4 hover-эффекта для полупрозрачных кнопок на чистом CSS

HTML

<div class="wrapper">
  <p class="holder">
    <a href="#" class="anim_btn effektA">Эффект A</a>
    <a href="#" class="anim_btn effektB">Эффект B</a>
    <a href="#" class="anim_btn effektC">Эффект C</a>
    <a href="#" class="anim_btn effektD">Эффект D</a>
  </p>
</div>

CSS

@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,300&subset=latin,cyrillic);
html, body, .wrapper {
  height: 100%;
}

body {
  background-image: linear-gradient(-123deg, #2d363d 0%, #677274 20%, #7a8485 28%, #9d9c98 61%, #c3b5a8 100%);
  font-family: 'Open Sans', sans-serif;
}

.wrapper {
  background-image: url(https://db.tt/NKFzzyVA);
  width: 100%;
}

.holder {
  position: absolute;
  top: 50%;
  height: 300px;
  width: 100%;
  margin-top: -170px;
}

a.anim_btn:link, a.anim_btn:visited {
  position: relative;
  display: block;
  max-width: 180px;
  width:100%;
  margin: 30px auto 0;
  padding: 14px 15px;
  border: 1px solid #fff;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  overflow: hidden;
  letter-spacing: .08em;
  text-shadow: 0 0 1px rgba(0, 0, 0, 0.2), 0 1px 0 rgba(0, 0, 0, 0.2);
  -webkit-transition: all .3s ease;
  -moz-transition: all .3s ease;
  -o-transition: all .3s ease;
  transition: all .3s ease;
}
a.anim_btn:link:after, a.anim_btn:visited:after {
  content: "";
  position: absolute;
  background: none repeat scroll 0 0 #fff;
  height: 0%;
  left: 50%;
  top: 50%;
  width: 100%;
  z-index: -1;
  -webkit-transition: all .3s ease 0s;
  -moz-transition: all .3s ease 0s;
  -o-transition: all .3s ease 0s;
  transition: all .3s ease 0s;
}
a.anim_btn:link:hover, a.anim_btn:visited:hover {
  color: #333;
  text-shadow: none;
}
a.anim_btn:link:hover:after, a.anim_btn:visited:hover:after {
  height: 420%;
}

a.anim_btn.effektA:after {
  -moz-transform: translateX(-50%) translateY(-50%) rotate(-45deg);
  -ms-transform: translateX(-50%) translateY(-50%) rotate(-45deg);
  -webkit-transform: translateX(-50%) translateY(-50%) rotate(-45deg);
  /* transform: translateX(-50%) translateY(-50%) rotate(-45deg); */
}
a.anim_btn.effektB:after {
  -moz-transform: translateX(-50%) translateY(-50%) rotate(45deg);
  -ms-transform: translateX(-50%) translateY(-50%)...