.tab{display: none; width: 100%; height: 50%;margin: 0px auto;}
.current{display: block;}
.previous {background-color: #bbbbbb; }
.step {text-align: center;}
/* Make circles that indicate the steps of the form: */

/*.step.active {opacity: 1; background-color: #69c769;}*/

/*.step.finish {background-color: #4CAF50; }*/

.error {color: #f00; }