body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #f6f9fc;
  color: #333;
}

header {
  text-align: center;
  background: #0077cc;
  color: white;
  padding: 1rem;
}

#status {
  margin-top: 0.5rem;
  font-size: 0.9rem;
}

#statusIcon {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 5px;
  vertical-align: middle;
}

.online {
  background-color: #4CAF50;
}

.offline {
  background-color: #f44336;
}

#currentData {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  padding: 1rem;
}

.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
  padding: 1rem;
  text-align: center;
  width: 100px;
}

.card .icon {
  font-size: 1.5rem;
  margin-bottom: 0.3rem;
}

.card .value {
  font-size: 1.2rem;
  font-weight: bold;
}

.card .label {
  font-size: 0.8rem;
  color: #666;
}

#tabs {
  text-align: center;
  margin: 1rem 0;
}

#tabs button {
  background: #0077cc;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  margin: 0 0.5rem;
  border-radius: 5px;
  font-size: 0.9rem;
}

#graphs {
  padding: 0 1rem;
}

canvas {
  max-width: 100%;
  margin-bottom: 1rem;
}

#actions {
  text-align: center;
  margin: 1rem;
}

#periodeSelect {
  padding: 0.4rem;
  border-radius: 5px;
  margin-right: 1rem;
}

#exportBtn {
  padding: 0.4rem 1rem;
  background: #0077cc;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}