body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
    margin: 0;
    text-align: center;
}

.container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
}

#connectButton {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 20px;
    transition: background-color 0.3s;
}

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

#data {
    display: flex;
    justify-content: space-around;
    gap: 20px;
    margin-top: 20px;
}

.sensor-card {
    background: #e9ecef;
    padding: 20px;
    border-radius: 8px;
    width: 150px;
}

.sensor-card h2 {
    margin: 0 0 10px;
    font-size: 18px;
}

.sensor-card p {
    font-size: 24px;
    font-weight: bold;
    color: #007bff;
    margin: 0;
}

#status {
    margin-top: 20px;
    color: #666;
}

.hidden {
    display: none;
}