body{
    background-color: #3498db;
}

.container{
    max-width: 400px;
    margin: 200px 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: 0;
    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;
}