.calculator-heading{display:grid;gap:.5rem;margin-bottom:1.5rem}.calculator-heading h2{font-size:1.5rem}.calculator-heading>p{margin:0;color:var(--muted);font-size:.9375rem}.field select{width:100%;min-height:2.75rem;padding:.5rem .625rem;border:1px solid #9eb1c2;border-radius:.375rem;background:#fff;color:var(--ink);font:inherit}.btu-results{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;margin-top:1.5rem}.btu-results div{min-width:0;padding:1rem;background:#e7f2fb;border-radius:.5rem}.btu-results span{display:block;color:var(--muted);font-size:.75rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.btu-results output{display:block;overflow:hidden;margin-top:.25rem;font-size:clamp(1.25rem,5vw,1.75rem);font-weight:800;letter-spacing:-.04em;text-overflow:ellipsis;white-space:nowrap}@media(min-width:40rem){.btu-results{grid-template-columns:repeat(4,1fr)}}@media(min-width:64rem){.calculator-heading{grid-template-columns:1fr auto;align-items:end}}