:root {
  --bg: #020817; --panel: #0f172a; --border: #1e293b; --fg: #f8fafc; --muted: #94a3b8; --accent: #60a5fa;
  --grid: rgba(148,163,184,.12); --zero: rgba(148,163,184,.5);
  --z-sc: rgba(250,204,21,.18); --z-vsc: rgba(250,204,21,.08); --z-red: rgba(239,68,68,.18); --z-ignored: rgba(148,163,184,.10);
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg: #ffffff; --panel: #f1f5f9; --border: #cbd5e1; --fg: #0f172a; --muted: #475569; --accent: #2563eb;
  --grid: rgba(71,85,105,.14); --zero: rgba(15,23,42,.55);
  --z-sc: rgba(234,179,8,.22); --z-vsc: rgba(234,179,8,.10); --z-red: rgba(220,38,38,.14); --z-ignored: rgba(100,116,139,.12);
  color-scheme: light;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 14px/1.4 ui-sans-serif, system-ui, sans-serif; }
header { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
header h1 { font-size: 16px; margin: 0 12px 0 0; }
header a { color: var(--muted); font-size: 12px; }
select, button {
  background: var(--panel); color: var(--fg); border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 8px; font: inherit;
}
button { cursor: pointer; }
select:disabled, button:disabled { opacity: .5; }
#status { color: var(--muted); font-size: 12px; margin-left: auto; }
#status.err { color: #f87171; }
main { padding: 12px 16px; }
#info { color: var(--muted); font-size: 12px; margin-bottom: 8px; min-height: 18px; }
#info b { color: var(--fg); font-weight: 600; }
.wrap { position: relative; height: calc(100svh - 150px); min-height: 420px; }
#legend { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 10px; }
#legend button { display: flex; align-items: center; gap: 6px; padding: 3px 8px; font-size: 12px; }
#legend button.off { opacity: .35; }
#legend i { width: 18px; height: 0; border-top: 3px solid; }
#legend i.dash { border-top-style: dashed; }
#legend i.bi { border-top: 0; height: 3px; outline: 1px solid var(--border); }
.keys { color: var(--muted); font-size: 11px; margin-top: 8px; }
.sc.z-sc { background: var(--z-sc); } .sc.z-vsc { background: var(--z-vsc); }
.sc.z-red { background: var(--z-red); } .sc.z-ignored { background: var(--z-ignored); outline: 1px solid var(--border); }
.sc { display: inline-block; width: 12px; height: 10px; vertical-align: middle; margin: 0 3px 0 8px; }
.tyre-tip {
  display: none; position: absolute; z-index: 5; pointer-events: none; max-width: 360px;
  padding: 6px 8px; border-radius: 6px; font-size: 12px;
  background: var(--panel); color: var(--fg); border: 1px solid var(--border); box-shadow: 0 4px 12px rgba(0,0,0,.25);
}
label.check { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--fg); cursor: pointer; }
.tyre-key { display: inline-block; width: 12px; height: 12px; border-radius: 50%; vertical-align: middle; margin: 0 3px 0 8px;
  font: 700 8px/12px ui-sans-serif, system-ui, sans-serif; text-align: center; color: #111; border: 1px solid var(--border); }
.live-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: #64748b; margin-right: 6px; }
.live-dot.on { background: #ef4444; animation: blink 1.2s infinite; }
@keyframes blink { 50% { opacity: .3; } }