#mainBox {
    border: 1px solid gray;
    margin: auto;
    padding: 25px;
    width: 300px;
    background-color: white;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

#line {
    display: flex;
    padding: 5px;
    height: auto;
    margin: 0 auto;
    width: 300px;
}

#lineButton {
    padding-top: 25px;
    text-align: center;
}

#lineError {
    text-align: center;
    color:crimson;
    padding-top: 10px;
}

label {
    width: 125px;
}

h2 {
    margin: 50px;
    text-align: center;
}

#container {
    position: relative;
}