body{
    background-color: #3498db;

    

}
.container{
    max-width: 400px;
    margin: 110px auto;
    padding: 20px;
    background-color :#f2f2f2;;
    border: 2px solid #1e5f8a;
    border-radius: 5px;
    box-shadow: 2px 10px 10px rgba(0, 0, 0,0.2);


}

h2{
    margin-top: 0px;
    color:#000;
    text-align: center;
    text-decoration: underline;
}
form{
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}
label{
    font-size: large;
    font-weight: 600px;
    margin-bottom: 5px;
    color: #000;
}

input[type='number'],
select{

    width: 95%;
    padding: 10px;
    border: none;
    background: #fff;
    border-radius: 5px;
    box-shadow:0px 0px 5px rgba(0, 0, 0, 0.2);
    margin-bottom: 10px;
}

input[type='number']:focus,
select:focus
{
outline: none;
box-shadow: 0px 0px 5px #3498db;
}

select{
    width: 100%;
}

input[type='submit']{
    padding: 10px;
    margin-top: 10px;
    background-color: #3498db;
    border: none;
    border-radius: 3px;
    color: #fff;
    cursor: pointer;
    transition:background-color 0.s ease;
}
input[type='submit']:hover{
    background-color: #2187b5;
}
#result{
    font-weight: bold;
    margin-top: 20px;
    color:#3498db;
}