.message_box_empty {
        cursor: pointer;
        background: rgb(238, 237, 237);
        padding-bottom: 6px;
    }
    .message_box_empty:hover {
        background: rgb(230, 228, 228);
    }
    .message_box .message_box_avatar {
        float: left;
        width: 40px;
        -moz-border-radius: 3px;
            -webkit-border-radius: 3px;
            border-radius: 3px;
    }
    .message_box .message_box_title {
        margin-left: 50px;
    }
    .message_box .message_box_title span {
        display: inline-block;
        color: gray;
        margin-right: 15px;
    }
    .message_box .message_box_title b {
        color: blue;
        font: bold 16px OpenSansCondensed;
    }
    .message_list {
        margin: 10px 0;
        max-height: 400px;
        border-top: 1px solid #ccc;
        border-bottom: 1px solid #ccc;
        transform: rotate(180deg);
        direction: rtl;
        overflow-y: scroll;
        -ms-overflow-style: none;  /* Hide scrollbar for IE and Edge */
	    scrollbar-width: none;  /* Hide scrollbar for Firefox */
    }
    /* Hide scrollbar for Chrome, Safari and Opera */
    .message_list::-webkit-scrollbar {
        display: none;
    }
    .message_item {
        margin: 5px 0;
        transform: rotate(180deg);
        direction: ltr;
    }
    .message_item .message_item_avatar {
        float: left;
        width: 40px;
        -moz-border-radius: 3px;
            -webkit-border-radius: 3px;
            border-radius: 3px;
    }
    .message_item .message_item_content {
        margin: 0 0 0 50px;
        text-align: justify;
        font-family: 'LaTeX';
    }
    .message_item .message_item_photo {
        max-width: 100%;
        border: 0;
        margin: 10px 0;
    }
    .message_item .message_item_time {
        font-size: 12px;
        color: gray;
        margin-top: 5px;
    }
    .message_form {
        padding-bottom: 10px;
    }
    .message_form textarea {
        width: 100%;
        height: 40px;
		font-size: 13px;
        border: 1px solid #ccc;
        -moz-border-radius: 3px;
            -webkit-border-radius: 3px;
            border-radius: 3px;
    }
    .message_form textarea:focus {
        border: 1px solid #ddd;
    }
    .message_form .message_form_submit {
        margin-top: 0;
    }
    .message_form .imageupload {
        display: none;
    }
    .message_form .message_form_icon {
        float: left;
        margin-top: 0;
    }
    .message_form .message_form_icon img {
        border: 0;
        height: 34px;
    }
    .message_form .post_photo {
        display: inline-block;
        padding: 2px;
        background: #ccc;
        border: 1px solid #ddd;
        -moz-border-radius: 3px;
            -webkit-border-radius: 3px;
            border-radius: 3px;
    }
    
@media screen and (min-width: 800px) {
    .message_main {
        float: left;
        width: 600px;
    }
    .message_sidebar {
        float: right;
        width: 390px;
    }
}

@media screen and (max-width: 799px) {
    .message_sidebar {
        display: none;
    }
}