galaxy/Buttons/simontheonlyone_happy-baboon-60.html

<button class="button">
  <div class="container">
    <div class="folder folder_one"></div>
    <div class="folder folder_two"></div>
    <div class="folder folder_three"></div>
    <div class="folder folder_four"></div>
  </div>
  <div class="active_line"></div>
  <span class="text">File Explorer</span>
</button>
<style>
/* From Uiverse.io by simontheonlyone - Source: idea - Microsoft Windows File Explorer design;  made by me - Tags: tooltip, button, download, unique, file explorer */
.button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 5.3em;
  height: 5.3em;
  border: none;
  border-radius: .4em;
  background: rgba(235, 252, 254, 0.8);
}

.container {
  position: relative;
  width: 3.5em;
  height: 3.1em;
  background: none;
  overflow: hidden;
}

.folder {
  content: '';
  position: absolute;
  /* box-shadow: 0 0 5px rgba(0, 0, 0, .3); */
}

.folder_one {
  bottom: 0;
  width: 100%;
  height: 88%;
  border-radius: 3px;
  border-top: 2px solid rgb(206, 167, 39);
  /* background-color: rgb(252, 212, 80); */
  background: linear-gradient(
    -35deg,
    rgb(238, 194, 47) 5%,
    rgb(255, 223, 118));
}

.folder_two {
  top: 5%;
  width: 38%;
  height: 19%;
  border-top-left-radius: 3px;
  border-top-right-radius: 3px;
  border-bottom-right-radius: 3px;
  background-color: rgb(206, 167, 39);
  box-shadow: 0 1px 5px -2px rgba(0, 0, 0, .5);
}

.folder_two::before {
  content: '';
  position: absolute;
  display: inline;
  left: 88%;
  width: 0;
  height: 0;
  border-left: 7px solid rgb(206, 167, 39);
  border-top: .3em solid transparent;
  border-bottom: .3em solid transparent;
  /* background-color: rgb(206, 167, 39); */
}

.folder_three {
  display: flex;
  align-items: center;
  justify-content: center;
  left: .5em;
  bottom: 0;
  width: 2.5em;
  height: .9em;
  border-radius: 4px 4px 0 0;
  background: linear-gradient(
    -35deg,
    rgb(25, 102, 218),
    rgb(109, 165, 249));
  box-shadow: 0 0 5px rgba(0, 0, 0, .4);
}

.folder_four {
  left: 1em;
  bottom: .3em;
  width: 1.5em;
  height: .18em;
  border-radius: 1em;
  background-color: rgb(20, 77, 163);
  box-shadow: 0 0 10px rgba(0, 0, 0, .1);
}

.active_line {
  content: '';
  position: absolute;
  bottom: 0;
  width: .9em;
  height: .4em;
  background-color: #999;
  border: none;
  border-radius: 1em;
  transition: all .15s linear;
}

.button:active .active_line,
.button:focus .active_line {
  width: 2.3em;
  background-color: rgb(41, 126, 255);
}

.button:focus .container {
  animation: wow 1s forwards;
}

@keyframes wow {
  20% {
    scale: .8;
  }

  30% {
    scale: 1;
    transform: translateY(0);
  }

  50% {
    transform: translateY(-6px);
  }

  65% {
    transform: translateY(4px);
  }

  80% {
    transform: translateY(0);
  }

  100% {
    scale: 1;
  }
}

.text {
  content: '';
  position: absolute;
  top: -4.5em;
  width: 7.7em;
  height: 2.6em;
  background-color: #666;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  border: none;
  border-radius: 5px;
  text-shadow: 0 0 10px rgb(0, 0, 0);
  opacity: 0;
  transition: all .25s linear;
}

.button:hover .text {
  opacity: 1;
}
</style>