@import url('https://fonts.googleapis.com/css?family=Asap&display=swap');
*{
    padding:0;
    margin:0;
    box-sizing: border-box;
}

body {
background: black;
}

div{
    height:33.3vh;  
}
#fahrenheit{
    border-top: 4px solid white;
    border-bottom: 4px solid white;
}
input[type=number]{
    width:100%;
    height: 100%;
    background: black;
    color:white;
    font-size:100px;
    text-align:center;
    border: 0px;
    font-family: Asap,sans-serif;
    outline:none;
}

::-webkit-input-placeholder{/* chrome/safari/opera*/
    color:#222222;
}
::-ms-input-placeholder{ /* edge */
 color: #222222;
}
::-moz-placeholder{ /* firefox */
   color: #222222;
}