:root{
  --bg:#0e1218; --panel:#141a23d9; --line:#26303f;
  --text:#e8e6df; --faint:#8593a6; --dim:#5b6878; --amber:#f0a848;
  /* canvas tokens (read into the JS palette) */
  --road:#272d37; --road-on-map:#5b6a80; --edge:#4a5566; --lane:#3a4453; --grid:#1c232e; --node:#2e3540;
  --v-stop:#e0584f; --v-slow:#f0a848; --v-free:#5fd0b8; --brake:#ff4d3d;
  --sig-g:#5fd07a; --sig-y:#f0c848; --sig-r:#e04848; --sig-s:#c04040; --sig-p:#8a7a48;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{background:var(--bg);color:var(--text);font-family:'IBM Plex Mono',ui-monospace,monospace;overflow:hidden}
#scene{display:block;position:fixed;inset:0;width:100vw;height:100vh;cursor:grab}
#scene.dragging{cursor:grabbing}
code{color:var(--amber)}

header{position:fixed;top:0;left:0;right:0;padding:18px 24px 0;pointer-events:none;z-index:3}
h1{font-weight:500;font-size:clamp(18px,2.6vw,26px);letter-spacing:.18em}
.sub{color:var(--faint);font-size:12px;margin-top:4px;line-height:1.45}

.controls{position:fixed;top:18px;right:24px;z-index:4;display:flex;align-items:center;gap:8px;
  border:1px solid var(--line);background:var(--panel);backdrop-filter:blur(6px);border-radius:10px;padding:6px}
.controls button,.controls label{appearance:none;border:0;background:transparent;color:var(--faint);
  font-family:inherit;font-size:12px;padding:7px 10px;border-radius:6px;cursor:pointer;
  transition:color .2s,background .2s}
.controls button:hover,.controls label:hover{color:var(--text);background:#1c2532}
.controls #play{font-size:14px;min-width:38px;color:var(--amber)}
.rates{display:flex;border-left:1px solid var(--line);border-right:1px solid var(--line);padding:0 4px}
.rates button.active,.samples button.active,#map.active{color:var(--text);background:#1c2532}
#map:disabled{opacity:.35;cursor:default}
#attrib{position:fixed;right:24px;bottom:186px;z-index:3;font-size:10px;color:var(--dim);
  background:#0e1218aa;padding:2px 6px;border-radius:4px}
#attrib a{color:var(--faint);text-decoration:none}
#attrib.hidden{display:none}
.samples{display:flex;border-right:1px solid var(--line);padding:0 4px}
.controls input[type=file]{display:none}
.controls :focus-visible{outline:2px solid var(--amber);outline-offset:-2px}

.bottom{position:fixed;left:24px;right:24px;bottom:18px;z-index:3;
  border:1px solid var(--line);background:var(--panel);backdrop-filter:blur(6px);border-radius:10px;padding:10px 14px 8px}
.hud{display:flex;gap:22px;font-size:12px;color:var(--faint);margin-bottom:8px;flex-wrap:wrap}
.hud b{color:var(--text);font-weight:500}
.hud .right{margin-left:auto;color:var(--dim);font-size:11px}
#strip{display:block;width:100%;height:130px;border-radius:4px;cursor:col-resize;touch-action:none}
.axis{font-size:10px;color:var(--dim);margin-top:6px;letter-spacing:.06em}

#drop{position:fixed;inset:0;z-index:9;display:grid;place-items:center;font-size:22px;letter-spacing:.2em;
  background:#0e1218cc;border:2px dashed var(--amber);color:var(--amber);pointer-events:none;transition:opacity .2s}
#drop.hidden{opacity:0}

@media (max-width:720px){
  .bottom{left:10px;right:10px;bottom:10px}
  .hud .right{display:none}
  #strip{height:90px}
}