ui/app/styles/components/_button.scss

$btn-padding: 5px 15px;
$xs-padding: 2px 3px;
$sm-padding: 5px 10px;
$lg-padding: 18px 30px;

// -----------------------------------------------------------------------------
// This file contains all styles related to the button component.
// -----------------------------------------------------------------------------
.btn,
button,
[class^='btn-'] {
    display: inline-block;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    border: 0 solid transparent;
    padding: $btn-padding;
    border-radius: .25rem;
    letter-spacing: .5px;
    border-radius: 2px;
    line-height: 1.5;
    &.bg-transparent {
        color: $link-color;
    }
    &:hover {
        text-decoration: none;
    }
    &.has-label {
      text-align: left;
      padding: 5px 0 5px 15px;
      clear: both;

      .btn-label {
        @extend .pull-right;
        text-align: center;
        min-width:60px;
        padding: 5px 10px;
        border-radius : 0 3px 3px 0;
        background: rgba($accent-two, .3);
        margin-top: -5px;
      }

      .clip {
        max-width: calc(100% - 75px);
        display: inline-block;
        vertical-align: middle;
      }
    }

    &.more-actions {
        border: solid 1px $link-color;
        background: lighten($link-color,40);
    }
}


//icon button 
.icon-btn {
    padding: 0;
    i {
        background: $darken-helper;
        padding: 10px;
    }
    span {
        padding: 0 10px 0 5px;
        vertical-align: middle;
    }
}
//dropdown button
.dropdown-menu {
    max-width: 250px;
    &.hidden {
        display: none;
    }
    li {
        a {
            text-decoration: none;
        }
    }
}

//btn sizes
.btn-xs,
.btn-group-xs > .btn,
.btn-xs .btn-label {
    padding: $xs-padding;
    font-size: .65em;
}

.btn-sm,
.btn-group-sm .btn,
.btn-sm .btn-label {
    padding: $sm-padding;
    font-size: 0.87em;
    margin-left: -3px;
}

.btn-lg,
.btn-group-lg > .btn,
.btn-lg .btn-label {
    padding: $lg-padding;
    font-size: 1.25em;
}

//diabled
.btn-disabled,
.btn.disabled,
.btn[disabled],
fieldset[disabled] .btn {
    @extend .bg-disabled;
    cursor: not-allowed;

    &:hover {
        background: $bg-disabled;
    }
}

//button group
[class^='btn-group'] {
    position: relative;
    display: inline-block;
    vertical-align: middle;
    text-align: center;

    .btn,  .btn-xs{
        position: relative;
        display: inline-block;
        border-radius: 0;
        margin-left: -3px;

        &:first-child {
            border-radius: 3px 0 0 3px;
            margin-left: 0;
        }
        &:last-child {
            border-radius: 0 3px 3px 0;
        }
        &.active {
            @extend .bg-primary;
        }
        &:focus {
            z-index: 2;
        }
    }
    &.action-menu {
        .btn {
            font-size: .75em;
            margin-left: -6px;
            .dropdown {
                &:first-child {
                    margin-left: 0;
                }
                &:last-child {
                    position: relative;
                    &:before {
                        content: "";
                        background: rgba(0, 0, 0, .5);
                        position: absolute;
                        left: 0;
                        right: 0;
                        bottom: 0;
                        top: 0;
                    }
                }
            }
        }
    }
}

.copy-btn.small {
  color: inherit;
}