.formulario {
  max-width: 700px;
  margin: 40px auto;
  padding: 30px;
  background: #f7f7f7;
  border-radius: 12px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  font-family: Arial, sans-serif;
  box-sizing: border-box;
}

.formulario h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

.formulario .fila {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.formulario .campo {
  flex: 1 1 100%;
  display: flex;
  flex-direction: column;
}

.formulario .campo label {
  margin-bottom: 5px;
  font-weight: bold;
  color: #444;
}

.formulario .campo input,
.formulario .campo textarea {
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 16px;
  resize: vertical;
  box-sizing: border-box;
}

.formulario .campo textarea {
  min-height: 120px;
}

.formulario button {
  margin-top: 20px;
  width: 100%;
  padding: 12px;
  background: #2196f3;
  color: white;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

.formulario button:hover {
  background: #1976d2;
}

/* RESPONSIVE: dos columnas en pantallas grandes */
@media (min-width: 600px) {
  .formulario .campo.mitad {
    flex: 1 1 48%;
  }
}