how to apply media query in css code example

Example 1: css media queries

@media only screen and (max-width: 1200px){
    /*Tablets [601px -> 1200px]*/
}
@media only screen and (max-width: 600px){
	/*Big smartphones [426px -> 600px]*/
}
@media only screen and (max-width: 425px){
	/*Small smartphones [325px -> 425px]*/
}

Example 2: media query

@media only screen and (max-width: 600px) {
  body {
    background-color: lightblue;
  }
}

Example 3: minimum width of different devices in html

body {
  background: white;    
}

@media screen and (min-width: 980px) /* Desktop */ {
  body {
    background: red;
  }
}

@media screen  and (max-width: 979px) /* Tablet */ {
  body {
    background: blue;
  }
}

@media screen and (max-width: 500px) /* Mobile */ {
  body {
    background: green;
  }
}

Example 4: media query

@media only screen and (max-width: 600px) {
  body {
    // Change size, placement of elements
  }
}