body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #333;
    color: #fff;
}

.container {
    text-align: center;
    padding: 20px;
    border-radius: 10px;
    background-color: #222;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

h1 {
    margin-bottom: 20px;
}

button {
    padding: 10px 20px;
    margin: 10px;
    font-size: 1.2em;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

#startButton {
    background-color: #28a745;
    color: white;
}

#startButton:hover:not(:disabled) {
    background-color: #218838;
}

#stopButton {
    background-color: #dc3545;
    color: white;
}

#stopButton:hover:not(:disabled) {
    background-color: #c82333;
}

button:disabled {
    background-color: #6c757d;
    cursor: not-allowed;
}