*{box-sizing:border-box}body{margin:0;font:16px/1.6 system-ui;color:#10213b;background:#f6f8fc}header,main,footer{max-width:1120px;margin:auto;padding:1.25rem}header{display:flex;justify-content:space-between;gap:1rem;align-items:center;flex-wrap:wrap}.brand{font-size:1.3rem;font-weight:900}nav{display:flex;gap:1rem;flex-wrap:wrap}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-weight:800;color:#6d4c00}.lede{max-width:70ch;font-size:1.15rem}.primary,.calculator button{display:inline-block;padding:.8rem 1rem;border:0;border-radius:8px;background:#075ff7;color:white;font-weight:800}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr));gap:1rem}.card,.boundary,.result,.guide,.sources{display:block;padding:1.25rem;border:1px solid #d8e0eb;border-radius:14px;background:white;color:inherit}.calculator{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1.5rem}.calculator>h2{grid-column:1/-1}.calculator form{display:grid;gap:.9rem}.calculator label{display:grid;gap:.3rem;font-weight:700}.calculator input{width:100%;padding:.75rem;border:1px solid #75839a;border-radius:8px;font:inherit}.calculator button{cursor:pointer}.result{background:#eef5ff}.result:focus{outline:3px solid #ffbf47}.result dl{margin:0;display:grid;grid-template-columns:1fr auto;gap:.6rem 1rem}.result dt{font-weight:700}.result dd{margin:0;text-align:right}.result[data-state=error]{background:#fff0f0;border-color:#b42318}.boundary,.guide,.sources{margin-top:1.25rem}.boundary p,.guide p,.guide li,.sources p{max-width:75ch}.guide h3{margin-bottom:.25rem}a{color:#075ff7}footer{margin-top:2rem;border-top:1px solid #d8e0eb}@media(max-width:700px){.calculator{grid-template-columns:1fr}.result dl{grid-template-columns:1fr}.result dd{text-align:left}h1{font-size:2rem}}