ant-design/components/button/style/index.less

@import "../../style/themes/default";
@import "../../style/mixins/index";
@import "./mixin";

@btn-prefix-cls: ~"@{ant-prefix}-btn";

// for compatibile
@btn-ghost-color        : @text-color;
@btn-ghost-bg           : transparent;
@btn-ghost-border       : @border-color-base;

// Button styles
// -----------------------------
.@{btn-prefix-cls} {
  .btn;
  .btn-default;

  &-primary {
    .btn-primary;

    .@{btn-prefix-cls}-group &:not(:first-child):not(:last-child) {
      border-right-color: @btn-group-border;
      border-left-color: @btn-group-border;

      &:disabled {
        border-color: @btn-default-border;
      }
    }

    .@{btn-prefix-cls}-group &:first-child {
      &:not(:last-child) {
        border-right-color: @btn-group-border;
        &[disabled] {
          border-right-color: @btn-default-border;
        }
      }
    }

    .@{btn-prefix-cls}-group &:last-child:not(:first-child),
    .@{btn-prefix-cls}-group & + & {
      border-left-color: @btn-group-border;
      &[disabled] {
        border-left-color: @btn-default-border;
      }
    }
  }

  &-ghost {
    .btn-ghost;
  }

  &-dashed {
    .btn-dashed;
  }

  &-danger {
    .btn-danger;
  }

  &-circle,
  &-circle-outline {
    .btn-circle(@btn-prefix-cls);
  }

  &:before {
    position: absolute;
    top: -1px;
    left: -1px;
    bottom: -1px;
    right: -1px;
    background: #fff;
    opacity: 0.35;
    content: '';
    border-radius: inherit;
    z-index: 1;
    transition: opacity .2s;
    pointer-events: none;
    display: none;
  }

  &&-loading {
    padding-left: 29px;
    pointer-events: none;
    position: relative;
    .@{iconfont-css-prefix} {
      margin-left: -14px;
      transition: all .3s @ease-in-out;
    }
    &:before {
      display: block;
    }
  }

  &-sm&-loading {
    padding-left: 24px;
    .@{iconfont-css-prefix} {
      margin-left: -17px;
    }
  }

  &-group {
    .btn-group(@btn-prefix-cls);
  }

  &:not(&-circle):not(&-circle-outline)&-icon-only {
    padding-left: 8px;
    padding-right: 8px;
  }

  // To ensure that a space will be placed between character and `Icon`.
  > .@{iconfont-css-prefix} + span,
  > span + .@{iconfont-css-prefix} {
    margin-left: 0.5em;
  }

  &-clicked:after {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    bottom: -1px;
    right: -1px;
    border-radius: inherit;
    border: 0 solid @primary-color;
    opacity: 0.4;
    animation: buttonEffect 0.48s ease-in-out forwards;
    display: block;
  }

  &-danger&-clicked:after {
    border-color: @btn-danger-bg;
  }

  &-background-ghost {
    background: transparent!important;
    border-color: #fff;
    color: #fff;
  }

  &-background-ghost&-primary {
    .button-variant-other(@primary-color; transparent; @primary-color);
  }
}

@keyframes buttonEffect {
  to {
    opacity: 0;
    top: -6px;
    left: -6px;
    bottom: -6px;
    right: -6px;
    border-width: 6px;
  }
}