adjust size of background image on mobile css code example

Example 1: Scaling Images and Videos css

.container {
  width: 50%;
  height: 200px;
  overflow: hidden;
}

.container img {
  max-width: 100%;
  height: auto;
  display: block;
}

Example 2: background shrinks when responsive

html,
body {
	width: 100%;
	height: 100%;
	margin: 0px;
	padding: 0px;
	overflow-x: hidden;
}