@import url('/fonts/fonts.css');
@scope (.m001-library) {
:root{color-scheme:dark;--bg:#0c1115;--panel:#131c22;--panel2:#18232b;--line:#29353e;--text:#edf2f5;--muted:#a1afb9;--steel:#8fbbd0;--orange:#ff8b50;--font:'DM Sans',system-ui,sans-serif;--head:'Manrope',system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,summary,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit;background:none;border:0}button:disabled{cursor:wait;opacity:.6}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,select:focus-visible,#stage:focus-visible{outline:2px solid var(--orange);outline-offset:5px}button:hover,a:hover{color:var(--orange)}[hidden]{display:none!important}svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.skip{position:fixed;top:-80px;left:20px;background:var(--orange);color:#111;padding:12px;z-index:100}.skip:focus{top:10px}.header{height:86px;max-width:1320px;margin:auto;padding:0 48px;display:flex;align-items:center;gap:60px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:16px;font-size:14px;font-family:var(--head);letter-spacing:2px;font-weight:800}.brand img{width:59px;height:auto}.header nav{display:flex;height:100%;gap:34px;align-items:center}.header nav a{font-size:14px;color:var(--muted);height:100%;display:flex;align-items:center;position:relative}.header nav .current{color:var(--text)}.header nav .current:after{content:'';height:2px;background:var(--orange);bottom:0;left:0;right:0;position:absolute}.icon-button{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;font-size:19px}.icon-button:hover{background:#ffffff0a}.search-trigger{margin-left:auto;width:auto;gap:10px;font-size:14px;color:var(--muted)}kbd{font:12px var(--font);border:1px solid var(--line);border-radius:4px;padding:0 6px}.page{max-width:1224px;margin:auto}.breadcrumbs{display:flex;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted);padding:32px 0}.breadcrumbs>span:last-child{color:var(--text)}.intro{display:grid;grid-template-columns:1fr 1.12fr;gap:64px;align-items:center;padding:3px 0 64px}.eyebrow{font-size:12px;font-weight:650;letter-spacing:1.65px;color:var(--steel);margin:0 0 14px;line-height:1.4}h1,h2,h3,h4{font-family:var(--head);line-height:1.2;margin:0;font-weight:750;letter-spacing:-.035em}h1{font-size:clamp(48px,5.6vw,80px);line-height:1.02;margin:22px 0 24px;letter-spacing:-.065em}h1 span{display:block}h2{font-size:32px}h3{font-size:21px}h4{font-size:17px}.lead{font-size:23px;line-height:1.5;margin:0 0 20px;color:#dae3e8;letter-spacing:-.4px}.intro-text{color:var(--muted);max-width:420px;margin-bottom:26px}.term{color:#c4dce8;border-bottom:1px dashed #6c8d9e;text-decoration:none}.term:hover{border-bottom-color:var(--orange)}.quick-note{display:flex;gap:18px;padding:17px 0 20px;border-top:1px solid var(--line);max-width:420px}.quick-note p{font-size:14px;color:var(--muted);margin:0}.quick-note strong{display:block;color:#dce5eb;font-weight:550;margin-bottom:3px}.note-symbol{color:var(--orange);font-size:30px;line-height:1.4}.text-link{display:inline-flex;align-items:center;gap:16px;color:var(--orange);font-size:14px;font-weight:550;padding:6px 0;text-align:left}.text-link span{font-size:20px}.model-card{position:relative;background:radial-gradient(ellipse at 45% 38%,#253944 0%,#17232c 44%,#11191f 83%);border:1px solid #354550;border-radius:18px;min-width:0;height:584px;overflow:hidden;isolation:isolate}.model-top{position:absolute;top:16px;left:23px;right:15px;display:flex;align-items:center;justify-content:space-between;z-index:2}.model-top .eyebrow{margin:0;font-size:11px;letter-spacing:1.8px}.model-top .icon-button{border:1px solid #52636e77}.model-card #stage{position:absolute;inset:65px 8px 100px;touch-action:pan-y}.model-card canvas{display:block;width:100%;height:100%;touch-action:none}.model-loading{position:absolute;left:0;right:0;top:40%;text-align:center;color:var(--muted)}.model-side-tools{position:absolute;right:16px;top:75px;display:flex;flex-direction:column;gap:8px}.model-side-tools button{background:#0c141aaa;border:1px solid #46596288}.model-side-tools button[aria-pressed=true]{color:var(--orange)}.model-hint{position:absolute;bottom:77px;left:24px;right:24px;text-align:center;font-size:12px;color:var(--muted)}.model-modes{position:absolute;bottom:17px;left:18px;right:18px;display:flex;background:#0b1218b0;border:1px solid #3b4a5388;padding:4px;border-radius:11px;gap:3px}.model-modes button{flex:1;border-radius:7px;font-size:14px;padding:10px 4px;color:#afbec7;white-space:nowrap}.model-modes button.active{background:#e9eef1;color:#142029;font-weight:700;box-shadow:0 2px 6px #0003}.model-card:has(.extra-control:not([hidden])){height:630px}.model-card:has(.extra-control:not([hidden])) #stage{bottom:148px}.model-card:has(.extra-control:not([hidden])) .model-modes{bottom:65px}.model-card:has(.extra-control:not([hidden])) .model-hint{bottom:125px}.extra-control{position:absolute;bottom:15px;left:24px;right:24px;display:flex;gap:16px;align-items:center;font-size:13px}.extra-control input{width:100%;min-width:50px;accent-color:var(--orange)}.extra-control label{white-space:nowrap}.extra-control button,.extra-control select{font-size:13px;background:#23323c;border:1px solid #40505d;padding:5px 13px;border-radius:7px;color:var(--text)}.extra-control label[for=tempo]{margin-left:auto}.model-selected{position:absolute;bottom:147px;left:22px;right:65px;font-size:13px;pointer-events:none;color:var(--orange)}#model-error{position:absolute;inset:120px 35px;z-index:5;background:#17232c;padding:20px;border-radius:10px}#model-error button{padding:8px;background:var(--orange);color:#111;border-radius:6px}.model-card.expanded{position:fixed;inset:20px;z-index:90;width:auto;height:auto!important;border-radius:16px;background:radial-gradient(ellipse,#263a47,#10171d 80%)}body.model-open{overflow:hidden}.reading-layout{display:grid;grid-template-columns:214px minmax(0,1fr);gap:64px;border-top:1px solid var(--line)}.chapter-nav{align-self:start;position:sticky;top:35px;padding-top:46px}.chapter-nav nav{display:flex;flex-direction:column;gap:5px}.chapter-nav a{display:flex;gap:16px;align-items:center;color:var(--muted);font-size:14px;border-left:1px solid #33414b;padding:9px 0 9px 16px;line-height:1.4}.chapter-nav a span{font-size:11px;color:#70838e;letter-spacing:.4px}.chapter-nav a.active{color:var(--orange);border-left:2px solid var(--orange);padding-left:15px}.chapter-nav .eyebrow{font-size:11px;margin-bottom:23px;color:#889ca9}.nav-note{margin:28px 0 0;max-width:175px;font-size:12px;color:#8196a3;line-height:1.7}.chapter{padding:48px 0;border-bottom:1px solid var(--line)}.chapter:first-child{padding-top:44px}.section-heading{display:flex;align-items:flex-start;gap:20px;margin-bottom:22px}.section-number{font-size:12px;color:var(--orange);padding-top:3px;line-height:1.4;letter-spacing:.5px}.section-heading .eyebrow{margin-bottom:11px;font-size:11px}.chapter>p{color:var(--muted);max-width:660px;margin:20px 0 27px}.location-figure{margin:30px 0 26px}.car-map{position:relative;background:#111a20;border:1px solid var(--line);border-radius:14px;overflow:hidden}.car-map img{display:block;width:100%;height:auto;padding:25px 10px 18px}.hotspot{position:absolute;left:19%;top:50%;z-index:2}.pulse{display:block;width:13px;height:13px;background:var(--orange);border:3px solid #fff;border-radius:50%;position:relative;box-shadow:0 0 0 5px #ff884933}.pulse:after{content:'';position:absolute;inset:-11px;border:1px solid var(--orange);border-radius:50%;animation:pulse 2.6s infinite}.hotspot-label{position:absolute;bottom:34px;left:-6px;white-space:nowrap;color:#ffe1d0;background:#32271f;border:1px solid #ae673c;border-radius:5px;padding:5px 10px;font-size:12px}.hotspot-label:after{content:'';position:absolute;width:1px;height:21px;background:var(--orange);bottom:-22px;left:12px}.car-front,.car-rear{position:absolute;bottom:13px;font-size:9px;letter-spacing:2px;color:#92a4ae}.car-front{left:21px}.car-rear{right:21px}figcaption,.small-note{font-size:13px;color:#94a5b0;line-height:1.6;margin-top:11px}.location-chain{display:flex;flex-wrap:wrap;gap:12px;font-size:13px;align-items:center;margin-bottom:30px}.location-chain>span,.location-chain a{color:#bdcbd3}.location-chain i{font-style:normal;color:#63808f}.location-chain strong{color:var(--orange);font-weight:500}.two-facts{display:grid;grid-template-columns:1fr 1fr;gap:40px}.mini-label{font-size:11px;letter-spacing:1.2px;color:var(--steel);display:block;margin-bottom:11px}.two-facts h3{font-size:18px}.two-facts p{font-size:14px;color:var(--muted);margin-bottom:0}.force-flow{display:flex;gap:8px;align-items:center;margin:30px 0 40px}.force-flow>a,.force-flow>button{flex:1;text-align:left;min-width:0;align-self:stretch;border-top:1px solid #49606e;padding:15px 0 0}.force-flow span{display:block;color:var(--steel);font-size:11px;margin-bottom:6px}.force-flow strong{display:block;font-size:15px}.force-flow small{font-size:12px;line-height:1.5;color:var(--muted);display:block;margin-top:5px}.force-flow i{color:var(--orange);font-style:normal;margin-top:10px}.cycle{border:1px solid #344651;border-radius:14px;background:linear-gradient(130deg,#1b2a34,#121b22);padding:26px}.cycle-title{display:flex;align-items:center;justify-content:space-between;gap:20px}.cycle-title h3{font-size:20px}.cycle-title .eyebrow{font-size:10px;margin-bottom:8px}.cycle-title>span{font-family:var(--head);color:#6e8999;font-size:26px;letter-spacing:-1px}.cycle-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:24px 0}.cycle-tabs button{font-size:12px;padding:12px 8px;border-bottom:2px solid #354a58;text-align:left}.cycle-tabs button span{display:block;color:var(--muted);font-size:10px;margin-bottom:8px}.cycle-tabs button b{display:none}.cycle-tabs button[aria-selected=true]{color:var(--orange);border-color:var(--orange);background:#ffffff04}.cycle-panel{display:flex;gap:25px;min-height:185px}.cycle-arrow{font-size:64px;color:var(--orange);line-height:1.2;min-width:45px;font-family:system-ui;font-weight:200}.cycle-panel h4{font-size:20px;margin:4px 0 10px}.cycle-panel p{margin:0;color:#b2c0c9;font-size:15px}.cycle-panel .text-link{font-size:12px;margin-top:10px}.cycle .small-note{font-size:11px;border-top:1px solid #344651;padding-top:15px;margin-bottom:0}.subheading{margin:37px 0 22px;font-size:23px}.duty-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.duty-grid p{font-size:14px;color:var(--muted);margin:10px 0 0}.duty-icon{color:var(--steel);font-size:30px;display:block;margin-bottom:12px;line-height:1.2}.parts-layout{display:grid;grid-template-columns:1fr 1.28fr;border:1px solid var(--line);border-radius:13px;overflow:hidden}.part-list{background:#11191f;padding:10px;display:flex;flex-direction:column}.part-list button{text-align:left;font-size:13px;color:var(--muted);padding:13px 14px;border-radius:7px;display:flex;justify-content:space-between;align-items:center;gap:10px}.part-list button[aria-pressed=true]{color:var(--text);background:#263641}.part-list button[aria-pressed=true]:after{content:'↗';color:var(--orange)}.part-detail{padding:27px;background:#17232b}.part-detail h3{margin:10px 0 18px;font-size:23px}.part-detail p{font-size:14px;color:#b3c2cc}.part-detail .material{border-top:1px solid #354550;padding-top:18px;margin-top:20px}.part-detail .material strong{font-size:13px;font-weight:500;display:block;color:#d8e1e7}.part-detail .mini-label{font-size:10px}.variant-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:26px}.variant-grid article{border-top:2px solid #698493;padding-top:20px}.variant-grid h3{font-size:19px}.variant-grid p{font-size:14px;color:var(--muted)}details{border-top:1px solid var(--line)}details:last-of-type{border-bottom:1px solid var(--line)}summary{cursor:pointer;list-style:none;padding:19px 36px 19px 0;font-size:15px;font-weight:500;position:relative;line-height:1.6}summary::-webkit-details-marker{display:none}summary:after{content:'+';position:absolute;right:5px;top:16px;font-size:23px;color:var(--steel);font-weight:400}details[open] summary:after{content:'−';color:var(--orange)}details[open] summary{color:#f5b18b}.detail-content{padding:0 28px 20px 0;color:var(--muted);font-size:15px}.detail-content p:first-child{margin-top:0}.detail-content p:last-child{margin-bottom:0}.detail-content strong{color:#d9e3e9;font-weight:600}.cause-chain{display:flex;align-items:center;gap:16px;background:#231d19;border:1px solid #4c372a;padding:20px;border-radius:10px;margin-bottom:27px;font-size:13px;color:#e1b49b}.cause-chain i{font-style:normal;color:var(--orange)}.note-line{border-left:2px solid var(--orange);padding-left:20px;margin-top:28px}.note-line strong{font-size:15px}.note-line p{font-size:14px;color:var(--muted);margin:7px 0 0}.definition-list{margin:0}.definition-list>div{padding:14px 0;border-bottom:1px solid #283a46}.definition-list dt{font-weight:600;color:#dae5eb}.definition-list dd{margin:6px 0 0}.lexicon-callout{display:flex;align-items:center;justify-content:space-between;gap:20px;background:#192b36;padding:27px;border:1px solid #304b5b;border-radius:12px;margin-top:33px}.lexicon-callout .eyebrow{font-size:10px}.lexicon-callout h3{font-size:24px}.lexicon-callout p{font-size:14px;color:var(--muted);margin:10px 0 0}.lexicon-callout>span{font-size:34px;color:var(--steel)}.sources h2{font-size:27px}.sources>p{font-size:14px}.sources ol{padding-left:22px;font-size:14px}.sources li{padding:10px 0}.sources li::marker{color:var(--orange);font-size:11px}.sources li span{display:block;color:var(--muted);font-size:12px;margin-top:4px}.sources li a{border-bottom:1px solid #4c6574}.model-limits{margin-top:25px;border-top:1px solid var(--line);padding-top:25px;font-size:14px}.model-limits p{color:var(--muted);font-size:13px}.source-date{font-size:11px!important;margin-bottom:0!important;color:#8295a1!important}.footer{display:flex;align-items:center;justify-content:space-between;gap:25px;flex-wrap:wrap;padding:40px 0;color:#91a4b0;font-size:12px}.footer .brand{font-size:12px;color:#d8e2e9}.mobile-nav{display:none}.search-dialog{width:min(640px,calc(100% - 32px));max-height:80dvh;border:1px solid #4a606e;border-radius:15px;color:var(--text);background:#131e26;padding:26px;overflow:auto}.search-dialog::backdrop{background:#03090de0;backdrop-filter:blur(7px)}.dialog-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.dialog-top h2{font-size:23px}.search-field{width:100%;padding:14px;border:1px solid #4d6675;border-radius:8px;background:#0c151d;color:var(--text);font-size:16px}.search-results{display:flex;flex-direction:column;margin-top:18px}.search-results a{padding:14px 6px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px}.search-results small{color:var(--muted);font-size:12px}.search-results p{color:var(--muted)}.term-page{max-width:790px;min-height:65vh;padding:35px 0 65px}.term-page h1{font-size:54px;line-height:1.15;overflow-wrap:anywhere;margin:25px 0}.term-page .lead{font-size:25px}.term-page .definition{font-size:19px;color:#c8d6df;border-left:3px solid var(--orange);padding:4px 0 4px 24px;margin:30px 0}.term-page h2{font-size:25px;margin:35px 0 15px}.term-page p{color:var(--muted)}.term-example{background:#192832;border:1px solid #304551;border-radius:12px;padding:25px;margin:30px 0}.term-example h2{margin:0 0 10px;font-size:20px}.related-terms{display:flex;gap:10px;flex-wrap:wrap}.related-terms a{border:1px solid #385362;border-radius:7px;padding:8px 12px;font-size:14px}.back-link{font-size:14px;color:var(--steel);display:inline-block;padding:8px 0}.glossary-list{display:grid;grid-template-columns:1fr 1fr;gap:0 35px;margin-top:28px}.glossary-list a{border-bottom:1px solid var(--line);padding:22px 0}.glossary-list h2{font-size:19px;margin:0 0 8px}.glossary-list p{font-size:13px;margin:0}.glossary-empty{padding:20px 0;color:var(--muted)}@keyframes pulse{0%{transform:scale(.7);opacity:.9}90%,100%{transform:scale(1.5);opacity:0}}
@media(min-width:1600px){.header{max-width:1380px}.page{max-width:1284px}.intro{gap:100px}}
@media(max-width:1300px){.header{padding:0 32px}.page{margin:0 48px}.intro{gap:40px}.reading-layout{gap:40px;grid-template-columns:190px minmax(0,1fr)}}
@media(max-width:1000px){.header{gap:40px}.page{margin:0 32px}.reading-layout{display:block}.chapter-nav{display:none}.intro{gap:30px;grid-template-columns:1fr 1fr}.intro h1{font-size:60px}.intro-copy .lead{font-size:21px}.model-card{height:550px}.intro-text{font-size:15px}.quick-note{padding-top:15px}.quick-note p{font-size:13px}.article-body{max-width:790px;margin:auto}.chapter{padding:45px 0}}
@media(max-width:680px){html{scroll-padding-top:25px}.header{height:67px;padding:0 21px;gap:15px}.brand{gap:11px;font-size:11px;letter-spacing:1.5px}.brand img{width:44px}.header nav{display:none}.search-trigger{width:40px}.search-trigger span,.search-trigger kbd{display:none}.page{margin:0 22px}.breadcrumbs{font-size:11px;gap:9px;padding:24px 0 18px;line-height:1.5}.intro{display:flex;flex-direction:column;align-items:stretch;gap:25px;padding:6px 0 35px}.intro-copy .eyebrow{font-size:10px;letter-spacing:1.6px;margin-bottom:14px}.intro h1{font-size:clamp(38px,10.5vw,65px);margin:0 0 15px;letter-spacing:-.055em;line-height:1.13}.intro h1 span{display:inline}.intro-copy .lead{font-size:21px;line-height:1.45;margin:0 0 15px}.lead br{display:none}.intro-text{font-size:16px;line-height:1.65;max-width:none;margin:0 0 20px}.quick-note{display:none}.intro-copy>.text-link{font-size:13px;padding:0}.model-card{height:450px;border-radius:15px}.model-card:has(.extra-control:not([hidden])){height:496px}.model-card #stage{inset:52px 3px 94px}.model-top{top:12px;left:17px;right:11px}.model-top .eyebrow{font-size:10px}.model-top .icon-button{width:35px;height:35px}.model-side-tools{right:11px;top:66px;gap:6px}.model-side-tools .icon-button{width:35px;height:35px}.model-modes{left:12px;right:12px;bottom:12px}.model-modes button{font-size:13px;padding:10px 4px}.model-hint{font-size:10px;left:10px;right:10px;bottom:69px}.model-card:has(.extra-control:not([hidden])) .model-hint{bottom:117px}.model-card:has(.extra-control:not([hidden])) .model-modes{bottom:60px}.model-card.expanded{inset:8px 8px calc(8px + env(safe-area-inset-bottom));border-radius:12px}.model-selected{font-size:12px;bottom:137px;left:18px}.section-heading{gap:15px;margin-bottom:19px}.section-number{font-size:11px}.section-heading 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