:root {
  --texto: #1d2129;
  --fondo: #fafaf7;
  --acento: #6d2e46;
  --borde: #d8d3cd;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--texto);
  background: var(--fondo);
  line-height: 1.5;
}

header {
  background: var(--acento);
  color: #fff;
  padding: 1.5rem 1rem;
}

header h1 { margin: 0; font-size: 1.8rem; }
.tagline { margin: 0.25rem 0 0; opacity: 0.9; }

main {
  max-width: 64rem;
  margin: 0 auto;
  padding: 1rem;
}

section { margin-bottom: 2.5rem; }

form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
  margin: 1rem 0;
}

.campo { display: flex; flex-direction: column; gap: 0.25rem; }

label { font-weight: 600; font-size: 0.9rem; }

select, input, button {
  font: inherit;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--borde);
  border-radius: 4px;
  background: #fff;
}

button {
  background: var(--acento);
  color: #fff;
  border: none;
  cursor: pointer;
}

button:hover { filter: brightness(1.1); }

#resultado dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.25rem 1rem;
  background: #fff;
  border: 1px solid var(--borde);
  border-radius: 6px;
  padding: 1rem;
  max-width: 30rem;
}

#resultado dt { font-weight: 600; }
#resultado dd { margin: 0; }

.error {
  color: #8a1f11;
  background: #fdecea;
  border: 1px solid #f5c6cb;
  border-radius: 6px;
  padding: 0.75rem 1rem;
  max-width: 30rem;
}

.tabla-contenedor {
  overflow-x: auto;
  border: 1px solid var(--borde);
  border-radius: 6px;
  background: #fff;
  /* Sombra que insinúa contenido a la derecha */
  background-image:
    linear-gradient(to right, #fff 30%, rgba(255, 255, 255, 0)),
    linear-gradient(to left, #fff 30%, rgba(255, 255, 255, 0)),
    radial-gradient(farthest-side at 0 50%, rgba(0, 0, 0, 0.18), rgba(0, 0, 0, 0)),
    radial-gradient(farthest-side at 100% 50%, rgba(0, 0, 0, 0.18), rgba(0, 0, 0, 0));
  background-repeat: no-repeat;
  background-size: 40px 100%, 40px 100%, 12px 100%, 12px 100%;
  background-position: 0 0, 100% 0, 0 0, 100% 0;
  background-attachment: local, local, scroll, scroll;
}

.tabla-contenedor table { margin: 0; }
.tabla-contenedor:focus { outline: 2px solid var(--acento); outline-offset: 2px; }

table.cobertura {
  border-collapse: collapse;
  font-size: 0.85rem;
  background: #fff;
}

table.cobertura th, table.cobertura td {
  border: 1px solid var(--borde);
  padding: 0.3rem 0.5rem;
  text-align: left;
  white-space: nowrap;
}

/* Columnas "Clave" y "Entidad" fijas al desplazar horizontalmente */
table.cobertura .fija {
  position: sticky;
  left: 0;
  background: #fff;
  z-index: 1;
}
table.cobertura td.fija:nth-child(2),
table.cobertura th.fija:nth-child(2) { left: 3rem; }
table.cobertura thead th.fija { background: #efe9e4; }
table.cobertura tfoot td.fija { background: #f5f0ec; }

table.cobertura td:last-child { white-space: normal; min-width: 12rem; }
table.cobertura thead th { background: #efe9e4; }
table.cobertura tfoot td { font-weight: 700; background: #f5f0ec; }

.notas-cobertura { font-size: 0.85rem; color: #444; }
.notas-cobertura li { margin-bottom: 0.25rem; }

.nota { color: #555; font-size: 0.9rem; }

footer {
  border-top: 1px solid var(--borde);
  padding: 1rem;
  text-align: center;
  font-size: 0.85rem;
  color: #555;
}