body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f0f4f7;
  color: #333;
}

.container {
  max-width: 800px;
  margin: 50px auto;
  padding: 20px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
}

h1 {
  margin-bottom: 20px;
  color: #444;
}

h2 {
  margin-top: 30px;
  color: #444;
}

h3 {
  margin-top: 20px;
  color: #666;
  font-size: 1.2em;
}

.device {
  display: flex;
  justify-content: space-between;
  padding: 10px;
  border-bottom: 1px solid #ddd;
}

.device:last-child {
  border-bottom: none;
}

.device-status {
  font-weight: bold;
  padding: 5px 10px;
  border-radius: 5px;
}

.device-status.online {
  background-color: #00ff00; /* Bright green */
  color: #ffffff;
}

.device-status.offline {
  background-color: #ff0000; /* Bright red */
  color: #ffffff;
}

.admin-login {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  background: #007bff;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
}

.admin-login:hover {
  background: #0056b3;
}

button {
  padding: 10px 15px;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1em;
}

button:hover {
  background-color: #0056b3;
}

input, select {
  margin: 10px 0;
  padding: 10px;
  width: 100%;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1em;
}

form {
  margin-bottom: 20px;
}

p {
  margin-top: 10px;
  color: #555;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  margin: 5px 0;
  padding: 10px;
  background: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

li button {
  background: #ff4d4d;
}

li button:hover {
  background: #d93636;
}