* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --side-w: 420px;
  --prev-h: 340px;
  --bg: #15181d;
  --panel: #1c2027;
  --line: #2c323c;
  --fg: #d8dee8;
  --dim: #8b95a5;
  --accent: #e0a24a;
  --accent2: #59a5d8;
  --route: #d9482c;
}

html, body { height: 100%; }
body {
  background: var(--bg); color: var(--fg);
  font: 13px/1.45 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  overflow: hidden;
}

#app { display: flex; height: 100vh; }

/* ---------------------------------------------------------------- map */

#mapwrap { position: relative; flex: 1; min-width: 0; }
#map { display: block; width: 100%; height: 100%; cursor: grab; }
#map.panning { cursor: grabbing; }

#maphud {
  position: absolute; top: 12px; left: 12px;
  display: flex; gap: 8px; align-items: center;
}
#hint { color: var(--dim); font-size: 12px;
  background: rgba(21,24,29,.72); padding: 4px 9px; border-radius: 5px; }


#scalebar {
  position: absolute; left: 12px; bottom: 12px;
  background: rgba(21,24,29,.72); padding: 5px 8px; border-radius: 5px;
  font-size: 11px; color: var(--fg);
}
#scalebar-line { height: 3px; background: var(--fg); margin-bottom: 3px; }

#readout {
  position: absolute; right: 12px; bottom: 12px;
  background: rgba(21,24,29,.78); padding: 6px 10px; border-radius: 5px;
  font-size: 11px; color: var(--dim); white-space: pre; text-align: right;
}

/* -------------------------------------------------------------- sidebar */

#splitter {
  width: 7px; flex: none; cursor: col-resize;
  background: var(--line); border-left: 1px solid #0d1014;
}
#splitter:hover, #splitter.active { background: var(--accent); }

#side {
  width: var(--side-w); flex: none; background: var(--panel);
  overflow-y: auto; padding: 14px 14px 40px;
}
h1 { font-size: 15px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px; }
h2 { font-size: 11px; letter-spacing: .09em; text-transform: uppercase;
  color: var(--dim); margin-bottom: 8px; }
section { border-top: 1px solid var(--line); padding: 12px 0; }
section:first-of-type { border-top: none; }

label { display: flex; justify-content: space-between; align-items: center;
  margin: 7px 0 3px; font-size: 12px; }
label.row { justify-content: flex-start; gap: 8px; }
.val { color: var(--dim); font-size: 11px; }
input[type=number], select {
  width: 68px; background: #12151a; color: var(--fg);
  border: 1px solid var(--line); border-radius: 4px;
  padding: 3px 5px; font: inherit; font-size: 12px; text-align: right;
}
select { width: 108px; text-align: left; }
input[type=range] { width: 100%; accent-color: var(--accent); margin-bottom: 4px; }
input[type=checkbox] { accent-color: var(--accent2); }

.note, .dim { color: var(--dim); font-size: 11px; }
.derived { margin-top: 10px; padding: 8px 10px; background: #12151a;
  border-radius: 5px; font-size: 12px; line-height: 1.6; }
.derived b { color: var(--accent); font-weight: 600; }

/* the wrapper carries the CSS resize handle (more reliable than resizing a
   replaced element); ResizeObserver keeps the canvas backing store in step */
#view3dwrap {
  height: var(--prev-h); resize: vertical; overflow: hidden;
  min-height: 160px; max-height: 78vh;
  border: 1px solid var(--line); border-radius: 5px; background: #0f1216;
}
#view3d { display: block; width: 100%; height: 100%; cursor: grab; }
#view3d.drag { cursor: grabbing; }

#stats { margin-top: 9px; font-size: 11.5px; line-height: 1.65; }
#stats .pk { color: var(--fg); }
#stats .warn { color: var(--accent); }
#stats table { width: 100%; border-collapse: collapse; }
#stats td { padding: 1px 0; }
#stats td:last-child { text-align: right; color: var(--dim); }

/* Size is the only hard choice in this build, so it reads as a pair of
   options rather than another slider in the stack. */
#sizepick { display: flex; gap: 8px; margin-bottom: 8px; }
#sizepick label {
  flex: 1; margin: 0; padding: 8px 6px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--line); border-radius: 5px;
  background: var(--panel); color: var(--dim);
}
#sizepick label:hover { border-color: var(--dim); }
#sizepick input { accent-color: var(--accent2); margin: 0; }
#sizepick label:has(input:checked) {
  border-color: var(--accent2); color: var(--fg);
}
#sizepick input:focus-visible { outline: 2px solid var(--accent2); outline-offset: 2px; }

button.primary {
  width: 100%; margin-top: 4px; padding: 8px 11px;
  background: var(--accent2); border: 1px solid var(--accent2);
  border-radius: 5px; color: #061621; font: inherit; font-weight: 600;
  cursor: pointer;
}
button.primary:hover { filter: brightness(1.12); }
button.primary:focus-visible { outline: 2px solid var(--fg); outline-offset: 2px; }

#config-out { margin-top: 9px; font-size: 11.5px; }
.cfg-sum { color: var(--fg); margin-bottom: 6px; }
.cfg-code {
  display: block; word-break: break-all; line-height: 1.5;
  color: var(--dim); background: rgba(0,0,0,.25);
  border: 1px solid var(--line); border-radius: 4px; padding: 7px 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 10.5px;
}
.cfg-err { color: #e07a5f; }

#pedpick { display: flex; gap: 6px; margin-bottom: 8px; }
#pedpick label {
  flex: 1; margin: 0; padding: 7px 4px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 5px;
  border: 1px solid var(--line); border-radius: 5px;
  background: var(--panel); color: var(--dim); font-size: 12px;
}
#pedpick label:hover { border-color: var(--dim); }
#pedpick input { accent-color: var(--accent2); margin: 0; }
#pedpick label:has(input:checked) { border-color: var(--accent2); color: var(--fg); }
#pedpick input:focus-visible { outline: 2px solid var(--accent2); outline-offset: 2px; }

a.cfg-cart {
  display: block; margin-top: 9px; padding: 10px; text-align: center;
  background: var(--accent2); color: #061621; border-radius: 5px;
  text-decoration: none; font-weight: 600;
}
a.cfg-cart:hover { filter: brightness(1.12); }
a.cfg-cart:focus-visible { outline: 2px solid var(--fg); outline-offset: 2px; }