odoo/addons/website_forum/static/src/css/website_forum.css

.box {
  padding-left: 8px;
  padding-right: 8px;
  border-radius: 4px;
}
.box span {
  font-size: 200%;
  font-weight: bold;
}

.question div.pull-left {
  margin-right: 14px;
  min-width: 80px;
}
.question .question-name {
  font-size: 150%;
}

.oe_grey {
  background-color: #eeeeee;
}

.img-avatar {
  max-width: 50px;
  margin-right: 10px;
}

.forum_button {
  background-color : #df3f3f;
  color: white !important;
  margin-top: 10px;
  margin-bottom: 10px;
}

.badge-gold {
  color: #FFCC00
}

.badge-silver {
  color: #CCCCCC
}

.badge-bronze {
  color: #EEA91E
}

.speech-bubble {
  position: relative;
  background-color: #428bca;
  width: 200px;
  line-height: 150px;  
  color: white;
  text-align: center;
  border-radius: 25px;
}
.speech-bubble-bottom:after {
  content: '';
  position: absolute;
  border: 15px solid;
  border-top-color: #428bca;
  top: 100%;
  left: 70%;
}