@font-face{font-family:Oswald;font-style:normal;font-display:swap;font-weight:400;src:url(./oswald-latin-400-normal-BAFo8sP8.woff2) format("woff2"),url(./oswald-latin-400-normal-D1wpMXgf.woff) format("woff")}@font-face{font-family:Oswald;font-style:normal;font-display:swap;font-weight:500;src:url(./oswald-latin-500-normal-B-eyT0Dw.woff2) format("woff2"),url(./oswald-latin-500-normal-DM85Di4w.woff) format("woff")}@font-face{font-family:Oswald;font-style:normal;font-display:swap;font-weight:600;src:url(./oswald-latin-600-normal-plFmSr5g.woff2) format("woff2"),url(./oswald-latin-600-normal-DRToI_2E.woff) format("woff")}@font-face{font-family:Playfair Display;font-style:italic;font-display:swap;font-weight:400;src:url(./playfair-display-latin-400-italic-LeeEXsx5.woff2) format("woff2"),url(./playfair-display-latin-400-italic-hIeePEuE.woff) format("woff")}:root{color-scheme:dark;--asphalt: #0a0a0b;--surface: #111113;--bone: #f5f2ea;--muted: #b6b2aa;--orange: #f26522;--steel: #71767c;--line: #353537;--gutter: clamp(1.25rem, 5.6vw, 7rem);--display: "Oswald", "Arial Narrow", sans-serif;--serif: "Playfair Display", Georgia, serif;--mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:6rem}body{background:var(--asphalt);color:var(--bone);font:400 1rem/1.7 system-ui,sans-serif}body,h1,h2,h3,p,figure{margin:0}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;appearance:none}button:disabled{cursor:default}::selection{background:var(--orange);color:var(--asphalt)}:focus-visible{outline:2px solid var(--orange);outline-offset:7px}svg{width:1.4rem;height:1.4rem;flex-shrink:0}button,summary,a{touch-action:manipulation}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:20;left:1rem;top:-5rem;padding:.7rem 1rem;color:var(--asphalt);background:var(--bone)}.skip-link:focus{top:1rem}#gl{position:fixed;inset:0;width:100%;height:100%;display:block;pointer-events:none;z-index:0}#content{position:relative;z-index:auto}.site-header{position:fixed;inset:0 0 auto;z-index:7;height:6rem;padding:0 var(--gutter);display:flex;align-items:center;justify-content:space-between;background:linear-gradient(#0a0a0bf5,#0a0a0b00)}.text-wordmark{font:500 1.2rem/1 var(--display);letter-spacing:.12em}.text-wordmark span{color:var(--orange);padding:0 .3rem}.header-actions{display:flex;align-items:center;gap:clamp(1.5rem,4vw,4rem)}.header-actions>a{display:flex;gap:.65rem;align-items:center;font:.65rem/1.2 var(--mono);text-transform:uppercase;letter-spacing:.1em}.header-actions>a svg{width:1.1rem}.sound-control{display:flex;flex-direction:column;align-items:flex-end}.sound-profile{color:var(--muted);font:.55rem/1.4 var(--mono);max-width:17rem;text-align:right}.engine-power-row{display:flex;align-items:center;gap:.65rem;padding-top:.25rem}.engine-state{color:var(--muted);font:.5rem/1.4 var(--mono);letter-spacing:.05em}.engine-power{background:transparent;color:var(--orange);border:1px solid var(--line);padding:.35rem .5rem;font:.55rem/1.3 var(--mono);letter-spacing:.04em}.engine-power:disabled,.rev-button:disabled{opacity:.5;cursor:default}.sound-toggle{display:flex;align-items:center;gap:.65rem;background:transparent;border:0;padding:.6rem 0;font:.64rem/1.3 var(--mono);text-transform:uppercase;letter-spacing:.09em}.sound-toggle[aria-pressed=true]{color:var(--orange)}.sound-bars{height:16px;display:flex;align-items:center;gap:3px}.sound-bars i{display:block;background:currentColor;width:2px;height:4px}.sound-bars i:nth-child(2){height:12px}.sound-bars i:nth-child(3){height:8px}.sound-bars i:nth-child(4){height:14px}.sound-toggle[aria-pressed=true] .sound-bars i{animation:sound-bars .8s ease-in-out infinite alternate}.sound-toggle[aria-pressed=true] .sound-bars i:nth-child(2){animation-delay:-.2s}.sound-toggle[aria-pressed=true] .sound-bars i:nth-child(3){animation-delay:-.4s}html[data-engine-state=OFF] .sound-bars i{animation:none!important}@keyframes sound-bars{to{transform:scaleY(.35)}}.chapter-nav{position:fixed;z-index:6;right:1.7rem;top:50%;transform:translateY(-50%);display:grid;gap:.5rem}.chapter-nav a{min-height:28px;min-width:36px;display:flex;align-items:center;justify-content:flex-end;gap:.6rem;position:relative}.chapter-nav a span{font:.57rem/1 var(--mono);color:var(--muted);opacity:0}.chapter-nav a i{width:4px;height:4px;background:var(--steel);border-radius:50%;transition:height .3s,background .3s}.chapter-nav a[aria-current] i{height:20px;background:var(--orange);border-radius:0}.chapter-nav a[aria-current] span,.chapter-nav a:hover span,.chapter-nav a:focus-visible span{opacity:1}.chapter-nav a b{position:absolute;right:3rem;font:.65rem/1 var(--mono);font-weight:400;background:var(--asphalt);color:var(--bone);padding:.5rem;pointer-events:none;opacity:0;white-space:nowrap}.chapter-nav a:hover b,.chapter-nav a:focus-visible b{opacity:1}.engine-control{position:fixed;z-index:3;right:5vw;top:22svh;width:43vw;height:64svh;border:0;padding:0;background:transparent;cursor:grab;touch-action:pan-y;border-radius:50%}.engine-control:active{cursor:grabbing}.engine-inspector{position:fixed;inset:0;width:100%;height:100dvh;max-width:none;max-height:none;margin:0;padding:0;border:0;background:transparent;color:var(--bone);overflow:hidden}.engine-inspector::backdrop{background:transparent}.inspector-open{overflow:hidden}.inspector-open #content,.inspector-open .site-header,.inspector-open .chapter-nav,.inspector-open .reading-progress,.inspector-open #engine-control{visibility:hidden!important}.inspector-topbar{height:80px;padding:1rem 1.5rem;display:flex;justify-content:space-between;align-items:center;gap:1.5rem;background:linear-gradient(var(--asphalt),transparent)}.inspector-topbar>div{min-width:0}.inspector-topbar p,.inspector-kicker{font:.59rem/1.5 var(--mono);text-transform:uppercase;letter-spacing:.12em;color:var(--orange)}.inspector-topbar h2{font:500 1.5rem/1.3 var(--display);white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.inspector-topbar button,.inspector-actions button{padding:.7rem .9rem;border:1px solid var(--line);background:var(--asphalt);color:var(--bone);font:.67rem/1.3 var(--mono);cursor:pointer}.inspector-topbar button span{margin-left:.8rem;font-size:1.1rem}.inspector-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;height:calc(100% - 80px)}.inspector-viewport{position:relative;min-width:0;min-height:0}#inspection-stage{position:absolute;inset:0;border:0;padding:0;background:transparent;cursor:grab;touch-action:pan-y;width:100%;height:100%}#inspection-stage:active{cursor:grabbing}.inspector-actions{position:absolute;top:.5rem;left:1.5rem;display:flex;gap:.5rem}.inspector-actions button[aria-expanded=true]{border-color:var(--orange);color:var(--orange)}.inspector-gesture{position:absolute;bottom:1rem;left:1.5rem;font:.59rem/1.4 var(--mono);color:var(--muted);pointer-events:none}.inspector-panel{padding:1.5rem;overflow-y:auto;overscroll-behavior:contain;border-left:1px solid var(--line);background:#0a0a0bf5}.inspector-views{display:grid;grid-template-columns:repeat(3,1fr);gap:.4rem;margin-bottom:1rem}.inspector-views button,[data-drive-clutch]{padding:.6rem .4rem;border:1px solid var(--line);background:var(--surface);color:var(--muted);font:.65rem/1.4 var(--mono);cursor:pointer}.inspector-views button[aria-pressed=true]{color:var(--orange);border-color:var(--orange)}.inspection-system-controls{margin:1rem 0;padding-top:1rem;border-top:1px solid var(--line)}.inspection-system-controls[hidden],.component-grid button[hidden],.part-source[hidden]{display:none!important}[data-drive-clutch]{margin-top:.6rem;width:100%;color:var(--bone)}[data-drive-clutch][aria-pressed=false]{color:var(--orange);border-color:var(--orange)}.system-readout{font:.63rem/1.5 var(--mono);color:var(--muted);margin-top:.65rem}.part-source{display:inline-block;margin-top:.7rem;font:.7rem/1.5 var(--mono);color:var(--orange)}.content-evidence{margin-top:.7rem;color:var(--muted);font:.7rem/1.6 var(--mono)}.content-evidence p{font:inherit;margin:.2rem 0 0}.content-source{display:inline-flex;align-items:center;min-height:44px;max-width:100%;overflow-wrap:anywhere;color:var(--orange);font:.7rem/1.5 var(--mono)}.sound-scope{position:relative;z-index:5;margin-top:1rem;max-width:37rem;color:var(--muted);font:.75rem/1.65 var(--mono)}.sound-scope[open]{position:relative;background:var(--asphalt);border:1px solid var(--line);padding:.5rem 1rem}.sound-scope summary{min-height:44px;cursor:pointer;display:list-item;padding:.65rem 0;color:var(--bone)}.sound-scope p{margin:.8rem 0;font:inherit}.sound-scope .content-source{display:flex}.ride-controls{margin-top:.9rem;padding-top:.8rem;border-top:1px solid var(--line)}.ride-switch{display:flex;align-items:center;gap:.6rem;font:.75rem/1.5 var(--mono);color:var(--bone);cursor:pointer}.ride-switch input{width:16px;height:16px;accent-color:var(--orange)}.ride-panel[hidden],[data-drive-bench-readouts][hidden],[data-bench-readouts][hidden]{display:none!important}.ride-gauges{display:grid;grid-template-columns:1fr 1fr;gap:.7rem;margin:.9rem 0}.ride-gauges span{display:block;font:.59rem/1.5 var(--mono);color:var(--muted)}.ride-gauges output{font:500 1.35rem/1.5 var(--display);font-variant-numeric:tabular-nums}.ride-panel>label{display:block;margin:.5rem 0;font:.65rem/1.4 var(--mono);color:var(--muted)}.ride-panel input[type=range]{width:100%;display:block;accent-color:var(--orange);cursor:pointer}.ride-actions{display:grid;grid-template-columns:1fr auto;gap:.5rem;margin-top:.9rem}.ride-actions button{padding:.6rem;border:1px solid var(--line);background:var(--surface);color:var(--bone);font:.61rem/1.4 var(--mono);cursor:pointer}[data-ride-hint]{font:.7rem/1.6 system-ui,sans-serif;color:var(--muted);margin-top:.8rem}[data-ride-chart]{display:block;width:100%;height:auto;aspect-ratio:300 / 116;margin-top:.6rem}.inspection-power{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;padding-bottom:1.5rem}.inspection-power>span{flex-basis:100%;font:.65rem/1.4 var(--mono);color:var(--muted)}.inspection-rev{padding:.45rem .7rem;border:1px solid var(--line);background:var(--surface);color:var(--bone);font:.65rem/1.3 var(--mono);cursor:pointer;touch-action:none}.inspection-rev:disabled{opacity:.4;cursor:default}.inspection-rev[aria-pressed=true]{background:var(--orange);color:var(--asphalt)}.inspection-lab{margin:1.1rem 0 1.4rem;padding:1rem 0;border-block:1px solid var(--line)}.inspection-setting,.inspection-meter{display:flex;align-items:center;justify-content:space-between;gap:.6rem;font:.68rem/1.5 var(--mono)}.inspection-setting select{min-width:0;max-width:70%;padding:.45rem;background:var(--surface);color:var(--bone);border:1px solid var(--line);font:.67rem/1.5 var(--mono)}.inspection-meter{margin:.9rem 0 .7rem;color:var(--muted)}.inspection-meter output{color:var(--bone);font-variant-numeric:tabular-nums}#shaft-load{display:block;width:100%;margin:.5rem 0;accent-color:var(--orange);cursor:pointer}#shaft-load-help{color:var(--muted);font:.72rem/1.6 system-ui,sans-serif}.component-grid{display:grid;grid-template-columns:1fr 1fr;gap:.5rem;margin:.7rem 0 1.7rem}.component-grid button{text-align:left;font:.74rem/1.4 system-ui,sans-serif;padding:.65rem;min-height:48px;border:1px solid var(--line);background:var(--surface);color:var(--muted);cursor:pointer}.component-grid button[aria-pressed=true]{border-color:var(--orange);color:var(--bone);background:#f2652215}.part-copy h3{font:500 1.65rem/1.3 var(--display);margin-bottom:.8rem}.part-copy p{font:.85rem/1.65 system-ui,sans-serif;color:var(--muted)}.part-copy details{margin-top:1.3rem;padding-top:.8rem;border-top:1px solid var(--line)}.part-copy summary{font:.75rem/1.5 var(--mono);color:var(--bone);cursor:pointer}.part-copy details p{margin-top:.8rem}.inspection-note{font:.68rem/1.6 system-ui,sans-serif;color:var(--steel);margin-top:2rem}@media(max-width:900px){.inspector-topbar{height:64px;padding:.7rem 1rem;gap:.7rem}.inspector-topbar h2{font-size:1.1rem}.inspector-topbar button{padding:.5rem}.inspector-layout{height:calc(100% - 64px);grid-template-columns:1fr;grid-template-rows:minmax(0,1fr) min(40dvh,320px)}.inspector-panel{padding:1rem;border-left:0;border-top:1px solid var(--line)}.inspector-actions{left:1rem;top:.25rem}.inspector-actions button{padding:.5rem .6rem;font-size:.58rem}.inspector-gesture{left:1rem;bottom:.6rem;font-size:.54rem}.inspection-power{padding-bottom:.8rem}.inspection-power>span{flex-basis:auto;margin-right:auto}.component-grid{margin-bottom:1rem}}html:not(.webgl-ready) .engine-control{display:none}html[data-scene=families] .engine-control,html[data-scene=bikes] .engine-control,html[data-scene=culture] .engine-control,html[data-scene=numbers] .engine-control,html[data-scene=sources] .engine-control{visibility:hidden;pointer-events:none}.reading-progress{position:fixed;bottom:0;left:0;height:2px;width:100%;z-index:8;pointer-events:none;background:#f5f2ea08}.reading-progress span{display:block;background:var(--orange);width:100%;height:100%;transform:scaleX(0);transform-origin:left}.chapter{padding:9rem var(--gutter) 7rem;position:relative}.hero{min-height:100svh;padding-top:clamp(10rem,24svh,18rem);display:flex;flex-direction:column;justify-content:flex-start}.hero-heading{position:relative;width:max-content;max-width:56%;pointer-events:none}h1{font:600 clamp(5rem,11vw,12.2rem)/.94 var(--display);letter-spacing:-.045em}.hero-year{display:block;font:italic 400 clamp(2.3rem,5vw,5.2rem)/1.15 var(--serif);letter-spacing:-.025em;margin:1.7rem 0 0 -.1em;color:var(--orange)}.hero-copy{font:.85rem/1.7 var(--mono);color:var(--muted);margin-top:2rem;max-width:26rem}.hero-origin{font:.63rem/1.4 var(--mono);letter-spacing:.11em;text-transform:uppercase;margin-top:2.4rem}.hero-origin span{color:var(--orange);margin:0 .6rem}.hero-byline{font:.63rem/1.4 var(--mono);letter-spacing:.11em;text-transform:uppercase;margin-top:.55rem;color:color-mix(in srgb,var(--bone) 55%,transparent)}.hero-byline strong{color:var(--orange);font-weight:500}.hero-bottom{margin-top:auto;padding-top:3rem;display:flex;justify-content:space-between;gap:2rem;align-items:center}.scroll-cue{display:flex;align-items:center;gap:1.7rem;font:.64rem/1.5 var(--mono);text-transform:uppercase;letter-spacing:.1em}.scroll-cue span{font:1.6rem/1 system-ui,sans-serif;color:var(--orange)}.interaction-hint{font:.61rem/1.6 var(--mono);color:var(--muted);letter-spacing:.035em}.render-note{max-width:27rem;margin-top:1.5rem;color:var(--muted);font-size:.8rem}.noscript-note{position:fixed;bottom:0;left:0;z-index:10;background:var(--surface);padding:.5rem 1rem;font-size:.75rem}.chapter-index{font:.64rem/1.6 var(--mono);text-transform:uppercase;letter-spacing:.17em;color:var(--muted);margin-bottom:2rem}.chapter-index span{color:var(--orange);margin:0 .5rem}h2{font:500 clamp(3.3rem,7.6vw,8.25rem)/1.03 var(--display);letter-spacing:-.035em;text-wrap:balance}h3{font:500 2rem/1.14 var(--display);letter-spacing:-.02em}.heritage-quote{font:italic 400 clamp(1.5rem,2.4vw,2.7rem)/1.55 var(--serif);letter-spacing:-.03em}.origin{padding-bottom:6rem}.origin-opening{max-width:42%}.origin-opening .heritage-quote{margin:3rem 0 4rem;color:var(--muted)}.origin-beats{display:grid;gap:2rem}.origin-beats article{padding-top:1.4rem;border-top:1px solid var(--line)}.origin-beats h3{font:.9rem/1.5 var(--mono);color:var(--orange);margin-bottom:.65rem}.origin-beats p{color:var(--muted);font-size:.93rem}.history-archive{margin-top:5rem;position:relative;z-index:4;background:var(--asphalt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.history-archive summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:2rem;padding:1.5rem 0;font:500 1.3rem/1.3 var(--display);letter-spacing:.02em}.history-archive summary::-webkit-details-marker{display:none}.history-archive summary span{margin-left:auto;color:var(--muted);font:.67rem/1.4 var(--mono)}.history-archive summary svg{color:var(--orange);transition:transform .3s}.history-archive[open] summary svg{transform:rotate(90deg)}.history-list{list-style:none;padding:0;margin:1rem 0 3rem}.history-list li{display:grid;grid-template-columns:minmax(6rem,.28fr) 1fr;gap:2rem;padding:1.4rem 0;border-top:1px solid var(--line)}.history-list h3{color:var(--orange);font:.85rem/1.8 var(--mono)}.history-list p{color:var(--muted);max-width:53rem;font-size:.9rem}.engines{padding:0 var(--gutter)}.engine-intro{padding-top:9rem;min-height:95svh}.engine-intro .section-heading{max-width:55%}.intro-copy{margin:2rem 0;color:var(--muted);font-size:.95rem}.text-link{display:inline-flex;align-items:center;gap:2rem;font:.67rem/1.5 var(--mono);text-transform:uppercase;letter-spacing:.06em;padding:.6rem 0;border-bottom:1px solid var(--orange)}.text-link svg{color:var(--orange)}.era{min-height:135svh;position:relative;padding-bottom:25svh;scroll-margin-top:0}.era-copy{position:sticky;top:max(6rem,14svh);padding:1rem 0;width:39%}.era-counter{color:var(--muted);font:.62rem/1.5 var(--mono);letter-spacing:.16em}.era-counter span{color:var(--orange);padding:0 .45rem}.era-years{font:.9rem/1.4 var(--mono);color:var(--orange);margin:3rem 0 1.2rem}.era h3{font:500 clamp(2.6rem,5.2vw,5.4rem)/1.08 var(--display);letter-spacing:-.035em;text-wrap:balance}.era-signature{max-width:25rem;color:var(--muted);margin-top:1.5rem;font-size:.96rem}.era-comparison{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--line)}.era-comparison h4{margin:0 0 .65rem;font:.59rem/1.4 var(--mono);letter-spacing:.06em;text-transform:uppercase}.era-comparison ul{margin:0;padding-left:.95rem;font-size:.72rem;line-height:1.55;color:var(--muted)}.era-comparison li+li{margin-top:.45rem}.era-line{display:block;margin-top:2.5rem;width:3rem;height:1px;background:var(--orange)}.lesson-entry{position:relative;z-index:4;display:inline-flex;align-items:center;gap:1rem;min-height:44px;padding:.65rem .8rem;margin-top:1.25rem;border:1px solid var(--orange);background:var(--asphalt);color:var(--bone);font:.64rem/1.4 var(--mono);text-align:left;cursor:pointer}.lesson-entry:disabled{display:none}.era-copy:has(.lesson-entry){z-index:4}.lesson-entry:hover,.lesson-entry:focus-visible{background:#f265221a}.lesson-entry svg{width:1rem;height:1rem;color:var(--orange)}.lesson-intro-entry{display:flex;width:fit-content}.lesson-fallback{margin-top:1rem;border-top:1px solid var(--line);font:.8rem/1.7 system-ui,sans-serif;color:var(--muted)}.lesson-fallback summary{padding:.75rem 0;cursor:pointer;color:var(--bone)}.lesson-fallback article{margin:1rem 0}.lesson-fallback h4{font-size:1rem}.lesson-fallback p{margin:.7rem 0}.lesson-fallback ul{padding-left:1rem}.lesson-fallback a{color:var(--orange);overflow-wrap:anywhere}.lesson-fallback li>span{display:block;font-size:.7rem}.lessons-ready .lesson-fallback{display:none}.lessons-open{overflow:hidden}.lessons-open #gl,.lessons-open #content,.lessons-open .site-header,.lessons-open .chapter-nav,.lessons-open #engine-control,.lessons-open .reading-progress{visibility:hidden!important}.engine-school{position:fixed;inset:0;width:100%;max-width:none;height:100dvh;max-height:none;margin:0;padding:0;border:0;background:#0a0a0b;color:var(--bone);overflow:hidden}.engine-school[open]{display:grid;grid-template-rows:auto minmax(0,1fr)}.engine-school::backdrop{background:#0a0a0bf5}.lesson-header{display:flex;justify-content:space-between;align-items:center;gap:1.5rem;min-height:94px;padding:1.1rem max(1.5rem,calc((100vw - 1360px)/2));border-bottom:1px solid var(--line)}.lesson-header>div{min-width:0}.lesson-header p{font:.6rem/1.6 var(--mono);letter-spacing:.1em;color:var(--orange)}.lesson-header h2{font:500 clamp(1.3rem,2.4vw,2rem)/1.15 var(--display);margin-top:.3rem}.lesson-header button{flex-shrink:0;min-height:44px;padding:.7rem 1rem;border:1px solid var(--line);color:var(--bone);background:var(--surface);font:.7rem/1.3 var(--mono);cursor:pointer}.lesson-scroll{min-height:0;overflow:auto;overscroll-behavior:contain;padding:1.5rem max(1.5rem,calc((100vw - 1360px)/2)) 3rem}.lesson-controls{display:grid;grid-template-columns:minmax(0,2fr) minmax(100px,.6fr) minmax(0,1fr);gap:1rem}.lesson-views{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:.6rem;margin-bottom:1.2rem}.lesson-views button{min-width:0;min-height:44px;padding:.7rem 1rem;border:1px solid var(--line);background:var(--surface);color:var(--muted);font:.7rem/1.4 var(--mono);cursor:pointer}.lesson-views button[aria-pressed=true]{border-color:var(--orange);color:var(--bone);background:#f2652212}[data-lesson-panel][hidden],[data-dtc-panel][hidden],[data-ecosystem-panel][hidden],[data-comparison-panel][hidden],.lesson-filters[hidden],[data-lesson-status][hidden],[data-dtc-context][hidden],[data-fuel-panel][hidden]{display:none!important}.dtc-heading>p:first-child{color:var(--orange);font:.6rem/1.5 var(--mono);letter-spacing:.1em}.dtc-heading h3{font:500 clamp(1.6rem,3vw,2.5rem)/1.2 var(--display);margin:.5rem 0}.dtc-heading p,.dtc-scope-warning,.dtc-context p{color:var(--muted);font:.82rem/1.7 system-ui,sans-serif}.dtc-controls{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1.3fr) minmax(0,.8fr);gap:.8rem;margin-top:1.2rem}.dtc-controls label{display:grid;gap:.4rem;min-width:0;color:var(--muted);font:.65rem/1.5 var(--mono)}.dtc-controls input,.dtc-controls select{width:100%;min-width:0;min-height:44px;padding:.7rem;border:1px solid var(--line);background:#151516;color:var(--bone);font:.8rem/1.5 system-ui,sans-serif;border-radius:0}.dtc-scope-warning{margin-top:.8rem}.dtc-context{margin-top:1rem;padding:.8rem 1rem;border-left:3px solid var(--steel);background:var(--surface)}.dtc-context strong{display:block;font:.68rem/1.5 var(--mono)}.dtc-context p{margin-top:.3rem}.dtc-guide{border-block:1px solid var(--line);margin-top:1rem}.dtc-guide summary{min-height:44px;padding:.8rem 0;font:.7rem/1.5 var(--mono);cursor:pointer}.dtc-guide-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;padding:.5rem 0 1rem}.dtc-guide-cards h4{font:500 1rem/1.4 var(--display);margin-bottom:.5rem}.dtc-guide-cards p{color:var(--muted);font:.8rem/1.7 system-ui,sans-serif}.dtc-result-count{margin:1.2rem 0 .7rem;font:.7rem/1.5 var(--mono);color:var(--steel)}.dtc-reading{display:grid;grid-template-columns:minmax(240px,330px) minmax(0,1fr);gap:1.5rem;align-items:start}.dtc-results{display:flex;flex-direction:column;gap:.5rem;max-height:650px;overflow:auto;overscroll-behavior:contain}.dtc-result{min-height:60px;padding:.9rem;border:1px solid var(--line);background:var(--surface);color:var(--bone);text-align:left;cursor:pointer}.dtc-result[aria-pressed=true]{border-color:var(--orange);background:#f2652210}.dtc-result strong{display:block;font:500 1.1rem/1.4 var(--mono);color:var(--orange)}.dtc-result span{display:block;font:.8rem/1.5 system-ui,sans-serif;margin-top:.4rem}.dtc-result small{display:block;font:.6rem/1.5 var(--mono);color:var(--muted);margin-top:.4rem}.dtc-detail{min-width:0;padding:1.2rem;border:1px solid var(--line);background:#121213}.dtc-module{color:var(--orange);font:.63rem/1.5 var(--mono)}.dtc-entry h4{font:500 1.4rem/1.4 var(--display);margin-top:.5rem}.dtc-entry h4>span{display:block;font:500 2rem/1.5 var(--mono)}.dtc-entry h5{font:.67rem/1.5 var(--mono);margin:1rem 0 .6rem}.dtc-entry p,.dtc-entry ul,.dtc-empty p{color:var(--muted);font:.83rem/1.75 system-ui,sans-serif}.dtc-entry ul{padding-left:1.1rem}.dtc-manual-scope li>span{display:block;margin-top:.3rem}.dtc-entry-note,.dtc-profile-note,.dtc-verdict-note{margin-top:1rem}.dtc-source-reading{margin-top:1rem;border-top:1px solid var(--line)}.dtc-source-reading summary{min-height:44px;padding:.8rem 0;font:.68rem/1.5 var(--mono);cursor:pointer}.dtc-sources{padding:0!important;list-style:none}.dtc-sources li+li{margin-top:.8rem}.dtc-sources a{color:var(--orange);overflow-wrap:anywhere}.dtc-source-access{display:block;font-size:.7rem;margin-top:.3rem}.dtc-reference-date{color:var(--muted);font:.65rem/1.6 var(--mono);margin-top:1.3rem}.dtc-empty h4{font:500 1.25rem/1.4 var(--display)}.dtc-empty p{margin-top:.8rem}.dtc-fallback{margin-top:1.5rem;border-top:1px solid var(--line);color:var(--muted);font:.8rem/1.7 system-ui,sans-serif}.dtc-fallback summary{min-height:44px;padding:.8rem 0;color:var(--bone);cursor:pointer}.dtc-fallback-codes article{margin:1rem 0;padding:.8rem 0;border-top:1px solid var(--line)}.dtc-fallback h4{font:500 1.1rem/1.5 var(--display);color:var(--bone)}.lessons-ready .dtc-fallback{display:none}.ecosystem-panel{display:grid;grid-template-columns:minmax(260px,340px) minmax(0,1fr);gap:1rem 1.5rem;align-items:start}.ecosystem-heading,.ecosystem-controls,.ecosystem-status,.ecosystem-context,.ecosystem-drag,.ecosystem-date{grid-column:1 / -1}.ecosystem-heading>p:first-child,.ecosystem-category-badges,.ecosystem-budget-band{color:var(--orange);font:.62rem/1.6 var(--mono)}.ecosystem-heading h3{font:500 clamp(1.6rem,3vw,2.5rem)/1.2 var(--display);margin:.5rem 0}.ecosystem-panel p,.ecosystem-panel li,.ecosystem-panel dd{color:var(--muted);font:.83rem/1.75 system-ui,sans-serif}.ecosystem-panel .ecosystem-heading>p:first-child{color:var(--orange);font:.62rem/1.6 var(--mono)}.ecosystem-controls{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}.ecosystem-controls label{display:grid;gap:.4rem;min-width:0;color:var(--muted);font:.65rem/1.5 var(--mono)}.ecosystem-controls select{width:100%;min-width:0;min-height:44px;padding:.7rem;border:1px solid var(--line);background:#151516;color:var(--bone);font:.8rem/1.5 system-ui,sans-serif;border-radius:0}.ecosystem-panel .ecosystem-status{color:var(--steel);font:.65rem/1.5 var(--mono)}[data-ecosystem-company-detail]{grid-column:1;min-width:0}.ecosystem-company{padding:1.1rem;border:1px solid var(--line);background:#121213}.ecosystem-company h4,.ecosystem-budget-path h4{font:500 1.6rem/1.3 var(--display);margin:.4rem 0 .7rem}.ecosystem-company h5,.ecosystem-budget-breakdown h5,.ecosystem-drag-cards h5,.ecosystem-price-examples h5{font:.7rem/1.5 var(--mono);color:var(--bone);margin:.8rem 0 .4rem}.ecosystem-panel .ecosystem-category-badges,.ecosystem-panel .ecosystem-budget-band{color:var(--orange);font:.62rem/1.6 var(--mono)}.ecosystem-company p+p{margin-top:.7rem}.ecosystem-company-simple{padding:.7rem;background:#ffffff04;border-left:2px solid var(--steel)}.ecosystem-company-simple strong{color:var(--bone)}.ecosystem-concept h5{color:var(--orange);font:.68rem/1.5 var(--mono);margin:.9rem 0 .5rem}.ecosystem-concept-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.1rem;list-style:none;padding:0;margin:1rem 0}.ecosystem-concept-flow li{position:relative;min-width:0;padding:.75rem .6rem;border:1px solid var(--line);background:#0a0a0b}.ecosystem-concept-flow li:last-child{border-color:#f2652266}.ecosystem-concept-flow span{display:block;font:.58rem/1.5 var(--mono);color:var(--steel);margin-bottom:.3rem}.ecosystem-concept-flow strong{display:block;color:var(--bone);font:500 .82rem/1.5 system-ui,sans-serif;overflow-wrap:anywhere}.ecosystem-concept-flow i{position:absolute;right:-.9rem;top:50%;transform:translateY(-50%);color:var(--steel);font: 1rem/1 system-ui,sans-serif}.ecosystem-concept-checks{display:grid;grid-template-columns:1fr 1fr;gap:.7rem 1rem;margin:.8rem 0}.ecosystem-concept-checks dt{color:var(--bone);font:.67rem/1.5 var(--mono);margin-bottom:.3rem}.ecosystem-concept-checks dd{margin:0}.ecosystem-upgrade-details{border-top:1px solid var(--line);margin-top:1rem}.ecosystem-upgrade-details>p{margin-bottom:.6rem}.ecosystem-company ul,.ecosystem-budget-path ul{padding-left:1.1rem}.ecosystem-budget{grid-column:2;min-width:0}.ecosystem-budget>h4,.ecosystem-drag>h4{font:500 1.25rem/1.4 var(--display);margin-bottom:.8rem}.ecosystem-budget-buttons{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:.4rem;margin-bottom:1rem}.ecosystem-budget-button{min-width:0;min-height:70px;padding:.7rem .6rem;border:1px solid var(--line);background:var(--surface);color:var(--bone);cursor:pointer;text-align:left}.ecosystem-budget-button span{display:block;font:.68rem/1.45 var(--mono)}.ecosystem-budget-button small{display:block;font:.62rem/1.5 system-ui,sans-serif;color:var(--muted);margin-top:.35rem}.ecosystem-budget-button[aria-pressed=true]{border-color:var(--orange);background:#f2652212}.ecosystem-budget-path{padding:1.1rem;border:1px solid var(--line);background:#121213}.ecosystem-budget-scope,.ecosystem-drag-scope{padding-top:.6rem}.ecosystem-route-figure{margin:.9rem 0;max-width:620px;padding:.5rem;border:1px solid var(--line);background:#0a0a0b}.ecosystem-route{display:block;width:100%;height:auto;aspect-ratio:400 / 225}.ecosystem-route-figure figcaption{color:var(--muted);font:.75rem/1.6 system-ui,sans-serif;padding:.4rem}.ecosystem-budget-breakdown{display:grid;grid-template-columns:1fr 1fr;gap:.7rem 1rem}.ecosystem-source-reading,.ecosystem-company-notes,.ecosystem-cost-notes,.ecosystem-price-notes{border-top:1px solid var(--line);margin-top:1rem}.ecosystem-panel summary,.ecosystem-fallback summary{min-height:44px;padding:.75rem 0;color:var(--bone);font:.7rem/1.5 var(--mono);cursor:pointer}.ecosystem-sources{padding:0!important;list-style:none;margin:.6rem 0}.ecosystem-sources li+li{margin-top:.6rem}.ecosystem-sources a{color:var(--orange);overflow-wrap:anywhere}.ecosystem-sources span{display:block;font-size:.7rem}.ecosystem-cost-notes dl{display:grid;grid-template-columns:1fr 1fr;gap:1rem;padding:.5rem 0 1rem}.ecosystem-cost-notes dt{color:var(--bone);font:.7rem/1.5 var(--mono);margin-bottom:.4rem}.ecosystem-cost-notes dd{margin:0}.ecosystem-price-examples,.ecosystem-drag-cards{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.ecosystem-price-examples article,.ecosystem-drag-cards article{min-width:0;padding:1rem;border:1px solid var(--line)}.ecosystem-price-examples strong{display:block;font:500 1.25rem/1.5 var(--mono);color:var(--orange);margin:.5rem 0}.ecosystem-price-examples p+p{margin-top:.5rem}.ecosystem-drag{margin-top:1rem;padding-top:1.2rem;border-top:1px solid var(--line)}.ecosystem-context{padding:.8rem 1rem;border-left:3px solid var(--steel);background:var(--surface)}.ecosystem-context[hidden]{display:none}.ecosystem-panel .ecosystem-date{font:.65rem/1.6 var(--mono)}.ecosystem-fallback{margin-top:1.5rem;border-top:1px solid var(--line);color:var(--muted);font:.8rem/1.7 system-ui,sans-serif}.ecosystem-fallback h4{color:var(--bone);font:500 1.2rem/1.4 var(--display);margin:1rem 0}.ecosystem-fallback .ecosystem-company,.ecosystem-fallback .ecosystem-budget-path{margin:1rem 0}.ecosystem-fallback .ecosystem-drag-scope{color:var(--muted)}.lessons-ready .ecosystem-fallback{display:none}.comparison-heading>p:first-child{color:var(--orange);font:.62rem/1.6 var(--mono)}.comparison-heading h3{font:500 clamp(1.7rem,3vw,2.5rem)/1.2 var(--display);margin:.5rem 0}.comparison-panel p,.comparison-panel figcaption{color:var(--muted);font:.83rem/1.75 system-ui,sans-serif}.comparison-caveat{padding:.8rem 1rem;border-left:3px solid var(--steel);background:var(--surface);margin-top:.8rem}.comparison-bike-panels,.comparison-readouts{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:.8rem;margin:1rem 0}.comparison-bike,.comparison-readout{min-width:0;padding:.8rem 1rem;border:1px solid var(--line);background:#121213}.comparison-lane-a{border-top:2px solid var(--orange)}.comparison-lane-b{border-top:2px dashed #8cbdda}.comparison-bike h4,.comparison-readout h4{font:500 1.1rem/1.4 var(--display);margin:0 0 .5rem}.comparison-bike [data-comparison-bike-note]{display:none}.comparison-bike label,.comparison-control{display:grid;gap:.4rem;color:var(--muted);font:.67rem/1.5 var(--mono);min-width:0}.comparison-panel select,.comparison-panel input[type=number]{width:100%;min-width:0;min-height:44px;border:1px solid var(--line);padding:.6rem;color:var(--bone);background:#151516;border-radius:0;font:.82rem/1.5 system-ui,sans-serif}.comparison-panel input[type=range]{width:100%;min-height:44px;accent-color:var(--orange)}.comparison-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.8rem;margin:1rem 0}.comparison-controls output,.comparison-settings output{color:var(--bone)}.comparison-visuals{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:1rem;align-items:start;margin-top:1.2rem}.comparison-graph-frame,.comparison-speed-figure{min-width:0;margin:0;padding:.8rem;background:#101011;border:1px solid var(--line)}.comparison-graph-frame h4,.comparison-speed-figure h4{font:.72rem/1.5 var(--mono);margin-bottom:.5rem}.comparison-graph-canvas{display:block;width:100%;height:clamp(300px,24vw,360px);touch-action:pan-y}.comparison-graph-canvas[hidden]{display:none}.comparison-graph-frame[data-graph-recoverable=false] .comparison-graph-canvas{height:0}svg.comparison-speed-chart{display:block;width:100%;height:auto}.comparison-view-controls{display:flex;flex-wrap:wrap;gap:.4rem;margin:.6rem 0}.comparison-panel button{min-height:44px;padding:.6rem .8rem;background:var(--surface);border:1px solid var(--line);color:var(--bone);font:.67rem/1.4 var(--mono);cursor:pointer}.comparison-panel button[aria-pressed=true]{border-color:var(--orange);background:#f2652212}.comparison-panel button:disabled{opacity:.55;cursor:default}.comparison-graph-status{padding:.6rem 0;font:.68rem/1.6 var(--mono)!important}.comparison-playback{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;margin-top:1.2rem}.comparison-timeline{display:grid;gap:.4rem;min-width:0;color:var(--muted);font:.7rem/1.5 var(--mono);margin-top:.8rem}.comparison-readout dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.6rem;margin:.5rem 0}.comparison-readout dt{color:var(--muted);font:.62rem/1.5 var(--mono)}.comparison-readout dd{margin:.25rem 0 0;font:500 1rem/1.4 var(--mono);color:var(--bone)}.comparison-settings,.comparison-assumptions{border-block:1px solid var(--line);margin-top:1rem}.comparison-panel summary,.comparison-fallback summary{min-height:44px;padding:.8rem 0;color:var(--bone);font:.7rem/1.5 var(--mono);cursor:pointer}.comparison-settings>div{padding:.5rem 0 1rem}.comparison-assumptions ul{padding-left:1.2rem;color:var(--muted);font:.8rem/1.7 system-ui,sans-serif}.comparison-assumptions li+li{margin-top:.5rem}.comparison-table-wrap{width:100%;overflow:auto;margin:.8rem 0}.comparison-table{width:100%;border-collapse:collapse;font:.75rem/1.6 var(--mono);color:var(--muted)}.comparison-table th,.comparison-table td{padding:.6rem;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}.comparison-table th{color:var(--bone);font-weight:400}.comparison-table th:first-child,.comparison-table td:first-child{text-align:left}.comparison-fallback{margin-top:1.5rem;border-top:1px solid var(--line);color:var(--muted);font:.8rem/1.7 system-ui,sans-serif}.comparison-fallback svg.comparison-speed-chart{max-width:680px}.lessons-ready .comparison-fallback{display:none}.fuel-heading>p:first-child{font:.62rem/1.5 var(--mono);color:var(--orange)}.fuel-heading h3{font:500 clamp(1.7rem,3vw,2.5rem)/1.2 var(--display);margin:.5rem 0}.fuel-panel p,.fuel-panel li,.fuel-panel figcaption{color:var(--muted);font:.83rem/1.75 system-ui,sans-serif}.fuel-controls{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.5rem;margin:1rem 0 .5rem}.fuel-controls button{min-width:0;min-height:44px;padding:.6rem;background:var(--surface);color:var(--bone);border:1px solid var(--line);font:.7rem/1.4 var(--mono);cursor:pointer}.fuel-controls button[aria-pressed=true]{border-color:var(--orange);background:#f2652212}.fuel-status{font:.67rem/1.5 var(--mono)!important;color:var(--steel)!important;margin:.5rem 0}.fuel-key{margin:.8rem 0 1rem}.fuel-key span{margin-right:.8rem;border-bottom:2px solid;white-space:nowrap}.fuel-key-air{color:#b6b2aa}.fuel-key-fuel{color:var(--orange)}.fuel-key-signal{color:#8cbdda}.fuel-key-spark{color:#ffe09a}.fuel-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;align-items:start}.fuel-card{min-width:0;padding:1rem;border:1px solid var(--line);background:#121213}.fuel-card header>p:first-child{font:.64rem/1.6 var(--mono);color:var(--steel)}.fuel-card h4{font:500 1.6rem/1.3 var(--display);margin:.4rem 0 .6rem}.fuel-card h5,.fuel-warmup h5{font:.7rem/1.5 var(--mono);color:var(--bone);margin:.8rem 0 .4rem}.fuel-graphic{margin:1rem 0;min-width:0;background:#0a0a0b;border:1px solid var(--line);padding:.5rem}.fuel-graphic svg{display:block;width:100%;height:auto}.fuel-graphic svg.fuel-diagram{aspect-ratio:400 / 300}.fuel-graphic svg.ignition-diagram{aspect-ratio:400 / 240}.fuel-graphic figcaption{padding:.5rem .3rem .2rem;font-size:.75rem}.fuel-watch{margin-top:.6rem;border-left:2px solid var(--steel);padding-left:.7rem}.fuel-reading{border-top:1px solid var(--line);margin-top:1rem}.fuel-panel summary,.fuel-fallback summary{min-height:44px;padding:.8rem 0;color:var(--bone);font:.7rem/1.5 var(--mono);cursor:pointer}.fuel-parts{padding:0;list-style:none;margin:.5rem 0 1rem}.fuel-parts li{display:grid;grid-template-columns:1.6rem minmax(0,1fr);gap:.6rem;margin-top:.7rem}.fuel-parts li>span{border:1px solid var(--line);border-radius:50%;height:1.6rem;line-height:1.6rem;text-align:center;font-size:.7rem;color:var(--bone)}.fuel-parts strong{color:var(--bone);font-size:.8rem}.fuel-sources{padding:0;list-style:none;margin:.5rem 0 1rem}.fuel-sources li+li{margin-top:1rem}.fuel-sources a{color:var(--orange);overflow-wrap:anywhere}.fuel-sources p{font-size:.75rem}.fuel-ignition{border-top:1px solid var(--line);padding-top:1.2rem;margin-top:1.5rem}.fuel-ignition h3{font:500 1.7rem/1.3 var(--display);margin-bottom:.6rem}.fuel-ignition .fuel-controls{grid-template-columns:repeat(3,minmax(0,1fr))}.fuel-ignition-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:1.2rem;align-items:start}.fuel-ignition-copy{padding-top:.8rem}.fuel-ignition-copy h4{font:500 1.3rem/1.4 var(--display);margin:.5rem 0}.fuel-ignition-copy ul{padding-left:1.1rem}.fuel-ignition-copy li+li{margin-top:.5rem}.fuel-table-wrap{max-width:100%;overflow:auto}.fuel-table{width:100%;border-collapse:collapse;table-layout:fixed;font:.8rem/1.65 system-ui,sans-serif;color:var(--muted)}.fuel-table th,.fuel-table td{text-align:left;vertical-align:top;padding:.7rem;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.fuel-table th{color:var(--bone);font-weight:500}.fuel-table th:first-child{width:22%}.fuel-table caption{text-align:left;padding:.7rem 0}.fuel-warmup{margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--line)}.fuel-warmup>h4{font:500 1.5rem/1.3 var(--display);margin:.3rem 0 .6rem}.fuel-warmup-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.8rem;margin-top:1rem}.fuel-warmup-cards article{padding:.9rem;border:1px solid var(--line);min-width:0}.fuel-warmup-cards article>span{font:.7rem/1.5 var(--mono);color:var(--orange)}.fuel-scope{margin-top:1rem;font-size:.75rem!important}.fuel-fallback{border-top:1px solid var(--line);margin-top:1.5rem;color:var(--muted);font:.8rem/1.7 system-ui,sans-serif}.fuel-fallback .fuel-card{margin:.7rem 0}.fuel-fallback .fuel-graphic{max-width:600px}.lessons-ready .fuel-fallback{display:none}@media(max-width:800px){.fuel-pair,.fuel-ignition-layout{grid-template-columns:minmax(0,1fr)}.fuel-warmup-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.fuel-card{padding:.8rem}}@media(max-width:450px){.lesson-views button:last-child{grid-column:1 / -1}.fuel-controls{grid-template-columns:1fr 1fr}.fuel-controls button{font-size:.65rem}.fuel-warmup-cards{grid-template-columns:minmax(0,1fr)}.fuel-table th,.fuel-table td{padding:.45rem;font-size:.72rem}}@media(max-width:900px){.comparison-visuals{grid-template-columns:minmax(0,1fr)}.comparison-graph-canvas{height:320px}.comparison-panel select,.comparison-panel input[type=number]{font-size:16px}}@media(max-width:450px){.comparison-settings .comparison-bike-panels{grid-template-columns:minmax(0,1fr)}.comparison-controls{gap:.5rem}.comparison-control{font-size:.6rem}.comparison-readouts{gap:.5rem}.comparison-bike,.comparison-readout{padding:.7rem}.comparison-readout dl{grid-template-columns:1fr;gap:.45rem}.comparison-graph-canvas{height:280px}.comparison-view-controls button{flex:1 0 27%;padding:.6rem .4rem;font-size:.62rem}}@media(max-width:1100px){.ecosystem-budget-buttons{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:800px){.ecosystem-panel{grid-template-columns:minmax(0,1fr)}[data-ecosystem-company-detail],.ecosystem-budget{grid-column:1}.ecosystem-controls select{font-size:16px}.ecosystem-budget-buttons{grid-template-columns:repeat(3,minmax(0,1fr))}.dtc-controls{grid-template-columns:1fr 1fr}.dtc-controls label:first-child{grid-column:1 / -1}.dtc-controls input,.dtc-controls select{font-size:16px}.dtc-guide-cards{grid-template-columns:1fr 1fr}.dtc-reading{grid-template-columns:1fr;gap:1rem}.dtc-results{max-height:300px}.dtc-result{padding:.75rem}.dtc-detail{padding:1rem}}@media(max-width:450px){.lesson-views{grid-template-columns:1fr 1fr;gap:.35rem}.lesson-views button{padding:.6rem .35rem;font-size:.62rem}.ecosystem-controls,.ecosystem-budget-breakdown,.ecosystem-cost-notes dl,.ecosystem-price-examples,.ecosystem-drag-cards{grid-template-columns:minmax(0,1fr)}.ecosystem-company,.ecosystem-budget-path{padding:.85rem}.ecosystem-budget-button{padding:.6rem .45rem}.ecosystem-budget-button span{font-size:.62rem}.ecosystem-concept-flow{gap:.75rem}.ecosystem-concept-flow li{padding:.6rem .4rem}.ecosystem-concept-flow strong{font-size:.76rem}.ecosystem-concept-flow i{right:-.65rem;font-size:.8rem}.ecosystem-concept-checks{grid-template-columns:minmax(0,1fr)}.dtc-controls,.dtc-guide-cards{grid-template-columns:1fr}}.lesson-filters>summary,.lesson-show-graphic{display:none}.lesson-controls label{display:grid;gap:.4rem;color:var(--muted);font:.65rem/1.5 var(--mono);min-width:0}.lesson-controls select,.lesson-controls input{width:100%;min-width:0;min-height:44px;border:1px solid var(--line);padding:.7rem;background:#151516;color:var(--bone);font:.8rem/1.5 system-ui,sans-serif;border-radius:0}.lesson-controls select:disabled{opacity:.7}.lesson-presets{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem}.lesson-presets button{min-height:44px;padding:.6rem .8rem;border:1px solid var(--line);background:var(--surface);font:.65rem/1.3 var(--mono);color:var(--bone);cursor:pointer}.lesson-presets button:hover{border-color:var(--orange)}.lesson-era-note{margin-top:1rem;color:var(--muted);font:.8rem/1.6 system-ui,sans-serif;max-width:70rem}.lesson-selection-status{font:.67rem/1.5 var(--mono);color:var(--steel);margin-top:.65rem;min-height:1.5em}.lesson-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:2rem;margin-top:1.5rem}.lesson-topics{display:flex;flex-direction:column;align-self:start;gap:.65rem}.lesson-topics button{padding:1rem;min-height:60px;border:1px solid var(--line);background:var(--surface);color:var(--bone);text-align:left;font:500 1rem/1.4 var(--display);cursor:pointer}.lesson-topics button span{display:block;font:.57rem/1.5 var(--mono);color:var(--muted);margin-bottom:.6rem}.lesson-topics button[aria-pressed=true]{border-color:var(--orange);background:#f265220b}.lesson-topics button[aria-pressed=true] span{color:var(--orange)}.lesson-reading{min-width:0}.lesson-stages{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.4rem;margin-bottom:1rem}.lesson-stages button{min-height:44px;padding:.6rem .3rem;border:1px solid var(--line);background:var(--surface);color:var(--muted);font:.65rem/1.3 var(--mono);cursor:pointer}.lesson-stages button[aria-pressed=true]{color:var(--bone);background:#f2652215;border-color:var(--orange)}.lesson-year-context{border-left:3px solid var(--orange);padding:.7rem 1rem;background:#151516}.lesson-year-context[data-year-tone=revised]{border-color:#8cbdda}.lesson-year-context[data-year-tone=unknown]{border-color:var(--steel)}.lesson-year-context>span{display:block;font:.65rem/1.5 var(--mono);color:var(--muted)}.lesson-year-context h3{margin:.35rem 0;font:500 1.05rem/1.3 var(--display)}.lesson-year-context p{font:.8rem/1.6 system-ui,sans-serif;color:var(--muted)}.lesson-detail-heading{padding:1.4rem 0}.lesson-detail-heading>p:first-child{font:.6rem/1.5 var(--mono);color:var(--orange)}.lesson-detail-heading h3{font:500 clamp(1.7rem,2.8vw,2.5rem)/1.15 var(--display);margin:.5rem 0}.lesson-detail-heading p{font:.8rem/1.6 system-ui,sans-serif;color:var(--muted)}.lesson-explanation{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1.5rem;align-items:start}.lesson-graphic{min-width:0;padding:.65rem;border:1px solid var(--line);background:#101011}.lesson-graphic svg{display:block;width:100%;height:auto;aspect-ratio:400 / 260}.lesson-graphic figcaption{margin-top:.8rem;padding:0 .3rem;color:var(--muted);font:.8rem/1.65 system-ui,sans-serif}.lesson-graphic figcaption strong{color:var(--bone)}.lesson-analogy{padding:.7rem .3rem .3rem;color:var(--bone);font:.78rem/1.7 system-ui,sans-serif}.lesson-copy article+article{margin-top:1rem}.lesson-copy h4,.lesson-history h4{font:.65rem/1.5 var(--mono);color:var(--bone);margin-bottom:.5rem}.lesson-copy p,.lesson-copy ul{color:var(--muted);font:.85rem/1.75 system-ui,sans-serif}.lesson-copy ul{padding-left:1.1rem}.lesson-copy li+li{margin-top:.5rem}.lesson-history{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--line)}.lesson-history ol{list-style:none;padding:0;display:grid;gap:.6rem;grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.lesson-history li{padding:.8rem;border:1px solid var(--line)}.lesson-history li>span{display:block;color:var(--muted);font:.57rem/1.5 var(--mono)}.lesson-history li>strong{display:block;color:var(--bone);font:500 1rem/1.4 var(--display);margin-top:.5rem}.lesson-history li>p{font:.75rem/1.7 system-ui,sans-serif;color:var(--muted);margin-top:.4rem}.lesson-history .lesson-milestone-past{border-top:2px solid var(--orange)}.lesson-caveat,.lesson-footer{color:var(--muted);font:.78rem/1.75 system-ui,sans-serif;margin-top:1.5rem}.lesson-sources{margin-top:1.3rem;border-block:1px solid var(--line)}.lesson-sources summary{min-height:44px;padding:.8rem 0;color:var(--bone);font:.68rem/1.5 var(--mono);cursor:pointer}.lesson-sources ul{list-style:none;padding:0 0 .8rem}.lesson-sources li+li{margin-top:1rem}.lesson-sources a{display:inline-block;color:var(--orange);font:.8rem/1.6 system-ui,sans-serif;overflow-wrap:anywhere}.lesson-sources li>span{display:block;font:.58rem/1.5 var(--mono);color:var(--steel)}.lesson-sources p{margin-top:.4rem;color:var(--muted);font:.75rem/1.65 system-ui,sans-serif}.lesson-sources>p{padding-bottom:.9rem}@media(max-width:1100px){.lesson-layout{grid-template-columns:190px minmax(0,1fr);gap:1rem}.lesson-explanation{grid-template-columns:1fr}.lesson-graphic{width:min(100%,600px)}}@media(max-width:700px){.lesson-header{min-height:86px;padding:.8rem 1rem;gap:.8rem}.lesson-header h2{font-size:1.15rem}.lesson-header p{font-size:.5rem}.lesson-header button{padding:.6rem}.lesson-scroll{padding:1rem 1rem 2rem}.lesson-filters>summary{display:flex;justify-content:space-between;align-items:center;gap:.7rem;min-height:56px;padding:.7rem;border:1px solid var(--line);background:var(--surface);font:.7rem/1.5 var(--mono);cursor:pointer}.lesson-filters>summary span:last-child{flex:0 0 94px;color:var(--orange);font-size:.6rem}.lesson-filters[open]>summary{margin-bottom:.8rem}.lesson-show-graphic{display:block;width:100%;min-height:44px;margin-top:.8rem;padding:.6rem;border:1px solid var(--orange);background:var(--surface);color:var(--bone);font:.7rem/1.4 var(--mono);cursor:pointer}.lesson-controls{grid-template-columns:minmax(0,1fr) 100px;gap:.6rem}.lesson-controls label:last-child{grid-column:1 / -1}.lesson-controls select,.lesson-controls input{font-size:16px}.lesson-presets{gap:.4rem}.lesson-presets button{flex:1 1 100px;font-size:.59rem}.lesson-layout{grid-template-columns:1fr;margin-top:1rem}.lesson-topics{flex-direction:row;flex-wrap:wrap}.lesson-topics button{flex:1 1 140px;padding:.7rem;font-size:.95rem}.lesson-topics button span{font-size:.52rem;margin-bottom:.4rem}.lesson-stages button{font-size:.6rem}.lesson-selection-status{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.lesson-explanation{gap:1rem}.lesson-detail-heading h3{font-size:1.7rem}.lesson-graphic{padding:.35rem}.lesson-graphic svg text{font-size:14px}.lesson-history ol{grid-template-columns:1fr}}@media(max-height:850px){.era-copy:has(.lesson-entry){position:relative;top:auto}}.sound{min-height:135svh;padding-top:9rem}.sound .section-heading{max-width:56%}.sound-copy{max-width:44%;margin-top:2.5rem}.sound-angle{font:400 clamp(6rem,12vw,12rem)/1 var(--display);letter-spacing:-.06em}.sound-angle span{color:var(--orange)}.sound-copy>p:not(.sound-angle):not(.heritage-quote):not(.sound-note){margin:1.2rem 0;color:var(--muted);max-width:24rem}.sound-copy .heritage-quote{margin:1rem 0 2rem}.rev-button{display:flex;align-items:center;gap:2.5rem;padding:1rem 1.4rem;background:var(--orange);border:1px solid var(--orange);color:var(--asphalt);font:500 .73rem/1.2 var(--mono);text-transform:uppercase;letter-spacing:.06em;transition:background .2s,color .2s}.rev-button:hover{background:var(--bone);border-color:var(--bone)}.rev-button:focus-visible{outline-color:var(--bone)}.sound-note{font:.6rem/1.7 var(--mono);color:var(--muted);margin-top:1rem}.rhythm{position:relative;z-index:4;margin-top:5rem;background:#0a0a0bea;border-top:1px solid var(--line);padding-top:1rem}.rhythm canvas{display:block;width:100%;height:130px}.rhythm figcaption{font:.63rem/1.5 var(--mono);color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.rhythm-legend{display:flex;justify-content:flex-end;gap:1.5rem;font:.61rem/1.5 var(--mono);margin-top:-.95rem}.rhythm-legend span{display:flex;align-items:center;gap:.5rem}.rhythm-legend i{background:var(--orange);width:5px;height:5px;border-radius:50%}.rhythm-legend span:nth-child(2) i{background:var(--bone)}.editorial{background:#0a0a0bf5;z-index:4;border-top:1px solid #f5f2ea12}.editorial .section-heading{margin-bottom:5rem}.family-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}.family-card{border-top:1px solid var(--line);padding:1.9rem 1.6rem 3rem 0;min-height:20rem}.family-card:nth-child(4n+2),.family-card:nth-child(4n+3),.family-card:nth-child(4n+4){padding-left:1.6rem;border-left:1px solid var(--line)}.family-card h3{font-size:clamp(1.6rem,2.6vw,3rem);margin:2.4rem 0 .7rem}.item-index,.spec-label{font:.62rem/1.5 var(--mono);color:var(--muted);letter-spacing:.05em}.family-card .spec-label{color:var(--orange);margin-bottom:.9rem}.family-card>p:last-child{color:var(--muted);font-size:.87rem;max-width:20rem}.bike-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.bike-card{padding:2rem 2.2rem 2.6rem;background:var(--surface);border:1px solid #f5f2ea10;min-height:19rem;transition:border-color .25s}.bike-card:hover{border-color:#f2652266}.bike-card-top{display:flex;justify-content:space-between;gap:1rem}.bike-card-top .spec-label{color:var(--orange);text-align:right}.bike-card h3{font-size:clamp(1.7rem,3vw,3.5rem);margin:2.2rem 0 1rem;max-width:29rem}.bike-card>p{max-width:31rem;color:var(--muted);font-size:.92rem}.culture{padding-top:10rem;padding-bottom:10rem}.culture-list article{display:grid;grid-template-columns:3rem minmax(10rem,.8fr) minmax(15rem,1fr);align-items:start;gap:2rem;padding:2.4rem 0;border-top:1px solid var(--line)}.culture-list .item-index{padding-top:.3rem;color:var(--orange)}.culture-list h3{font-size:clamp(1.7rem,2.7vw,3rem)}.culture-list p{font-size:.94rem;color:var(--muted);max-width:35rem}.numbers{background:#121214f5;padding-top:9rem;padding-bottom:7rem}.stats-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:2.5rem}.stat{padding:2rem 0 2.5rem;border-top:1px solid var(--line)}.stat-value{font:400 clamp(3rem,5.7vw,6.1rem)/1.2 var(--display);letter-spacing:-.03em}.stat:nth-child(3) .stat-value,.stat:first-child .stat-value{color:var(--orange)}.stat-label{font:.66rem/1.8 var(--mono);color:var(--muted);margin-top:.9rem;max-width:18rem}.numbers-note{color:var(--muted);font:.63rem/1.7 var(--mono);margin-top:2rem}.sources{padding-bottom:2.5rem}.sources-archive{margin-bottom:3rem;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.sources-archive summary{cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1.5rem 0;font:.72rem/1.5 var(--mono)}.sources-archive summary svg{color:var(--orange);transition:transform .3s}.sources-archive[open] summary svg{transform:rotate(90deg)}.sources-archive .source-note{margin:1.5rem 0}.source-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8vw;margin:1rem 0 2rem}.source-columns h3{font:.65rem/1.5 var(--mono);letter-spacing:.1em;text-transform:uppercase;margin-bottom:1.5rem}.source-list{list-style:none;padding:0;margin:0}.source-list a{display:flex;justify-content:space-between;gap:1rem;align-items:center;font-size:.85rem;padding:.8rem 0;border-bottom:1px solid var(--line)}.source-list a svg{color:var(--orange);width:1.1rem}.source-list a:hover{color:var(--orange)}.source-list li>p{color:var(--muted);font-size:.7rem;line-height:1.6;margin:.5rem 0 1rem}.source-note{font-size:.73rem;line-height:1.8;color:var(--muted);overflow-wrap:anywhere}.source-note ul{margin:1.2rem 0 0;padding-left:1.1rem}.source-note li+li{margin-top:.6rem}.footer-bottom{display:flex;align-items:flex-start;gap:2.5rem;justify-content:space-between;padding-top:2rem;border-top:1px solid var(--line)}.footer-bottom>div{max-width:32rem}.footer-bottom>div>p:first-child{font:.7rem/1.4 var(--mono)}.footer-bottom .disclaimer{font-size:.71rem;color:var(--muted);margin-top:.8rem}.footer-bottom>a{display:flex;align-items:center;gap:.7rem;font:.67rem/1.5 var(--mono);white-space:nowrap}.footer-bottom>a svg{width:1rem;color:var(--orange)}.footer-bottom .back-top{color:var(--muted)}.reveal-ready [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .85s cubic-bezier(.22,1,.36,1),transform .85s cubic-bezier(.22,1,.36,1)}.reveal-ready [data-reveal].is-visible{opacity:1;transform:translateY(0)}.motion-line{display:inline-block;clip-path:inset(-12% -4% -15%)}.motion-line-ink{display:inline-block}.motion-ready.reveal-ready [data-reveal] .motion-line-ink{transform:translateY(112%);transition:transform 1.5s cubic-bezier(.22,.65,.3,1);transition-delay:var(--line-delay, 0s)}.motion-ready.reveal-ready [data-reveal].is-visible .motion-line-ink{transform:translateY(0)}.motion-number{display:inline-grid;font-variant-numeric:tabular-nums;clip-path:inset(-12% -5% -15%)}.motion-number-space,.motion-digit{grid-area:1 / 1}.motion-number-space{visibility:hidden;pointer-events:none}.motion-digit{display:inline-block}.motion-counting .motion-digit{animation:digit-arrival var(--counter-duration, 2s) cubic-bezier(.22,.65,.3,1) both}@keyframes digit-arrival{0%{opacity:.35;transform:translateY(.28em)}to{opacity:1;transform:translateY(0)}}.motion-year-echo{position:absolute;left:-.03em;top:-.2em;pointer-events:none;z-index:-1;font:400 clamp(5rem,9vw,11rem)/1 var(--display);letter-spacing:-.05em;opacity:.055}.motion-ready .era-copy{isolation:isolate}.motion-ready .hero-heading{transform:translate3d(var(--hero-x, 0px),var(--hero-y, 0px),0)}.motion-ready.reveal-ready .bike-card.is-visible,.motion-ready.reveal-ready .family-card.is-visible{transform:translate3d(var(--magnet-x, 0px),var(--magnet-y, 0px),0) rotate(var(--magnet-tilt, 0deg));transition:opacity .85s cubic-bezier(.22,.65,.3,1),transform .65s cubic-bezier(.22,.65,.3,1),border-color .35s}.motion-ready .chapter-nav a[aria-current] i{transform:scaleY(calc(1 + var(--scroll-force, 0) * .2))}.motion-ready .chapter-nav a i{transition:height .4s,background .4s,transform .45s cubic-bezier(.22,.65,.3,1)}.motion-ready .chapter-nav a[aria-current] b{opacity:1;transition:opacity .7s}.chapter-nav a b .motion-era-label{opacity:1;color:var(--muted);font-size:inherit}.motion-ready .reading-progress span{filter:drop-shadow(0 0 3px #f2652244)}.motion-paused *,.motion-paused *:before,.motion-paused *:after{animation-play-state:paused!important}html.webgl-fallback .hero-heading{max-width:100%}html.webgl-fallback .origin-opening,html.webgl-fallback .sound-copy{max-width:42rem}html:not(.webgl-ready) .era{min-height:auto;padding:4rem 0;border-top:1px solid var(--line)}html:not(.webgl-ready) .era-copy{position:static;width:min(100%,42rem)}html:not(.webgl-ready) .engine-intro{min-height:auto;padding-bottom:5rem}@media(min-width:1500px){.chapter{padding-right:max(var(--gutter),calc((100vw - 1400px)/2));padding-left:max(var(--gutter),calc((100vw - 1400px)/2))}.hero{padding-left:var(--gutter)}.engines{padding-top:0;padding-bottom:0}}@media(max-width:1100px){.chapter-nav{right:.6rem}.family-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.family-card:nth-child(n){border-left:0;padding-left:0;padding-right:1.5rem}.family-card:nth-child(2n){padding-left:1.5rem;border-left:1px solid var(--line)}.source-columns{gap:4vw}.culture-list article{grid-template-columns:2rem .8fr 1fr;gap:1.3rem}}@media(max-width:760px){:root{--gutter: 1.5rem}html{scroll-padding-top:4.5rem}.site-header{height:4.6rem}.text-wordmark{font-size:1rem}.header-actions{gap:1rem}.sound-profile{font-size:.49rem;max-width:12.5rem}.header-actions>a,.chapter-nav{display:none}.chapter{padding:6rem var(--gutter) 5rem}.hero{min-height:110svh;padding-top:7.5rem}.hero-heading{max-width:100%}h1{font-size:clamp(3.4rem,18.2vw,8.5rem)}.hero-year{font-size:2.8rem;margin-top:1rem}.hero-copy{font-size:.71rem;margin-top:1.4rem;max-width:17rem}.hero-origin{margin-top:1.3rem;font-size:.55rem}.hero-bottom{padding-top:42svh;gap:1.3rem;flex-direction:column;align-items:flex-start}.scroll-cue{font-size:.59rem}.interaction-hint{font-size:.56rem}.engine-control{width:80vw;height:43svh;left:10vw;right:auto;top:50svh}html[data-scene=origin] .engine-control{visibility:hidden;pointer-events:none}html[data-scene=engines] .engine-control{top:49svh;height:42svh}html[data-scene=sound] .engine-control{top:48svh}h2{font-size:clamp(3rem,12vw,5rem)}.chapter-index{font-size:.6rem;margin-bottom:1.5rem}.origin-opening{max-width:100%}.origin{background:#0a0a0bf5;z-index:4}.origin-opening .heritage-quote{margin:2rem 0 3rem}.origin-beats{gap:1.5rem}.history-archive{margin-top:3rem}.history-archive summary{font-size:1.1rem;gap:.8rem}.history-archive summary span{font-size:.54rem}.history-list li{grid-template-columns:5rem 1fr;gap:.7rem}.history-list p{font-size:.83rem}.history-list h3{font-size:.72rem}.engines{padding:0 var(--gutter)}.engine-intro{padding-top:6rem;min-height:100svh}.engine-intro .section-heading{max-width:100%}.intro-copy{font-size:.83rem;margin-top:1.5rem}.era{min-height:130svh;padding-bottom:28svh}.era-copy{top:12svh;width:100%;padding:1.5rem 0 2rem;background:linear-gradient(#0a0a0beb 80%,#0a0a0b00)}.era-years{font-size:.78rem;margin:1.6rem 0 1rem}.era h3{font-size:clamp(2rem,9vw,3.6rem);max-width:23rem}.era-signature{font-size:.82rem;margin-top:.9rem;max-width:22rem}.era-line{margin-top:1.5rem;width:2rem}.sound{min-height:160svh;padding-top:6rem}.sound .section-heading{max-width:100%}.sound-copy{max-width:100%;margin-top:2rem}.sound-angle{font-size:6rem}.sound-copy .heritage-quote{font-size:1.8rem}.sound-copy>p:not(.sound-angle):not(.heritage-quote):not(.sound-note){font-size:.85rem;max-width:15rem}.rev-button{position:relative;z-index:5;font-size:.65rem;padding:.9rem 1.1rem}.sound-note{position:relative;z-index:5}.rhythm{margin-top:40svh}.rhythm canvas{height:100px}.rhythm-legend{justify-content:flex-start;margin-top:1rem;gap:1rem;font-size:.57rem}.rhythm figcaption{font-size:.56rem}.editorial .section-heading{margin-bottom:3rem}.family-grid,.bike-grid{grid-template-columns:1fr}.family-card:nth-child(n){padding:1.5rem 0 2rem;border-left:0;min-height:auto}.family-card h3{margin-top:1.4rem;font-size:2.2rem}.family-card>p:last-child{max-width:100%}.bike-card{padding:1.6rem;min-height:auto}.bike-card h3{font-size:2rem;margin-top:1.8rem}.bike-card>p{font-size:.86rem}.culture-list article{grid-template-columns:1.7rem 1fr;gap:.6rem;padding:1.8rem 0}.culture-list p{grid-column:2;margin-top:.7rem;font-size:.86rem}.culture-list h3{font-size:2rem}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 1rem}.stat{padding:1.5rem 0 2rem}.stat-value{font-size:clamp(2.4rem,10.5vw,4rem)}.stat-label{font-size:.57rem}.source-columns{grid-template-columns:1fr;gap:3rem;margin-bottom:3rem}.footer-bottom{flex-wrap:wrap;gap:2rem}.footer-bottom>div{flex-basis:100%}.footer-bottom>a{font-size:.65rem}.footer-bottom .back-top{margin-left:auto}html.webgl-fallback .hero-bottom{padding-top:3rem}html.webgl-fallback .hero{min-height:100svh}html.webgl-fallback .sound{min-height:auto}html.webgl-fallback .rhythm{margin-top:3rem}}@media(max-height:700px){.era-copy{position:relative;top:auto}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.reveal-ready [data-reveal]{opacity:1;transform:none}.era{min-height:auto;padding:4rem 0}.era-copy{position:static}.engine-intro{min-height:auto;padding-bottom:5rem}.motion-line-ink,.motion-digit,.hero-heading,.bike-card,.family-card{transform:none!important}.motion-year-echo{display:none}.motion-line,.motion-number{clip-path:none}.chapter-nav a i{transform:none!important}}@media print{#gl,.site-header,.chapter-nav,.engine-control,.reading-progress,.hero-bottom,.rev-button,.rhythm,.noscript-note{display:none!important}html,body{background:#fff;color:#000}.chapter{padding:2rem 0;background:none;min-height:auto}.era{min-height:auto;padding:2rem 0}.era-copy{position:static;width:100%}.reveal-ready [data-reveal]{opacity:1;transform:none}.origin-opening,.sound-copy{max-width:100%}.history-archive{background:none}.history-archive::details-content{content-visibility:visible}.sources-archive::details-content{content-visibility:visible}.motion-year-echo{display:none}.motion-line-ink,.motion-digit,.hero-heading,.bike-card,.family-card{transform:none!important;animation:none!important}.family-grid,.bike-grid,.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.demo-bar{position:fixed;inset:0 0 auto;z-index:100;height:36px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 14px;border-bottom:1px solid #273247;background:#080c16;color:#b9c6ea;font:12px/1.2 system-ui,sans-serif}.demo-bar a{color:#c1f5ff;text-decoration:none;padding-block:7px}.demo-bar a:focus-visible{outline:2px solid #22e6ff;outline-offset:2px}body{padding-top:36px}.site-header{top:36px}html{scroll-padding-top:calc(6rem + 36px)}.skip-link:focus{top:calc(1rem + 36px)}