.btn, #startBtn, #continueBtn, #submitBtn, #riddleBlock button,
#playBtn, #finalLink button, #nameSubmitBtn, #usernameSubmit {
  background: transparent;
  border: 1px solid #444;
  color: #555;
  font-family: monospace;
  font-size: 0.75rem;
  letter-spacing: 2px;
  padding: 10px 26px;
  cursor: pointer;
  border-radius: 999px;
  transition: color 0.5s ease, border-color 0.5s ease;
}

.btn:hover, #startBtn:hover, #continueBtn:hover, #submitBtn:hover,
#riddleBlock button:hover, #playBtn:hover, #finalLink button:hover,
#nameSubmitBtn:hover, #usernameSubmit:hover {
  color: #999;
  border-color: #777;
}

#startBtn {
  padding: 20px 50px;
  background-color: #232323;
  border: 1px solid rgb(201, 194, 194);
  animation: flicker 4s infinite;
  position: relative;
  z-index: 1;
  opacity: 0.1;
}

.text-input, #answerInput, #nameInput, #usernameInput {
  background: transparent;
  border: none;
  border-bottom: 1px solid #444;
  color: #b0b0b0;
  font-family: monospace;
  font-size: 0.9rem;
  padding: 8px;
  text-align: center;
  outline: none;
  width: 260px;
}

#feedback, #thanksMsg, #usernameFeedback {
  color: #555;
  font-size: 0.75rem;
  min-height: 1em;
}