* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}
body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #e0ebe0;
}

h1 {
  text-align: center;
  color: #262626;
  outline: none;
}

.icons {
  margin: 2rem 1rem;
  display: flex;
  width: 50vw;
  justify-content: space-evenly;
  align-items: center;
  flex-wrap: wrap;
}

.icons a {
  background: #e0e5ec;
  height: 60px;
  width: 60px;
  padding: 20px;
  text-decoration: none;
  display: inline-flex;
  border-radius: 50%;
  transition: all 0.3s ease;
  box-shadow: 6px 6px 12px #c5c5c5, -6px -6px 12px #ffffff;
}
.icons a:hover {
  box-shadow: inset 2px 2px 5px #bcbcbc, inset -2px -2px 5px #ffffff,
    2px 2px 5px #bcbcbc, -2px -2px 5px #ffffff;
}

i {
  font-size: 1.4rem;
}
a:hover i {
  transform: scale(0.9);
}
a:nth-child(3) {
  color: #d44638;
}

a:nth-child(1),
a:nth-child(4) {
  color: #333;
}
a:nth-child(2) {
  color: #0a66c2;
}

@media (max-width: 680px) {
  .icons {
    flex-direction: column;
    gap: 2rem;
  }
}