rounded corner boxes png background gradient border code example
Example: rounded gradient border css
div{
width: 300px;
height: 80px;
border: double 5px transparent;
border-radius: 30px;
background-image: linear-gradient(white, white), /*here must be*/
linear-gradient(to right, green, gold); /*both gradients*/
background-origin: border-box;
background-clip: content-box, border-box;
}