Mailspring/static/buttons.less

@import "ui-variables";
@import "ui-mixins";

button, html input[type="button"] {
  cursor: default;
  &:hover, &:active {
    cursor: default;
  }
}

.btn {
  padding: 0.33em 1em;
  border:1px solid rgba(0,0,0,0.15);
  border-radius: @border-radius-base;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.15);
  cursor: default;
  display:inline-block;
  background: linear-gradient(to top, rgba(241,241,241,0.75) 0%, rgba(253,253,253,0.75) 100%);

  height: auto;
  line-height: 1;

  &:active {
    cursor: default;
    background-color: darken(@btn-default-bg-color, 9%);
    box-shadow: 0 -1px 1px rgba(0, 0, 0, 0.21);
  }
  &:focus {
    outline: none
  }

  font-size: @font-size-base;
  &.btn-smaller {
    font-size: @font-size-smaller;
  }
  &.btn-small {
    font-size: @font-size-small;
  }
  &.btn-large {
    font-size: @font-size-large;
    padding: 0.5em 1.3em;
  }
  &.btn-larger {
    font-size: @font-size-larger;
    padding: 0.66em 1.6em;
  }

  color:      @btn-default-text-color;
  background: @btn-default-bg-color;
  img.content-mask { background-color:@btn-default-text-color; }

  &.btn-action {
    color:      @btn-action-text-color;
    background: @btn-action-bg-color;
    img.content-mask { background-color:@btn-action-text-color; }
  }

  &.btn-emphasis {
    position: relative;
    color: @btn-emphasis-text-color;
    font-weight: @font-weight-medium;

    img.content-mask { background-color:@btn-emphasis-text-color; }

    background: linear-gradient(to bottom, #6bb1f9 0%, #0a80ff 100%);

    border: 0;
    &:before {
      content: ' ';
      width: calc(~"100% + 2px");
      height: calc(~"100% + 2px");
      border-radius: 5px;
      padding: 0;
      top: -1px;
      left: -1px;
      position: absolute;
      z-index: -1;
      background: linear-gradient(to bottom, #4ca2f9 0%, #015cff 100%);
    }
  }

  &.btn-emphasis:active {
    background-image: -webkit-gradient(linear, left top, left bottom, from(darken(@btn-emphasis-bg-color,10%)), to(darken(@btn-emphasis-bg-color, 4%)));
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.21);
  }

  &.btn-text {
    font-size: 13px;
    padding: 2px 14px 2px 7px;
    .text {
      position: relative;
      top: 1px;
      margin-left: 6px;
    }
  }

  &.btn-danger, .btn-destructive {
    color:      @btn-danger-text-color;
    background: @btn-danger-bg-color;
    img.content-mask { background-color:@btn-danger-text-color; }
  }
}

.btn-toolbar {
  height: 24px;
  padding: 2px 13px;
  &.narrow {
    padding: 2px 9px;
  }
}

.btn-gradient {
  background: -webkit-gradient(linear, left top, left bottom, from(@btn-default-bg-color), to(darken(@btn-default-bg-color, 4.5%)));
}
.btn-gradient:active {
  background: -webkit-gradient(linear, left top, left bottom, from(darken(@btn-default-bg-color, 9%)), to(darken(@btn-default-bg-color, 13.5%)));
}

.btn-icon {
  background: transparent;
  border: 0;
  box-shadow: none;
  color: @text-color-subtle;
  img.content-mask { background-color:@text-color-subtle; }
  margin-right: 10px;
  outline: none !important;
  font-size: 20px;

  &:last-child {
    margin-right: 0;
  }

  &.inverse {
    color: @text-color-inverse;
    img.content-mask { background-color:@text-color-inverse; }

    &:hover {
      color: white;
    }

    &:active {
      color: @text-color-inverse;
      img.content-mask { background-color:@text-color-inverse; }
    }
  }

  &:hover {
    cursor: default;
    color: @text-color-link;
    img.content-mask { background-color:@text-color-link; }
    box-shadow: none;
  }
  &:active {
    color: @text-color-link-active;
    img.content-mask { background-color:@text-color-link-active; }
    box-shadow: none;
  }
}