:root{color:#292329;font-synthesis:none;--red:#c8102e;--muted:#655a60;--line:#e8dfe1;background:#faf8f8;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}body{border-top:4px solid var(--red);margin:0}[hidden]{display:none!important}a{color:inherit}button,input,select{font:inherit}button,summary{cursor:pointer}:focus-visible{outline:3px solid var(--red);outline-offset:3px}.wrap{width:min(1000px,100% - 32px);margin:auto}.site-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;padding:20px 0;display:flex}.brand{letter-spacing:-.7px;color:var(--red);font-size:22px;font-weight:800;text-decoration:none}.brand span{color:#292329}.tiny{letter-spacing:1px;color:var(--muted);font-size:9px}.intro{padding:24px 0 18px}h1{letter-spacing:-.8px;margin:0 0 10px;font-size:clamp(25px,4vw,36px);line-height:1.15}h2{margin:0 0 16px;font-size:18px}h3{margin:20px 0 8px;font-size:16px}p{margin:8px 0 12px;line-height:1.6}.intro p{color:var(--muted);margin:0;font-size:14px}.workspace{gap:16px;display:grid}.panel{border:1px solid var(--line);background:#fff;border-radius:14px;padding:20px}.mode-field{border:0;margin:0;padding:0}.mode-grid{background:#f6f0f1;border-radius:9px;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;padding:4px;display:grid}.mode-option{text-align:center;position:relative}.mode-option input{opacity:0;width:1px;height:1px;position:absolute}.mode-option span{cursor:pointer;border-radius:6px;justify-content:center;align-items:center;min-height:42px;font-size:12px;font-weight:700;display:flex}.mode-option input:checked+span{background:var(--red);color:#fff}.mode-option input:focus-visible+span{outline:3px solid var(--red);outline-offset:2px}.field-help{color:var(--muted);font-size:12px;line-height:1.6}.fields{gap:14px;margin-top:16px;display:grid}label{margin-bottom:6px;font-size:13px;font-weight:700;display:block}.mode-option{margin:0}.input-unit{background:#fff;border:1px solid #bcb0b5;border-radius:8px;align-items:center;display:flex}.input-unit input{background:0 0;border:0;border-radius:8px;width:100%;min-width:0;padding:12px;font-weight:600}.input-unit span{color:var(--muted);padding-right:12px;font-size:12px}select{width:100%;min-height:44px;color:inherit;background:#fff;border:1px solid #bcb0b5;border-radius:8px;padding:8px}.calculate-button{background:var(--red);color:#fff;border:0;border-radius:8px;width:100%;min-height:46px;margin:18px 0 10px;font-weight:700}.calculate-button:hover{background:#a70b25}.ratio-field{margin-top:16px}.ratio-field label{justify-content:space-between;display:flex}input[type=range]{width:100%;min-height:36px;accent-color:var(--red)}details{border-top:1px solid var(--line);padding:14px 0;font-size:13px;line-height:1.6}summary{min-height:28px;padding:3px 0;font-weight:700}details[open]>summary{margin-bottom:12px}.advanced{padding-bottom:0}.result-card{border-top:3px solid var(--red)}.fuel-results{grid-template-columns:1fr 1fr;gap:10px;display:grid}.fuel-results article{background:#fff3f5;border-radius:10px;padding:12px}.fuel-results p{margin:0 0 8px;font-size:12px}.fuel-results strong{letter-spacing:-.5px;color:#a70b25;overflow-wrap:anywhere;font-size:clamp(20px,5.7vw,27px);display:block}.fuel-results small{color:var(--muted);margin-top:6px;font-size:12px;display:block}.totals{margin:18px 0 8px}.totals>div{border-bottom:1px solid var(--line);justify-content:space-between;align-items:baseline;gap:12px;padding:10px 0;display:flex}dt{font-size:13px}dd{text-align:right;margin:0;font-weight:700}.totals>div:first-child dd{color:var(--red);font-size:29px}.error{color:#9c0822;background:#fff3f5;border:1px solid #c8102e;border-radius:8px;padding:14px;font-size:14px}.blend-bar{background:#f5ccd4;border-radius:5px;height:8px;margin:14px 0;display:flex;overflow:hidden}#bar-low{background:#c8102e}#bar-high{background:#eea8b4}.information{margin:28px 0}.information h2{margin-bottom:12px}.information details{padding:14px 4px}.information code{white-space:normal;overflow-wrap:anywhere;background:#f2edef;border-radius:6px;padding:12px;font-size:12px;display:block}.price-list>div{border-bottom:1px solid var(--line);justify-content:space-between;gap:12px;padding:9px 0;display:flex}.price-list small{color:var(--muted);font-size:11px}footer{border-top:1px solid var(--line);color:var(--muted);padding:20px 0 28px;font-size:12px}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (width>=720px){.workspace{grid-template-columns:1fr 1fr;align-items:start}.fields{grid-template-columns:1fr 1fr}.panel{padding:24px}.intro{padding:32px 0 24px}.fuel-results strong{font-size:26px}}@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth;scroll-padding-top:16px}}