body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
}

.container {
    text-align: center;
    padding: 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
}

#toggleButton {
    padding: 15px 30px;
    font-size: 18px;
    font-weight: bold;
    color: white;
    background-color: #4CAF50;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#toggleButton.off {
    background-color: #f44336;
}

#toggleButton:hover {
    background-color: #45a049;
}

#toggleButton.off:hover {
    background-color: #da190b;
}

.timer {
    margin-top: 20px;
}

.timer h2 {
    font-size: 18px;
    margin-bottom: 10px;
}

#timerDisplay {
    font-size: 24px;
    font-weight: bold;
    color: #333;
}

@media (max-width: 600px) {
    .container {
        width: 90%;
        padding: 15px;
    }

    #toggleButton {
        padding: 10px 20px;
        font-size: 16px;
    }

    #timerDisplay {
        font-size: 20px;
    }
}