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

h1 {
    text-align: center;
  
}

input {
    padding: 10px;
    width: 100%;
    font-size: 17px;
   
    border: 1px solid #aaaaaa;
}
    /* Mark input boxes that gets an error on validation: */
    input.invalid {
        background-color: #ffdddd;
    }

button {
    background-color: #4487f5;
    color: #ffffff;
    border: none;
    padding: 10px 30px;
    cursor: pointer;
    font-size: 17px;
}

    button:hover {
        opacity: 0.8;
    }

#prevBtn {
    background-color: #bbbbbb;
}
/* Hide all steps by default: */
.tab {
    display: none;
}
/* Mark input boxes that gets an error on validation: */
input.invalid {
    background-color: #ffdddd;
}
/* 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: #ff6e40;
    }

#regForm h1 {
    font-size: 30px;
    margin-bottom: 40px;
}

.tab h3 {
    font-size: 15px;
    margin-bottom: 16px;
}
.tab p {
    margin-bottom: 25px;
}