engine/public/stylesheets/admin/buttons.css

.button {
  display: inline-block;
  background: transparent url(/images/admin/buttons/dark-gray-left.png) no-repeat 0 0;
  padding: 0px 0px 0px 2px;
  font-size: 0.9em;
  color: white;
  cursor: pointer;
  border: none;
  height: 31px;
  outline: none;
}

.button span {
  display: inline-block;
  background: transparent url(/images/admin/buttons/dark-gray-right.png) no-repeat right top;
  position: relative;
  top: -1px;
  padding: 3px 9px 9px 4px;
  line-height: 21px;
  text-shadow: 1px 1px 1px #000;
  outline: none;
}

.button.light {
  background-image: url(/images/admin/buttons/light-gray-left.png);
  color: #787a89;
}

.button.light span {
  background-image: url(/images/admin/buttons/light-gray-right.png);
  text-shadow: 1px 1px 1px #fff;
}

.button.small {
  background: #ebedf4;
  outline: none;
  -moz-border-radius : 10px;
  -webkit-border-radius: 10px;
  height: 20px;
  font-size: 0.7em;
  padding: 0px 12px 0px 12px;
  color: #8B8D9A !important;
  text-decoration: none;
  text-shadow: 1px 1px 1px #fff;
}

.button.small.add {
}

.button.remove {
  color: #ff092c !important;
  font-size: 1.1em;
}

.button.remove:hover { text-decoration: underline; }