/* ======== RESET BÁSICO ======== */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: Arial, Helvetica, sans-serif; background: #f5f7fb; color: #1f2937; line-height: 1.6; }

/* ======== ENCABEZADO ======== */
.site-header { background: #0b3d91; color: #fff; padding: 16px 12px; }
.site-header h1 { margin: 0; font-size: 28px; }
.site-header nav { margin-top: 8px; }
.site-header nav a { color: #fff; text-decoration: none; margin-right: 16px; font-weight: 600; }
.site-header nav a:hover { text-decoration: underline; }

/* ======== SECCIONES ======== */
.section, .hero { max-width: 980px; margin: 24px auto; background: #fff; padding: 24px; border-radius: 12px; box-shadow: 0 2px 10px rgba(0,0,0,.08); }
.hero { background: #e9f1ff; text-align: center; }
.hero h2 { margin-top: 0; font-size: 28px; color: #0b3d91; }
.section h2 { margin-top: 0; font-size: 24px; color: #0b3d91; }

/* ======== FORMULARIO ======== */
.form-section form { display: grid; gap: 14px; }
label { display: block; font-weight: 600; }
input[type="text"], input[type="number"], input[type="email"], input[type="tel"], input[type="file"] {
  width: 100%; padding: 10px; border: 1px solid #cbd5e1; border-radius: 8px; background: #fff;
}
.grid2 { display: grid; gap: 14px; grid-template-columns: repeat(2, 1fr); }
@media (max-width: 700px) { .grid2 { grid-template-columns: 1fr; } }

.btn {
  display: inline-block; padding: 12px 18px; background: #0b3d91; color: #fff; border: none; border-radius: 8px; font-weight: 700; cursor: pointer; text-align: center;
}
.btn:hover { background: #2563eb; }
.muted { color: #6b7280; font-size: 14px; }

/* ======== FOOTER ======== */
.site-footer { text-align: center; padding: 30px 16px; color: #fff; background: #0b3d91; margin-top: 30px; }

/* ======== OVERLAY DE CARGA ======== */
#loading-overlay {
  display: none;             /* Oculto inicialmente */
  position: fixed;           /* Cubre toda la ventana */
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-color: rgba(11, 61, 145, 0.95);  /* Azul corporativo con transparencia */
  color: white;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  z-index: 9999;
  text-align: center;
}
#loading-overlay.show { display: flex; }

#loading-overlay p { font-size: 1.25rem; margin-top: 16px; line-height: 1.5; }

/* Spinner */
.spinner {
  width: 70px; height: 70px;
  border: 6px solid rgba(255,255,255,0.3);
  border-top: 6px solid #fff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}