:root {
  --ink: #0f172a;
  --muted: #526176;
  --line: #dbe4ef;
  --surface: #fff;
  --soft: #f4f8fc;
  --brand: #1d4ed8;
  --brand-dark: #173b78;
  --cyan: #0891b2;
  --radius: 18px;
  --shadow: 0 16px 44px rgba(15, 23, 42, .09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #f7f9fc;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  cursor: pointer;
}

a:focus-visible {
  outline: 3px solid rgba(8, 145, 178, .45);
  outline-offset: 3px;
}

/* Cabecera */

.cabecera-principal {
  background: #0f172a;
  box-shadow: 0 8px 24px rgba(15, 23, 42, .16);
}

.cabecera-contenido {
  width: min(100% - 32px, 1240px);
  min-height: 68px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.marca {
  width: min(220px, 48vw);
  flex-shrink: 0;
}

.marca-logo {
  display: block;
  width: 100%;
  height: auto;
}

/* Navegación principal */

.navegacion-principal {
  display: flex;
  align-items: center;
  gap: 6px;
}

.navegacion-principal a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 14px;
  border-radius: 999px;
  color: #cbd5e1;
  font-size: .9rem;
  font-weight: 750;
  text-decoration: none;
}

.navegacion-principal a:hover {
  color: #fff;
  background: rgba(255, 255, 255, .08);
}

.navegacion-principal a[aria-current="page"] {
  color: #fff;
  background: rgba(255, 255, 255, .13);
}

/* Página */

.pagina-guias {
  width: min(100% - 32px, 1240px);
  margin: 0 auto 80px;
}

/* Hero */

.hero-guias {
  max-width: 820px;
  padding: 64px 0 34px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--brand);
  font-size: .82rem;
  font-weight: 850;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.hero-guias h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4.8vw, 3.7rem);
  line-height: 1.05;
  letter-spacing: -.04em;
}

.hero-guias > p:last-child {
  max-width: 720px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.15rem);
}

/* Introducción */

.introduccion-guias {
  max-width: 820px;
  margin: 10px 0 56px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.introduccion-guias h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.introduccion-guias p {
  margin: 0;
  color: var(--muted);
}

/* Categorías */

.categoria-guias {
  margin-top: 48px;
}

.cabecera-categoria {
  margin-bottom: 20px;
}

.etiqueta-categoria {
  margin: 0 0 5px;
  color: var(--brand);
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.cabecera-categoria h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2rem);
  line-height: 1.15;
  letter-spacing: -.025em;
}

/* Grid preparado para crecer */

.grid-guias {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

/* Tarjetas editoriales */

.tarjeta-guia {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 28px rgba(15, 23, 42, .055);
}

.tema-guia {
  margin: 0 0 10px;
  color: var(--cyan);
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.tarjeta-guia h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
  line-height: 1.3;
}

.tarjeta-guia h3 a {
  color: var(--ink);
  text-decoration: none;
}

.tarjeta-guia h3 a:hover {
  color: var(--brand);
}

.tarjeta-guia > p:not(.tema-guia) {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: .94rem;
}

.enlace-guia {
  margin-top: auto;
  align-self: flex-start;
  color: var(--brand);
  font-weight: 800;
  text-decoration: none;
}

.enlace-guia:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Pie */

.pie-pagina {
  margin-top: 64px;
  background: #0f172a;
  color: #cbd5e1;
}

.pie-contenido {
  width: min(100% - 32px, 1200px);
  margin: auto;
  padding: 38px 0 30px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 28px;
}

.pie-marca {
  width: 190px;
}

.pie-navegacion {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 18px;
}

.pie-navegacion a {
  color: #cbd5e1;
  text-decoration: none;
}

.pie-navegacion a:hover {
  color: #fff;
}

.copyright {
  width: min(100% - 32px, 1200px);
  margin: auto;
  padding: 17px 0;
  border-top: 1px solid rgba(255, 255, 255, .12);
  text-align: center;
  color: #94a3b8;
}

.copyright p {
  margin: 0;
}

/* Responsive */

@media (max-width: 980px) {
  .grid-guias {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .cabecera-contenido {
    width: min(100% - 20px, 1240px);
    min-height: 62px;
    gap: 10px;
  }

  .marca {
    width: min(158px, 42vw);
  }

  .navegacion-principal {
    gap: 2px;
  }

  .navegacion-principal a {
    min-height: 36px;
    padding: 7px 9px;
    font-size: .76rem;
  }

  .pagina-guias {
    width: min(100% - 20px, 1240px);
  }

  .hero-guias {
    padding: 42px 4px 24px;
  }

  .introduccion-guias {
    margin-bottom: 42px;
    padding: 18px;
  }

  .grid-guias {
    grid-template-columns: 1fr;
  }

  .tarjeta-guia {
    padding: 20px;
  }

  .pie-contenido {
    grid-template-columns: 1fr;
  }

  .pie-navegacion {
    justify-content: flex-start;
  }
}

@media (max-width: 360px) {
  .pagina-guias {
    width: 100%;
    padding: 0 8px;
  }

  .marca {
    width: 130px;
  }

  .navegacion-principal a {
    padding: 6px 7px;
    font-size: .7rem;
  }

  .hero-guias h1 {
    font-size: 1.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}