body {
  font-family: Helvetica, Arial, sans-serif;
  margin: 20px;
  background: #f5f5f5;
  color: #222;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

#status-bar {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 20px;
}

.status-block {
  font-size: 18px;
}

.online {
  color: green;
  font-weight: bold;
}

.offline {
  color: crimson;
  font-weight: bold;
}

#plc-container {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.plc-box {
  background: white;
  border-radius: 10px;
  padding: 20px;
  width: 260px;
  box-shadow: 0 0 10px rgba(0,0,0,0.15);
}

.plc-image {
  margin: 10px 0;
}

.plc-image img {
  width: 200px;
  height: auto;
  display: block; /* will center image */
  margin: 0 auto;
}

.row {
  margin: 10px 0;
}

.row label {
  display: inline;
  width: 40px;
}

button {
  padding: 5px 10px;
  margin-left: 5px;
  cursor: pointer;
}

input[type="number"] {
  width: 100px;
}

.data-row {
  margin-top: 15px;
  font-size: 32px;
}