#regForm {
    background-color: #ffffff;
    margin: 100px auto;
    font-family: Raleway;
    padding: 40px;
    width: 70%;
    min-width: 300px;
}

/* Mark input boxes that gets an error on validation: */
input.invalid {
    background-color: #ffdddd;
}

/* Hide all steps by default: */
.tab {
    display: none;
}

#prevBtn {
    background-color: #bbbbbb;
}
/* Make circles that indicate the steps of the form: */
.step {
    height: 15px;
    width: 15px;
    margin: 0 2px;
    background-color: #bbbbbb;
    border: none;
    border-radius: 50%;
    display: inline-block;
    opacity: 0.5;
}

    .step.active {
        opacity: 1;
    }

    /* Mark the steps that are finished and valid: */
    .step.finish {
        background-color: #04AA6D;
    }