:root{color-scheme:dark;--bg:#10191d;--panel:#162126;--line:#2a373b;--text:#ecf2f0;--muted:#9baeb3;--accent:#d9f36e;--dark:#132023;font-family:Inter,Arial,Helvetica,sans-serif;font-size:16px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}button,input,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button{cursor:pointer;color:inherit}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,#viewport:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button{transition:background .16s,color .16s,border-color .16s}button:hover{filter:brightness(1.13)}a{color:inherit;text-decoration:none}[hidden]{display:none!important}.topbar{height:84px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 30px;gap:20px;background:#111b20}.brand{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:800;letter-spacing:1.8px}.brand-mark{display:flex;align-items:center;justify-content:center;background:var(--accent);color:var(--dark);width:44px;height:44px;border-radius:11px;font-size:22px;letter-spacing:-3px;padding-right:3px}.brand-mark span{font-size:34px;font-weight:400;margin:0 2px}.brand small{display:block;color:var(--muted);font-size:10px;letter-spacing:2.2px;font-weight:500;margin-top:6px}.header-meta{font-size:12px;letter-spacing:1.6px;color:var(--muted)}.header-meta span{margin:0 14px;color:#53676d}.quiet-button{background:transparent;border:1px solid var(--line);border-radius:8px;padding:9px 13px;font-size:14px;white-space:nowrap}.key{margin-left:12px;color:var(--accent)}.workspace{display:grid;grid-template-columns:284px minmax(0,1fr);height:calc(100dvh - 84px);min-height:610px}.catalog{background:#131e23;border-right:1px solid var(--line);display:flex;flex-direction:column;overflow:hidden;z-index:10}.catalog-head{padding:30px 24px 20px;display:flex;justify-content:space-between;align-items:start}.eyebrow{font-size:11px;font-weight:650;letter-spacing:1.7px;color:var(--muted)}h1{font-size:31px;line-height:1.16;letter-spacing:-1.4px;font-weight:600;margin:13px 0 0}h1 span{display:block;color:#8a9ea5}h2{font-weight:550;letter-spacing:-.65px;line-height:1.18}.model-meta{display:flex;gap:9px;padding:0 24px 23px;align-items:center;font-size:12px;color:var(--muted)}.model-meta>span:first-child{color:var(--accent);border:1px solid #3a4a35;border-radius:4px;padding:4px 7px;letter-spacing:.7px}.search{display:flex;align-items:center;gap:8px;margin:0 18px 25px;background:#1b292f;border:1px solid var(--line);border-radius:7px;padding:9px 11px;color:var(--muted)}.search>span{font-size:25px;line-height:20px}.search input{background:transparent;border:0;outline:0;color:var(--text);min-width:0;width:100%;font-size:14px;padding:2px}.search input::placeholder{color:#9baeb3}.catalog-label{display:flex;justify-content:space-between;padding:0 20px 12px;font-size:10px;letter-spacing:1.5px;color:var(--muted);align-items:center}.catalog-label button{border:0;background:transparent;color:var(--accent);padding:0;font-size:12px;letter-spacing:0}.part-list{overflow:auto;flex:1;min-height:0;scrollbar-width:thin;scrollbar-color:#3e535d transparent;padding:0 10px 15px}.group{border-bottom:1px solid #243137}.group-head{display:flex;align-items:center;gap:5px}.group-toggle{flex:1;min-width:0;text-align:left;display:flex;gap:9px;align-items:center;background:transparent;border:0;padding:14px 8px;color:#d6e2e2;font-size:14px}.group-toggle .chevron{font-size:15px;color:#8b9da4;width:9px;transform:rotate(0);transition:transform .2s}.group.open .chevron{transform:rotate(90deg)}.group-name{flex:1}.group-dot{width:7px;height:7px;border-radius:2px;background:var(--group-color)}.count{font-size:11px;color:#839aa3;font-variant-numeric:tabular-nums}.eye-button{border:0;background:transparent;display:flex;align-items:center;justify-content:center;color:#829ba6;width:30px;height:34px;flex-shrink:0;border-radius:5px}.eye-button:hover{background:#26353c;color:#d9f36e}.eye-button.off{color:#51646b}.eye-button svg{width:15px;height:15px}.part-items{padding:0 0 8px 12px}.part-row{display:flex;align-items:center;border-radius:6px;margin-bottom:2px}.part-row.selected{background:#2d3b2d}.part-pick{border:0;background:transparent;padding:9px 5px 9px 9px;color:#aabdc4;text-align:left;font-size:13px;line-height:1.4;flex:1;min-width:0}.part-row:hover{background:#202e34}.part-row.selected .part-pick{color:var(--accent)}.part-row.hidden-part .part-pick{text-decoration:line-through;color:#748a93}.empty{font-size:14px;color:var(--muted);padding:20px 12px;line-height:1.6}.catalog-foot{display:flex;gap:10px;align-items:center;padding:17px 18px;border-top:1px solid var(--line);background:#152026}.mini-cube{font-size:24px;color:var(--muted)}.catalog-foot p{font-size:11px;line-height:1.6;margin:0;flex:1;color:#92a9b1}.catalog-foot button{width:22px;height:22px;border:1px solid #58707a;border-radius:50%;background:transparent;color:#a8bbc2;font-family:Georgia,serif;font-style:italic}.stage{position:relative;overflow:hidden;background:#19292f;min-width:0;isolation:isolate}.stage:before{content:'';position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse at 55% 42%,#2f444c 0%,#1c2d34 60%,#17272e 100%);z-index:-1}#viewport{position:absolute;inset:0;touch-action:none}#viewport canvas{display:block;width:100%;height:100%}.stage-top{position:absolute;top:24px;left:28px;right:28px;display:flex;justify-content:space-between;gap:10px;pointer-events:none}.stage-top>*{pointer-events:auto}.view-tabs{display:flex;gap:4px;padding:4px;border:1px solid #40515a80;border-radius:10px;background:#15242bea;box-shadow:0 4px 20px #09101322}.view-tabs button{border:0;background:transparent;color:#a6bac2;font-size:13px;padding:9px 13px;border-radius:6px;white-space:nowrap}.view-tabs button[aria-pressed=true]{background:#d9f36e;color:#17251e;font-weight:650}.view-caption{position:absolute;top:100px;left:32px;pointer-events:none}.view-caption .eyebrow{color:#bfd0d6;font-size:10px}.view-caption p{font-size:14px;color:#92aab4;margin:8px 0}.orientation{position:absolute;right:22px;top:96px;display:flex;flex-direction:column;gap:5px}.orientation button{width:49px;height:34px;padding:0;border:1px solid #41545c70;background:#182a32bb;border-radius:6px;color:#a3bcc6;font-size:11px}.orientation button.active{border-color:#d9f36e80;color:var(--accent);background:#2c3b2f}.bottom-controls{position:absolute;bottom:54px;left:28px;right:28px;background:#142128f0;border:1px solid #40525d80;border-radius:12px;padding:19px 20px 14px;box-shadow:0 15px 40px #07121840;display:flex;gap:25px;align-items:center;backdrop-filter:blur(12px)}.explode-control{width:195px;min-width:145px}.explode-control label{font-size:12px;color:#bcced4;display:flex;justify-content:space-between;gap:12px;margin-bottom:10px}.explode-control output{color:var(--accent);font-variant-numeric:tabular-nums;font-size:11px}input[type=range]{width:100%;height:4px;display:block;margin:0;accent-color:var(--accent);cursor:pointer;touch-action:pan-y;appearance:none;border-radius:4px;background:linear-gradient(to right,var(--accent) var(--range,0%),#3c525d var(--range,0%))}input[type=range]::-webkit-slider-thumb{appearance:none;width:14px;height:14px;border:3px solid #d9f36e;background:#18291f;border-radius:50%;box-shadow:0 0 0 3px #d9f36e15}input[type=range]::-moz-range-thumb{width:10px;height:10px;border:3px solid #d9f36e;background:#18291f;border-radius:50%}.animation-controls{display:flex;gap:5px;align-items:center;flex:1;justify-content:flex-end;flex-wrap:wrap}.animation-controls button{border:1px solid transparent;background:transparent;border-radius:7px;color:#c1d1d7;display:flex;align-items:center;gap:7px;font-size:12px;min-height:38px;padding:7px 10px}.animation-controls button>span{font-size:22px;line-height:20px;color:#a2bac4}.animation-controls button[aria-pressed=true]{color:var(--accent);border-color:#62744080;background:#33433480}.animation-controls button[aria-pressed=true]>span{color:var(--accent)}.animation-controls button:hover{background:#293b44}.stage-foot{position:absolute;bottom:20px;left:31px;right:31px;display:flex;justify-content:space-between;gap:12px;font-size:9px;letter-spacing:1px;color:#849ca7;pointer-events:none}.stage-foot span+span{letter-spacing:.2px;font-size:10px}.stage-foot b{margin:0 6px;font-weight:400}.pick-hint{position:absolute;bottom:168px;left:32px;font-size:12px;color:#aec3cc;pointer-events:none;display:flex;gap:9px;align-items:center}.pick-hint>span{color:var(--accent);font-size:23px}.hover-label{position:absolute;background:#d9f36e;color:#182719;border-radius:5px;font-size:12px;padding:8px 12px;pointer-events:none;z-index:20;max-width:240px;box-shadow:0 8px 30px #08100a50}.detail{position:absolute;right:26px;bottom:158px;width:298px;max-height:calc(100% - 248px);overflow:auto;background:#142329f5;border:1px solid #41555f;border-radius:12px;padding:18px 22px 21px;box-shadow:0 18px 60px #07111570;backdrop-filter:blur(16px)}.detail-top{display:flex;align-items:center;justify-content:space-between}.detail-top .eyebrow{font-size:9px;max-width:200px;line-height:1.5;color:var(--accent)}.icon-button{display:inline-flex;align-items:center;justify-content:center;border:0;background:transparent;font-size:24px;width:30px;height:30px;color:#9ab2bd;flex-shrink:0;border-radius:5px}.icon-button:hover{background:#2a3b43}.detail-number{display:block;font-size:11px;font-variant-numeric:tabular-nums;color:#8fa8b3;margin:13px 0 6px}.detail h2{font-size:24px;margin:0 0 14px}.detail>p{font-size:14px;line-height:1.65;margin:0;color:#becfd6}.detail-note{border-top:1px solid #31464f;margin-top:18px;padding-top:15px}.detail-note>span{font-size:9px;letter-spacing:1.4px;color:#8fa9b6}.detail-note p{font-size:13px;line-height:1.6;color:#9fb7c2;margin:8px 0 17px}.detail-actions{display:flex;gap:8px}.primary-button,.secondary-button{padding:11px 12px;border-radius:7px;font-size:12px}.primary-button{flex:1;background:var(--accent);color:#1d2b1f;border:1px solid var(--accent);font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:12px}.primary-button span{font-size:18px}.secondary-button{background:#233740;border:1px solid #3b5360}.return-button{border:0;background:transparent;color:var(--accent);font-size:13px;padding:15px 0 0}.loading{position:absolute;inset:0;background:#17272e;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:30}.loading span{width:36px;height:36px;border:2px solid #4b6164;border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite}.loading p{font-size:14px;color:var(--muted)}@keyframes spin{to{transform:rotate(360deg)}}.error-panel{position:absolute;left:50%;top:45%;transform:translate(-50%,-50%);background:#22323b;padding:26px;max-width:460px;width:90%;border:1px solid #647078;border-radius:12px;z-index:35}.error-panel p{line-height:1.6}.error-panel button{background:var(--accent);color:var(--dark);border:0;border-radius:6px;padding:12px}dialog{background:#16262e;color:var(--text);border:1px solid #455b67;border-radius:16px;padding:38px;width:min(600px,92vw);max-height:85dvh;box-shadow:0 35px 100px #0008}dialog::backdrop{background:#071018bb;backdrop-filter:blur(5px)}dialog .dialog-close{position:absolute;top:15px;right:15px}dialog h2{font-size:29px;margin:14px 0 25px}dialog p,dialog li{font-size:16px;line-height:1.7;color:#b6ccd4}dialog h3{font-size:17px;margin-top:30px}dialog a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}dialog li{margin:12px 0}dialog ul{padding-left:19px}.help-row{display:flex;gap:20px;margin:23px 0}.help-row>b{color:var(--accent);font-size:14px;padding-top:4px}.help-row p{margin:0;font-size:15px}.help-row strong{display:block;color:var(--text);margin-bottom:5px;font-weight:550}.keyboard-note{border-top:1px solid #344952;padding-top:20px;font-size:13px!important;color:#94afb9!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.mobile-only{display:none}
@media(min-width:1650px){.workspace{grid-template-columns:310px minmax(0,1fr)}.catalog-head{padding:35px 28px 24px}h1{font-size:36px}.part-pick{font-size:14px}.group-toggle{padding:17px 10px}.detail{width:320px}.detail>p{font-size:16px}.detail-note p{font-size:14px}.view-tabs button{font-size:14px}.bottom-controls{max-width:940px;margin:auto}.animation-controls button{font-size:14px}.explode-control label{font-size:14px}}
@media(max-width:1150px){.workspace{grid-template-columns:245px minmax(0,1fr)}.header-meta{display:none}.catalog-head{padding:26px 20px 18px}h1{font-size:28px}.catalog-label{font-size:9px}.catalog-label button{font-size:11px}.group-toggle{font-size:13px;gap:6px}.bottom-controls{gap:15px;left:18px;right:18px;padding:16px 14px 13px;flex-direction:column;align-items:stretch}.explode-control{width:100%;margin-bottom:3px}.animation-controls{justify-content:space-between;gap:0}.animation-controls button{padding:4px 7px;font-size:11px}.detail{bottom:201px;right:18px;width:270px;max-height:calc(100% - 300px);padding:14px 18px 18px}.pick-hint{bottom:210px}.stage-top{left:20px;right:20px}.stage-foot span:first-child{display:none}.stage-foot{justify-content:center}.view-caption{left:24px}.orientation{right:18px}}
@media(max-width:760px){.topbar{height:66px;padding:0 17px}.brand{font-size:16px;gap:9px;letter-spacing:1.4px}.brand-mark{width:37px;height:37px;border-radius:9px;font-size:20px}.brand small{font-size:8px;margin-top:4px}.quiet-button{padding:8px 11px;font-size:12px}.workspace{display:block;height:calc(100dvh - 66px);min-height:570px}.stage{height:100%}.catalog{position:fixed;left:0;top:66px;bottom:0;width:min(320px,88vw);box-shadow:15px 0 70px #0009;transform:translateX(-110%);transition:transform .25s;z-index:50}.catalog.visible{transform:translateX(0)}.mobile-only{display:inline-flex}.catalog-head{padding:25px 22px 20px}h1{font-size:32px}.group-toggle{font-size:14px}.part-pick{font-size:14px}.stage-top{top:15px;left:12px;right:12px;align-items:center}.view-tabs{padding:3px;gap:2px;border-radius:8px}.view-tabs button{font-size:11px;padding:9px 8px}.stage-top .quiet-button{gap:5px;border-color:#536570;background:#1b2d35;padding:10px 8px;font-size:11px}.stage-top #mobile-count{color:var(--accent);font-size:10px}.view-caption{top:79px;left:17px}.view-caption p{font-size:12px}.view-caption .eyebrow{font-size:9px}.orientation{top:77px;right:12px;gap:4px}.orientation button{width:43px;height:31px;font-size:10px}.bottom-controls{bottom:41px;left:12px;right:12px;border-radius:10px;padding:15px 13px 10px;gap:11px}.explode-control label{font-size:12px}.animation-controls button{flex-direction:column;gap:3px;font-size:10px;min-height:47px;padding:4px 5px}.animation-controls button>span{font-size:22px}.pick-hint{left:18px;bottom:191px;font-size:11px}.stage-foot{bottom:15px;left:10px;right:10px;font-size:10px}.detail{left:12px;right:12px;width:auto;bottom:182px;max-height:41%;padding:13px 16px 16px;border-radius:10px}.detail h2{font-size:21px;margin-bottom:9px;padding-right:20px}.detail-number{margin:5px 0;font-size:10px}.detail>p{font-size:14px;line-height:1.5}.detail-note{margin-top:12px;padding-top:10px}.detail-note p{font-size:13px;margin:6px 0 12px}.detail-top .eyebrow{font-size:10px}.detail-actions{position:relative}.detail-top{min-height:25px}.primary-button,.secondary-button{font-size:13px;padding:10px 12px}.key{margin-left:7px}dialog{padding:30px 24px}dialog p,dialog li{font-size:15px}.help-row{gap:14px}.help-row p{font-size:14px}}
@media(max-height:730px) and (min-width:761px){.catalog-head{padding-top:20px;padding-bottom:14px}h1{font-size:27px}.model-meta{padding-bottom:17px}.search{margin-bottom:18px}.detail{max-height:calc(100% - 280px)}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}.loading span{animation:none}}

/* Readable component names and explanations, including on smaller screens. */
.site-nav{display:flex;gap:5px;align-items:center}.site-nav a{padding:9px 12px;font-size:14px;border-radius:6px;color:#b5cbd2}.site-nav a[aria-current=page]{background:#344630;color:var(--accent)}
.part-pick,.group-toggle{font-size:14px}.detail>p{font-size:16px}.detail-note p{font-size:14px}.detail-actions button{font-size:14px}.help-row p{font-size:16px}.catalog-foot p{font-size:12px}.eyebrow{font-size:12px}.detail-top .eyebrow{font-size:12px;letter-spacing:1px}.detail-note>span{font-size:12px;letter-spacing:1px}.orientation button{font-size:12px}.brand small{font-size:12px;letter-spacing:1px}.catalog-label{font-size:12px;letter-spacing:.5px}.catalog-label button{font-size:12px}.view-caption .eyebrow{font-size:12px}.stage-foot span{font-size:12px!important;letter-spacing:0}.explode-control label{font-size:14px}.animation-controls button{font-size:12px}.view-tabs button{font-size:14px}.pick-hint{font-size:14px}.detail-number{font-size:12px}
@media(max-width:1150px){.catalog-label{padding:0 14px 12px}.group-toggle{font-size:14px}.animation-controls button{font-size:12px}}
@media(max-width:760px){.brand small{font-size:9px}.stage-top{flex-wrap:wrap}.view-tabs{width:100%;justify-content:space-between}.view-tabs button{flex:1;padding:9px 7px;font-size:13px}.stage-top #catalog-open{position:absolute;top:57px;left:0;padding:9px 11px;font-size:13px}.view-caption{top:126px}.view-caption p{display:none}.view-caption .eyebrow{font-size:11px}.orientation{top:75px}.pick-hint{font-size:12px;left:16px;max-width:calc(100% - 30px)}.stage-foot span+span{font-size:11px!important}.animation-controls{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:2px}.animation-controls button{font-size:11px;line-height:1.5;white-space:normal;overflow-wrap:anywhere}.detail-top .eyebrow{font-size:11px}.detail>p{font-size:16px}.catalog-label{font-size:12px}}

@media(max-width:760px){.topbar:has(.site-nav){height:108px;flex-wrap:wrap;gap:5px;padding:9px 16px}.topbar:has(.site-nav) .brand{margin-right:auto}.site-nav{order:3;flex:1 0 100%;justify-content:center;gap:8px}.site-nav a{font-size:14px;padding:7px 12px}.workspace{height:calc(100dvh - 108px)}.catalog{top:108px}}

/* Model selection belongs to the locomotive viewer; wagon layout stays independent. */
.locomotive-picker{min-height:70px;display:flex;align-items:center;gap:20px;padding:12px 30px;border-bottom:1px solid var(--line);background:#18262b}
.locomotive-picker label{font-size:11px;letter-spacing:1px;color:var(--muted)}
.locomotive-picker select{font:inherit;font-size:15px;font-weight:600;min-height:42px;background:#263930;color:var(--accent);border:1px solid #617743;border-radius:8px;padding:9px 34px 9px 12px;max-width:100%;cursor:pointer}
.locomotive-picker select:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.locomotive-picker>span{font-size:13px;color:var(--muted)}
.locomotive-page .workspace{height:calc(100dvh - 154px)}
.locomotive-page h1 b{font-weight:600;font-size:25px;letter-spacing:-.7px}
@media(max-width:760px){.locomotive-picker{height:78px;min-height:78px;padding:9px 16px;gap:3px;display:flex;flex-wrap:wrap}.locomotive-picker label{width:100%;font-size:10px}.locomotive-picker select{width:100%;min-height:38px;padding:7px 10px;font-size:14px}.locomotive-picker>span{display:none}.locomotive-page .workspace{height:calc(100dvh - 186px)}.locomotive-page .catalog{top:186px}}