redash/client/app/assets/less/inc/button.less

.btn {
    &:not(.btn-alt) {
        border: 0;
    }

    &[class*="bg-"]:not(.bg-white) {
        color: #fff;
    }

    .caret {
        margin-top: -3px;
    }

    &:not(.btn-link) {
        &:active,
        &.active,
        &:hover {

        }
    }
}

.btn-default {
    .button-variant(#333, #eee, transparent);
}

.btn-inverse {
    .button-variant(#fff, #454545, transparent);
}

.btn-link {
    color: #333;
}

.btn-icon {
    border-radius: 50%;
    width: 40px;
    height: 40px;
    padding: 0;
    text-align: center;

    .zmdi {
        font-size: 17px;
    }
}

.btn-icon-text {
    & > .zmdi {
        font-size: 15px;
        vertical-align: top;
        display: inline-block;
        margin-top: 2px;
        line-height: 100%;
        margin-right: 5px;
    }
}

.open .btn {
    outline: none !important;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0) !important;

    &:focus, &:active {
        outline: none !important;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0) !important;
    }
}

/** ALTERNATIVE BUTTONS **/
.btn-alt(@color) {
    border-color: @color;
    color: @color;

    &:not(.btn-white) {
        &:hover,
        &:active,
        &:focus {
            color: #fff;
            background: @color;
        }
    }

    &.btn-white {
        &:hover,
        &:active,
        &:focus {
            color: #333;
            background: @color;
        }
    }
}

.btn-alt {
    background: transparent;

    &.btn-default {
        .btn-alt(darken(@brand-default, 30%));
    }

    &.btn-info {
        .btn-alt(@brand-info);
    }

    &.btn-primary {
        .btn-alt(@brand-primary);
    }

    &.btn-success {
        .btn-alt(@brand-success);
    }

    &.btn-warning {
        .btn-alt(@brand-warning);
    }

    &.btn-danger {
        .btn-alt(@brand-danger);
    }
}

.btn-xs > .fa {
  font-size: 14px;
  top: 1px;
  position: relative;
}


.btn-default {
    background-color: fade(@redash-gray, 15%);
}

.btn-transparent {
    background-color: transparent !important;
}

.btn-default:hover, .btn-default:focus, .btn-default.focus, .btn-default:active, .btn-default.active, .open > .dropdown-toggle.btn-default {
    background-color: fade(@redash-gray, 25%);
}

.btn-default:active:hover, .btn-default.active:hover, .open > .dropdown-toggle.btn-default:hover, .btn-default:active:focus, .btn-default.active:focus, .open > .dropdown-toggle.btn-default:focus, .btn-default:active.focus, .btn-default.active.focus, .open > .dropdown-toggle.btn-default.focus {
    color: #333;
    background-color: fade(@redash-gray, 45%);
}