:root{--bg:#e6ebee;--surface:#f3f6f8;--ink:#15212c;--muted:#55626e;--line:#c6d0d7;--lox:#2764aa;--ch4:#8a5a08;--cu:#a65a30;--focus:#2a68b0;--warn:#b3261e;--go:#1f7a4d;--fluid:#1f7f86;--on-go:#fff;--on-ch4:#fff;--on-warn:#fff;--glass:#f3f6f8db;--tint-intake:color-mix(in srgb,var(--lox) 22%,transparent);--tint-compression:color-mix(in srgb,var(--lox) 40%,transparent);--tint-power:color-mix(in srgb,var(--ch4) 45%,transparent);--tint-exhaust:color-mix(in srgb,var(--cu) 22%,transparent);--tint-hot:color-mix(in srgb,var(--cu) 18%,var(--surface));--stage:#7d8083;--on-stage:#fff;--stage-deep:#4a4d50;--on-stage-deep:#fff;--label:#15212cc7;--on-label:#fff;--path:#e8772a;--apply:#ffd66b;--path-tint:color-mix(in srgb,var(--path) 16%,transparent);--sans:"Archivo", "Helvetica Neue", Arial, sans-serif;--serif:"Source Serif 4", Georgia, "Times New Roman", serif;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0e1822;--surface:#132230;--ink:#dce4ea;--muted:#8d9aa6;--line:#253545;--lox:#72aaee;--ch4:#e4a846;--cu:#db8c5e;--focus:#72aaee;--warn:#f2867e;--go:#5bc48e;--fluid:#5cc3c9;--on-go:#0e1822;--on-ch4:#0e1822;--on-warn:#0e1822;--glass:#132230d6;--tint-intake:color-mix(in srgb,var(--lox) 18%,transparent);--tint-compression:color-mix(in srgb,var(--lox) 30%,transparent);--tint-power:color-mix(in srgb,var(--ch4) 30%,transparent);--tint-exhaust:color-mix(in srgb,var(--cu) 18%,transparent);--tint-hot:color-mix(in srgb,var(--cu) 12%,var(--surface));--stage:#7d8083;--on-stage:#fff;--stage-deep:#4a4d50;--on-stage-deep:#fff;--label:#15212cc7;--on-label:#fff;--path:#e8772a;--apply:#ffd66b;--path-tint:color-mix(in srgb,var(--path) 16%,transparent);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--bg:#0e1822;--surface:#132230;--ink:#dce4ea;--muted:#8d9aa6;--line:#253545;--lox:#72aaee;--ch4:#e4a846;--cu:#db8c5e;--focus:#72aaee;--warn:#f2867e;--go:#5bc48e;--fluid:#5cc3c9;--on-go:#0e1822;--on-ch4:#0e1822;--on-warn:#0e1822;--glass:#132230d6;--tint-intake:color-mix(in srgb,var(--lox) 18%,transparent);--tint-compression:color-mix(in srgb,var(--lox) 30%,transparent);--tint-power:color-mix(in srgb,var(--ch4) 30%,transparent);--tint-exhaust:color-mix(in srgb,var(--cu) 18%,transparent);--tint-hot:color-mix(in srgb,var(--cu) 12%,var(--surface));--stage:#7d8083;--on-stage:#fff;--stage-deep:#4a4d50;--on-stage-deep:#fff;--label:#15212cc7;--on-label:#fff;--path:#e8772a;--apply:#ffd66b;--path-tint:color-mix(in srgb,var(--path) 16%,transparent);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*,:before,:after{box-sizing:border-box}html,body{height:100%;margin:0}body{background:var(--bg);color:var(--ink);font-family:var(--serif);-webkit-font-smoothing:antialiased;overflow:hidden}button,input,select{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--focus);outline-offset:2px}[hidden]{display:none!important}#app{grid-template-rows:auto 1fr;height:100%;min-height:0;display:grid}header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-end;gap:16px;padding:14px 20px 12px;display:flex}.title h1{font-family:var(--sans);letter-spacing:-.01em;margin:0;font-size:clamp(26px,3.4vw,40px);font-weight:760;font-stretch:72%;line-height:.95}.title p{font-family:var(--sans);color:var(--muted);max-width:66ch;margin:6px 0 0;font-size:14px}.head-right{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:14px;display:flex}.legend{font-family:var(--sans);color:var(--muted);flex-wrap:wrap;gap:14px;font-size:13px;display:flex}.legend span{white-space:nowrap;align-items:center;gap:6px;display:inline-flex}.dot{border-radius:50%;flex:none;width:10px;height:10px;display:inline-block}.d-lox{background:var(--lox)}.d-ch4{background:var(--ch4)}.d-cu{background:var(--cu)}.d-both{background:linear-gradient(90deg,var(--lox) 50%,var(--ch4) 50%)}.d-st{background:var(--muted)}.engine-pick{font-family:var(--sans);align-items:center;gap:8px;font-size:13px;font-weight:600;display:flex}.engine-pick select,.select select,.hud-slider select{background:var(--surface);border:1px solid var(--line);font-family:var(--sans);border-radius:6px;padding:5px 8px;font-size:13px}main{grid-template-columns:minmax(0,1fr) 440px;min-height:0;display:grid}#stage{background:var(--stage);min-height:0;position:relative;overflow:hidden}#c{touch-action:none;cursor:grab;width:100%;height:100%;display:block}#c:active{cursor:grabbing}#c.pick{cursor:pointer}#flag{pointer-events:none;z-index:3;font-family:var(--sans);background:var(--ink);color:var(--bg);white-space:nowrap;opacity:0;border-radius:3px;padding:4px 9px;font-size:13px;font-weight:600;transition:opacity .15s;position:absolute;top:0;left:0;transform:translate(-50%,calc(-100% - 10px))}#flag:after{content:"";background:var(--ink);width:9px;height:9px;position:absolute;bottom:-5px;left:50%;transform:translate(-50%)rotate(45deg)}#flag.on{opacity:1}#nogl{text-align:center;font-family:var(--sans);color:var(--on-stage-deep);background:var(--stage-deep);justify-content:center;align-items:center;padding:24px;display:none;position:absolute;inset:0}#loading{font-family:var(--sans);color:var(--on-stage);background:var(--stage);z-index:5;justify-content:center;align-items:center;font-size:19px;font-weight:700;transition:opacity .4s;display:flex;position:absolute;inset:0}#loading.done{opacity:0;pointer-events:none}#fatal{z-index:6;text-align:center;background:var(--bg);color:var(--ink);font-family:var(--sans);flex-direction:column;justify-content:center;align-items:center;gap:14px;padding:24px;display:flex;position:absolute;inset:0}#fatal p{max-width:44ch;margin:0;font-size:15px;line-height:1.45}.controls{pointer-events:none;z-index:4;flex-wrap:wrap;align-items:center;gap:8px;display:flex;position:absolute;bottom:12px;left:12px;right:12px}.controls>*{pointer-events:auto}.slider,.select{background:var(--glass);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);font-family:var(--sans);border-radius:999px;align-items:center;gap:10px;padding:6px 14px;font-size:13px;font-weight:600;display:flex}.select{padding:3px 4px 3px 14px}.select select{background:0 0;border:0;padding:3px 6px}.slider input{width:min(170px,28vw);accent-color:var(--cu)}.slider.locked{opacity:.6}.btn{background:var(--glass);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);font-family:var(--sans);cursor:pointer;border-radius:999px;padding:7px 13px;font-size:13px;font-weight:600}.btn[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}.btn:hover:not(:disabled){border-color:var(--muted)}.btn:disabled{opacity:.45;cursor:not-allowed}#hud{z-index:4;background:var(--glass);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);width:300px;font-family:var(--sans);border-radius:10px;padding:12px 14px;font-size:13px;position:absolute;top:12px;left:12px}.hud-head{justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px;display:flex}.hud-tag{color:var(--muted);text-transform:none;letter-spacing:.01em;font-size:11.5px;font-weight:600}.phase{border:1px solid var(--line);border-radius:999px;padding:2px 8px;font-size:12px;font-weight:700}.phase[data-phase=CRANKING],.phase[data-phase=STARTING],.phase[data-phase=SHUTDOWN]{background:var(--ch4);color:var(--on-ch4);border-color:#0000}.phase[data-phase=RUNNING]{background:var(--go);color:var(--on-go);border-color:#0000}.phase[data-abort=true]{background:var(--warn);color:var(--on-warn);border-color:#0000}.readouts{grid-template-columns:.9fr 1.35fr .9fr;gap:6px;margin:0 0 10px;display:grid}.readouts div{min-width:0}.readouts dt{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:11px;font-weight:550;overflow:hidden}.readouts dd{font-variant-numeric:tabular-nums;margin:2px 0 0;font-size:22px;font-weight:720;font-stretch:80%;line-height:1}.readouts small{color:var(--muted);font-size:12px;font-weight:600}.pumpbar{gap:4px;margin-bottom:10px;display:grid}.pumpbar span{color:var(--muted);font-size:11px;font-weight:550}.bar{background:var(--line);border-radius:999px;height:6px;overflow:hidden}.bar i{background:linear-gradient(90deg,var(--lox),var(--ch4));border-radius:inherit;width:0;height:100%;display:block}.hud-slider{grid-template-columns:auto 1fr;align-items:center;gap:10px;margin-bottom:10px;font-weight:600;display:grid}.hud-slider input{width:100%;accent-color:var(--cu)}.hud-btns{gap:6px;display:flex}.hud-btns+.hud-slider:has(select){margin-top:10px}.hud-btns .btn{flex:1;padding:7px 8px}.btn.go:not(:disabled){background:var(--go);color:var(--on-go);border-color:#0000}.btn.go[aria-pressed=true]:not(:disabled){background:var(--ink);color:var(--bg);border-color:var(--ink)}.btn.warn:not(:disabled){color:var(--warn);border-color:var(--warn)}.keys{color:var(--muted);margin-top:8px;font-size:12px}.keys summary{cursor:pointer}.keys ul{gap:3px;margin:6px 0 0;padding-left:16px;display:grid}kbd{font-family:var(--sans);border:1px solid var(--line);background:var(--surface);border-bottom-width:2px;border-radius:4px;padding:0 4px;font-size:11px}#caption{z-index:4;background:var(--ink);max-width:min(520px,60%);color:var(--bg);font-family:var(--sans);opacity:0;pointer-events:none;border-radius:8px;padding:9px 14px;font-size:14px;line-height:1.35;transition:opacity .2s;position:absolute;bottom:112px;left:50%;transform:translate(-50%)}#caption.on{opacity:1;pointer-events:auto}#toast{z-index:6;background:var(--ink);color:var(--bg);font-family:var(--sans);opacity:0;pointer-events:none;border-radius:999px;padding:7px 13px;font-size:13px;font-weight:600;transition:opacity .2s;position:absolute;top:14px;left:50%;transform:translate(-50%)}#toast.on{opacity:1}#stage-side{z-index:4;pointer-events:none;flex-direction:column;gap:8px;width:300px;max-height:calc(100% - 120px);display:flex;position:absolute;top:12px;right:12px}.side-card{pointer-events:auto;background:var(--glass);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);min-height:0;font-family:var(--sans);border-radius:10px;padding:12px 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.btn:disabled{opacity:1;cursor:default}.quiz-opts .btn.correct{border:2px solid var(--go)}#fault-card .fault-kicker{color:var(--warn);text-transform:uppercase;letter-spacing:.06em;margin:0;font-size:11px;font-weight:700}#fault-card h3{margin:2px 0 6px;font-size:16px}#fault-card h4{color:var(--muted);margin:8px 0 2px;font-size:12px}#fault-card p{margin:0}#fault-card .btn{margin-top:10px}.controls .tag{background:var(--glass);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);font-family:var(--sans);color:var(--muted);border-radius:999px;padding:5px 11px;font-size:12px;font-weight:600}#caption button{color:inherit;text-underline-offset:2px;cursor:pointer;background:0 0;border:0;margin-left:6px;padding:0;font-weight:650;text-decoration:underline}#panel{border-left:1px solid var(--line);background:var(--surface);-webkit-overflow-scrolling:touch;min-height:0;overflow-y:auto}#index{z-index:2;background:var(--surface);border-bottom:1px solid var(--line);padding:12px 16px;position:sticky;top:0}#index p{font-family:var(--sans);color:var(--muted);margin:0 0 8px;font-size:13px}#chips{flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none;display:flex}.chip{border:1px solid var(--line);font-family:var(--sans);cursor:pointer;white-space:nowrap;background:0 0;border-radius:4px;align-items:center;gap:6px;padding:4px 8px;font-size:12.5px;font-weight:550;display:inline-flex}.chip .n{font-variant-numeric:tabular-nums;color:var(--muted);font-weight:500}.chip[aria-current=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}.chip[aria-current=true] .n{color:inherit;opacity:.7}.chip.step{box-shadow:0 0 0 2px var(--cu)}#info{max-width:68ch;padding:22px 24px 40px}.kicker{font-family:var(--sans);color:var(--muted);align-items:center;gap:8px;margin:0;font-size:13px;display:flex}#info h2{font-family:var(--sans);letter-spacing:-.005em;margin:6px 0 10px;font-size:34px;font-weight:740;font-stretch:75%;line-height:1}.lede{margin:0 0 18px;font-size:19px;line-height:1.45}#info h3{font-family:var(--sans);margin:22px 0 6px;font-size:15px;font-weight:700}#info p{margin:0 0 10px;font-size:16.5px;line-height:1.62}.origin{border-top:2px solid var(--ink);grid-template-columns:auto 1fr;gap:14px;margin:24px 0 0;padding:16px 0 4px;display:grid}.origin .yr{font-family:var(--sans);color:var(--cu);font-variant-numeric:tabular-nums;font-size:44px;font-weight:800;font-stretch:62%;line-height:.85}.origin h3{margin-top:0!important}.note{border-left:3px solid var(--cu);background:var(--bg);margin:22px 0 0;padding:14px 16px}.note h3{margin-top:0!important}.note p:last-child{margin-bottom:0}.step-nav{justify-content:space-between;gap:10px;margin-top:28px;display:flex}.step-nav button{text-align:left;border:1px solid var(--line);cursor:pointer;font-family:var(--sans);color:var(--muted);background:0 0;border-radius:4px;flex:1;padding:10px 12px;font-size:13px}.step-nav button b{color:var(--ink);margin-top:2px;font-size:15px;display:block}.step-nav button.next{text-align:right}.step-nav button:disabled{visibility:hidden}table.specs{border-collapse:collapse;width:100%;font-family:var(--sans);margin-top:6px;font-size:14px}.specs th,.specs td{text-align:left;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums;padding:7px 6px}.specs th{color:var(--muted);font-weight:650}.cap{font-family:var(--sans);color:var(--muted);font-size:12.5px;margin-top:8px!important}.cap a{color:inherit}.flow{width:100%;max-width:380px;height:auto;margin:6px 0 4px;display:block}.flow text{font-family:var(--sans);fill:var(--ink);font-size:11.5px;font-weight:600}.flow .bx{fill:var(--surface);stroke-width:1.6px;transition:fill .25s,stroke-width .25s}.flow .bx.hot{fill:var(--tint-hot);stroke-width:3px}#fps{z-index:6;font:600 12px var(--sans);background:var(--label);color:var(--on-label);border-radius:4px;padding:3px 7px;position:absolute;top:12px;right:12px}body.noui header,body.noui #panel,body.noui .controls,body.noui #hud,body.noui #flag{display:none!important}body.noui main{grid-template-columns:1fr}body.noui #app{grid-template-rows:1fr}body.noui main{grid-template-rows:1fr!important}body.noui #caption,body.noui #toast,body.noui #stage-side{display:none}@media (width<=1100px){main{grid-template-columns:minmax(0,1fr) 360px}#info{padding:18px 18px 32px}}@media (width<=860px){body{overflow:auto}header{padding:10px 14px 9px}.title p{display:none}.legend{gap:10px;font-size:12px}main{grid-template-rows:62vh auto;grid-template-columns:minmax(0,1fr)}#panel{border-left:0;border-top:1px solid var(--line);overflow:visible}#index{padding:10px 0 10px 14px}#index p{display:none}#chips{scrollbar-width:none;flex-wrap:nowrap;padding-right:14px;overflow-x:auto}#chips::-webkit-scrollbar{display:none}#info{padding:18px 16px 32px}#info h2{font-size:29px}.lede{font-size:17.5px}#info p{font-size:16px}.controls{gap:6px;bottom:8px;left:8px;right:8px}.slider,.select{padding:5px 10px}.btn{padding:6px 10px}.slider input{width:22vw}.lg{display:none}#hud{width:min(236px,100% - 16px);padding:9px 10px;top:8px;left:8px}.readouts dd{font-size:18px}#caption{max-width:calc(100% - 24px);font-size:13px;bottom:96px}}@media (width<=520px){.legend,#hud .pumpbar{display:none}}@media (prefers-reduced-motion:reduce){*{transition:none!important}}.d-fluid{background:var(--fluid)}.hud-steps{grid-template-columns:repeat(4,1fr);gap:4px;margin:0 0 6px;padding:0;list-style:none;display:grid}.hud-steps.cols-3{grid-template-columns:repeat(3,1fr)}.hud-steps.cols-5{grid-template-columns:repeat(5,1fr)}.readouts.cols-2{grid-template-columns:1fr 1fr;row-gap:8px}.readouts.cols-4{grid-template-columns:1fr 1.1fr 1fr 1fr}.hud-btns+.hud-btns{margin-top:6px}.hud-steps li{border:1px solid var(--line);border-radius:6px;align-items:baseline;gap:5px;min-width:0;padding:3px 5px;font-size:11px;line-height:1.2;transition:background .15s;display:flex}.hud-steps b{font-weight:760}.hud-steps span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.hud-steps li[data-stroke=intake]{background:var(--tint-intake)}.hud-steps li[data-stroke=compression]{background:var(--tint-compression)}.hud-steps li[data-stroke=power]{background:var(--tint-power)}.hud-steps li[data-stroke=exhaust]{background:var(--tint-exhaust)}.hud-note{color:var(--muted);min-height:3.9em;margin:0 0 10px;font-size:12px;line-height:1.35}.hud-foot{color:var(--muted);margin:6px 0 0;font-size:11px}.hud-slider.crank input{accent-color:var(--muted)}.hud-slider.crank:has(input:disabled){opacity:.5}.readouts #r-stroke{font-size:18px}.hud-slider.load input{accent-color:var(--muted)}@media (width<=700px){.hud-note,.hud-foot,.hud-slider.crank,.hud-slider.load{display:none}#stage-side{width:auto;max-height:42%;inset:auto 8px 96px}}#machine-compare{border:1px solid var(--line);background:var(--surface);width:min(920px,100vw - 32px);max-height:calc(100dvh - 32px);color:var(--ink);font-family:var(--sans);box-sizing:border-box;border-radius:14px;padding:0}#machine-compare::backdrop{background:#0a101673}.cmp-head{z-index:1;background:var(--surface);border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:8px 12px;padding:14px 16px;display:flex;position:sticky;top:0}.cmp-head h2{flex:auto;margin:0;font-size:17px}.cmp-tabs{gap:6px;display:flex}.cmp-tabs .btn[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}.cmp-body{padding:4px 16px 0}.cmp-intro{color:var(--muted);margin:12px 0 4px;font-size:14px;line-height:1.45}.cmp-chart{margin:18px 0 0}.cmp-chart figcaption{margin-bottom:6px;font-size:14px}.cmp-chart figcaption span{color:var(--muted)}.cmp-row,.cmp-axis{grid-template-columns:minmax(0,11em) minmax(0,1fr) minmax(0,10em);align-items:center;gap:10px;display:grid}.cmp-row{color:var(--ink);border-radius:6px;margin:0 -4px;padding:3px 4px;font-size:13px;text-decoration:none}.cmp-row:hover,.cmp-row:focus-visible{background:var(--bg)}.cmp-row.cur .cmp-name{font-weight:700}.cmp-row.cur .cmp-name:after{content:" (open)";color:var(--muted);font-weight:400}.cmp-name{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.cmp-track{background:color-mix(in srgb,var(--line) 45%,transparent);border-radius:3px;height:12px;position:relative}.cmp-bar{background:var(--lox);border-radius:3px;min-width:3px;position:absolute;top:0;bottom:0}.cmp-row.cur .cmp-bar{background:var(--go)}.cmp-row.jet .cmp-bar{background:repeating-linear-gradient(135deg,var(--ch4) 0 4px,color-mix(in srgb,var(--ch4) 45%,transparent) 4px 8px)}.cmp-val{font-variant-numeric:tabular-nums;color:var(--muted);font-size:12px}.cmp-row.none .cmp-val{font-style:italic}.cmp-axis{color:var(--muted);margin-top:2px;font-size:11px}.cmp-ticks{height:14px;position:relative}.cmp-ticks i{white-space:nowrap;font-style:normal;position:absolute;transform:translate(-50%)}.cmp-ticks i:first-child{transform:none}.cmp-ticks i:last-child{transform:translate(-100%)}.cmp-note{color:var(--muted);margin:6px 0 0;font-size:12px;line-height:1.45}.cmp-note a{color:var(--lox)}#machine-compare>.cmp-note{border-top:1px solid var(--line);margin:8px 0 0;padding:16px}@media (width<=600px){.cmp-row,.cmp-axis{grid-template-columns:minmax(0,1fr) minmax(0,6.5em);gap:2px 8px}.cmp-name{grid-column:1/-1}.cmp-axis>span:first-child,.cmp-axis>span:last-child{display:none}}