@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700&family=DM+Sans:wght@400;500;600;700&display=swap');
:root{color-scheme:light;--ink:#202a32;--muted:#606e79;--line:#d5dce1;--accent:#ac2440;--surface:#f8f9fa;--yellow:#bd8400;font-family:'DM Sans',Arial,sans-serif;color:var(--ink);background:#edf0f2;font-size:16px}*{box-sizing:border-box}body{margin:0}button,select,input{font:inherit}button,select{color:var(--ink);border:1px solid #c6cfd6;background:#fff;border-radius:5px}button{cursor:pointer;padding:10px 12px;font-size:.875rem;font-weight:500;transition:background .15s}button:hover{background:#e6ebef}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,#viewport:focus-visible{outline:3px solid #3a789e;outline-offset:3px}button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button.primary:hover{background:#8f1831}button[aria-pressed=true]:not(.primary){background:#253540;color:white;border-color:#253540}button.assemble{width:100%;margin-top:15px;background:transparent}a{color:inherit}input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer;margin:11px 0;height:18px}output{font-variant-numeric:tabular-nums}select{padding:10px 30px 10px 10px;max-width:100%;font-size:.875rem}.topbar{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 30px;border-bottom:1px solid var(--line);background:#f8f9fa}.brand{display:flex;align-items:center;gap:10px;font-size:1rem;font-weight:600;text-decoration:none}.brand b{background:#22333f;color:#fff;border-radius:4px;padding:7px 6px;font-size:1rem;letter-spacing:-1px}.lab-label{font-size:.75rem;letter-spacing:.15em;color:var(--muted)}.lab-label span{margin-left:14px;color:var(--accent)}.back{font-size:.875rem;text-decoration:none}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 302px;min-height:calc(100dvh - 64px)}.stage{position:relative;min-width:0;height:calc(100dvh - 64px);min-height:660px;overflow:hidden;background:radial-gradient(ellipse at 50% 48%,#f9fafb 0,#edf0f2 60%,#e2e7eb 100%)}#viewport{position:absolute;inset:0;touch-action:none}#viewport canvas{display:block;max-width:100%;touch-action:none}.heading{position:absolute;left:30px;top:28px;z-index:2;pointer-events:none}.eyebrow{font-size:.75rem;letter-spacing:.16em;color:var(--muted)}h1{font-family:'Barlow Condensed',Arial,sans-serif;font-size:3.1rem;margin:7px 0;font-weight:600;letter-spacing:-.01em}h1 span{font-size:2rem;font-weight:500}h1+p{font-size:.8125rem;color:var(--muted);margin:0}h1+p span{padding:0 5px}.view-tools{position:absolute;right:24px;top:26px;display:flex;gap:6px;z-index:3}.view-tools button{background:#f8fafbda;backdrop-filter:blur(8px)}.camera-presets{position:absolute;right:24px;top:80px;display:flex;gap:4px;z-index:3}.camera-presets button{padding:8px 10px;font-size:.8125rem;background:#f8fafbd9}.stage-hint{position:absolute;left:50%;bottom:148px;transform:translateX(-50%);font-size:.75rem;color:var(--muted);white-space:nowrap;pointer-events:none}.stage-hint span{padding:0 6px}.engine-controls{position:absolute;left:24px;bottom:24px;width:242px;z-index:3;padding:16px;background:#fbfcfdee;backdrop-filter:blur(12px);border:1px solid #d5dde3;border-radius:8px}.play-row{display:flex;align-items:center;gap:10px;margin-bottom:17px}.play-row button{white-space:nowrap;padding:11px 10px}.play-row>span{font-size:.75rem;line-height:1.5;color:var(--muted)}#playIcon{font-size:.75rem;padding-right:5px}.range-label{display:flex;justify-content:space-between;font-size:.8125rem;gap:6px}.range-label output{white-space:nowrap;color:var(--muted)}.angle-row{display:flex;justify-content:space-between;align-items:center;font-size:.8125rem;margin-top:4px}.angle-row label{display:flex;gap:12px}.angle-row button{padding:4px 7px;font-size:.75rem}.explosion-control{position:absolute;left:290px;right:24px;bottom:24px;z-index:3;background:#fbfcfdee;border:1px solid #d5dde3;border-radius:8px;padding:18px 22px;backdrop-filter:blur(12px)}.explosion-control label{display:flex;justify-content:space-between;font-size:.875rem;font-weight:500}.explosion-control output{color:var(--accent)}.explosion-control>div{display:flex;justify-content:space-between;color:var(--muted);font-size:.75rem}.inspector{background:#f8f9fa;border-left:1px solid var(--line);padding:24px 22px;overflow-y:auto;max-height:calc(100dvh - 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@media(max-width:1100px){.workbench{grid-template-columns:minmax(0,1fr) 280px}.inspector{padding:20px 16px}.view-tools{top:145px;left:24px;right:auto}.camera-presets{top:145px;right:18px}.heading{left:24px}.engine-controls{width:215px;left:16px;bottom:16px;padding:13px}.explosion-control{left:244px;right:16px;bottom:16px;padding:17px 14px}.stage-hint{font-size:.6875rem;bottom:144px}.play-row{gap:6px}.play-row button{font-size:.8125rem}.stage{min-height:750px}.inspector{min-height:750px}}
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@media(pointer:coarse){input[type=range]{height:26px}.view-tools button,.camera-presets button{min-height:40px}.engine-controls{row-gap:0}.explosion-control{padding-top:10px;padding-bottom:10px}.engine-controls .angle-row button{min-height:30px}.firing-order button{min-height:40px}.part-actions button{min-height:44px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
.view-tools button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.explosion-control label{gap:8px}.explosion-control output{white-space:nowrap}.explosion-control>.explosion-track{display:block;position:relative}.explosion-track::after{content:'';position:absolute;left:calc(0.9901% + 7.84px);top:50%;height:13px;width:2px;transform:translateY(-50%);background:#526c80;pointer-events:none}#explode{appearance:none;-webkit-appearance:none;background:transparent}#explode::-webkit-slider-runnable-track{height:6px;border-radius:5px;background:linear-gradient(to right,#7895a9 0 0.9901%,#d5dce1 0.9901% 100%)}#explode::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--accent);margin-top:-5px;position:relative;z-index:1}#explode::-moz-range-track{height:6px;border-radius:5px;background:linear-gradient(to right,#7895a9 0 0.9901%,#d5dce1 0.9901% 100%)}#explode::-moz-range-thumb{width:16px;height:16px;border:0;border-radius:50%;background:var(--accent)}.explosion-stops{align-items:center;gap:8px}.explosion-stops button{font-size:.75rem;padding:5px 7px;background:transparent;border-color:transparent}.explosion-stops span{margin-left:auto;white-space:nowrap}@media(max-width:540px){.explosion-stops button{font-size:.6875rem;padding:4px}.explosion-control label{font-size:.8125rem}}
#showEngine{background:#253540;color:white;border-color:#253540;position:absolute;right:0;top:98px;white-space:nowrap}body[data-study=cylinder] #showEngine,body[data-study=bank] #showEngine{display:none}
@media(max-width:800px){#showEngine{left:0;right:auto;top:43px}}@media(max-width:540px){#showEngine{top:85px}}
.focus-bar{position:absolute;left:24px;right:24px;top:100px;z-index:4;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.focus-switch{display:flex;gap:3px;padding:3px;background:#e0e6eb;border-radius:7px}.focus-switch button{border:0;background:transparent;padding:9px 12px}.focus-bar select{background:#f8fafbe8}.focus-bar #exitFocus{margin-left:auto;background:transparent;border-color:transparent;text-decoration:underline;text-underline-offset:4px}
.focus-cycle{position:absolute;left:290px;right:24px;bottom:24px;z-index:3;background:#fbfcfdef;border:1px solid #d5dde3;border-radius:8px;padding:16px 18px;backdrop-filter:blur(12px)}
.focus-cycle-title{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:12px}.focus-cycle-title strong{font-size:1rem;font-weight:600}.focus-cycle-title span{font-size:.75rem;color:var(--muted);font-variant-numeric:tabular-nums}.study-phases{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}.study-phases button{padding:9px 3px;font-size:.75rem;border-color:transparent;background:#e8edf0}.study-phases button[aria-pressed=true]{background:#253540;color:white}
.flow-labels{position:absolute;inset:0;z-index:2;pointer-events:none}.flow-label{position:absolute;transform:translateX(-50%);padding:7px 10px;background:#f8fafbee;border:1px solid #c9d4dc;border-radius:5px;color:#536470;font-size:.8125rem;white-space:nowrap;opacity:.7;box-shadow:0 2px 12px #3647540c}.flow-label::before{content:'';display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:7px;background:currentColor}.flow-label.flow-active{opacity:1}.flow-label.intake.flow-active{color:#096997;border-color:#87bdd8;background:#eef8ff}.flow-label.exhaust.flow-active{color:#b04420;border-color:#dea58d;background:#fff5ee}
body[data-study=cylinder] .parts-section,body[data-study=bank] .parts-section,body[data-study=cylinder] .removed-section,body[data-study=bank] .removed-section,body[data-study=cylinder] .explosion-control,body[data-study=bank] .explosion-control,body[data-study=cylinder] .camera-presets,body[data-study=bank] .camera-presets,body[data-study=cylinder] #cutaway,body[data-study=bank] #cutaway,body[data-study=cylinder] #focus,body[data-study=bank] #focus{display:none}
body[data-study=cylinder] .heading p,body[data-study=bank] .heading p{display:none}body[data-study=cylinder] h1,body[data-study=bank] h1{font-size:2.4rem}body[data-study=cylinder] h1 span,body[data-study=bank] h1 span{font-size:1.5rem}
body[data-study=cylinder] .view-tools,body[data-study=bank] .view-tools{top:28px;right:24px;left:auto}body[data-study=cylinder] .cycle-section,body[data-study=bank] .cycle-section{margin:0;padding:0;border:0}body[data-study=cylinder] .stage-hint,body[data-study=bank] .stage-hint{bottom:152px}
@media(max-width:1100px){.focus-cycle{left:244px;right:16px;bottom:16px;padding:14px}.focus-cycle-title{flex-wrap:wrap;gap:5px}.focus-bar{left:20px;right:20px;gap:6px}.focus-bar button,.focus-bar select{font-size:.75rem}.focus-bar #exitFocus{padding:10px 3px}.study-phases button{font-size:.6875rem}.focus-switch button{padding:9px}}
@media(max-width:800px){.focus-bar{top:95px}body[data-study=cylinder] .inspector,body[data-study=bank] .inspector{grid-template-columns:1fr 1fr}.focus-cycle{left:250px}}
@media(max-width:540px){.focus-bar{left:16px;right:16px;top:94px;gap:8px}.focus-bar #exitFocus{margin-left:0;padding:5px 0}.focus-bar select{margin-left:auto;padding-right:20px}.focus-bar .focus-switch{gap:1px}.focus-switch button{padding:9px 10px}.focus-cycle{left:12px;right:12px;bottom:12px;padding:12px 14px}.focus-cycle-title{margin-bottom:9px}.study-phases button{padding:9px 2px;font-size:.75rem}.flow-label{font-size:.6875rem;padding:6px 8px}.flow-label::before{margin-right:5px}body[data-study=cylinder] .view-tools,body[data-study=bank] .view-tools{right:16px;top:23px}body[data-study=cylinder] #home span,body[data-study=bank] #home span{display:none}body[data-study=cylinder] .stage-hint,body[data-study=bank] .stage-hint{bottom:237px}body[data-study=cylinder] .inspector,body[data-study=bank] .inspector{grid-template-columns:1fr}}
body[data-study=cylinder] .stage-hint,body[data-study=bank] .stage-hint{display:none}
.timing-actions{display:flex;flex-wrap:wrap;gap:6px}.timing-actions button{flex:1;min-width:110px;font-size:.75rem;padding:10px 7px}.timing-section p{font-size:.75rem;line-height:1.55;color:var(--muted);margin:10px 0 0}.timing-section #timingReadout{color:#73561c;font-weight:500}body[data-study=cylinder] .timing-section,body[data-study=bank] .timing-section{display:none}
.channel-actions{display:flex;gap:6px;flex-wrap:wrap}.channel-actions button{display:flex;align-items:center;gap:7px;padding:9px 10px;font-size:.75rem}.channel-actions i{width:9px;height:9px;border-radius:50%;display:inline-block}.oil-dot{background:#d8a528}.water-dot{background:#168ec2}.channel-section p{font-size:.75rem;line-height:1.6;color:var(--muted)}body[data-study=cylinder] .channel-section,body[data-study=bank] .channel-section{display:none}