body {
  background-color: #f8f9fa;
  font-family: Arial, sans-serif;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.contenedor {
  text-align: center;
  background: #fff;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  max-width: 700px;
  width: 100%;
}

.contenedor h2 {
  margin-bottom: 20px;
  font-weight: bold;
  color: #333;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}

table th,
table td {
  border: 1px solid #ddd;
  padding: 12px;
  text-align: center;
}

table th {
  background-color: #f1f1f1;
  font-weight: bold;
}

input[type="number"],
input[readonly] {
  width: 100%;
  padding: 8px;
  border: 1px solid #bbb;
  border-radius: 5px;
}

button {
  background-color: #0d6efd;
  border: none;
  color: white;
  padding: 12px 20px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
}

button:hover {
  background-color: #0b5ed7;
}

.btn-regresar {
  display: inline-block;
  margin-top: 15px;
  background-color: #6c757d;
  color: white;
  padding: 12px 20px;
  border-radius: 5px;
  text-decoration: none;
  font-size: 16px;
}

.btn-regresar:hover {
  background-color: #5a6268;
}