body {
  background: linear-gradient(135deg, #1e1e2f, #2a2a40);
  font-family: "Segoe UI", sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}


.Caluladora {
  background: #1c1c1c;
  padding: 25px;
  border-radius: 20px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.8);
  width: 280px;
  text-align: center;
}


table {
  width: 100%;
  border: none;
  border-collapse: collapse;
}
tr{
    padding: 4px;
}
td {
  padding: 8px;
}


.pantalla {
  width: 100%;
  height: 60px;
  font-size: 28px;
  border: none;
  border-radius: 10px;
  background: #000;
  color: #00ff7f;
  text-align: right;
  padding-right: 10px;
  box-shadow: inset 0 0 10px rgba(0, 255, 127, 0.3);
  margin-bottom: 15px;
}


.btn {
  width: 60px;
  height: 60px;
  font-size: 22px;
  font-weight: bold;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px #111;
}


.btn-numero {
  background: #2f2f2f;
  color: white;
}

.btn-numero:hover {
  background: #3f3f3f;
}


.btn-operador {
  background: #f39c12;
  color: white;
}

.btn-operador:hover {
  background: #f1c40f;
}


.btn-especial {
  background: #e74c3c;
  color: white;
}

.btn-especial:hover {
  background: #c0392b;
}


.btn:active {
  transform: translateY(3px);
  box-shadow: 0 1px #000;
}


.hover:hover {
  filter: brightness(1.2);
}

.Caluladora {
  border: 4px solid #3d3d3d;
  background: linear-gradient(145deg, #262626, #1a1a1a);
  box-shadow: inset 2px 2px 10px #111, 4px 4px 20px #000;
}