/* C6 Radiometer dashboard — dark, mobile-first, dependency-free.
   Accent = Awtrix yellow #FFF76B. Bands: green <0.30, amber 0.30–1.00, red >=1.00 µSv/h. */
:root{
  --bg:#0b0f14; --card:#121821; --card2:#0e141c; --line:#243140;
  --text:#e6edf3; --dim:#8aa0b3;
  --accent:#FFF76B;
  --green:#4ade80; --amber:#fbbf24; --red:#f87171; --redX:#ef4444;
  --r:12px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0}
body{
  background:var(--bg); color:var(--text);
  font:16px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,system-ui,sans-serif;
  min-height:100dvh; display:flex; flex-direction:column;
  padding-bottom:env(safe-area-inset-bottom);
}
b{font-weight:700}
.dim{color:var(--dim); font-size:12px}

/* ---- header / footer strips ---- */
.strip{
  position:sticky; top:0; z-index:5;
  display:flex; align-items:center; justify-content:space-between;
  flex-wrap:wrap; gap:8px; padding:9px 12px;
  background:rgba(11,15,20,.94); backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.strip-l{display:flex; align-items:center; gap:7px; font-size:15px}
.logo{color:var(--accent)}
.diy-link{color:var(--accent);font-size:11px;font-weight:700;text-decoration:none;padding:5px 7px;border-radius:6px}
.diy-link:hover,.diy-link:focus-visible{text-decoration:underline;outline:2px solid var(--accent);outline-offset:2px}
.strip-r{display:flex; flex-wrap:wrap; gap:6px; justify-content:flex-end}
.pill{
  font-size:11px; padding:3px 8px; border-radius:20px;
  background:var(--card2); border:1px solid var(--line); color:var(--dim);
  white-space:nowrap;
}
.pill.good{color:var(--green); border-color:#1c5233}
.pill.bad{color:var(--redX); border-color:#5b1f22}
.pill.stale{color:#0b0f14; background:var(--redX); border-color:var(--redX); font-weight:700}

main{flex:1; width:100%; max-width:560px; margin:0 auto; padding:14px 12px; display:flex; flex-direction:column; gap:12px}

/* ---- cards ---- */
.card{background:var(--card); border:1px solid var(--line); border-radius:var(--r); padding:14px}
.card-hd{display:flex; align-items:baseline; justify-content:space-between; gap:8px; font-size:13px; color:var(--dim); margin-bottom:10px}

/* ---- big readout ---- */
.readout{background:var(--card); border:1px solid var(--line); border-radius:var(--r); padding:16px 16px 18px; transition:border-color .2s,box-shadow .2s}
.rd-top{display:flex; align-items:center; justify-content:space-between}
.rd-lbl{color:var(--dim); font-size:13px; letter-spacing:.3px; text-transform:uppercase}
.rd-band{font-size:12px; font-weight:700; padding:2px 9px; border-radius:20px; text-transform:uppercase; letter-spacing:.5px}
.rd-main{display:flex; align-items:baseline; gap:10px; margin:6px 0 14px; line-height:1}
.val{font-size:15vw; font-weight:800; font-variant-numeric:tabular-nums; letter-spacing:-1px}
@media(min-width:480px){.val{font-size:72px}}
.unit{font-size:20px; color:var(--dim); font-weight:600}

.band-none .val{color:var(--text)}   .band-none .rd-band{background:var(--card2); color:var(--dim)}
.band-green .val{color:var(--green)}  .band-green .rd-band{background:#123222; color:var(--green)}
.band-amber .val{color:var(--amber)}  .band-amber .rd-band{background:#332708; color:var(--amber)}
.band-red   .val{color:var(--red)}    .band-red .rd-band{background:#3a1414; color:var(--red)}

.readout.alarm{border-color:var(--redX); box-shadow:0 0 0 1px var(--redX),0 0 26px rgba(239,68,68,.4)}
.readout.alarm .val{color:var(--redX); animation:pulse 1s ease-in-out infinite}
.readout.alarm .rd-band{background:var(--redX); color:#0b0f14}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}

/* ---- gauge (log 0.01→10 µSv/h) ---- */
.gauge{margin-top:4px}
.gauge-track{
  position:relative; height:12px; border-radius:7px; border:1px solid var(--line);
  /* zone stops: 0.30µSv/h≈49.2%, 1.00µSv/h≈66.7% on log 0.01..10 */
  background:linear-gradient(90deg,var(--green) 0 46%,var(--amber) 52% 64%,var(--red) 70% 100%);
}
.gauge-needle{
  position:absolute; top:-3px; width:3px; height:18px; border-radius:2px;
  background:var(--text); box-shadow:0 0 0 1px rgba(0,0,0,.6);
  transform:translateX(-1.5px); transition:left .3s ease;
}
.gauge-ticks{display:flex; justify-content:space-between; margin-top:4px; color:var(--dim); font-size:10px; font-variant-numeric:tabular-nums}

/* ---- sparkline ---- */
.spark-card{padding:12px 14px}
.spark{width:100%; height:52px; display:block}
.spark polyline{fill:none; stroke:var(--accent); stroke-width:2; stroke-linejoin:round; stroke-linecap:round}
.spark .dot{fill:var(--accent)}

/* ---- tiles ---- */
.tiles{display:grid; grid-template-columns:repeat(3,1fr); gap:8px}
@media(max-width:359px){.tiles{grid-template-columns:repeat(2,1fr)}}
.tile{background:var(--card); border:1px solid var(--line); border-radius:10px; padding:10px; display:flex; flex-direction:column; gap:2px; min-width:0}
.t-lbl{color:var(--dim); font-size:11px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
.t-val{font-size:22px; font-weight:700; font-variant-numeric:tabular-nums; line-height:1.1}
.t-u{color:var(--dim); font-size:11px}

/* ---- status chips ---- */
.chips{display:flex; flex-wrap:wrap; gap:6px}
.chip{font-size:12px; font-weight:600; padding:4px 10px; border-radius:20px; border:1px solid var(--line); background:var(--card2)}
.chip.ok{color:var(--green); border-color:#1c5233; background:#0d1a12}
.chip.info{color:#9fb0c4}
.chip.warn{color:var(--amber); border-color:#4a3a10; background:#241b06}
.chip.bad{color:var(--red); border-color:#5b1f22; background:#241010}
.chip.offline{color:#0b0f14; background:var(--redX); border-color:var(--redX); font-weight:800; letter-spacing:.3px}

/* ---- threshold ---- */
.thr-row{display:flex; align-items:center; gap:8px; flex-wrap:wrap}
.inp{
  width:110px; padding:9px 10px; font-size:15px; background:var(--card2); color:var(--text);
  border:1px solid var(--line); border-radius:8px; outline:none; font-variant-numeric:tabular-nums;
}
.inp:focus{border-color:var(--accent)}
.thr-u{color:var(--dim); font-size:13px}
.btn{
  padding:9px 16px; border-radius:8px; border:1px solid var(--accent);
  background:var(--accent); color:#0b0f14; font-weight:700; font-size:14px; cursor:pointer; min-height:38px;
}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.5; cursor:not-allowed}
.thr-note{margin-left:2px}

/* ---- footer ---- */
.foot{
  display:flex; flex-wrap:wrap; gap:6px 18px; justify-content:center;
  padding:12px; color:var(--dim); font-size:12px; border-top:1px solid var(--line);
}
.foot b{color:var(--text); font-weight:600; font-variant-numeric:tabular-nums}

@media(prefers-reduced-motion:reduce){
  .readout.alarm .val{animation:none}
  .gauge-needle,.readout{transition:none}
}