4skills.css

.skills-icons img {
  height: 4rem;
  width: 4rem;
  text-align: center;
}
.skills-icons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  text-align: center;
  row-gap: 2rem;
}
.icon img:hover {
  transform: scale(1.1);
  transition: 0.2s ease;
}
/* xs */
@media (min-width: 475px) {
}

/* sm */
@media (min-width: 640px) {
  .skills-icons {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* md */
@media (min-width: 768px) {
}

/* lg */
@media (min-width: 1024px) {
  .skills-icons {
    grid-template-columns: repeat(6, 1fr);
    margin-left: 9rem;
    margin-right: 9rem;
    padding-top: 3rem;
  }
  .skills-icons img {
    height: 5rem;
    width: 5rem;
  }
}
/* xl */
@media (min-width: 1280px) {
}

/* 2xl */
@media (min-width: 1536px) {
}