body {

    font-family: Arial, sans-serif;

    background-color: #f2f2f2;

    text-align: center;

    margin: 0;

    padding: 30px;

}

.contenedor {

    width: 900px;

    margin: auto;

}

video {

    border: 5px solid #333;

    border-radius: 10px;

}

.botones {

    margin-top: 20px;

}

button {

    padding: 10px 20px;

    margin: 5px;

    font-size: 16px;

    cursor: pointer;

}

#tiempo {

    font-size: 24px;

    margin-top: 20px;

    font-weight: bold;

}

#imagen {

    margin-top: 20px;

    width: 720px;

    border: 5px solid #333;

    border-radius: 10px;

}