:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --ink: #1d1d1f;
  --ink-2: #55565b;
  --muted: #8a8b90;
  --line: #e2e2de;
  --accent: #2a62c9;
  --warn: #b26a00;
  --crit: #c0362c;
  --good: #2f7d4a;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15161a;
    --surface: #1e1f24;
    --ink: #ececee;
    --ink-2: #b4b5bb;
    --muted: #7d7e85;
    --line: #2e2f36;
    --accent: #6b9cf5;
    --warn: #e3a33b;
    --crit: #f06a5e;
    --good: #5cc283;
  }
}
* { box-sizing: border-box; }
body { margin: 0; padding: 20px 28px 28px; max-width: 1400px; margin-inline: auto; }
header h1 { font-size: 22px; margin: 0 0 6px; font-weight: 600; }
header h1 .sub { color: var(--muted); font-weight: 400; }
header p { margin: 0 0 16px; color: var(--ink-2); max-width: 980px; line-height: 1.45; font-size: 14px; }
a { color: var(--accent); }
code, kbd { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 0.92em; }
kbd { border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 4px; padding: 0 4px; background: var(--surface); }
main { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 16px; }
section { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.view { padding: 8px; position: relative; }
.view canvas { width: 100%; height: auto; display: block; cursor: grab; touch-action: none; }
.view canvas:active { cursor: grabbing; }
.hint { position: absolute; left: 16px; bottom: 12px; font-size: 12px; color: var(--muted); }
.speed { position: absolute; right: 14px; top: 12px; display: flex; gap: 6px; }
.chart-tabs { display: flex; gap: 6px; margin: 4px 0; }
.panel { padding: 14px 16px; font-size: 14px; }
.panel h2 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 16px 0 8px; font-weight: 600; }
.state-row { display: flex; align-items: center; gap: 10px; min-height: 30px; }
.badge { font-weight: 700; letter-spacing: 0.04em; padding: 4px 10px; border-radius: 6px; border: 1px solid var(--line); }
.badge.engaged { color: var(--good); border-color: var(--good); }
.badge.crit { color: var(--crit); border-color: var(--crit); }
.badge.busy { color: var(--warn); border-color: var(--warn); }
.fault { color: var(--crit); font-size: 13px; }
.buttons { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.buttons.grid { display: grid; grid-template-columns: 1fr 1fr; }
button {
  font: inherit; font-size: 13px; padding: 6px 10px; border-radius: 6px; cursor: pointer;
  background: var(--bg); color: var(--ink); border: 1px solid var(--line);
}
button:hover { border-color: var(--accent); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button[aria-pressed="true"] { background: var(--ink); color: var(--surface); }
button.estop { color: var(--crit); border-color: var(--crit); font-weight: 700; }
button.estop[aria-pressed="true"] { background: var(--crit); color: #fff; }
button.active { border-color: var(--accent); color: var(--accent); }
.msg { min-height: 18px; font-size: 12px; color: var(--ink-2); }
.keys { color: var(--ink-2); font-size: 12.5px; margin: 6px 0 0; }
.slider { display: grid; grid-template-columns: 1fr auto; gap: 2px 8px; margin: 6px 0 10px; font-size: 13px; }
.slider input { grid-column: 1 / -1; width: 100%; accent-color: var(--accent); }
.slider output { color: var(--ink-2); font-variant-numeric: tabular-nums; }
.readout { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 13px; }
.readout th { text-align: left; font-weight: 400; color: var(--ink-2); padding: 3px 0; }
.readout td { text-align: right; font-variant-numeric: tabular-nums; }
.charts { grid-column: 1 / -1; padding: 10px 14px; display: grid; gap: 6px; }
figure { margin: 0; }
figcaption { font-size: 13px; color: var(--ink-2); margin: 4px 0; }
.charts canvas { width: 100%; height: auto; display: block; }
footer { margin-top: 14px; font-size: 12px; color: var(--muted); }
@media (max-width: 900px) { main { grid-template-columns: 1fr; } }