body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f4;
    padding-top: 50px;
}

.btn {
    padding: 20px 40px;
    font-size: 20px;
    margin: 15px;
    border: none;
    cursor: pointer;
    color: white;
    border-radius: 8px;
    font-weight: bold;
    transition: 0.2s;
}

.on {
    background-color: #2ecc71;
}

.on:hover {
    background-color: #27ae60;
}

.off {
    background-color: #e74c3c;
}

.off:hover {
    background-color: #c0392b;
}

.com {
    background-color: #3498db;
}

.com:hover {
    background-color: #2980b9;
}

.valor-box {
    margin-top: 30px;
}

.valor-box p {
    font-size: 18px;
    color: #555;
    margin-bottom: 5px;
}

#valorNum {
    font-size: 48px;
    font-weight: bold;
    color: #2c3e50;
}