.gas-page{--g-accent:#087d70;--g-ink:#132238;--g-muted:#607087;--g-line:#d9e2ec;color:var(--g-ink)}.gas-heading{margin-bottom:2rem}.gas-eyebrow,.gas-step{color:var(--g-accent);font-size:.9rem;font-weight:800}.gas-heading h1{margin:.35rem 0 .8rem;font-size:clamp(2rem,4vw,3.2rem);letter-spacing:0}.gas-heading>p:last-child{max-width:52rem;color:var(--g-muted);font-size:1.08rem;line-height:1.8}.gas-tool{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(280px,.82fr);gap:1rem;align-items:start}.gas-form,.gas-result,.gas-guide{border:1px solid var(--g-line);border-radius:8px;background:#fff}.gas-form{padding:1.4rem}.gas-form h2,.gas-guide h2{margin:.25rem 0 1.15rem;font-size:1.5rem;letter-spacing:0}.gas-section{margin-top:1.2rem;padding-top:1.2rem;border-top:1px solid var(--g-line)}.gas-section h3{margin:0 0 .85rem;font-size:1.05rem;letter-spacing:0}.gas-fields{display:grid;grid-template-columns:1fr 1fr;gap:.9rem}.gas-field{display:flex;flex-direction:column;gap:.4rem;min-width:0;font-weight:800}.gas-field input,.gas-field select{box-sizing:border-box;width:100%;height:3.15rem;padding:0 .8rem;border:1px solid var(--g-line);border-radius:7px;background:#fff;color:var(--g-ink);font:inherit}.gas-field small{color:var(--g-muted);font-weight:400;line-height:1.45}.gas-wide{grid-column:1/-1}.gas-actions{display:flex;gap:.6rem;margin-top:1.2rem}.gas-actions button{min-height:3.15rem;padding:0 1.2rem;border:0;border-radius:7px;background:var(--g-accent);color:#fff;font-weight:800}.gas-actions .secondary{background:#edf2f7;color:#24364c}.gas-status{margin:1rem 0 0;padding:.8rem;border-radius:7px;background:#eaf7f3;color:#08675d;line-height:1.55}.gas-status.is-error{background:#fff0ef;color:#a33a32}.gas-result{padding:1.4rem;background:#f7fafc;position:sticky;top:1rem}.gas-result>span{color:var(--g-muted);font-size:.85rem}.gas-result>strong{display:block;margin:.3rem 0 .5rem;color:var(--g-accent);font-size:2.15rem}.gas-result>p{color:var(--g-muted);line-height:1.55}.gas-summary{display:grid;grid-template-columns:1fr 1fr;gap:.6rem;margin-top:1rem}.gas-summary div{padding:.8rem;border:1px solid var(--g-line);border-radius:7px;background:#fff}.gas-summary span{display:block;color:var(--g-muted);font-size:.78rem}.gas-summary strong{display:block;margin-top:.25rem}.gas-breakdown{margin-top:1rem;border-top:1px solid var(--g-line)}.gas-breakdown div{display:flex;justify-content:space-between;gap:1rem;padding:.65rem 0;border-bottom:1px solid var(--g-line)}.gas-breakdown span{color:var(--g-muted)}.gas-formula{margin-top:1rem;font-size:.86rem;color:var(--g-muted)}.gas-guide{margin-top:1.25rem;padding:1.6rem}.gas-guide>header>p:last-child{color:var(--g-muted);line-height:1.75}.gas-formulas{display:grid;gap:.7rem;margin-top:1rem}.gas-formulas div{padding:1rem;border-radius:7px;background:#f0f8f6}.gas-formulas strong{color:var(--g-accent)}.gas-guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:1.3rem}.gas-guide-grid section{padding-top:1rem;border-top:3px solid #cfe6e1}.gas-guide-grid h3{margin:0 0 .55rem;font-size:1.08rem;letter-spacing:0}.gas-guide-grid p,.gas-guide-grid li{color:var(--g-muted);line-height:1.75}.gas-guide-grid ul{margin:.35rem 0;padding-left:1.2rem}.gas-note,.gas-source{margin-top:1.1rem;padding:1rem;border-radius:7px;line-height:1.65}.gas-note{background:#fff6df;color:#74550f}.gas-source{background:#f7fafc;color:var(--g-muted)}.gas-source a{color:var(--g-accent);font-weight:800}[hidden]{display:none!important}@media(max-width:900px){.gas-tool{grid-template-columns:1fr}.gas-result{position:static}.gas-guide-grid{grid-template-columns:1fr}}@media(max-width:560px){.gas-form,.gas-result,.gas-guide{padding:1rem}.gas-fields{grid-template-columns:1fr}.gas-wide{grid-column:auto}.gas-heading h1{font-size:2rem}.gas-actions{display:grid;grid-template-columns:1fr 1fr}.gas-summary{grid-template-columns:1fr 1fr}}