* {
  box-sizing: border-box;
}

body {
  background-color: #f1f1f1;
}

#ptform {
  background-color: #ffffff;
  font-family: Roboto, sans-serif;
  margin: 50px auto;
  padding: 20px;
  width: 70%;
  border-radius: 0.3em;
  min-width: 300px;
}

h1,
h6 {
  text-align: center;
}

input {
  padding: 10px;
  width: 100%;
  font-size: 17px;
  font-family: Roboto;
  border: 1px solid #aaaaaa;
}

.okraj {
  border-radius: 0.6em;
  border: 0.5px solid black;
  margin: auto;
}

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

/* Hide all steps by default: */

.red {
  color: red;
  font-size: large;
}
/* Multi */
/* Hide all steps by default: */
.tab {
  display: none;
}

/* 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;
}

/* Mark input boxes that gets an error on validation: */
.kotrola.valid {
  background-color: green;
}

.kontrola.invalid {
  background-color: #ffdddd;
}