calculator.css

*{
    margin: 0;
    padding: 0;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    box-sizing: border-box;
}
.container{
    width: 100%;
    height: 100vh;
    background: #e3f9ff;
    display: flex;
    align-items: center;
    justify-content: center;
}
.calculator{
    background: #3a4452 ;
    padding: 20px ;
    border-radius: 10px;
   
    
}
.calculator form input{
    border: 0;
    outline: 0;
    width: 60px;
    height: 60px;
    border-radius: 10px;
    box-shadow: -8px -8px 15px rgba(255, 255, 255,0.1),5px 5px 15px rgba(0, 0, 0,0.2);
    background: transparent;
    font-size: 20px;
    color: #fff;
    cursor: pointer;
    margin: 10px;
}
 form .display{
    display: flex;
    justify-content: flex-end;
    margin: 20px 0;
 }
 form .display input{
    text-align: right;
    flex: 1;
    font-size: 45px;
    box-shadow: none;
 }
 form input.equal{
    width: 145px;
 }
 form input.operator{
    color: #33ffd8;
 }
 h1{
    border-bottom-style:dashed ;
    background:#e3f9ff ;
    text-align: center;
    padding: 2px;
    letter-spacing: 5px;
    color: black;
    font-family: sans-serif;
    font-weight: bold;
 }