.fb__arc {
  margin-bottom: 10px;
}

.fb__arc_headline {
  background-color: #f7f7f8;
  cursor: pointer;
  padding: 1em;
  width: 100%;
  text-align: left;
  border: none;
  outline: none;
  transition: 0.4s;
  display: flex;
  justify-content: space-between;
}

.active .fb__arc_headline, .fb__arc_headline:hover {
  background-color: #f0f0f1;
}

.fb__arc_content {
  padding: 1em;
  background-color: #f7f7f8;
  display: none;
  overflow: hidden;
}

.fb__arc_headline:after {
  content: '\02795';
  font-size: 13px;
  float: right;
  margin-left: 5px;
}

.active .fb__arc_headline:after {
  content: "\2796";
}