Bootstrap/lib/buttons.less

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

// Shared colors for buttons and alerts
.btn,
.alert-message {
  // Set text color
  &.danger,
  &.danger:hover,
  &.error,
  &.error:hover,
  &.success,
  &.success:hover,
  &.info,
  &.info:hover {
    text-shadow: 0 -1px 0 rgba(0,0,0,.25);
    color: @white
  }
  // Danger and error appear as red
  &.danger,
  &.error {
    .gradientBar(#ee5f5b, #c43c35);
  }
  // Success appears as green
  &.success {
    .gradientBar(#62c462, #57a957);
  }
  // Info appears as a neutral blue
  &.info {
    .gradientBar(#5bc0de, #339bb9);
  }
}

// Base .btn styles
.btn {
  // Button Base
  display: inline-block;
  padding: 5px 10px 6px;
  font-size: @baseFontSize;
  line-height: normal;
  color: #333;
  text-shadow: 0 1px 1px rgba(255,255,255,.75);
  #gradient > .vertical-three-colors(#ffffff, #ffffff, 25%, darken(#ffffff, 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;

  &:hover {
    color: @grayDark;
    text-decoration: none;
    background-position: 0 -15px;
  }

  // Focus state for keyboard and accessibility
  &:focus {
    outline: 1px dotted #666;
  }

  // Primary Button Type
  &.primary {
    color: @white;
    text-shadow: 0 -1px 0 rgba(0,0,0,.25);
    .gradientBar(@blue, @blueDark)
  }

   // Transitions
  .transition(.1s linear all);

  // Active and Disabled states
  &.active,
  &:active {
    @shadow: inset 0 2px 4px rgba(0,0,0,.25), 0 1px 2px rgba(0,0,0,.05);
    .box-shadow(@shadow);
  }
  &.disabled {
    cursor: default;
    background-image: none;
    .reset-filter();
    .opacity(65);
    .box-shadow(none);
  }
  &[disabled] {
    // disabled pseudo can't be included with .disabled
    // def because IE8 and below will drop it ;_;
    cursor: default;
    background-image: none;
    .reset-filter();
    .opacity(65);
    .box-shadow(none);
  }

  // Button Sizes
  &.large {
    padding: 9px 14px 9px;
    font-size: @baseFontSize + 2px;
    line-height: normal;
    .border-radius(6px);
  }
  &.small {
    padding: 7px 9px 7px;
    font-size: @baseFontSize - 2px;
  }
}
// Super jank hack for removing border-radius from IE9 so we can keep filter gradients on alerts and buttons
:root .alert-message,
:root .btn {
  border-radius: 0 \0;
}

// 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;
  }
}