body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

button {
    padding: 15px 30px;
    font-size: 24px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #007bff;
    color: white;
    transition: background-color 0.3s;
}

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

video {
    display: block;
    width: 100%;
    height: auto;
    max-width: 640px;
    border: 2px solid #007bff;
    border-radius: 5px;
    margin: 20px auto;
}