alfresco-ng2-components/lib/core/notifications/components/notification-history.theme.scss

@mixin adf-notification-history-theme($theme) {
    $background: map-get($theme, background);
    $accent: map-get($theme, accent);

    .adf {
        &-notification-history-menu_button.mat-button {
            margin-right: 0;
            border-radius: 90%;
            padding: 0;
            min-width: 40px;
            height: 40px;
        }

        &-notification-history-list .mat-subheader {
            justify-content: space-between;
        }

        &-notification-history-menu {
            &-item {
                cursor: pointer;
            }

            &-item:focus {
                outline: none;
                background: mat-color($background, 'hover');
            }

            &-item:hover {
                background-color: mat-color($background, 'hover');
            }

            &-message, &-no-message {
                font-size: 13px !important;
            }

            &-date {
                font-size: 12px !important;
            }

            &-initiator {
                margin: 4px;
            }

        }

        &-notification-initiator-pic {
            min-width: 40px;
            background: mat-color($accent);
            display: inline-block;
            height: 40px;
            border-radius: 100px;
            text-align: center;
            font-weight: bolder;
            font-size: 18px;
            text-transform: uppercase;
            vertical-align: middle;
            line-height: 40px;
            color: mat-color($mat-grey, 50);
        }

        &-notification-history-load-more {
            display: flex;
            justify-content: center;
            padding: 10px;
        }
    }

    .mat-menu-panel.adf-notification-history-menu {
        min-width: 320px;
        max-height: 500px;

        .mat-menu-content {
            padding: 0;
        }
    }
}