/* Bad naming */
.a {
  color: #343434;
}

.link {
  font-size: 24px;
}

.header-with-blue-background-color-and-shadow {
  background-color: blue;
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
}

/* Better naming */
.arrow {
  color: #343434;
}

.link-header {
  font-size: 24px;
}

.header-blue {
  background-color: blue;
}

.header-shadow {
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
}