:root{color-scheme:dark;--bg:#101312;--panel:#191d1b;--line:#343d36;--muted:#aab5ad;--text:#f1f5ed;--lime:#c7f464;--danger:#ff9b84;font-family:Arial,Helvetica,sans-serif;font-size:16px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}main{max-width:1180px;margin:auto;padding:32px 40px}header{display:flex;align-items:center;justify-content:space-between;padding-bottom:26px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);font-size:14px;font-weight:700;letter-spacing:2px}.brand-mark{display:grid;place-items:center;background:var(--lime);color:var(--bg);width:36px;height:36px;letter-spacing:-2px;font-size:20px}.eyebrow,.note-number{font-family:monospace;font-size:12px;letter-spacing:1.5px;color:var(--muted)}.accent{color:var(--lime)}.intro{padding:40px 0 30px;display:grid;grid-template-columns:1.2fr 1fr;column-gap:50px}.intro .eyebrow{grid-column:1/-1;margin:0 0 18px}h1{font-size:clamp(40px,5.5vw,68px);line-height:1.02;letter-spacing:-3px;margin:0}h1 span{color:var(--lime)}.intro>p:last-child{align-self:end;max-width:350px;color:var(--muted);line-height:1.7;margin:0 0 4px}code{font-family:monospace}.lab{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel)}.lab-heading{display:flex;justify-content:space-between;align-items:center;padding:22px 28px;border-bottom:1px solid var(--line)}h2{font-size:20px;margin:0}.badge{border:1px solid #526141;border-radius:20px;padding:7px 11px;color:var(--lime);font:12px monospace}.controls{display:flex;align-items:end;gap:16px;padding:24px 28px 0}label{display:flex;flex-direction:column;gap:9px;font-size:14px;color:var(--muted)}input,select,button{font:inherit}input,select{color:var(--text);background:#101512;border:1px solid #4b574e;border-radius:6px;min-height:46px;padding:10px 12px;width:100%}.controls label:first-child{flex:1}.controls label:nth-child(2){flex:1}.controls label:nth-child(3){width:95px}button{cursor:pointer;border:1px solid #4b574e;border-radius:6px;background:transparent;color:var(--text);padding:11px 16px;min-height:44px;font-size:14px;transition:background .15s}button:hover{background:#303b30}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--lime);border-color:var(--lime);color:#15200a;font-weight:700;min-height:46px}.primary span{padding-left:20px}button.primary:hover{background:#dafb9b}:focus-visible{outline:3px solid var(--lime);outline-offset:4px}.error{margin:8px 28px 0;color:var(--danger);font-size:14px}.error:empty{display:none}.presets{display:flex;gap:8px;align-items:center;padding:16px 28px 22px;font-size:14px;color:var(--muted);flex-wrap:wrap}.presets button{font-size:12px;min-height:32px;padding:5px 10px;border-color:var(--line);border-radius:20px}.stage{background:#111713;padding:24px 38px 20px;border-block:1px solid var(--line);overflow:hidden}.stage-heading{display:flex;justify-content:space-between;gap:10px;font:12px monospace;color:var(--muted);margin-bottom:24px}.register{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:10px}.bit-slot{text-align:center;min-width:0}.weight{display:block;font:14px monospace;color:#8b998e;margin-bottom:12px}.bit{position:relative;width:100%;height:70px;padding:0;background:#182019;border-color:#39483b;font:32px monospace;border-radius:7px}.bit.on{color:var(--lime);background:#25321e;border-color:#748b4b}.bit-slot:has(.on) .weight{color:var(--lime)}.glyph{display:block}.sum{text-align:center;font:clamp(14px,2.4vw,21px) monospace;margin:24px 0;color:var(--lime);min-height:25px}.transport{display:flex;align-items:center;gap:10px}.transport button{padding:8px 12px;min-height:36px}.transport span{margin-left:auto;font:12px monospace;color:var(--muted)}.result{display:grid;grid-template-columns:170px 1fr;gap:32px;padding:24px 28px}.result .eyebrow{margin-top:0}output{font:64px monospace;letter-spacing:-4px}.explanation{border-left:1px solid var(--line);padding-left:28px}h3{font-size:20px;margin:0 0 8px}.explanation p{margin:0 0 12px;color:var(--muted);font-size:15px;line-height:1.55}.explanation code{font-size:14px;color:var(--lime)}.result.overflow h3,.result.overflow code{color:var(--danger)}.notes{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:38px 0}.notes h2{margin:14px 0 12px}.notes p{color:var(--muted);line-height:1.65;font-size:14px}.note-number{color:var(--lime)}.notes article+article{border-left:1px solid var(--line);padding-left:28px}.answer-row{display:flex;gap:8px;margin-top:12px}.answer-row input{min-width:0}.answer-row button{flex-shrink:0}footer{border-top:1px solid var(--line);padding:22px 0;color:var(--muted);font:11px monospace;display:flex;justify-content:space-between;gap:20px;line-height:1.7}
@media(max-width:700px){main{padding:20px 18px}header>.eyebrow{display:none}.intro{display:block;padding:30px 0}.intro>p:last-child{margin-top:20px;max-width:none}h1{letter-spacing:-2px}.controls{display:grid;grid-template-columns:1fr 1fr;padding:20px 18px 0}.controls label:nth-child(3){width:auto}.lab-heading{padding:18px;gap:10px}.badge{font-size:10px}.presets{padding-inline:18px}.stage{padding:20px 12px}.register{gap:5px}.bit{height:52px;font-size:24px}.weight{font-size:12px}.stage-heading{font-size:10px}.transport{flex-wrap:wrap}.transport span{width:100%;margin:6px 0 0}.result{grid-template-columns:90px 1fr;gap:12px;padding:22px 18px}output{font-size:48px}.explanation{padding-left:16px}.notes{grid-template-columns:1fr;gap:20px}.notes article+article{padding:20px 0 0;border-left:0;border-top:1px solid var(--line)}footer{flex-direction:column;gap:4px}.result .eyebrow{font-size:10px}h3{font-size:18px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
.incoming-zero{position:absolute;inset:0;display:grid;place-items:center;color:var(--text);pointer-events:none}