*{
   margin: 0;
	padding: 0;
    box-sizing: border-box;
}

body{
    background-color: gray;
}

#celcius{
   text-align: center;
    margin-top: 20px;
    margin-bottom: 2%;
    height: 20vh;
}

#fahrenheit{
   text-align: center; 
   margin-bottom: 2%;
    height: 20vh;
}

#kelvin{
   text-align: center; 
   margin-bottom: 2%;
    height: 20vh;
}

input[type=number]{
    width: 70%;
    height: 100%; 
    font-size: 70px;
    text-align:center;
    border: 0;
    font-family: monospace;
     border: 4px solid black;
    border-radius: 500px;
    outline: none;
}

::-webkit-input-placeholder{
    color: #394269;  
}

::-ms-input-placeholder{
    color: #394269;   
}

::-moz-placeholder{
    color: #394269;   
}