/* ==========================================================================
   Blog Index — CITEM Design System (Blockout Suizo)
   Base styles only. Zero @media queries here.
   Breakpoints → blog-index.responsive.css
   Tokens de global.css. Zero border-radius. Sin sombras difusas.
   ========================================================================== */

/* ── Page Header ── */
.blog-index-header {
  padding: var(--space-3xl) 0 var(--space-2xl);
  border-bottom: var(--border-w-structural) solid var(--c-indigo);
}

.blog-index-kicker {
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--c-coral);
  margin-bottom: var(--space-md);
}

.blog-index-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-title);
  line-height: 1;
  color: var(--c-indigo);
  margin-bottom: var(--space-lg);
}

.blog-index-description {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--c-carbon);
  max-width: 52ch;
  margin: 0;
}

/* ── Article Grid ── */
.blog-index-main {
  padding: var(--space-3xl) 0 var(--space-4xl);
}

/* Reset semántico — <ul> es puramente estructural */
/* Grid base: 1 columna. El responsive escala a 2/3 cols en blog-index.responsive.css */
.blog-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

/* ── Article Card ── */
/* Tarjeta brutalista: borde grueso, fondo plano, sin border-radius.
   El efecto "card" viene del contraste de borde + fondo, no de sombras. */
.blog-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-xl);
  text-decoration: none;
  color: inherit;
  border: var(--border-w-structural) solid var(--c-indigo);
  background-color: var(--c-paper);
  height: 100%;
  /* Micro-interacción deliberada: sólo propiedades compositor-safe */
  transition:
    background-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out);
}

.blog-card:hover {
  background-color: var(--c-indigo);
  color: var(--c-paper);
}

/* Focus accesible para navegación por teclado */
.blog-card:focus-visible {
  outline: var(--border-w-interactive) solid var(--c-coral);
  outline-offset: 2px;
}

/* ── Eyebrow: fecha + categoría ── */
.blog-card-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.blog-card-date {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgb(var(--c-carbon-rgb) / 0.55);
  line-height: 1;
  /* Hereda el color invertido al hacer hover */
  transition: color var(--dur-fast) var(--ease-out);
}

.blog-card:hover .blog-card-date {
  color: rgb(255 255 255 / 0.6);
}

.blog-card-category {
  font-family: var(--font-heading);
  font-size: 0.58rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--c-coral);
  /* El coral se mantiene sobre fondo oscuro — suficiente contraste */
}

/* ── Card Title ── */
.blog-card-title {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-heading);
  line-height: 1.15;
  color: var(--c-indigo);
  /* flex-grow empuja el benefit y el CTA hacia abajo */
  flex-grow: 1;
  transition: color var(--dur-fast) var(--ease-out);
}

.blog-card:hover .blog-card-title {
  color: var(--c-paper);
}

/* ── Benefit (reemplaza el excerpt genérico) ── */
/* El benefit explica QUÉ APRENDERÁ el lector. No es un resumen — es la promesa. */
.blog-card-benefit {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--c-carbon);
  margin: 0;
  transition: color var(--dur-fast) var(--ease-out);
}

.blog-card:hover .blog-card-benefit {
  color: rgb(255 255 255 / 0.80);
}

/* ── CTA inline ── */
.blog-card-cta {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--c-indigo);
  margin-top: auto;
  padding-top: var(--space-sm);
  border-top: 1px solid rgb(var(--c-indigo-rgb) / 0.15);
  transition: color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}

.blog-card:hover .blog-card-cta {
  color: var(--c-coral);
  border-color: rgb(255 255 255 / 0.20);
}

/* ── Todos los @media → blog-index.responsive.css ── */