.text-muted {
  color: gray('600');
}

.text-center {
  text-align: center;
}

.o_thread_window {
  &,* {
    box-sizing: border-box;
  }
  .o_thread_window_header {
    height: 28px;
    .fa-close {
      text-decoration: none;
      font-weight: bold;
      &:before {
        content: "X";
      }
    }
    > span {
      margin: auto 0;
    }
  }
}