.video_div {
    display: block;
    margin: 20px 30px 0 30px;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.3);
}

.intro_div {
    display: block;
    margin: 20px 30px 0 30px;
    padding: 10px 20px 20px 20px;
    width: 100%;
    text-indent: 32px;
    background-color: rgba(255, 255, 255, 0.3);
}

.intro_div ul {
    margin: 0 0 0 32px;
    text-indent: 0;
}

.download_div {
    display: block;
    margin: 20px 30px;
    padding: 10px 20px;
    width: 100%;
    text-indent: 32px;
    background-color: rgba(255, 255, 255, 0.3);
}

.download_button {
    font-weight: 400;
    margin: 20px auto;
    padding: 8px 20px;
    font-size: 17px;
}

@media (max-width: 600px) {
    .video_div {
        margin: 10px 10px 0 10px;
    }
    .intro_div {
        margin: 10px 10px 0 10px;
    }
    .download_div {
        margin: 10px;
    }
    .download_button {
        padding: 6px 16px;
        font-size: 15px;
    }
}