body {
  background-color: #121212;
  color: aqua;
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
}

h1 {
  font-size: 3rem;
  margin-bottom: 20px;
}

.teclado {
  display: grid;
  grid-template-columns: repeat(4, 60px);
  gap: 15px;
  margin-bottom: 30px;
}

button {
  background-color: #1e1e1e;
  border: 2px solid aqua;
  color: aqua;
  font-size: 1.5rem;
  padding: 15px;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.2s;
}

button:hover {
  background-color: #00ffff33;
  transform: scale(1.05);
}

.reset-btn {
  background-color: transparent;
  border-color: red;
  color: red;
  margin-top: 10px;
}

.reset-btn:hover {
  background-color: #ff000033;
}