.apj-tts-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 0.35em;
  padding: 0.15em 0.4em;
  border: 1px solid #c9c9c9;
  border-radius: 999px;
  background: #f7f7f7;
  color: #333;
  font-size: 0.85em;
  line-height: 1;
  cursor: pointer;
  vertical-align: middle;
}
.apj-tts-btn:hover,
.apj-tts-btn:focus {
  background: #eee;
  outline: none;
}
.apj-tts-btn[aria-pressed="true"] {
  background: #e8f5e9;
  border-color: #81c784;
}
.apj-tts-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}