.material-viewer {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 15px;
    width:100%;
}
.material-viewer iframe {
    width: 100%;
    height: 80vh;
    border: none;
}
.chaptersaudio{
	width: 50%;
	float: left;
	padding: 20px;
	margin-bottom: 20px;
}
.chaptersaudio iframe{
	height: 200px !important;
}
.chaptersaudio h4 {
    font-size: 16px;
    margin-bottom: 10px;
    background: #3c3a3a;
    padding-left: 10px;
    color: #fff;
}
.chaptersinner {
    /* border: 1px solid #fabc16; */
    padding: 15px;
    border-radius: 15px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
}