.o-mail-Chatter .o-mail-Message-body [summary~="o_mail_notification"] {
    display: none;
}

.o-chatter-disabled .o-mail-Message-actions {
    display: none;
}

.o-mail-Chatter-top {
    z-index: $o-mail-NavigableList-zIndex - 2;
    background-color: $o-webclient-background-color;

    &.shadow-sm {
        background-image: linear-gradient(90deg, transparent, $o-view-background-color, transparent);
    }
}

.o-mail-Chatter-recipientListButton:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

.o-mail-Followers-button:focus {
    background-color: $gray-200;
}

.o-mail-Followers-dropdown {
    /**
     * Note: Min() refers to CSS min() and not SCSS min().
     *
     * To by-pass SCSS min() shadowing CSS min(), we rely on SCSS being case-sensitive while CSS isn't.
     */
    max-width: Min(400px, 95vw);
    max-height: Min(500px, 50vh);
}

.o-mail-Follower-avatar {
    width: $o-mail-Avatar-sizeSmall;
    height: $o-mail-Avatar-sizeSmall;
}

.o-mail-Follower-details:hover,
.o-mail-Follower-action:hover {
    background-color: var(--chatter_follower-bg--hover, #{$o-gray-300});
}

.btn.o-mail-Chatter-follow:hover {
    color: $black !important;
}

.o-mail-Chatter button.o-active {
    color: $o-action !important;
}