wagtail/client/scss/components/_bulk_actions.scss

.bulk-actions-filter-checkbox {
    .table-headers & {
        > div {
            display: flex;
            align-items: center;
        }

        .c-dropdown__button {
            padding-left: 0.3rem;
        }

        .bulk-actions-choices,
        .bulk-actions-choices > ul {
            display: flex;
            align-items: center;
        }

        .bulk-actions-choices li {
            margin: 0 0.5em;
        }

        .bulk-actions-choices span {
            text-transform: none;
        }
    }
}


.bulk-actions-choices {
    &.footer {
        @include transition(transform 0.1s ease 0.1s);

        &.hidden {
            transform: translateY(200px);
            visibility: hidden;
        }

        .button {
            font-weight: 600;
        }

        .bulk-actions-more {
            .button {
                border: 0;
            }

            .button:not(:hover) {
                color: $color-teal;
            }

            .c-dropdown__button {
                text-transform: uppercase;
            }

            &.is-open {
                .c-dropdown__menu.u-toggle {
                    display: flex;
                }
            }

            .c-dropdown__menu {
                bottom: 50px;
                flex-direction: column;
            }
        }
    }

    .footer__container {
        display: flex;
        justify-content: space-around;
        width: 100%;
        align-items: center;
        padding: 1.25em;
        border-radius: 4px 4px 0 0;
        margin-left: 30px;

        input[type="checkbox"] {
            margin-right: 1.25em;
        }

        .bulk-actions-buttons {
            border-left: 1px solid $color-grey-2;
            padding-left: 1.5em;

            .bulk-action-btn {
                max-width: 160px;
                overflow-x: hidden;
                text-overflow: ellipsis;
            }
        }

        .num-objects {
            text-transform: none;
            margin: 0 5px;
        }

        .num-objects-in-listing {
            color: $color-teal-light;
            background-color: transparent;
            border: 0;
            font-family: Open Sans, Arial, sans-serif;
            padding: 0;
        }

        .button:not(:hover) {
            background-color: $color-white;
        }
    }
}