body {
  background: #0b0b0f;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  font-family: Arial, sans-serif;
}

.calculator {
  background: #1a1a2e;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
  width: 90%;
  max-width: 300px;
}

#display {
  box-sizing: border-box;
  padding: 10px;
  width: 100%;
  height: 70px;
  font-size: 24px;
  margin-bottom: 10px;
  text-align: right;
  border: none;
  border-radius: 10px;
  background: #0b0b0f;
  color: white;

}

.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

button {
  height: 60px;
  font-size: 1.2rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  background: #2a2a40;
  color: white;
  transition: 0.2s;
}

button:hover {
  background: #7c3aed;
  transform: scale(1.05);
}

.operacao {
  background: #5a2ea6;
}

button .operacao {
  background: #9f67ff;
}

#ponto {
  background: #7c3aed;
}

#ponto:hover {
  background: #a78bfa;
}

.zero {
  grid-column: span 2;
}