:root {
  --tinta: #0f172a;
  --tinta-suave: #475569;
  --linea: #e2e8f0;
  --fondo: #f8fafc;
  --superficie: #ffffff;
  --acento: #1d4ed8;
}

* , *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--fondo);
  color: var(--tinta);
  font-weight: 400;
}

a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}

/* Cabecera */

.cabecera {
  border-bottom: 1px solid var(--linea);
  background: var(--superficie);
  position: sticky;
  top: 0;
  z-index: 10;
}

.cabecera-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.logo {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.logo span { color: var(--acento); }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  overflow-x: auto;
}

.nav a {
  font-size: 0.9rem;
  color: var(--tinta-suave);
  white-space: nowrap;
  padding-bottom: 0.2rem;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}

.nav a:hover { color: var(--tinta); }

.nav a.activo {
  color: var(--tinta);
  border-color: var(--color-cat, var(--acento));
  font-weight: 500;
}

/* Contenido */

.contenido {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.titulo-seccion {
  font-size: 1.3rem;
  margin: 0 0 1.25rem;
}

.etiqueta {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-cat, var(--acento));
  margin-bottom: 0.6rem;
}

.meta {
  font-size: 0.82rem;
  color: var(--tinta-suave);
  margin-top: 0.75rem;
}

/* Destacada */

.destacada {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2rem;
  align-items: center;
  background: var(--superficie);
  border: 1px solid var(--linea);
  border-radius: 1rem;
  overflow: hidden;
  margin-bottom: 3rem;
  transition: box-shadow .2s, transform .2s;
}

.destacada:hover { box-shadow: 0 12px 32px -16px rgba(15, 23, 42, .18); }

.destacada-media {
  min-height: 16rem;
  background: linear-gradient(135deg, var(--color-cat, var(--acento)) 0%, rgba(15, 23, 42, .85) 130%);
}

.destacada-texto { padding: 0 2rem 0 0; }

.destacada h1 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.destacada p {
  color: var(--tinta-suave);
  line-height: 1.6;
  margin: 0;
}

/* Grilla de tarjetas */

.grilla {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.grilla-chica { grid-template-columns: repeat(3, 1fr); }

.tarjeta {
  display: flex;
  flex-direction: column;
  background: var(--superficie);
  border: 1px solid var(--linea);
  border-radius: 0.85rem;
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
}

.tarjeta:hover {
  box-shadow: 0 10px 28px -16px rgba(15, 23, 42, .16);
  transform: translateY(-2px);
}

.tarjeta-media {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--color-cat, var(--acento)) 0%, rgba(15, 23, 42, .85) 130%);
}

.tarjeta-texto { padding: 1.15rem 1.25rem 1.4rem; }

.tarjeta h3 {
  font-size: 1.05rem;
  line-height: 1.35;
  margin-bottom: 0.5rem;
}

.tarjeta p {
  font-size: 0.9rem;
  color: var(--tinta-suave);
  line-height: 1.55;
  margin: 0;
}

.vacio { color: var(--tinta-suave); }

/* Artículo */

.articulo {
  max-width: 42rem;
  margin: 0 auto 3.5rem;
}

.volver {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--tinta-suave);
  margin-bottom: 1.5rem;
}

.volver:hover { color: var(--tinta); }

.articulo h1 {
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  line-height: 1.3;
  margin-bottom: 0.9rem;
}

.articulo .bajada {
  font-size: 1.1rem;
  color: var(--tinta-suave);
  line-height: 1.6;
  margin: 0;
}

.articulo .meta { margin-bottom: 1.75rem; }

.articulo-media {
  aspect-ratio: 21 / 9;
  border-radius: 0.85rem;
  background: linear-gradient(135deg, var(--color-cat, var(--acento)) 0%, rgba(15, 23, 42, .85) 130%);
  margin-bottom: 2rem;
}

.cuerpo p {
  font-size: 1.05rem;
  line-height: 1.75;
  color: #1e293b;
  margin: 0 0 1.25rem;
}

.relacionadas {
  max-width: 72rem;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid var(--linea);
}

/* 404 */

.error-404 {
  text-align: center;
  padding: 4rem 0;
}

.error-404 h1 {
  font-size: 4rem;
  color: var(--linea);
  margin-bottom: 0.5rem;
}

.error-404 p { color: var(--tinta-suave); margin-bottom: 1.5rem; }

/* Pie */

.pie {
  border-top: 1px solid var(--linea);
  background: var(--superficie);
}

.pie-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  text-align: center;
}

.insignia {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border: 1px solid var(--linea);
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tinta-suave);
  margin-bottom: 0.75rem;
}

.pie p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--tinta-suave);
}

/* Responsivo */

@media (max-width: 860px) {
  .grilla, .grilla-chica { grid-template-columns: repeat(2, 1fr); }
  .destacada { grid-template-columns: 1fr; }
  .destacada-texto { padding: 0 1.5rem 1.75rem; }
  .destacada-media { min-height: 12rem; }
}

@media (max-width: 560px) {
  .grilla, .grilla-chica { grid-template-columns: 1fr; }
  .cabecera-inner { gap: 1rem; }
  .nav { gap: 1.1rem; }
  .contenido { padding: 1.75rem 1.25rem 3rem; }
}