body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
    padding: 20px;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 20px;
    transition: background-color 0.3s;
}

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

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

#video {
    border: 2px solid #333;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    display: none;
}