body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  padding: 20px;
}
.container {
  background: white;
  padding: 20px;
  max-width: 600px;
  margin: auto;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
label {
  display: block;
  margin: 10px 0;
}
input, select, button {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
  box-sizing: border-box;
}
button {
  margin-top: 15px;
  background-color: #0c8f57;
  color: white;
  border: none;
  cursor: pointer;
}
#btnPDF {
  background-color: #006bb3;
}
.resultado {
  margin-top: 20px;
  padding: 15px;
  background: #e0f7ea;
  border-left: 5px solid #0c8f57;
}