/* Written for the Tesla browser (older Chromium): no flex gap, no aspect-ratio, no :has(). */
:root {
  --bg: #0e0f12; --card: #181a20; --card-hi: #20232b; --line: #2a2d35;
  --text: #f2f3f5; --muted: #9aa0ab; --accent: #e31937; --ok: #2fbf71; --warn: #f0b429;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font: 20px/1.4 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex; flex-direction: column; min-height: 100%;
  -webkit-user-select: none; user-select: none;
}

.top { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; }
.brand { display: flex; align-items: center; font-weight: 700; font-size: 26px; }
.brand img { margin-right: 12px; }
.chips { display: flex; align-items: center; }
.chip {
  display: inline-flex; align-items: center; margin-left: 12px; padding: 10px 16px; min-height: 48px;
  border-radius: 999px; background: var(--card); border: 1px solid var(--line); font-size: 17px; color: var(--muted);
}
.chip.ok { color: var(--ok); border-color: rgba(47, 191, 113, .4); }
.chip.warn { color: var(--warn); border-color: rgba(240, 180, 41, .4); }
.toggle { cursor: pointer; }
.toggle input { width: 22px; height: 22px; margin: 0 10px 0 0; accent-color: var(--accent); }

.dash { flex: 1; display: flex; align-items: center; justify-content: center; padding: 8px 24px 16px; flex-wrap: wrap; }

.gauge-wrap { position: relative; width: 460px; max-width: 100%; margin: 0 24px 24px; }
.gauge { display: block; width: 100%; height: auto; }
.gauge path { fill: none; stroke-width: 18; stroke-linecap: round; }
.gauge .track { stroke: var(--card-hi); }
.gauge .redzone { stroke: rgba(227, 25, 55, .35); }
.gauge .needle-arc { stroke: var(--text); transition: stroke .2s; }
.gauge .needle-arc.hot { stroke: var(--accent); }
.readout { position: absolute; left: 0; right: 0; top: 34%; text-align: center; }
.rpm { font-size: 76px; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; letter-spacing: -1px; }
.rpm small { display: block; font-size: 18px; font-weight: 600; color: var(--muted); letter-spacing: 1.2px; text-transform: uppercase; margin-top: 6px; }
.sub { margin-top: 18px; color: var(--muted); font-size: 20px; }
.sub span { margin: 0 14px; }
.sub strong { color: var(--text); font-size: 30px; font-variant-numeric: tabular-nums; }

.controls { width: 440px; max-width: 100%; margin: 0 24px; }
.controls h2 { font-size: 15px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--muted); margin: 0 0 12px; }
.engine {
  display: block; width: 100%; text-align: left; margin: 0 0 12px; padding: 18px 20px; min-height: 84px;
  background: var(--card); border: 2px solid var(--line); border-radius: 18px; color: var(--text); cursor: pointer;
  font: inherit;
}
.engine strong { display: block; font-size: 22px; }
.engine span { color: var(--muted); font-size: 16px; }
.engine[aria-checked="true"] { border-color: var(--accent); background: var(--card-hi); }
.variant { display: flex; align-items: center; flex-wrap: wrap; margin: 4px 0 6px; }
.variant-label { color: var(--muted); font-size: 14px; letter-spacing: 1px; text-transform: uppercase; margin-right: 10px; }
.seg {
  flex: 1; min-height: 52px; margin: 0 0 0 8px; border-radius: 12px; border: 2px solid var(--line);
  background: var(--card); color: var(--muted); font: inherit; font-size: 17px; font-weight: 600; cursor: pointer;
}
.seg[aria-checked="true"] { border-color: var(--accent); color: var(--text); background: var(--card-hi); }
.gas {
  display: block; width: 100%; min-height: 72px; margin: -6px 0 18px; border-radius: 18px; border: 2px solid var(--line);
  background: var(--card); color: var(--text); font: inherit; font-size: 20px; font-weight: 600; cursor: pointer;
  touch-action: none; -webkit-touch-callout: none;
}
.gas.held { background: var(--accent); border-color: var(--accent); }
.gas:disabled { opacity: .4; }
.start {
  display: block; width: 100%; min-height: 84px; margin: 8px 0 18px; border: 0; border-radius: 18px;
  background: var(--accent); color: #fff; font: inherit; font-size: 26px; font-weight: 700; cursor: pointer;
}
.start.on { background: #3a3e48; }
.start:disabled { opacity: .6; }
.volume { display: block; color: var(--muted); font-size: 17px; }
.volume input { display: block; width: 100%; height: 48px; accent-color: var(--accent); }
.hint { color: var(--muted); font-size: 16px; margin: 8px 0 0; }

.foot { padding: 0 24px 16px; color: var(--muted); font-size: 15px; }
.foot summary { cursor: pointer; padding: 8px 0; }
.foot a { color: var(--muted); }
.debug { font: 13px Menlo, Consolas, monospace; margin-top: 8px; }

@media (max-width: 600px) {
  body { font-size: 17px; }
  .top { padding: 12px 16px; }
  .chip { margin-left: 8px; padding: 8px 12px; font-size: 14px; min-height: 40px; }
  .brand { font-size: 20px; }
  .dash { padding: 8px 16px; }
  .gauge-wrap, .controls { margin: 0 0 16px; }
  .rpm { font-size: 56px; }
}