/* ====== FRANJA DE SECCIÓN ====== */
.section-banner {
  position: relative;
  background: url("../imagenes/frontis.jpg") no-repeat center center/cover;
  padding: 3rem 1rem;
  border-radius: 12px;
  margin: 2rem auto;
  text-align: center;
  overflow: hidden;
}

.section-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(128, 0, 0, 0.75); /* guinda con opacidad */
  border-radius: 12px;
}

.section-banner h1 {
  position: relative;
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  z-index: 1;
}

.section-banner h1 i {
  font-size: 1.8rem;
}


/* ====== CONTENIDO DEL TUPA ====== */
.tupa.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1rem;
}

/* ===== Visor PDF ===== */
.tupa__visor {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  min-height: 200px;
  text-align: center;
}

/* ===== Mensaje de error ===== */
.mensaje-error {
  color: #800000;
  font-weight: 600;
  font-size: 1.2rem;
  margin: 2rem 0;
}