<button class="progress-button" data-style="rotate-angle-bottom" data-perspective data-horizontal>Submit</button>

<button class="progress-button" data-style="rotate-angle-bottom" data-perspective data-horizontal>
  <span class="progress-wrap">
  <span class="content">Submit</span>
  <span class="progress">
  <span class="progress-inner"></span>
  </span>
  </span>
</button>

<button class="progress-button" data-style="fill" data-horizontal>
  <span class="content">Submit</span>
  <span class="progress">
  <span class="progress-inner"></span>
  </span>
</button>

*, *:after, *::before { box-sizing: border-box; }
   
@font-face {
  font-weight: normal;
  font-style: normal;
  font-family: 'icomoon';
  src:url('../fonts/icomoon/icomoon.eot');
  src:url('../fonts/icomoon/icomoon.eot?#iefix') format('embedded-opentype'),
  url('../fonts/icomoon/icomoon.ttf') format('truetype'),
  url('../fonts/icomoon/icomoon.woff') format('woff'),
  url('../fonts/icomoon/icomoon.svg#icomoon') format('svg');
}
   
.progress-button {
  position: relative;
  display: inline-block;
  padding: 0 60px;
  outline: none;
  border: none;
  background: #1d9650;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 1em;
  line-height: 4;
}
   
.progress-button[disabled],
.progress-button[disabled].state-loading {
  cursor: default;
}
   
.progress-button .content {
  position: relative;
  display: block;
}
   
.progress-button .content::before,
.progress-button .content::after {
  position: absolute;
  right: 20px;
  color: #0e7138;
  font-family: "icomoon";
  opacity: 0;
  transition: opacity 0.3s 0.3s;
}
   
.progress-button .content::before {
  content: "\e600"; /* Checkmark for success */
}
   
.progress-button .content::after {
  content: "\e601"; /* Cross for error */
}
   
.progress-button.state-success .content::before,
.progress-button.state-error .content::after {
  opacity: 1;
}
   
.notransition {
  transition: none !important;
}
   
.progress-button .progress {
  background: #148544;
}
   
.progress-button .progress-inner {
  position: absolute;
  left: 0;
  background: #0e7138;
}
   
.progress-button[data-horizontal] .progress-inner {
  top: 0;
  width: 0;
  height: 100%;
  transition: width 0.3s, opacity 0.3s;
}
   
.progress-button[data-vertical] .progress-inner {
  bottom: 0;
  width: 100%;
  height: 0;
  transition: height 0.3s, opacity 0.3s;
}
   
/* Necessary styles for buttons with 3D transforms */
   
.progress-button[data-perspective] {
  position: relative;
  display: inline-block;
  padding: 0;
  background: transparent;
  perspective: 900px;
}
   
.progress-button[data-perspective] .content {
  padding: 0 60px;
  background: #1d9650;
}
   
.progress-button[data-perspective] .progress-wrap {
  display: block;
  transition: transform 0.2s;
  transform-style: preserve-3d;
}
   
.progress-button[data-perspective] .content,
.progress-button[data-perspective] .progress {
  outline: 1px solid rgba(0,0,0,0); /* Smoothen jagged edges in FF */
}