body {
  background-color: black;
  color: white;
  font-family: Arial, sans-serif;
  padding: 40px;
}

h1 {
  font-size: 48px;
  margin-bottom: 10px;
}

#countText {
  font-size: 18px;
}

hr {
  width: 300px;
  margin-left: 0;
}

.buttons {
  margin-top: 20px;
}

button {
  padding: 8px 20px;
  margin-right: 10px;
  border: none;
  cursor: pointer;
}

#increment {
  background-color: white;
}

#decrement {
  background-color: lightblue;
}

#clear {
  background-color: black;
  color: white;
  border: 1px solid white;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.error {
  color: red;
  margin-top: 10px;
}