body{
    background:linear-gradient(to left,#7808f0,#06bdf5) ;
    line-height: 0.5;
}
h1{
    color:white;
    margin-top: 300px;
    margin-left: 280px;
    text-transform: uppercase;
    font-family: sans-serif;
    font-weight: 700px;
    font-size: 50;
    text-decoration: underline;
}

h2{
    color:white;
    margin-top: -1px;
    margin-left: 400px;
    font-family: sans-serif;
    
}
.calc
{
    width:500px;
    padding-top:100px;
    padding-bottom: 100px;
    position: absolute;
    top:50%;
    left:70%;
    transform: translate(-50%,-50%);
    transition: 0.25px;
    text-align: center;
}
#display_box
{
border:none;
background: white;
border-radius: 30px;
width:245;
font-size: 20;
font-family: sans-serif;
font-weight: 300;
height: 60;
margin:auto;
border: 2px solid white;
color: black;
}
.btn
{
    background-color: white;
    width:55;
    height:55;
    padding-top: -1;
    border: none;
    font-family: sans-serif;
    font-size: 20;
    font-weight: 300;
    border-radius: 300px;
    margin:1.5;
}
.glow
{
    width:55;
    height:55;
    padding-top: -1;
    border: none;
    font-family: sans-serif;
    font-size: 20;
    font-weight: 300;
    border-radius: 300px;
    margin:1.5;
    transition: 0.25px;
    cursor: pointer;
}
.glow:hover{
    background: #00d9ff;
}
#zero_no
{
    width:116;
    height:55;
    padding-top: -1;
    border: none;
    font-family: sans-serif;
    font-size: 20;
    font-weight: 300;
    border-radius: 300px;
    margin:1.5;
    background-color: white;
}