9}
header,main{max-width:980px;margin:0 auto;padding:16px}h1{font-size:1.7rem;margin:.4em 0}.lede{font-size:1.05rem}.spec{font-size:.85rem;color:#4a5568}
form{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:12px}fieldset{border:1px solid #d5dae1;border-radius:8px;background:#fff;padding:10px 12px}
legend{font-weight:600}label{display:block;font-size:.9rem;margin:6px 0}input{display:block;width:100%;padding:6px 8px;border:1px solid #c3cad4;border-radius:6px;font:inherit}
#out{margin:18px 0;background:#fff;border:2px solid #2f6f5e;border-radius:10px;padding:14px}.big{font-size:1.5rem;font-weight:700;color:#2f6f5e}
table{width:100%;border-collapse:collapse;font-size:.92rem}th,td{padding:6px;border-bottom:1px solid #e3e7ec;text-align:left;vertical-align:top}td.n{text-align:right;white-space:nowrap}
.btn{display:inline-block;background:#2f6f5e;color:#fff;padding:7px 12px;border-radius:6px;text-decoration:none;margin:4px 4px 0 0;border:0;font:inherit;cursor:pointer}.btn.alt{background:#55606e}
button{font:inherit;padding:6px 10px;border-radius:6px;border:1px solid #9aa5b1;background:#fff;cursor:pointer}.lock{color:#6b7280;font-size:.85rem}
.buyline{background:#fff7e6;border:1px solid #f0d9a8;border-radius:8px;padding:10px}.key{margin:10px 0}.key input{display:inline-block;width:260px}
.small{font-size:.82rem;color:#555}ol.steps{margin:6px 0 0 18px;padding:0;font-size:.9rem}