:root { font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial; }
.container { max-width: 1100px; }
.titulo-pagina { font-size: 1.5rem; font-weight: 600; margin-bottom: 1rem; }
.nota { color: #555; margin-bottom: 1rem; }
.seccion {
  margin-bottom: 18px; background: #fff; border: 1px solid #ddd; border-radius: 10px;
  box-shadow: 0 1px 2px rgba(0,0,0,.04); overflow: hidden;
}
.tabla { width: 100%; border-collapse: collapse; table-layout: fixed; }
.tabla th, .tabla td { border: 1px solid #e5e5e5; padding: 10px; vertical-align: top; }
.tabla thead th { background: #f3f4f6; font-weight: 700; text-align: left; }
.titulo { text-align: center; font-weight: 700; background: #eef2ff; }
.titulo span { display: inline-block; padding: 6px 10px; border-radius: 6px; }
.celda-input input {
  width: 100%; box-sizing: border-box; padding: 8px; border: 1px solid #ccc; border-radius: 6px;
  background: #f9fafb;
}
.radio-pair { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.radio-pair label { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; }
.btn-enviar {
  margin-top: 8px; padding: 10px 16px; border-radius: 8px; border: 1px solid #ddd; background: #f3f4f6;
  cursor: pointer;
}
.alert { padding: .6rem .8rem; border-radius: 8px; margin-bottom: .8rem; }
.alert-success { background: #ecfdf5; border: 1px solid #10b98133; color: #065f46; }
.alert-danger  { background: #fef2f2; border: 1px solid #ef444433; color: #7f1d1d; }