span {font-size: 30 ; font-family:"arial" ; font-weight: normal; color:black;}
input {text-align: center; font-weight: 1000; font-family:"arial" ; font-size:16px;
background-color: white; color:red;
 }
 .btn {width: auto ; font-size:80%; color:red;
 }

 body {background-color: silver;}
 p {font-size:18px; font-family:"arial"; font-weight: 500; color:blue;
background-color: white;
 }

 p1 {font-size: 18px; font-family: "arial" ; color:blue; background-color: white; font-weight: bold;}
 p2 {font-size:18px; font-family:"arial"; font-weight: 500; color:red;
  background-color: white;
 }