First working with child themes in WP.
I created a new folder in themes folder with the name my-theme-name-child and placed style.css file which works.
Now, the original theme has a responsive stylesheet which is located in my-theme-name/css/layout.css how do I replicate this in my child theme?
I created the folder css in my child theme and created layout.css there like this:
@import url("../my-original-theme/css/layout.css");
@media only screen and (min-width: 769px)
#header {
padding: 20.618em 0 !important;
}