#grid {
  height: 80vh;
  width: 80%;
  margin-left: auto;
  margin-right: auto;
  border: 0.5px solid lightslategray;
  display: grid;
  grid-template-columns: repeat(var(--columns), var(--item-size-c));
  grid-template-rows: repeat(var(--rows), var(--item-size-r));
  box-sizing: border-box;
  margin-top: 30px;
}
.grid-item {
  border: 0.5px solid lightslategray;
}
.heading {
  font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande',
    'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
  font-size: 40px;
  margin: 0 auto;
  max-width: max-content;
  position: relative;
  display: flex;
}
.heading + p {
  text-align: center;
  max-width: 80%;
  margin: 0 auto;
  font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande',
    'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}
span {
  transition: all 0.5s ease-in-out;
}
.empty-span {
  padding: 8px;
}
.heading::before {
  height: 2px;
  width: 0;
  content: '';
  bottom: 5px;
  background-color: red;
  position: absolute;
  transition: all 0.5s ease-in-out;
  opacity: 0;
}

.heading:hover::before {
  opacity: 1;
  width: 100%;
}