body {
  font-family: Arial;
  background: #f4f6f8;
}

.container {
  width: 600px;
  margin: auto;
  background: #fff;
  padding: 30px;
  border-radius: 10px;
}

.progressbar {
  display: flex;
  justify-content: space-between;
  list-style: none;
  padding: 0;
  margin-bottom: 30px;
}

.progressbar li {
  width: 100%;
  text-align: center;
  position: relative;
  color: #aaa;
}

.progressbar li.active {
  color: green;
  font-weight: bold;
}

.step {
  display: none;
}

.step.active {
  display: block;
}

input {
  width: 100%;
  margin: 10px 0;
  padding: 8px;
}

button {
  padding: 10px 20px;
  margin-top: 10px;
  background: green;
  color: white;
  border: none;
  cursor: pointer;
}