.formDiv {
    display: flex;
    justify-content: center;
}

#btn-div {
    display: flex;
    justify-content: center;
}

form input {
    border-style: none;
    outline: none;
    margin: 10px auto;
}

form input:enabled {
    border-style: none;
}

form span {
    font-weight: bold;
}