:root { --bg:#0b1220; --card:#121a2a; --ink:#e7ecf7; --muted:#9fb0ce; --ok:#7cf29a; --warn:#ffd166; --err:#ff6b6b; --acc:#7ab8ff; }
    html,body{height:100%}
    body{margin:0; font-family: system-ui,Segoe UI,Roboto,Ubuntu,Arial,sans-serif; color:var(--ink); background:linear-gradient(180deg,#0b1220,#0d1424 35%, #0b1220);}
    .wrap{max-width:880px;margin:32px auto;padding:16px}
    h1{font-size:clamp(20px,2.4vw,30px);margin:0 0 16px 0; font-weight:700; letter-spacing:.2px}
    p.sub{color:var(--muted); margin-top:4px}
    .row{display:grid; gap:14px; grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
    .card{background:var(--card); border:1px solid rgba(255,255,255,.06); border-radius:16px; padding:16px; box-shadow:0 6px 16px rgba(0,0,0,.25)}
    .card h2{font-size:16px;margin:0 0 12px 0; color:#d7e0f5; font-weight:600; letter-spacing:.3px}
    .btns{display:flex; gap:10px; flex-wrap:wrap}
    button{appearance:none; border:1px solid rgba(255,255,255,.12); background:#1a2640; color:var(--ink); padding:10px 14px; border-radius:12px; font-weight:600; cursor:pointer}
    button.primary{background:linear-gradient(180deg,#367cff,#1f5de6); border-color:#1f5de6}
    button:disabled{opacity:.6; cursor:not-allowed}
    .status{display:flex; align-items:center; gap:8px; color:var(--muted); font-size:14px}
    .dot{width:10px;height:10px;border-radius:50%;background:#7786a6}
    .dot.on{background:var(--ok)}
    .kv{display:grid; grid-template-columns: 1fr auto; gap:8px; align-items:center}
    .big{font-size: clamp(26px, 5vw, 48px); font-weight:800; letter-spacing: .5px}
    .unit{color:var(--muted); font-size:14px}
    .mono{font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace}
    .muted{color:var(--muted)}
    label{font-size:12px; color:var(--muted); display:block; margin-bottom:6px}
    input[readonly]{width:90%; padding:12px 12px; border-radius:12px; border:1px solid rgba(255,255,255,.12); background:#0f1627; color:var(--ink); font-size:18px}
    input[type='number']{width:90%; padding:12px 12px; border-radius:12px; border:1px solid rgba(255,255,255,.12); background:#0f1627; color:var(--ink); font-size:18px}
    select{width:100%; padding:12px 12px; border-radius:12px; border:1px solid rgba(255,255,255,.12); background:#0f1627; color:var(--ink); font-size:16px}
    .foot{margin-top:14px; font-size:12px; color:var(--muted)}
    .grid-3{display:grid; gap:14px; grid-template-columns: repeat(3, 1fr)}
    @media (max-width:760px){ .grid-3{grid-template-columns:1fr} }
    .toast{position:fixed; right:16px; bottom:16px; background:#0f1a2c; color:#e7ecf7; padding:10px 12px; border-radius:10px; border:1px solid rgba(255,255,255,.1); box-shadow:0 8px 22px rgba(0,0,0,.3); display:none}
    .license-inline{margin-top:12px; font-size:13px; line-height:1.6; color:var(--muted)}
  /* zielona kropka w przycisku BLE */
.bleDot{
  display:inline-block;
  width:10px;
  height:10px;
  border-radius:50%;
  margin-left:8px;
  background:#7cf29a;
  box-shadow:0 0 10px rgba(124,242,154,.55);
  vertical-align:middle;
}
.bleDot.off{
  background:#7786a6;
  box-shadow:none;
  opacity:.7;
}
#btnDisconnect {
  display: none !important;
}


/* ===== Compact Mobile Layout ===== */
@media (max-width: 640px){
  .wrap{max-width:480px; margin:0 auto; padding:8px}
  h1{margin-bottom:8px}
  .row{display:block}
  .card{padding:10px; border-radius:10px; margin-bottom:10px}
  .btns{gap:6px}
  button{padding:8px 10px; border-radius:8px; font-size:14px}
  input[readonly], input[type='number'], select, textarea{padding:8px 10px; font-size:14px}
  label{font-size:11px; margin-bottom:3px}
  .card h2{font-size:14px; margin-bottom:6px}
  .foot{font-size:11px; margin-top:8px}
  .big{font-size:26px}
  .status{font-size:12px}
  #log{max-height:160px}
}