Bootstrap/less/buttons.less

// BUTTON STYLES
// -------------


// Colors
// ------

.btn {
  // Set text color
  &.primary,
  &.primary:hover,
  &.danger,
  &.danger:hover,
  &.success,
  &.success:hover,
  &.info,
  &.info:hover {
    text-shadow: 0 -1px 0 rgba(0,0,0,.25);
    color: @white
  }
  &.primary.active,
  &.danger.active,
  &.success.active,
  &.info.active {
    color: rgba(255,255,255,.75);
  }
  &.primary {
    .buttonBackground(@primaryButtonBackground, spin(@primaryButtonBackground, 20));
  }
  // Danger and error appear as red
  &.danger {
    .buttonBackground(#ee5f5b, #bd362f);
  }
  // Success appears as green
  &.success {
    .buttonBackground(#62c462, #51a351);
  }
  // Info appears as a neutral blue
  &.info {
    .buttonBackground(#5bc0de, #2f96b4);
  }
}

// Base styles
// -----------

.btn {
  // Button Base
  display: inline-block;
  padding: 4px 10px 4px;
  font-size: @baseFontSize;
  line-height: @baseLineHeight;
  color: @grayDark;
  text-align: center;
  text-shadow: 0 1px 1px rgba(255,255,255,.75);
  #gradient > .vertical-three-colors(@white, @white, 25%, darken(@white, 10%)); // Don't use .gradientbar() here since it does a three-color gradient
  border: 1px solid #ccc;
  border-bottom-color: #bbb;
  .border-radius(4px);
  @shadow: inset 0 1px 0 rgba(255,255,255,.2), 0 1px 2px rgba(0,0,0,.05);
  .box-shadow(@shadow);
  cursor: pointer;

  .ie7-restore-left-whitespace();

  &:hover {
    color: @grayDark;
    text-decoration: none;
    background-color: darken(@white, 10%);
    background-position: 0 -15px;

    // transition is only when going to hover, otherwise the background
    // behind the gradient (there for IE<=9 fallback) gets mismatched
    .transition(background-position .1s linear);
  }

  // Focus state for keyboard and accessibility
  &:focus {
    .tab-focus();
  }

  // Active and Disabled states
  &.active,
  &:active {
    background-image: none;
    @shadow: inset 0 2px 4px rgba(0,0,0,.15), 0 1px 2px rgba(0,0,0,.05);
    .box-shadow(@shadow);
    background-color: darken(@white, 10%);
    background-color: darken(@white, 15%) e("\9");
    color: rgba(0,0,0,.5);
    outline: 0;
  }
  &.disabled,
  &[disabled] {
    cursor: default;
    background-image: none;
    background-color: darken(@white, 10%);
    .opacity(65);
    .box-shadow(none);
  }

  // Button Sizes
  &.large {
    padding: 9px 14px;
    font-size: @baseFontSize + 2px;
    line-height: normal;
    .border-radius(5px);
  }
  &.large .icon {
    margin-top: 1px;
  }
  &.small {
    padding: 5px 9px;
    font-size: @baseFontSize - 2px;
    line-height: @baseLineHeight - 2px;
  }
  &.small .icon {
    margin-top: -1px;
  }
}

// Help Firefox not be a jerk about adding extra padding to buttons
button.btn,
input[type="submit"].btn {
  &::-moz-focus-inner {
  	padding: 0;
  	border: 0;
  }

  // IE7 has some default padding on button controls
  *padding-top: 2px;
  *padding-bottom: 2px;
  &.large {
    *padding-top: 7px;
    *padding-bottom: 7px;
  }
  &.small {
    *padding-top: 3px;
    *padding-bottom: 3px;
  }
}