* {
     box-sizing: border-box;
   }
   
   body {
     width: 100%;
     height: 100vh;
     margin: 0;
     padding: 0;
     font-family: system-ui, sans-serif;
     color: black;
     background-color: white;
     display: grid;
     place-items: center;
     text-align: center;
   }
   
   .container {
     max-width: 480px;
     background-color: bisque;
     border-radius: 10px;
     padding: 30px;
     margin: 15px;
   }
   
   #output {
     background-color: black;
     color: white;
     padding: 10px;
     border-radius: 10px;
     font-weight: 700;
     font-size: 25px;
     text-align: end;
     margin-bottom: 20px;
   }
   
   input {
     width: 48%;
     padding: 10px;
     font-size: 20px;
     font-weight: 600;
   }
   
   .btns-container {
     margin-top: 20px;
   }
   
   .btns {
     width: 100%;
     padding: 10px 18px;
     margin: 10px;
     font-weight: 600;
     font-size: 16px;
   }
   
   #reset {
     background-color: coral;
   }
   
   footer a {
     text-decoration: none;
     color: grey;
   }