section :​<meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=yes">
Media queries examples :
@media only screen and (min-width:300px) and (max-width:480px){
.samplefile{
width:96%;
padding : 10px;
margin : 5px auto;
background-color: blue;
}
}
@media only screen and (min-width:1100px){
.samplefile{
width:96%;
padding : 10px;
margin : 5px auto;
background-color: gray;
}
}