odoo/addons/mail/static/src/css/mail.css

/* ------------------------------ */
/* Wall                           */
/* ------------------------------ */

.oe_mail_wall {
    overflow: auto;
    padding: 5px 5px 5px 5px;
    color: #4C4C4C;
}

.oe_mail_wall_search {
    width: 55%;
}

/* 2 columns view */
.oe_mail_wall_left {
    float: left;
    width: 65%;
}

.oe_mail_wall_right {
    float: right;
    width: 34%;
}

.oe_mail_wall_thread div.oe_mail_thread_act .oe_mail_action_textarea {
    width: 100%;
    height: 20px;
    padding: 2px;
}

/* ------------------------------ */
/* RecordThread                   */
/* ------------------------------ */

.oe_mail_recthread {
    overflow: auto;
    padding: 5px 5px 5px 5px;
}

/* Left-side CSS */
.oe_mail_actions {
    margin-bottom: 10px;
}

.oe_mail_followers {
    margin-bottom: 10px;
}

.oe_mail_followers_action, .oe_mail_followers_display {
}

/* RecordThread: 2 columns view */
.oe_mail_recthread_left {
    float: left;
    width: 55%;
}

.oe_mail_recthread_right {
    float: right;
    width: 35%;
}

.oe_mail_button_follow, .oe_mail_button_unfollow, .oe_mail_button_followers {
    width: 120px;
}

/* Subscribers */
.oe_mail_followers_vignette {
    float: left;
    width: 20%%;
}

.oe_mail_followers_vignette img {
    width: 80%;
}

/* ------------------------------ */
/* ThreadDisplay                  */
/* ------------------------------ */

.oe_mail_thread {
}

.oe_mail_thread_display, .oe_mail_thread_act {
    white-space: normal;
    margin-bottom: 5px;
    border-bottom: 1px solid #D2D9E7;
}

.oe_mail_thread_subthread {
    padding-left: 5%;
}

.oe_mail_thread_more {
    margin-left: 20%;
    margin-right: 40%;
    border: 1px solid #D2D9E7;
    text-align: center;
}

.notification {
    background: #E0E0E0;
}

.email {
    background: #E0E0E0;
}

.oe_mail_thread_msg:after, .oe_mail_thread_act:after {
  content: "";
  display: block;
  clear: both; 
}

.oe_mail_button_comment {
    width: 150px;
}

.oe_mail_action_textarea {
    height: 50px;
    padding: 5px;
}

.oe_mail_msg_image {
    float: left;
    width: 45px;
    height: 40px;
    text-align: center;
    overflow: hidden;
    -moz-border-radius: 3px;
    -webkit-border-radius: 3px;
    -o-border-radius: 3px;
    -ms-border-radius: 3px;
    border-radius: 3px;
    -moz-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
    -webkit-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
    -o-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
    -box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}

.oe_mail_msg_image img {
    width: 40px;
    height: auto;
    clip: rect(10px, 100px, 110px, 0px);
}

.oe_mail_msg_content {
    margin-left: 50px;
}

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

.oe_mail_msg_p_email_header {
    border-bottom: 1px solid #D2D9E7;
}

.oe_mail_msg_body a.reduce, .oe_mail_msg_body_short a.expand {
    color: #4E43E7;
}

.oe_mail_msg_author {
    color: #747474;
}

.oe_mail_msg_author a {
    color: #4E43E7;
}

.oe_mail_msg_need_action, .oe_mail_msg_need_action a {
    color: #C03000;
}

.oe_mail_msg_date {
    color: #747474;
}