:root {
  --bs-btn-active-bg: var(--bs-tertiary-color);
}

.entry-button {
    width: 170px;
    height: 170px;
    transition: 0.2s;
    background-color: #ffffff;
    &:hover, &:active, &:target, &:focus {
      background-color: var(--bs-tertiary-color);
      filter: brightness(90%);    
  }
}

.btn:first-child:active, .btn:first-child:target, .btn:first-child:focus {
	background-color: var(--bs-tertiary-color);
}