style.css

*
{
    margin:0;
    padding:0;
    box-sizing: border-box;
}
body
{
    margin-top: 30px;
    height:100vh ;
    width:100vw;
    display: flex;
    flex-direction: column;
    justify-content:flex-start;
    align-items:center;
    
}
#box
{
    width:40%;
    border-radius: 30px;
    box-shadow: rgba(0, 0, 0, 0.406) 0px 22px 70px 4px;
}
#main_div
{

    color: black;
    height:60%;   
}

#column{
    display: flex;
}
#row
{       
    font-weight: bold;
}
label
{
    font-weight: bold;
    margin: 1rem 3rem;
    font-size: large;

}
#headeris
{
    margin: 1rem;
    font-size: 2rem;
    text-align: center;
    font-weight: bold;
    height:16vh;
    margin-top: 20px;
}

#container
{
    margin-top: 20px;
    
}
input,select
{
    padding:3%;
    margin: 1rem 3rem;
    border-top: #000000;
    border-left: #000000;
    border-right: #000000;
}
#btn1
{
    
    margin: 20px 30px;
    padding:15px 55px;
    background-color: blue;
    color:white;
    font-weight: bold;
    border:none;
    font-size: 30px;
    border-radius: 15px;
    width: 450px;

}

#btn1:hover
{
    background-color: rgb(106, 106, 250);
    color: #000000;
}

#myresult{
    font-size: 2.5rem;
    text-align: center;
    margin-top: 31px;
}
#resultcontainer
{
    display: flex;
    justify-content:center;
    align-items: center;  
}
form{margin-top:20px;}