.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
    clip: rect(0 0 0 0);
    overflow: hidden;
}

.advertisement {
	position: fixed;
    bottom: 0;
    left: 70px;
    width: 506px;
    cursor: pointer;
    z-index: 999;
}

.advertisement__container {
    position: relative;
	width: 100%;
}

.advertisement__close-button {
    position: absolute;
    top: 3px;
    right: 3px;
    display: block;
    width: 20px;
    height: 20px;
    background: url(https://fs.getcourse.ru/fileservice/file/download/a/5752/sc/508/h/f0d30261050346d9b4e75be4679c0336.svg) no-repeat center center !important;*//*белый*/
   /* background: url(https://fs.getcourse.ru/fileservice/file/download/a/5752/sc/67/h/1477169192eae0e289f64ef28a43248f.svg) no-repeat center center !important;/*черный*/
    border: none;
    padding: 0;
}

.advertisement__link {
	display: block;
}

.advertisement__img {
    display: block;
	max-width: 100%;
}


@media (max-width: 768px) {
	.advertisement {
    	bottom: 45px;
    	left: 0;
	}
}

@media (max-width: 506px) {
	.advertisement {
    	width: 100%;
	}
}