body {
  background-color: lightblue;
  font-family: Arial, sans-serif;
}

.device-tables {
  display: flex;
  gap: 40px;
  justify-content: center;
  margin-top: 20px;
}

.device-tables table {
  min-width: 300px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}