:root {
  --bg: #15171b;
  --panel: #1f2329;
  --text: #e8e9ec;
  --muted: #9aa0a8;
  --ok: #2bb673;
  --bad: #c0392b;
  --warn: #e0a60b;
  --btn: #2c3340;
  --btn-on: #d7263d;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-user-select: none;
  user-select: none;
  overscroll-behavior: none;
}

header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid #000;
}
header .title { font-weight: 700; font-size: 18px; }
header .pills { display: flex; gap: 6px; flex: 1; flex-wrap: wrap; }

.pill {
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: #333;
  color: #fff;
}
.pill.on { background: var(--ok); }
.pill.off { background: var(--bad); }
.pill.warn { background: var(--warn); color: #000; }

.banner {
  background: var(--warn);
  color: #000;
  padding: 8px 16px;
  font-weight: 600;
}
.hidden { display: none !important; }

main {
  padding: 16px;
  display: grid;
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
}
.buttons .btn {
  --on: var(--btn-on);
  height: 160px;
  border: 0;
  border-radius: 14px;
  background: var(--btn);
  color: #fff;
  font-size: 28px;
  font-weight: 700;
  cursor: pointer;
  touch-action: none;
  box-shadow: inset 0 -4px 0 rgba(0,0,0,.35);
  transition: background .05s;
}
.buttons .btn:active { transform: translateY(1px); }
.buttons .btn.on { background: var(--on); box-shadow: 0 0 24px var(--on); }
.buttons .btn .mode { display: block; font-size: 12px; font-weight: 400; opacity: .7; margin-top: 6px; }
.buttons .empty { color: var(--muted); padding: 24px; text-align: center; }

.meters {
  display: grid;
  gap: 8px;
  background: var(--panel);
  padding: 12px;
  border-radius: 10px;
}
.meter { display: flex; align-items: center; gap: 10px; }
.meter span { width: 36px; font-size: 13px; color: var(--muted); }
.meter .bar { flex: 1; height: 12px; background: #000; border-radius: 6px; overflow: hidden; }
.meter .bar div { height: 100%; width: 0; background: linear-gradient(90deg, var(--ok) 70%, var(--warn) 90%, var(--bad)); transition: width .05s linear; }
.stats { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }

.settings {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  background: var(--panel);
  padding: 14px;
  border-radius: 10px;
}
.settings label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.settings select, .settings input[type=number], .settings input[type=password] {
  padding: 8px;
  border-radius: 6px;
  border: 1px solid #333;
  background: #0f1114;
  color: var(--text);
  font-size: 14px;
}
.settings input[type=range] { width: 100%; }

button.small {
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid #444;
  background: #2a2f38;
  color: var(--text);
  cursor: pointer;
  align-self: end;
}
button.connect {
  grid-column: 1 / -1;
  padding: 14px;
  border-radius: 8px;
  border: 0;
  font-size: 16px;
  font-weight: 700;
  background: var(--ok);
  color: #fff;
  cursor: pointer;
}
button.connect.connected { background: var(--bad); }

.log {
  grid-column: 1 / -1;
  margin: 0;
  max-height: 160px;
  overflow: auto;
  background: #0f1114;
  color: var(--muted);
  font-size: 11px;
  padding: 8px;
  border-radius: 6px;
  white-space: pre-wrap;
}

@media (max-width: 600px) {
  .buttons .btn { height: 120px; font-size: 22px; }
}