:root {
  --bg: #1a1a2e;
  --card: #16213e;
  --text: #e0e0e0;
  --accent: #0f3460;
  --green: #2ecc71;
  --red: #e74c3c;
  --yellow: #f1c40f;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: sans-serif;
  min-height: 100vh;
}

#top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--card);
  padding: 12px 24px;
  border-bottom: 2px solid var(--accent);
}

#top-bar .title {
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--text);
}

#top-bar .controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.connected {
  background-color: var(--green);
  animation: pulse 2s infinite;
}

.status-dot.disconnected {
  background-color: var(--red);
  animation: blink 1s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.7);
  }
  50% {
    opacity: 0.8;
    box-shadow: 0 0 0 6px rgba(46, 204, 113, 0);
  }
}

@keyframes blink {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.2;
  }
}

#gauges {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  padding: 24px;
}

#gauges svg {
  width: 180px;
  height: 180px;
}

#gauges .gauge-arc {
  fill: none;
  stroke-width: 12;
  stroke-linecap: round;
}

#gauges .gauge-arc-bg {
  stroke: var(--accent);
}

#gauges .gauge-arc-fill {
  stroke: var(--green);
  transition: stroke-dashoffset 0.5s ease;
}

#gauges .gauge-needle {
  stroke: var(--text);
  stroke-width: 2;
  stroke-linecap: round;
}

#gauges .gauge-value {
  fill: var(--text);
  font-size: 24px;
  font-weight: bold;
  text-anchor: middle;
}

#gauges .gauge-label {
  fill: var(--text);
  font-size: 12px;
  text-anchor: middle;
  opacity: 0.8;
}

#cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 24px;
}

#cards .card {
  background-color: var(--card);
  border-radius: 8px;
  padding: 16px;
  border: 1px solid var(--accent);
}

#cards .card .label {
  font-size: 0.85rem;
  color: var(--text);
  opacity: 0.7;
  margin-bottom: 4px;
}

#cards .card .value {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text);
}

#chart {
  width: 100%;
  height: 400px;
  background-color: var(--card);
  border-radius: 8px;
  margin: 0 24px 24px 24px;
  border: 1px solid var(--accent);
}

button {
  background-color: var(--accent);
  color: var(--text);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

button:hover {
  background-color: var(--bg);
  border-color: var(--text);
}

input {
  background-color: var(--card);
  color: var(--text);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s ease;
}

input:focus {
  border-color: var(--text);
}

@media (max-width: 768px) {
  #cards {
    grid-template-columns: 1fr;
  }

  #gauges {
    flex-direction: column;
  }

  #top-bar {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  #chart {
    margin: 0 12px 12px 12px;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  #cards {
    grid-template-columns: repeat(2, 1fr);
  }
}