styles.css

* {
  box-sizing: border-box;
  transition: all 0.25s ease-in-out;
  margin: 0;
}

body {
  font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
  background-color: rgb(59, 59, 64);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btns-container {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: rgb(255, 255, 255);
  font-weight: 600;
  font-size: 1.125rem;
}

.btns-container .btn {
  cursor: pointer;
  margin: 0.8em;
  width: 18rem;
  display: flex;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.btn::after {
  position: absolute;
  content: "";
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: inherit;
  z-index: -2;
}

.btn:hover::after {
  filter: brightness(65%);
}

.btn--read:hover::after {
  filter: saturate(190%);
}

.btn--search {
  background-color: rgb(136, 136, 252);
}

.btn--read {
  background-color: rgb(237, 111, 100);
}

.btn--email {
  background-color: rgb(222, 107, 237);
}

.btn--phone {
  background-color: rgb(65, 156, 110);
}

.btn__body {
  margin: auto;
}

.btn__item {
  padding: 1em 1.5em;
  text-align: center;
  background-color: rgba(0, 0, 0, 0.2);
}

.btn__icon {
  min-width: 1.225rem;
}

.btn--read:hover .btn__icon {
  animation-name: movement;
  animation-duration: 650ms;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in-out;
}
@keyframes movement {
  100% {
    transform: translateX(30%);
  }
}

.btn--search:hover .btn__icon {
  transform: scale(1.5);
}

.btn--email:hover .btn__icon {
  transform: skewX(-30deg);
}

.btn--phone:hover .btn__icon {
  animation-name: rotation;
  animation-duration: 650ms;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in-out;
}
@keyframes rotation {
  100% {
    transform: rotate(30deg);
  }
}