.container {
  --active-color: #ee4f23;
  width: 40vw;
  height: 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.bar {
  width: 80%;
  height: 4px;
  background-color: #fff;
  position: relative;
}
.bar-progress {
  position: absolute;
  left: 0;
  right: 100%;
  top: 0;
  bottom: 0;
  background: var(--active-color);
  z-index: 3;
  transition: all 700ms;
}

.step {
  position: absolute;
  top: 50%;
  width: 28px;
  height: 28px;
  text-align: center;
  line-height: 22px;
  color: #666;
  border-radius: 50%;
  background-color: #fff;
  border-width: 3px;
  border-style: solid;
  border-color: #ccc;
  z-index: 4;
  transition: border 700ms ease-in;
}
.step.active {
  border-color: var(--active-color);
}

.step:nth-child(1) {
  transform: translate3d(-50%, -50%, 0);
}
.step:nth-child(2) {
  left: 33.333%;
  transform: translate3d(-50%, -50%, 0);
}
.step:nth-child(3) {
  left: 66.666%;
  transform: translate3d(-50%, -50%, 0);
}
.step:nth-child(4) {
  right: 0;
  transform: translate3d(50%, -50%, 0);
}

.btn-group {
  margin-top: 50px;
}
.btn {
  border: none;
  border-radius: 5px;
  padding: 6px 24px;
  cursor: pointer;
  color: #fff;
  background-color: var(--active-color);
}
.btn:last-child {
  margin-left: 10px;
}
.btn:active {
  transform: scale(0.97);
}
.btn.disabled {
  background-color: #aaa;
  cursor: not-allowed;
}