Vmeda.Online/src/addon/messages/pages/discussion/discussion.scss

// Messages.
$item-message-bg: $gray-lighter !default;
$item-message-note-text: $gray-dark !default;
$item-message-note-font-size: 75% !default;
$item-message-mine-bg: $blue-light !default;


page-addon-messages-discussion {
    .addon-messages-discussion-container {
        display: flex;
        flex-direction: column;
        padding-bottom: 15px;
    }

    .addon-messages-date,
    .addon-messages-unreadfrom {
        margin-top: 10px;
    }

    .addon-messages-unreadfrom {
        color: $blue;
    }

    // Message item.
    .addon-message {
        max-width: 80%;
        border: 0;
        border-radius: 16px;
        padding: 10px;
        margin: 4px;
        background-color: $item-message-bg;
        align-self: flex-start;
        width: auto;
        min-height: 0;
        position: relative;
        @include core-transition(width);

        &.activated {
            background-color: darken($item-message-bg, 10%);
        }

        &.item-block .item-inner {
            border-bottom: 0;
            padding: 0;
            margin: 0;
        }

        .label {
            margin: 0;
            padding: 0;
        }

        .addon-message-text {
            display: inline-flex;
        }

        .note {
            align-self: flex-end;
            color: $item-message-note-text;
            font-size: $item-message-note-font-size;
            @include margin(null, null, null, 10px);
        }
        .addon-messages-delete-button {
            min-height: initial;
            line-height: initial;
            @include margin(0, 0, 0, 10px);
            height: auto;
            -webkit-align-self: flex-end;
            -ms-flex-item-align: end;
            align-self: flex-end;
            vertical-align: middle;

            .icon {
                font-size: 1.4em;
                line-height: initial;
            }
        }
    }

    // Defines when an item-message is the user's.
    .addon-message-mine {
        background-color: $item-message-mine-bg;
        align-self: flex-end;
        max-width: 80%;

        &.activated {
            background-color: darken($item-message-mine-bg, 10%);
        }

        .spinner {
            @include float(end);
            @include margin(2px, -3px, -2px, 5px);

            svg {
              width: 16px;
              height: 16px;
            }
        }
    }

    .addon-message .item-content,
    .addon-message-mine .item-content{
        background-color: transparent;
        padding: 0;
    }
}