* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: transparent;
  color: #f0f0f0;
  font-family: Arial, Helvetica, sans-serif;
}

body { padding: 4px; }

.atmosphere-panel {
  width: 100%;
  max-width: 230px;
  padding: 12px 11px 8px;
  border: 1px solid #d7d7d7;
  background: #181818;
  font-size: 12px;
  line-height: 1;
}

.panel-heading,
.control-label {
  font-weight: 700;
  letter-spacing: 0.2px;
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.control-label { margin: 13px 0 9px; }

.status-led {
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  border: 1px solid #705a20;
  border-radius: 50%;
  background: #2c281d;
  box-shadow: none;
  transition:
    background 250ms ease,
    border-color 250ms ease,
    box-shadow 250ms ease;
}

.status-led.on {
  border-color: #f0cf69;
  background: #d6a92d;
  box-shadow: 0 0 5px rgba(214, 169, 45, 0.72);
}

.status-led.loading {
  border-color: #b89538;
  background: #806f39;
}

.status-led.glacial {
  animation: glacial-breathe 10s ease-in-out infinite;
}

@keyframes glacial-breathe {
  0%, 100% {
    opacity: 0.42;
    box-shadow: 0 0 2px rgba(214, 169, 45, 0.25);
  }
  50% {
    opacity: 1;
    box-shadow: 0 0 8px rgba(214, 169, 45, 0.9);
  }
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.control-button {
  min-height: 27px;
  padding: 5px 7px;
  border: 1px solid #bdbdbd;
  border-radius: 0;
  background: #181818;
  color: #f0f0f0;
  font: inherit;
  font-size: 10px;
  letter-spacing: 0.35px;
  cursor: pointer;
  transition: background 130ms ease, color 130ms ease;
}

.control-button:hover,
.control-button:focus-visible {
  border-color: #fff;
  outline: none;
}

.control-button.active {
  background: #f0f0f0;
  color: #111;
}

.control-button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.mode-help {
  min-height: 28px;
  margin-top: 9px;
  color: #8d8d8d;
  font-size: 8px;
  line-height: 1.35;
  letter-spacing: 0.25px;
}

.copyright {
  margin-top: 10px;
  color: #666;
  font-size: 8px;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-align: center;
  opacity: 0.8;
}

@media (max-width: 190px) {
  .atmosphere-panel {
    padding-left: 8px;
    padding-right: 8px;
  }

  .button-row { gap: 5px; }

  .control-button {
    padding-left: 3px;
    padding-right: 3px;
    font-size: 9px;
  }
}