:root{
  --bg:#050816; --panel:#10172a; --panel2:#172036; --txt:#eef4ff; --muted:#9fb0cc;
  --blue:#38bdf8; --amber:#f59e0b; --red:#ef4444; --green:#22c55e; --border:rgba(255,255,255,.12);
}
*{box-sizing:border-box} html,body{margin:0;min-height:100%;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:radial-gradient(circle at top left,#1e3a8a 0,#050816 42%,#020617 100%);color:var(--txt)}
body{padding:env(safe-area-inset-top) 14px env(safe-area-inset-bottom)}
.app{max-width:720px;margin:0 auto;padding:18px 0 34px}.hero{display:flex;gap:16px;align-items:flex-start;justify-content:space-between;margin:8px 0 18px}.eyebrow{letter-spacing:.16em;text-transform:uppercase;color:var(--blue);font-weight:800;font-size:12px;margin:0 0 8px}h1{font-size:clamp(30px,8vw,54px);line-height:.95;margin:0 0 12px}.sub{color:var(--muted);font-size:16px;line-height:1.45;margin:0}.status-pill{border:1px solid var(--border);border-radius:999px;padding:9px 11px;white-space:nowrap;color:var(--muted);font-size:12px;background:rgba(255,255,255,.06)}
.speed-card,.controls,.log-card,.tips{background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.035));border:1px solid var(--border);border-radius:26px;box-shadow:0 18px 50px rgba(0,0,0,.35);padding:18px;margin:14px 0;backdrop-filter:blur(10px)}
.gauge-wrap{position:relative;display:grid;place-items:center;min-height:230px}.gauge{width:100%;max-width:430px}.gauge-bg,.gauge-arc{fill:none;stroke-linecap:round;stroke-width:16}.gauge-bg{stroke:rgba(255,255,255,.12)}.gauge-arc{stroke:url(#none);stroke:var(--blue);stroke-dasharray:282;stroke-dashoffset:282;filter:drop-shadow(0 0 12px rgba(56,189,248,.65))}.needle{stroke:#fff;stroke-width:4;stroke-linecap:round;transform-origin:120px 120px;transition:transform .22s linear;filter:drop-shadow(0 0 7px rgba(255,255,255,.8))}.hub{fill:var(--amber)}.speed-readout{position:absolute;text-align:center;top:118px}.speed-readout span{font-size:72px;font-weight:900;letter-spacing:-.06em}.speed-readout small{display:block;color:var(--muted);margin-top:-8px}.telemetry{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.telemetry div{background:rgba(0,0,0,.22);border:1px solid var(--border);border-radius:16px;padding:12px;text-align:center}.telemetry span{display:block;font-size:18px;font-weight:800}.telemetry small{color:var(--muted)}
.controls{display:grid;gap:14px}button,select,input{font:inherit}button{border:0;border-radius:18px;padding:16px 18px;font-weight:900;color:#04111f}button:disabled{opacity:.45}.primary{background:linear-gradient(135deg,var(--amber),#fde047)}.secondary{background:#dbeafe;color:#0f172a}label{display:grid;gap:8px;color:var(--muted);font-weight:700}select,input[type=range]{width:100%}select{background:var(--panel);color:var(--txt);border:1px solid var(--border);border-radius:14px;padding:13px}.toggle{grid-template-columns:auto 1fr;align-items:center}.toggle input{width:22px;height:22px}.hidden{display:none!important}.event-log{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;white-space:pre-wrap;color:#cbd5e1;font-size:13px;line-height:1.45;max-height:170px;overflow:auto}h2{margin:0 0 10px;font-size:18px}.tips ul{padding-left:20px;color:var(--muted);line-height:1.45}.tips li{margin:6px 0}@media(max-width:560px){.hero{display:block}.status-pill{display:inline-block;margin-top:12px}.speed-readout span{font-size:62px}.telemetry{grid-template-columns:1fr}.gauge-wrap{min-height:205px}}

.debug-panel{margin-top:12px;padding:10px;border:1px solid rgba(56,189,248,.25);border-radius:14px;color:#bae6fd;background:rgba(14,165,233,.08);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;line-height:1.35;white-space:pre-wrap}.ios-warn{border-color:rgba(245,158,11,.45);background:rgba(245,158,11,.10);color:#fde68a}