:root{--bg:#0b0d10;--panel:#12151a;--panel-2:#181c22;--line:#262c35;--line-2:#333a45;--text:#ebe5d6;--muted:#9aa2ad;--dim:#6c7480;--brass:#c9a24b;--brass-2:#e3c47c;--red:#c4422f;--fwd:#ffd34d;--back:#ff7a45;--ok:#6fcf8a;--bad:#ff6b5b;--radius:10px;--sans:"Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;--serif:Georgia, "Times New Roman", serif;--mono:ui-monospace, "SF Mono", Menlo, Consolas, monospace;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);font:14px/1.5 var(--sans);-webkit-font-smoothing:antialiased;margin:0}button,select,input,textarea{font:inherit;color:inherit}body{flex-direction:column;display:flex;overflow:hidden}.topbar{border-bottom:1px solid var(--line);background:linear-gradient(#13161b,#0e1014);flex:none;justify-content:space-between;align-items:center;gap:16px;padding:10px 18px;display:flex}.brand{align-items:center;gap:12px;display:flex}.brand-mark{border:2px solid var(--brass);width:34px;height:34px;color:var(--fwd);background:radial-gradient(circle at 40% 35%,#2a2416,#0e0f12);border-radius:50%;place-items:center;font-weight:800;display:grid;box-shadow:0 0 14px #ffc45a40}.brand-title{font-family:var(--serif);letter-spacing:.22em;font-size:17px}.brand-title b{color:var(--brass-2)}.brand-sub{color:var(--muted);font-size:12px}.tabs{border:1px solid var(--line);background:#0b0d10;border-radius:999px;gap:4px;padding:4px;display:flex}.tabs button{cursor:pointer;color:var(--muted);white-space:nowrap;background:0 0;border:0;border-radius:999px;padding:7px 14px}.tabs button:hover{color:var(--text)}.tabs button.active{background:var(--brass);color:#15120a;font-weight:600}main{flex:1;min-height:0;position:relative}.view{display:none;position:absolute;inset:0}.view.active{display:block}.view.scroll{overflow-y:auto}.machine-layout{grid-template-columns:1fr 380px;height:100%;display:grid}.stage-wrap{min-height:0;position:relative;overflow:hidden}.stage-canvas{touch-action:none;display:block}.overlay{z-index:2;pointer-events:none;position:absolute}.overlay>*{pointer-events:auto}.overlay.top-left{flex-wrap:wrap;gap:8px;display:flex;top:12px;left:12px}.overlay.top-right{max-width:330px;top:12px;right:12px}.overlay.bottom{bottom:12px;left:12px;right:12px}.hint{border:1px solid var(--line);border-radius:var(--radius);color:var(--muted);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#0c0e12b8;padding:9px 12px;font-size:12px;pointer-events:none!important}.hint b{color:var(--text);font-weight:600}.seg{border:1px solid var(--line);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#0c0e12cc;border-radius:999px;padding:3px;display:flex}.seg button,.chip-btn{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:6px 12px;font-size:13px}.seg button.active{color:var(--text);background:#262b33}.chip-btn{border:1px solid var(--line);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#0c0e12cc}.chip-btn.active{border-color:var(--brass);color:var(--brass-2)}.trace{border:1px solid var(--line);border-radius:var(--radius);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);font-family:var(--mono);background:#0a0c0fd1;flex-wrap:wrap;align-items:center;gap:4px;padding:8px 10px;font-size:12px;display:flex}.trace-empty{color:var(--dim);font-family:var(--sans)}.trace-chip{border:1px solid;border-radius:6px;flex-direction:column;align-items:center;padding:2px 7px;line-height:1.25;display:inline-flex}.trace-chip small{color:var(--muted);font-size:9px;font-family:var(--sans);letter-spacing:.04em}.trace-chip.fwd{color:var(--fwd);border-color:#ffd34d73}.trace-chip.back{color:var(--back);border-color:#ff7a4573}.trace-chip.ukw{border-color:var(--brass);color:var(--brass-2)}.chip-key,.chip-lamp{width:30px;height:30px;font-weight:700;font-family:var(--sans);border-radius:50%;place-items:center;display:inline-grid}.chip-key{color:#111;background:#e9e1cc}.chip-lamp{color:#2a1a00;background:#ffcc5a;box-shadow:0 0 14px #ffc45ab3}.trace-note{color:var(--bg);background:var(--brass-2);font-family:var(--sans);border-radius:999px;margin-left:6px;padding:2px 8px;font-weight:700}.sidebar{border-left:1px solid var(--line);background:var(--panel);flex-direction:column;gap:10px;padding:10px;display:flex;overflow-y:auto}.panel{background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius);padding:12px}.panel h3{letter-spacing:.08em;text-transform:uppercase;color:var(--brass-2);justify-content:space-between;align-items:baseline;gap:8px;margin:0 0 10px;font-size:13px;display:flex}.de{font-family:var(--serif);text-transform:none;letter-spacing:0;color:var(--dim);font-size:12px;font-style:italic;font-weight:400}.field{margin-bottom:10px}.field label{color:var(--muted);margin-bottom:4px;font-size:12px;display:block}.field label small{color:var(--dim);font-family:var(--serif);margin-left:4px;font-style:italic}select,input,textarea{border:1px solid var(--line-2);background:#0e1115;border-radius:7px;outline:none;width:100%;padding:6px 8px}select:focus,input:focus,textarea:focus{border-color:var(--brass)}input#cfg-plugs,.pos-input,textarea{font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase}textarea{resize:vertical}.row4{grid-template-columns:repeat(4,1fr);gap:6px;display:grid}.error{color:var(--bad);margin-top:4px;font-size:12px;display:none}.error.show{display:block}.btn-row{flex-wrap:wrap;align-items:center;gap:6px;margin-top:8px;display:flex}.btn-row>select{flex:1;width:auto}button{border:1px solid var(--line-2);cursor:pointer;background:#20252d;border-radius:7px;padding:6px 10px}button:hover{border-color:var(--brass)}button:disabled{opacity:.45;cursor:default}button:disabled:hover{border-color:var(--line-2)}button.primary{background:var(--brass);border-color:var(--brass);color:#15120a;font-weight:600}button.primary:hover{background:var(--brass-2)}.link-btn{color:var(--brass-2);text-align:left;background:0 0;border:0;padding:8px 0 0}.link-btn:hover{text-decoration:underline}.note{color:var(--dim);margin:8px 0 0;font-size:12px}.note:empty{display:none}.windows{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.win{border:1px solid var(--line);background:#0d0f12;border-radius:8px;flex-direction:column;align-items:center;padding:4px;display:flex}.win-letter{font-family:var(--mono);text-align:center;color:#15110a;background:#e7dfc8;border-radius:4px;width:44px;margin:3px 0;font-size:26px;font-weight:700;box-shadow:inset 0 2px 6px #00000073}.win-btn{color:var(--muted);background:0 0;border:0;padding:0 10px;font-size:11px}.win-btn:hover{color:var(--brass-2)}.win-label{color:var(--dim);font-size:11px}.pos-input{text-align:center;width:90px}.tape{color:#1a1610;font-family:var(--mono);background:repeating-linear-gradient(#ede4cc 0 22px,#e4dac0 22px 23px);border-radius:6px;padding:6px 10px;box-shadow:inset 0 1px 4px #0006}.tape-label{font-family:var(--sans);text-transform:uppercase;letter-spacing:.1em;color:#6d6352;font-size:10px}.tape-text{word-spacing:.5em;letter-spacing:.08em;word-break:break-word;max-height:88px;margin-bottom:4px;overflow-y:auto}.tape-text.out{color:#7a1d0f;font-weight:700}.feeding #btn-feed{opacity:.6}.lesson-tabs{border-bottom:1px solid var(--line);background:var(--panel);gap:6px;padding:10px 12px;display:flex;overflow-x:auto}.lesson-tabs button{white-space:nowrap;color:var(--muted);background:0 0;align-items:center;gap:8px;display:flex}.lesson-tabs button span{border:1px solid var(--line-2);border-radius:50%;place-items:center;width:20px;height:20px;font-size:11px;display:grid}.lesson-tabs button.active{border-color:var(--brass);color:var(--text)}.lesson-tabs button.active span{background:var(--brass);color:#15120a;border-color:var(--brass)}#view-lessons.active{flex-direction:column;display:flex}.lesson-body{flex:1;grid-template-columns:1fr 400px;min-height:0;display:grid}.lesson-stage{min-height:0;position:relative;overflow:hidden}.lesson-stage>.lesson-canvas{display:none;position:absolute;inset:0}.lesson-stage>.lesson-canvas.active{display:block}.lesson-panel{border-left:1px solid var(--line);background:var(--panel);overflow-y:auto}.lesson-panel>div{padding:16px;display:none}.lesson-panel>div.active{display:block}.lesson-panel h2{font-family:var(--serif);margin:0 0 6px;font-size:22px;font-weight:400}.lesson-panel p{color:#cfc9bb;margin:0 0 10px}.lesson-panel .controls-box{background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius);margin:12px 0;padding:12px}.lesson-panel .controls-box h4{letter-spacing:.08em;text-transform:uppercase;color:var(--brass-2);margin:0 0 8px;font-size:12px}.ctl{color:var(--muted);grid-template-columns:120px 1fr auto;align-items:center;gap:8px;margin:6px 0;font-size:12px;display:grid}.ctl output{font-family:var(--mono);color:var(--text);text-align:right;min-width:34px}input[type=range]{accent-color:var(--brass);background:0 0;border:0;padding:0}input[type=checkbox]{width:auto;accent-color:var(--brass)}.legend{color:var(--muted);flex-wrap:wrap;gap:14px;margin:6px 0 10px;font-size:12px;display:flex}.legend i{vertical-align:middle;border-radius:2px;width:18px;height:4px;margin-right:6px;display:inline-block}.stage-list{counter-reset:st;margin:8px 0 0;padding:0;font-size:12.5px;list-style:none}.stage-list li{color:var(--dim);border-radius:6px;grid-template-columns:22px 1fr auto;gap:6px;padding:5px 6px;transition:background .2s,color .2s;display:grid}.stage-list li:before{counter-increment:st;content:counter(st);font-family:var(--mono);opacity:.7;padding-top:2px;font-size:10px}.stage-list li b{font-family:var(--mono);font-weight:700}.stage-list li.done{color:#c9c2b2}.stage-list li.current{color:var(--fwd);background:#ffd34d1f}.stage-list li.current.back{color:var(--back);background:#ff7a451f}.bigwin{justify-content:center;gap:10px;margin:8px 0;display:flex}.bigwin div{text-align:center;color:var(--dim);font-size:11px}.bigwin b{font-family:var(--mono);color:#15110a;background:#e7dfc8;border-radius:5px;width:48px;margin-bottom:3px;font-size:30px;transition:background .25s;display:block}.bigwin b.flash{background:var(--fwd)}.bigwin b.flash2{background:var(--back)}.log{font-family:var(--mono);border:1px solid var(--line);background:#0d0f12;border-radius:8px;max-height:200px;padding:8px;font-size:12px;overflow-y:auto}.log div{color:#bdb6a6;border-bottom:1px dashed #1f242b;padding:2px 0}.log div.ds{color:var(--fwd)}.callout{border-left:3px solid var(--brass);color:#d9d2c2;background:#c9a24b14;border-radius:0 8px 8px 0;margin:10px 0;padding:8px 12px;font-size:13px}.kbd-row{flex-wrap:wrap;justify-content:center;gap:3px;margin:3px 0;display:flex}.kbd-row button{color:#111;background:#e9e1cc;border:2px solid #3b3f46;border-radius:50%;width:30px;height:30px;padding:0;font-size:12px;font-weight:700}.kbd-row button:hover{border-color:var(--brass)}.kbd-row button.on{background:var(--fwd)}.walk-progress{gap:4px;margin:12px 0;display:flex}.walk-progress span{background:var(--line-2);border-radius:3px;flex:1;height:6px}.walk-progress span.done{background:var(--brass)}.walk-progress span.rx.done{background:var(--back)}.walk-progress span.current{background:var(--fwd);box-shadow:0 0 8px #ffd34d99}.walk-card{background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius);padding:14px}.walk-card p{margin:0 0 10px}.walk-role{letter-spacing:.1em;text-transform:uppercase;color:var(--brass-2);font-size:11px}.walk-role.rx{color:var(--back)}.walk-role.wrap{color:var(--muted)}.walk-card h3{font-family:var(--serif);margin:4px 0 8px;font-size:19px;font-weight:400}.walk-card .keysheet table{margin-bottom:8px;font-size:12px}.walk-card .keysheet th{text-transform:none;letter-spacing:0;width:40%;font-family:var(--serif);font-size:12.5px;font-style:italic}.walk-card .keysheet td{font-family:var(--mono)}.walk-card button:disabled{opacity:.45;cursor:default;border-color:var(--line-2)}.walk-card button.primary:disabled{background:#5d4f2c;border-color:#5d4f2c}.walk-hint{min-height:18px;color:var(--fwd);margin-top:8px;font-size:12.5px}.walk-hint:empty{display:none}.warn{color:#ffb84a;font-size:12.5px}.warn:empty{display:none}.letters3{text-align:center;width:84px;font-family:var(--mono);text-transform:uppercase;letter-spacing:.3em;font-size:16px;flex:none!important;min-width:0!important}.radio{font-family:var(--mono);border:1px solid var(--line);color:var(--brass-2);word-spacing:.4em;letter-spacing:.06em;word-break:break-word;background:#0d0f12;border-radius:8px;margin-bottom:10px;padding:10px}.walk-list li{color:#cfc9bb;margin-bottom:8px;font-size:13.5px}.pad{color:#1a1610;font-family:var(--mono);background:#ede4cc;border-radius:8px;margin-top:12px;padding:12px 14px;box-shadow:inset 0 1px 4px #00000059}.pad h4{font-family:var(--sans);letter-spacing:.12em;text-transform:uppercase;color:#6d6352;margin:0 0 6px;font-size:10px}.pad-row{border-bottom:1px solid #d4c9ab;grid-template-columns:120px 1fr;align-items:baseline;gap:10px;padding:6px 0;font-size:13.5px;display:grid}.pad-row:last-child{border-bottom:0}.pad-row small{font-family:var(--sans);color:#6d6352;font-size:11px;line-height:1.3}.pad-row b{letter-spacing:.1em;word-spacing:.3em;word-break:break-word}.pad-row.rx b{color:#7a1d0f}.doc{max-width:920px;margin:0 auto;padding:32px 24px 80px}.doc h1{font-family:var(--serif);margin:0 0 10px;font-size:36px;font-weight:400}.doc h2{font-family:var(--serif);border-top:1px solid var(--line);margin:36px 0 10px;padding-top:8px;font-size:24px;font-weight:400}.doc p,.doc li,.doc dd{color:#d3cdbf;font-size:15px;line-height:1.65}.lede{color:#c9c3b4!important;font-size:16.5px!important}.doc code{font-family:var(--mono);color:var(--brass-2);background:#1a1e24;border-radius:4px;padding:1px 5px;font-size:.92em}.toc{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:4px 16px;margin:20px 0;padding:14px 18px;display:grid}.toc a{color:var(--brass-2);text-decoration:none}.toc a:hover{text-decoration:underline}.parts dt{margin-top:12px;font-weight:700}.parts dd{margin:2px 0 0}.steps li{margin-bottom:6px}.aside{border-left:3px solid var(--line-2);padding-left:12px;color:var(--muted)!important;font-size:14px!important}.keysheet{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px}th,td{border:1px solid var(--line);text-align:left;padding:7px 10px}th{background:var(--panel-2);color:var(--brass-2);text-transform:uppercase;letter-spacing:.05em;font-size:12px;font-weight:600}.keysheet td{font-family:var(--mono)}.controls td:first-child{white-space:nowrap;color:var(--text);width:150px;font-weight:600}.controls td{color:#cfc9bb}.flaw{background:var(--panel);border:1px solid var(--line);border-radius:14px;margin:22px 0;padding:20px 22px}.flaw-head{align-items:flex-start;gap:14px;display:flex}.flaw-num{background:var(--red);color:#fff;width:36px;height:36px;font-weight:800;font-family:var(--serif);border-radius:50%;flex:none;place-items:center;display:grid}.flaw h2{border:0;margin:2px 0 6px;padding:0;font-size:22px}.flaw .exploit{border-left:3px solid var(--red);color:#e2cfc8;background:#c4422f14;border-radius:0 8px 8px 0;margin:12px 0;padding:8px 12px;font-size:14px}.demo{border:1px solid var(--line);background:#0d0f12;border-radius:10px;margin-top:12px;padding:14px}.demo-row{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:10px;display:flex}.demo-row input{flex:1;min-width:200px}.demo-row label{color:var(--muted);font-size:13px}.mono{font-family:var(--mono)}.crib-grid{font-family:var(--mono);white-space:pre;font-size:13px;line-height:1.75;overflow-x:auto}.crib-grid .ct{color:var(--brass-2)}.crib-row{cursor:default}.crib-row.bad{color:#6d5e5a}.crib-row.ok{color:var(--ok)}.crib-row .hit{background:var(--red);color:#fff;border-radius:2px}.crib-row .tag{font-family:var(--sans);margin-left:10px;font-size:11px}.stat{margin-right:18px;display:inline-block}.stat b{font-family:var(--mono);color:var(--brass-2);font-size:22px;display:block}.stat span{color:var(--muted);font-size:12px}.odo{font-family:var(--mono);flex-wrap:wrap;gap:6px;display:flex}.odo span{border:1px solid var(--line);background:#171b21;border-radius:5px;padding:3px 7px}.odo span.ds{border-color:var(--fwd);color:var(--fwd)}.compare{font-family:var(--mono);grid-template-columns:170px 1fr;align-items:center;gap:6px 12px;font-size:13px;display:grid}.compare .lbl{font-family:var(--sans);color:var(--muted);font-size:12px}.match{color:var(--ok)}.mismatch{color:var(--bad)}.bars{gap:4px;font-size:12px;display:grid}.bars .bar{grid-template-columns:70px 1fr 150px;align-items:center;gap:8px;display:grid}.bars .bar i{background:var(--line-2);border-radius:3px;height:10px;display:block}.bars .bar.max i{background:var(--brass)}.bars .bar.used i{background:var(--red)}.bars.hist{gap:2px;margin-top:10px}.bars.hist .bar{grid-template-columns:16px 1fr 80px}.bars .bar span{font-family:var(--mono);color:var(--muted);text-align:right}@media (width<=980px){body{overflow:auto}.topbar{flex-direction:column;align-items:stretch}.tabs{overflow-x:auto}main{min-height:calc(100vh - 110px)}.view{position:relative;inset:auto}.machine-layout,.lesson-body{grid-template-columns:1fr;height:auto}.stage-wrap,.lesson-stage{height:62vh}.sidebar,.lesson-panel{border-left:0;border-top:1px solid var(--line)}.overlay.top-right{display:none}.doc{padding:20px 16px 60px}}