#pf-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.9);
  align-items: center;
  justify-content: center;
}

#pf-box {
  background: #fff;
  color: #000;
  padding: 2rem;
  border-radius: 6px;
  max-width: 34rem;
  width: 90%;
  text-align: center;
}

.pf-step {
  color: #666;
  font-size: 0.85rem;
  text-transform: uppercase;
}

.pf-prompt {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  /* the prompt cannot be selected: a copied question is easily searched online */
  user-select: none;
  -webkit-user-select: none;
}

.pf-input {
  width: 100%;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  resize: none;
}

.pf-counter {
  font-size: 0.85rem;
  color: #666;
  margin-bottom: 0.5rem;
}

.pf-counter-short {
  color: #b00;
}

.pf-timer {
  font-size: 1.5rem;
  font-weight: bold;
}

.pf-button {
  padding: 0.5rem 1.5rem;
  border: 0;
  border-radius: 4px;
  background: #3b5998;
  color: #fff;
}