* {box-sizing: border-box;}
.tab{display: none; width: 100%; height: 50%;margin: 0px auto;}
.current{display: block;}



/* Make circles that indicate the steps of the form: */
.step {height: 30px; width: 30px; cursor: pointer; margin: 0 2px; color: #fff; background-color: #bbbbbb; border: none; border-radius: 50%; display: inline-block; opacity: 0.8; padding: 5px}

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

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

.error {color: #f00; }