* {
  margin: 0;
  padding: 0;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;

  height: 100vh;
  width: 100vw;

  font-family: Arial, Helvetica, sans-serif;
  background: white;
}

.progress-steps {
  --duration: 0.6s;
  display: flex;
  flex-direction: column;
}
.progress-steps .progress-container {
  position: relative;

  display: flex;
  justify-content: space-between;
  align-items: center;

  width: 500px;

  z-index: 0;
}

.progress-steps .progress-container .progress,
.progress-steps .progress-container .progress-back {
  position: absolute;
  height: 8px;
  width: 100%;

  z-index: -1;
}
.progress-steps .progress-container .progress {
  background-color: #1e90ff;

  transform: scale(0, 1);
  transform-origin: 0px center;
  transition: transform var(--duration) ease;
}
.progress-steps .progress-container .progress-back {
  background-color: hsl(0, 0%, 50%);
}

.progress-steps .progress-container .step {
  height: 30px;
  width: 30px;

  line-height: 30px;
  text-align: center;

  border-radius: 30px;
  background-color: hsl(0, 0%, 100%);
  border: 4px solid hsl(0, 0%, 50%);
  color: hsl(0, 0%, 50%);

  transition: border var(--duration) ease;
}

.progress-steps .progress-container .step.active {
  border: 4px solid #1e90ff;
}

.progress-steps .control {
  display: flex;
  justify-content: space-around;
  margin-top: 30px;
}
.progress-steps .control .btn {
  padding: 13px 20px;
  outline: none;
  border: none;

  border-radius: 5px;

  background-color: #1e90ff;
  color: white;
  font-size: 1.1rem;

  transition: background-color var(--duration) ease;
}
.progress-steps .control .btn.disabled {
  background-color: hsl(0, 0%, 50%);
}
.progress-steps .control .btn:active {
  transform: scale(0.98);
}