.sidebar[hidden],
main[hidden],
.login-screen[hidden] {
  display: none !important;
}

.attach-button {
  cursor: pointer;
  color: #77839a;
  font-size: 17px;
  padding: 3px 7px;
  border-radius: 5px;
}

.attach-button:hover { background: #f0efff; color: #6e5de4; }