@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');
:root{--bg:#f5f5ef;--paper:#fffefa;--ink:#213c36;--muted:#6b7b70;--line:#dbe0d4;--teal:#19736a;--teal-bg:#e0f1e9;--orange:#bd622a;--orange-bg:#fff0df;--mono:'IBM Plex Mono',ui-monospace,monospace;--sans:'DM Sans',system-ui,sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.55 var(--sans)}button,input,select{font:inherit}button,a,input,summary,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:var(--ink);border:1px solid var(--line);border-radius:7px;background:var(--paper);padding:7px 12px;transition:background .15s,border-color .15s}button:hover{border-color:var(--teal);background:var(--teal-bg)}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #e5ac56;outline-offset:3px}a{color:var(--teal)}header{height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 4%;gap:20px}.brand{font-size:22px;font-weight:700;display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none}.brand-icon{display:inline-grid;place-items:center;background:var(--teal);color:white;width:34px;height:34px;border-radius:8px;font-size:26px}.brand-sub,.edition,.eyebrow,.tiny{font:10px var(--mono);letter-spacing:1.3px}.brand-sub{border-left:1px solid var(--line);padding-left:18px;margin-left:8px;color:var(--muted)}.edition{color:var(--muted)}main{max-width:1540px;margin:auto;padding:0 4%}.hero{display:flex;justify-content:space-between;align-items:center;padding:47px 0 33px;gap:25px}.eyebrow{display:block;color:var(--teal);font-weight:500}h1{font-size:clamp(32px,3.7vw,52px);line-height:1.1;letter-spacing:-2px;margin:17px 0}h1 span{color:var(--teal);font-weight:450}.hero p{color:var(--muted);margin:16px 0 0;font-size:14px}.hero-note{border-left:2px solid #c9d8c8;padding:15px 0 15px 26px;flex-shrink:0}.hero-note p{font-size:19px;line-height:1.55;color:var(--ink);margin:14px 0 7px}.hero-note>span:last-child{font-size:12px;color:var(--muted)}.generate-text{color:var(--orange)}.propagate-text{color:var(--teal)}.card{border:1px solid var(--line);border-radius:12px;background:var(--paper)}.workbench{padding:22px 25px 16px}.section-top{display:flex;justify-content:space-between;align-items:center;gap:15px}h2{font-size:19px;line-height:1.35;margin:8px 0;font-weight:600;letter-spacing:-.45px}.width-label{display:flex;align-items:center;gap:9px;font-size:12px}.width-label span{color:var(--muted);font-size:10px}.width-label input{width:66px}.input-layout{display:flex;align-items:center;gap:24px;margin:20px 0}.bit-inputs{overflow:auto;flex:1;min-width:0;padding-bottom:6px}.bit-row{display:flex;align-items:center;gap:6px;min-width:max-content;margin:5px 0}.row-label{width:30px;flex-shrink:0;font-weight:600;color:var(--muted);font-family:var(--mono)}.bit-button{width:37px;height:37px;flex-shrink:0;padding:0;font:500 16px var(--mono);background:#f2f4ed}.bit-button.one{background:var(--teal-bg);border-color:#90b6a8;color:var(--teal)}.bit-index{width:37px;text-align:center;font:10px var(--mono);color:var(--muted);flex-shrink:0}.bit-inputs .bit-row:first-child{margin-top:0}.number-inputs{display:flex;flex-wrap:wrap;gap:10px;max-width:310px;border-left:1px solid var(--line);padding-left:22px}.number-inputs label{display:flex;gap:8px;align-items:center;font-family:var(--mono)}input[type=number],select{border:1px solid var(--line);border-radius:6px;background:white;padding:7px;color:var(--ink)}.number-inputs input{width:110px;font:12px var(--mono)}.cin-field{display:flex;gap:16px;align-items:center;width:100%;margin-top:4px}.cin-field small{color:var(--muted);font-family:var(--mono);margin-left:5px}.presets{display:flex;align-items:center;flex-wrap:wrap;gap:7px;border-top:1px solid var(--line);padding-top:14px}.presets>span{font:9px var(--mono);letter-spacing:1px;margin-right:7px;color:var(--muted)}.presets button{font-size:11px;padding:6px 10px;border-radius:20px}.presets p{width:100%;margin:3px 0 0;font-size:12px;color:var(--muted)}.architecture-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:28px 0 0;border-bottom:1px solid var(--line)}.architecture-tabs button{border:0;border-bottom:3px solid transparent;border-radius:9px 9px 0 0;text-align:left;background:transparent;padding:15px 17px;font-size:16px;font-weight:600}.architecture-tabs button span{font:11px var(--mono);color:var(--muted);margin-right:10px}.architecture-tabs small{display:block;color:var(--muted);font-size:11px;font-weight:400;padding-left:30px;margin-top:3px}.architecture-tabs button.active{background:#e9eee3;border-bottom-color:var(--teal)}.architecture-intro{display:flex;justify-content:space-between;align-items:center;gap:24px;margin:22px 0 17px}.architecture-intro h2{font-size:22px}.architecture-intro p{margin:6px 0 0;max-width:860px;color:var(--muted);font-size:13px}.depth-pill{padding:10px 15px;border:1px solid var(--line);border-radius:8px;white-space:nowrap;font:11px var(--mono);text-align:center}.depth-pill b{display:block;color:var(--teal);font-size:24px}.lab-layout{display:grid;grid-template-columns:minmax(0,1fr) 345px;gap:17px;align-items:start}.circuit-panel{overflow:hidden}.circuit-toolbar{padding:20px 20px 10px;display:flex;justify-content:space-between;align-items:center;gap:10px}.diagram-hint{display:block;font-size:11px;color:var(--muted);margin-top:7px}.fit-label{display:flex;align-items:center;gap:5px;font-size:10px;color:var(--muted)}input[type=checkbox],input[type=range]{accent-color:var(--teal)}.legend{display:flex;flex-wrap:wrap;gap:9px 14px;padding:8px 20px 15px;font:9px var(--mono);color:var(--muted)}.legend span{display:flex;align-items:center;gap:5px}.swatch{width:9px;height:9px;display:inline-block;border-radius:3px}.swatch.generate{background:var(--orange)}.swatch.propagate{background:var(--teal)}.swatch.kill{background:#738274}.swatch.pending{border:1px dashed #a5b0a2;background:white}.graph-scroll{overflow:auto;background-color:#fafbf6;background-image:radial-gradient(#e0e5d9 .7px,transparent .7px);background-size:14px 14px;border-block:1px solid var(--line)}#graph{min-width:100%;width:max-content}#graph svg{display:block}#graph.fit,#graph.compact{width:100%}#graph.fit svg,#graph.compact svg{width:100%;height:auto}.svg-label{font:10px var(--mono);fill:var(--muted)}.svg-small{font:9px var(--mono);fill:var(--muted)}.svg-main{font:500 11px var(--mono);fill:var(--ink)}.wire{fill:none;stroke:#c5cfc2;stroke-width:1.4}.wire.highlight{stroke:var(--teal);stroke-width:2.3}.wire.future{stroke-dasharray:4 4;opacity:.6}.node{cursor:pointer;outline:none}.node rect{stroke:#bcc8b8;stroke-width:1;fill:#edf0e8}.node.generate rect{fill:var(--orange-bg);stroke:#cc9c71}.node.propagate rect{fill:var(--teal-bg);stroke:#89b4a3}.node.pending rect{fill:#f9faf5;stroke:#bfc9ba;stroke-dasharray:4 3}.node.selected rect{stroke:var(--ink);stroke-width:2.6}.node.ancestor rect{stroke-width:2;stroke:var(--teal)}.node:focus rect{stroke:#d8902f;stroke-width:3}.node:hover rect{filter:brightness(.96)}.node.dim{opacity:.65}.wire.dim{opacity:.25}.node.pending text{fill:#93a08f}.playback{padding:16px 20px}.playback-buttons{display:flex;gap:6px}.playback button{font-size:11px;padding:7px 11px}.playback button.primary{background:var(--teal);border-color:var(--teal);color:white;min-width:78px}.speed-label{display:flex;align-items:center;gap:7px;float:right;font-size:10px;margin-top:-32px}.speed-label select{padding:4px;font-size:10px}#stage{width:100%;margin:17px 0 8px}.stage-copy{min-height:52px}.stage-copy b{display:block;font-size:13px}.stage-copy span{font-size:12px;color:var(--muted)}.timing-note{border-top:1px solid var(--line);margin:0;padding:13px 20px;font-size:10px;color:var(--muted)}.inspector{padding:20px;overflow:hidden}.inspector .tag{font:10px var(--mono);border:1px solid var(--line);border-radius:20px;padding:4px 9px;display:inline-block;margin-top:10px}.inspector h2{font-size:22px;margin:10px 0}.inspector p{font-size:12px;color:var(--muted);margin:8px 0 13px}.inspector h3{font-size:10px;text-transform:uppercase;letter-spacing:1px;margin:20px 0 9px;color:var(--muted)}.equation{font:12px/1.9 var(--mono);background:#f0f3eb;padding:11px 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8px}.result-panel{margin:19px 0 24px;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.result-panel h2{font:500 22px var(--mono);margin:7px 0}.result-panel p{font-size:10px;color:var(--muted);margin:5px 0}.binary-line{font:500 18px var(--mono);letter-spacing:2px;overflow-wrap:anywhere;text-align:right}.binary-line .overflow-bit{color:var(--orange);border-right:1px solid var(--line);padding-right:8px;margin-right:8px}.binary-key{display:flex;justify-content:flex-end;gap:20px;font:9px var(--mono);color:var(--muted);margin-top:6px}.learning-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.learning{padding:25px}.learning h2{font-size:22px}.learning p{font-size:13px;color:var(--muted)}.learning ol{list-style:none;counter-reset:lesson;padding:0;margin:24px 0 0}.learning li{counter-increment:lesson;position:relative;padding-left:38px;margin:19px 0}.learning li:before{content:counter(lesson);position:absolute;left:0;top:2px;width:24px;height:24px;border:1px solid var(--line);border-radius:50%;text-align:center;font:11px/24px var(--mono);color:var(--teal)}.learning li button{border:0;padding:0;background:none;color:var(--teal);text-align:left;font-weight:600;font-size:14px;text-decoration:underline;text-decoration-color:#b4cfc1;text-underline-offset:4px}.learning li p{margin:5px 0;font-size:12px}.learning details{font-size:12px;border-top:1px solid var(--line);padding-top:12px;margin-top:14px}summary{cursor:pointer;font-weight:500}.comparison{padding:24px;margin-top:18px}.comparison h2{font-size:22px}.compare-row{display:grid;grid-template-columns:145px 1fr 160px;gap:18px;align-items:center;margin:15px 0;font-size:12px}.compare-track{height:8px;border-radius:8px;background:#eff1e9;overflow:hidden}.compare-bar{height:100%;background:var(--teal);border-radius:8px}.compare-row:first-child .compare-bar{background:#a2bba1}.compare-row:nth-child(2) .compare-bar{background:#cc9a69}.compare-row strong{font:11px var(--mono);font-weight:400}.comparison>p{font-size:11px;color:var(--muted);max-width:1000px}footer{display:flex;justify-content:space-between;gap:18px;padding:26px 0 35px;font-size:10px;color:var(--muted)}footer a{color:var(--muted)}
@media(min-width:1450px){.lab-layout{grid-template-columns:minmax(0,1fr) 380px}.bit-button{width:42px;height:40px}.bit-index{width:42px}}
@media(max-width:1050px){.brand-sub{display:none}.lab-layout{grid-template-columns:minmax(0,1fr) 310px}.hero-note{display:none}.number-inputs{max-width:165px}.speed-label{float:none;margin:10px 0 0}.input-layout{gap:14px}.bit-button{width:31px;height:33px}.bit-index{width:31px}.graph-scroll{max-height:720px}}
@media(max-width:780px){header{height:64px}.edition{font-size:8px;letter-spacing:.4px}.hero{padding-top:30px}.hero p br{display:none}.hero p{font-size:13px}.lab-layout{grid-template-columns:1fr}.inspector{min-height:0}.architecture-tabs button{font-size:12px;padding:12px 8px}.architecture-tabs button span{display:none}.architecture-tabs small{font-size:9px;padding:0}.architecture-intro{gap:12px}.architecture-intro h2{font-size:19px}.depth-pill{padding:8px;font-size:9px}.architecture-intro p{font-size:12px}.learning-grid{grid-template-columns:1fr}.result-panel{align-items:flex-start;flex-direction:column;gap:10px}.binary-line{text-align:left;font-size:15px}.binary-key{justify-content:flex-start}.workbench{padding:18px 14px}.section-top h2{font-size:15px}.input-layout{flex-direction:column;align-items:stretch}.number-inputs{border:0;padding:0;max-width:none;gap:15px}.number-inputs input{width:95px}.cin-field{width:auto;margin:0;font-size:11px;gap:8px}.bit-inputs{width:100%}.number-inputs .bit-button{width:31px}.compare-row{grid-template-columns:105px 1fr 110px;gap:9px;font-size:10px}.compare-row strong{font-size:9px}.comparison,.learning{padding:20px}.hero h1{letter-spacing:-1.2px}.width-label{font-size:10px}.width-label span{display:none}.width-label input{width:53px}.eyebrow{font-size:9px;letter-spacing:.8px}.fit-label{font-size:9px}footer{flex-direction:column;gap:7px}.playback-buttons{flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Floating inputs share the circuit's column coordinates and scroll offset. */
html{scroll-padding-top:170px}
.floating-inputs[hidden]{display:none}
.floating-inputs{position:fixed;z-index:20;top:10px;display:grid;grid-template-columns:var(--circuit-width) minmax(0,1fr);align-items:center;gap:17px;box-shadow:0 6px 26px #213c3626;border-color:#b7cbbd;background:var(--paper);overflow:hidden}
.floating-bit-viewport{min-width:0;overflow-x:auto;overflow-y:hidden;scrollbar-width:thin}
.floating-bit-canvas{position:relative;height:104px}
.floating-column{position:absolute;top:7px;transform:translateX(-50%);width:var(--input-width);display:flex;flex-direction:column;align-items:center;gap:5px}
.floating-column::after{content:'';position:absolute;top:18px;bottom:-8px;left:50%;border-left:1px dashed #b7cbbd;z-index:-1}
.floating-index{font:var(--input-font)/16px var(--mono);color:var(--muted);text-align:center}
.floating-column .bit-button{width:100%;height:29px;font-size:var(--input-font);border-radius:5px}
.floating-row-label{position:absolute;font:500 12px/29px var(--mono);color:var(--muted)}
.floating-row-label.label-a{top:28px}.floating-row-label.label-b{top:62px}
.floating-summary{padding:10px 14px 10px 0;min-width:0}
.floating-values{display:flex;flex-wrap:wrap;gap:4px 14px;margin:6px 0;font:11px var(--mono)}
.floating-values span{white-space:nowrap}
.floating-inputs .cin-field{margin:0;gap:10px;font-size:11px}
.floating-inputs .cin-field .bit-button{width:27px;height:27px;font-size:12px;border-radius:5px}
@media(max-width:780px){
  .floating-inputs{top:6px;gap:0;grid-template-columns:minmax(0,1fr)}
  .floating-summary{grid-row:1;display:flex;justify-content:space-between;align-items:center;gap:8px;padding:6px 10px;border-bottom:1px solid var(--line)}
  .floating-summary .eyebrow{display:none}
  .floating-values{gap:3px 10px;font-size:10px;margin:0}
  .floating-inputs .cin-field{width:auto;font-size:10px;flex-shrink:0;gap:6px}
  .floating-inputs .cin-field small{display:none}
}