:root{
  --purple:#2b0f4c;--purple-deep:#1d0836;--purple-mid:#43206e;--line:#4d2e78;
  --red:#e8262b;--orange:#ff7a1a;--yellow:#ffd23f;
  --sky:#4fa8e8;--sky-pale:#cfebfb;--cloud:#f7faff;--muted:#b9a7d6;
  --flame:linear-gradient(180deg,#ffe15a 8%,#ff9a1f 45%,#f0412a 75%,#d81f3c 100%);
  --overlay:rgba(36,11,66,.92);
  --display:'Racing Sans One','Arial Black',sans-serif;
  --condensed:'Barlow Condensed','Arial Narrow',sans-serif;
  --body:'Barlow',Arial,Helvetica,sans-serif;
}
*{box-sizing:border-box}
body{margin:0;background:var(--purple);color:var(--cloud);font-family:var(--body);font-size:14px}
button,a,input,select{-webkit-tap-highlight-color:transparent}
button,select{font:inherit}
button{cursor:pointer;color:inherit;border:1px solid var(--line);background:transparent;border-radius:4px;transition:background .18s,border-color .18s,color .18s}
button:hover{background:var(--purple-mid);border-color:#7a53ad}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--yellow);outline-offset:3px}
button:disabled{cursor:wait;opacity:.4}
a{color:inherit}

/* Header: a strip of poster sky */
header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 30px;gap:20px;background:linear-gradient(90deg,rgba(255,255,255,.12),rgba(255,255,255,0) 40%),url(img/sky.jpg) left 30%/cover,var(--sky);border-bottom:3px solid var(--purple-deep);color:var(--purple-deep)}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none}
.brand strong{font-family:var(--display);font-weight:400;font-size:52px;line-height:1;letter-spacing:-1px;text-transform:uppercase;transform:skewX(-8deg) rotate(-4deg);padding:0 6px 4px 0;background:var(--flame);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-stroke:2px var(--purple-deep);paint-order:stroke fill;filter:drop-shadow(3px 3px 0 var(--purple-deep))}
.brand>span{font-family:var(--condensed);font-weight:800;font-style:italic;font-size:20px;line-height:1;color:var(--cloud);text-shadow:2px 2px 0 var(--purple-deep)}
.brand small{display:block;font-family:var(--body);font-style:normal;font-weight:500;font-size:11px;margin-top:4px;color:var(--purple-deep);text-shadow:none}
.header-note{font-family:var(--condensed);font-style:italic;font-weight:700;font-size:17px;color:var(--purple-deep)}
.header-actions{display:flex;align-items:center;gap:20px}
.edition{font-family:var(--condensed);font-weight:600;font-size:14px;color:var(--purple-deep)}
.icon-button{width:34px;height:30px;border-radius:3px;background:var(--yellow);border:2px solid var(--purple-deep);color:var(--purple-deep);font-family:var(--condensed);font-weight:800;font-size:17px}
.icon-button:hover{background:#fff;border-color:var(--purple-deep)}

main{display:flex;height:calc(100dvh - 76px);min-height:550px}

/* Sidebar */
aside{width:340px;flex-shrink:0;padding:24px 25px 20px;overflow:auto;scrollbar-width:thin;scrollbar-color:#6a45a0 transparent;display:flex;flex-direction:column;z-index:3;background:linear-gradient(180deg,var(--purple) 0%,var(--purple-deep) 100%)}
.track-switch{display:flex;background:var(--purple-deep);padding:4px;border:1px solid var(--line);border-radius:5px;margin:0 0 26px;gap:4px}
.track-switch button{font-family:var(--condensed);font-size:16px;font-weight:700;flex:1;padding:9px 3px;border:0;color:var(--muted)}
.track-switch button[aria-pressed=true]{background:var(--yellow);color:var(--purple-deep)}
.kicker{font-family:var(--condensed);font-style:italic;font-weight:700;font-size:17px;color:var(--yellow);margin:0 0 4px}
h1{font-family:var(--condensed);font-weight:700;font-size:26px;line-height:1.05;margin:0 0 16px}
h1 em{display:inline-block;font-family:var(--display);font-style:normal;font-weight:400;font-size:60px;line-height:1;letter-spacing:-1px;margin:2px 0 0 -3px;padding:0 8px 6px 2px;transform:skewX(-6deg) rotate(-3deg);transform-origin:left bottom;background:var(--flame);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-stroke:2px var(--purple-deep);paint-order:stroke fill;filter:drop-shadow(3px 3px 0 #120424)}
#track-description{font-size:14px;line-height:1.55;color:#ddd0f0;margin:0;max-width:34em}
.facts{display:flex;gap:26px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:20px 0;padding:14px 0}
.facts span{display:block;font-family:var(--condensed);font-weight:600;font-size:13px;color:var(--muted);margin-bottom:4px}
.facts strong{font-size:14px;font-weight:500}
.facts sup{font-size:9px;color:var(--yellow)}
.primary{display:flex;align-items:center;justify-content:space-between;background:var(--red);color:#fff;border:0;border-radius:4px;padding:10px 10px 10px 16px;font-family:var(--condensed);font-weight:800;font-style:italic;font-size:21px;box-shadow:0 3px 0 #8e0f25}
.primary:hover{background:var(--orange);border:0}
.primary>span:last-child{background:var(--yellow);color:var(--purple-deep);font-style:normal;font-size:17px;padding:3px 9px;border-radius:3px;border:2px solid var(--purple-deep)}
.secondary-row{display:flex;gap:8px;margin:10px 0 26px}
.secondary-row button{flex:1;padding:10px 4px;font-family:var(--condensed);font-weight:700;font-size:16px}
.section-label{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:6px}
.section-label h2{font-family:var(--condensed);font-weight:700;font-style:italic;font-size:18px;margin:0;color:var(--cloud)}
.section-label>span{font-family:var(--condensed);font-weight:600;font-size:14px;color:var(--muted)}
.landmark{display:flex;align-items:center;gap:13px;border:0;border-bottom:1px solid var(--line);border-radius:0;width:100%;text-align:left;padding:10px 4px;font-size:14px}
.landmark .plate{flex-shrink:0;width:30px;height:24px;display:grid;place-items:center;background:var(--yellow);color:var(--purple-deep);font-family:var(--condensed);font-weight:800;font-size:15px;border-radius:3px 3px 8px 8px}
.landmark span:last-child{margin-left:auto;color:#8b72b3}
.landmark.active{color:var(--yellow)}
.landmark.active .plate{background:var(--red);color:#fff}
.sidebar-bottom{margin-top:auto;padding-top:22px}
.sidebar-bottom button{border:0;border-radius:0;display:block;font-size:13px;color:var(--cloud);padding:6px 0;text-decoration:underline;text-decoration-color:#7a53ad;text-underline-offset:3px}
.sidebar-bottom button:hover{background:transparent;color:var(--yellow)}
.sidebar-bottom p{color:#9c88bd;font-size:12px;line-height:1.55;margin:12px 0 0}

/* Viewport and overlays */
#viewport{position:relative;flex:1;min-width:0;overflow:hidden;background:#a9d6f5}
#scene{display:block;width:100%;height:100%;touch-action:none;outline:none}
.viewport-top{position:absolute;top:22px;left:24px;right:24px;display:flex;justify-content:space-between;pointer-events:none}
.view-pill{display:flex;gap:9px;align-items:center;background:var(--overlay);color:var(--cloud);border-radius:4px;padding:9px 14px;font-family:var(--condensed);font-weight:700;font-style:italic;font-size:16px}
.view-pill i{width:7px;height:7px;background:var(--orange);border-radius:50%}
.scene-options{display:flex;background:var(--overlay);border-radius:4px;pointer-events:auto;padding:3px}
.scene-options button{border:0;padding:7px 12px;font-family:var(--condensed);font-weight:600;font-size:15px;color:#e4dbf2}
.scene-options button[aria-pressed=true]{color:var(--purple-deep);background:var(--yellow)}
.viewport-bottom{position:absolute;bottom:0;left:0;right:0;display:flex;justify-content:space-between;gap:10px;align-items:center;background:var(--overlay);padding:11px 23px;color:#d8cbee;font-family:var(--condensed);font-weight:600;font-size:14px;pointer-events:none}
.viewport-bottom>div{display:flex;align-items:center;gap:10px}
.small-square{width:8px;height:8px;background:var(--orange);transform:rotate(45deg)}
.viewport-bottom b{color:#7d62a6;margin:0 6px}
#position-readout{white-space:nowrap;font-variant-numeric:tabular-nums}
.map-card{position:absolute;right:24px;bottom:62px;background:var(--overlay);border:1px solid #6a45a066;width:200px;border-radius:5px;padding:10px 12px 8px}
.map-card>div{display:flex;justify-content:space-between;font-family:var(--condensed);font-weight:700;font-size:14px;color:var(--cloud)}
#map-scale{color:var(--muted);font-weight:500;font-size:13px}
#minimap{width:100%;height:118px;display:block}
.map-card p{display:flex;gap:6px;align-items:center;font-size:12px;margin:5px 0 0;color:#d8cbee}
.map-card p i{width:6px;height:6px;background:var(--yellow);border-radius:50%}
.map-card p span:last-child{margin-left:auto;color:var(--muted)}

#loading,#error{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;background:var(--purple-deep);color:var(--cloud);z-index:8;text-align:center;padding:25px}
#loading{justify-content:flex-end;padding-bottom:clamp(40px,12vh,120px)}
.loading-frame{position:absolute;top:0;left:0;width:100%;height:auto;max-height:62%;object-fit:cover;object-position:center 35%;-webkit-mask-image:linear-gradient(180deg,#000 55%,transparent);mask-image:linear-gradient(180deg,#000 55%,transparent)}
#loading>:not(.loading-frame){position:relative}
.loading-mark{font-family:var(--display);font-size:110px;line-height:1;text-transform:uppercase;padding:0 12px 10px 0;transform:skewX(-8deg) rotate(-5deg);background:var(--flame);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-stroke:3px #120424;paint-order:stroke fill;filter:drop-shadow(5px 5px 0 #000)}
#loading h2,#error h2{font-family:var(--condensed);font-style:italic;font-weight:800;font-size:32px;margin:20px 0 0}
#loading p,#error p{font-size:14px;color:var(--muted)}
.load-line{width:200px;height:4px;background:#ffffff88;margin-top:18px;overflow:hidden;border-radius:2px}
.load-line:after{content:'';width:55%;height:100%;display:block;background:linear-gradient(90deg,var(--yellow),var(--orange),var(--red));animation:loading 1.3s infinite}
@keyframes loading{from{transform:translateX(-100%)}to{transform:translateX(190%)}}
@media(prefers-reduced-motion:reduce){.load-line:after{animation:none;width:100%}aside{transition:none!important}}
[hidden]{display:none!important}
#error button{padding:11px 24px;background:var(--red);color:#fff;border:0;font-family:var(--condensed);font-weight:800;font-size:18px}

#walk-prompt{position:absolute;left:50%;top:48%;transform:translate(-50%,-50%);padding:24px;background:var(--overlay);box-shadow:0 20px 80px #1d083666;text-align:center;width:290px;border:1px solid #6a45a0;border-radius:6px}
#walk-prompt strong{font-family:var(--condensed);font-style:italic;font-weight:800;font-size:26px}
#walk-prompt p{color:#d8cbee;font-size:14px;line-height:1.7}
#walk-prompt button{padding:10px 26px;background:var(--red);color:#fff;border:0;font-family:var(--condensed);font-weight:800;font-style:italic;font-size:20px;box-shadow:0 3px 0 #8e0f25}
#walk-prompt button:hover{background:var(--orange)}
#crosshair{position:absolute;top:50%;left:50%;font-size:22px;color:#fff;text-shadow:0 1px 4px var(--purple-deep);pointer-events:none;transform:translate(-50%,-50%)}
#reference-card{position:absolute;top:78px;left:24px;width:310px;background:var(--overlay);border:1px solid #6a45a066;border-radius:6px;overflow:hidden;box-shadow:0 12px 50px #1d083644}
.reference-top{display:flex;justify-content:space-between;align-items:center;padding:6px 12px;font-family:var(--condensed);font-weight:700;font-style:italic;font-size:15px;color:var(--yellow)}
.reference-top button{border:0;font-size:22px;padding:0 4px;line-height:1}
#reference-image{width:100%;height:158px;object-fit:cover;display:block}
.reference-copy{padding:14px 15px 15px}
.reference-copy h2{font-family:var(--condensed);font-weight:800;font-style:italic;font-size:26px;margin:0 0 6px}
.reference-copy p{color:#ddd0f0;font-size:13px;line-height:1.55;margin:0 0 12px}
.reference-copy a{font-size:13px;color:var(--yellow);text-underline-offset:3px}
#tour-controls{position:absolute;bottom:62px;left:24px;right:248px;display:flex;gap:12px;align-items:center;background:var(--overlay);padding:10px 12px;border-radius:5px}
#tour-controls button{border:0;font-family:var(--condensed);font-weight:700;font-size:15px;padding:5px 8px}
#tour-progress{width:100%;min-width:30px;accent-color:var(--orange)}
#tour-speed{background:var(--purple-mid);color:var(--cloud);border:0;font-family:var(--condensed);font-weight:600;font-size:15px;padding:6px;border-radius:3px}
#end-tour{white-space:nowrap}

dialog{max-width:620px;width:calc(100% - 32px);background:var(--purple);color:var(--cloud);border:1px solid #6a45a0;border-top:6px solid var(--orange);border-radius:8px;padding:32px 35px;box-shadow:0 30px 120px #0d021cbb}
dialog::backdrop{background:#1d083699;backdrop-filter:blur(5px)}
.dialog-close{position:absolute;right:12px;top:10px;border:0;font-size:26px;line-height:1}
dialog .kicker{margin:0}
dialog h2{font-family:var(--condensed);font-style:italic;font-weight:800;font-size:36px;line-height:1.05;margin:6px 0 16px}
dialog p,dialog li{color:#ddd0f0;font-size:14px;line-height:1.65}
dialog a{color:var(--yellow);text-underline-offset:3px}
dialog table{border-collapse:collapse;width:100%;font-size:14px}
dialog td{padding:11px 0;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.5}
dialog td:first-child{font-family:var(--condensed);font-weight:700;font-size:16px;color:var(--yellow);width:34%}
#mobile-panel{display:none}
#touch-controls{position:absolute;left:22px;bottom:70px;text-align:center}
#touch-controls button{background:var(--overlay);width:44px;height:44px;margin:2px;touch-action:none}

@media(min-width:1400px){aside{width:370px;padding:28px 30px}h1{font-size:28px}h1 em{font-size:68px}.landmark{padding:12px 4px}}
@media(max-height:820px) and (min-width:801px){aside{padding-top:18px}.track-switch{margin-bottom:16px}h1{font-size:23px}h1 em{font-size:50px}#track-description{line-height:1.45}.facts{margin:14px 0;padding:10px 0}.secondary-row{margin-bottom:16px}.landmark{padding:7px 4px}.sidebar-bottom{padding-top:14px}}
@media(max-width:1050px){header{padding:0 22px}.header-note{display:none}aside{width:300px;padding:22px 20px}h1 em{font-size:52px}.scene-options button{padding:7px 9px}#position-readout{display:none}#reference-card{width:260px}#reference-image{height:135px}#tour-controls{right:24px;bottom:220px}}
@media(max-width:800px){header{height:61px;padding:0 16px}.brand strong{font-size:40px}.brand>span{font-size:17px}.brand small{display:none}.edition{display:none}main{height:calc(100dvh - 61px);min-height:420px}aside{position:absolute;top:61px;bottom:0;left:0;width:300px;transform:translateX(-100%);transition:transform .2s}body.panel-open aside{transform:translateX(0);box-shadow:15px 0 60px #1d083688}.viewport-top{top:14px;left:15px;right:15px}.view-pill{padding:8px 10px;font-size:14px}.scene-options button{font-size:13px;padding:7px}.map-card{width:150px;right:15px;bottom:58px;padding:8px}#minimap{height:88px}.viewport-bottom{padding:10px 15px;min-height:40px;font-size:12px}.viewport-bottom b{margin:0 4px}#mobile-panel{display:block;position:absolute;bottom:58px;left:15px;background:var(--red);color:#fff;border:0;padding:10px 13px;font-family:var(--condensed);font-weight:700;font-size:15px;z-index:4}#reference-card{left:15px;top:64px;width:270px}#tour-controls{bottom:225px;left:15px;right:15px}body.walking #mobile-panel{bottom:225px}body.walking .map-card{bottom:58px}#touch-controls{left:15px;bottom:58px}dialog{padding:26px 22px}}