.heading{
  text-align: left;
  width: 100%;
  font-size: 2.5rem;
  line-height: 1.2;
}

.heading__line-left::after,
.heading__line-center::after,
.heading__line-right::after{
  content: "";
  display: block;
  width: 100px;
  height: 3px;
  left: 0;
  bottom: 0;
  margin-top: 20px;
}

.heading__line-center::after{
  margin-left: auto;
  margin-right: auto;
}

.heading__line-right::after{
  margin-left: auto;
}


.heading--left{
  text-align: left;
}

.heading--center{
  text-align: center;
}

.heading--right{
  text-align: right;
}