1 @media (max-width: 767px) 2  3 { 4   body{ 5     margin: 0; 6     padding: 0; 7   } 8 } 9 @media (max-width: 970px)10 {11   body{12     margin: 0;13     padding: 0;14   }container-fluid15 }16 @media (max-width: 480px)17 {18   body{19     margin: 0;20     padding: 0;21   }container-fluid22 }