/* ==========================================================================
   AGENCYNAB · blog.css
   Estilos para el blog: listado de artículos (blog.html) y
   plantilla de lectura de artículo individual (blog/*.html).
   Se carga DESPUÉS de styles.css y reutiliza sus variables.
   ========================================================================== */

/* ---------- 1. FILTRO DE CATEGORÍAS ---------- */
.blog-filter{
  display:flex; flex-wrap:wrap; gap:10px;
  margin-bottom: 40px;
}
.blog-filter__btn{
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  font-size:.86rem; font-weight:500;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.blog-filter__btn:hover{ border-color: var(--border-strong); color: var(--text-0); }
.blog-filter__btn.is-active{
  background: var(--grad-brand);
  border-color: transparent;
  color:#fff;
}

/* ---------- 2. GRID DE ARTÍCULOS ---------- */
.blog-grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 26px;
}
.blog-card{
  min-width:0;
  background: linear-gradient(160deg, var(--surface), var(--bg-1));
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow:hidden;
  display:flex; flex-direction:column;
  transition: transform var(--t-med) var(--ease), border-color var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
}
.blog-card:hover{ transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow-card); }
.blog-card__preview{
  display:block;
  height: 150px;
  position:relative;
  padding: 16px;
  display:flex; align-items:flex-start;
  background-size: cover; background-position:center;
}
.blog-card__preview::after{
  content:''; position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 26px 26px;
  mix-blend-mode: overlay;
}
.blog-card__preview--1{ background: linear-gradient(135deg, var(--nab-purple) 0%, var(--nab-blue) 100%); }
.blog-card__preview--2{ background: linear-gradient(135deg, var(--nab-purple-deep) 0%, var(--nab-purple) 100%); }
.blog-card__preview--3{ background: linear-gradient(135deg, var(--nab-blue) 0%, var(--nab-cyan) 100%); }
.blog-card__badge{
  position:relative; z-index:1;
  display:inline-flex; align-items:center; gap:8px;
  background: rgba(7,2,15,0.55);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.25);
  color:#fff; font-size:.76rem; font-weight:600;
  padding: 7px 14px; border-radius: var(--radius-pill);
}
.blog-card__body{ padding: 22px; display:flex; flex-direction:column; flex:1; }
.blog-card__meta{
  display:flex; align-items:center; gap:7px;
  font-family: var(--font-mono); font-size:.76rem; color: var(--text-2);
  margin-bottom: 12px;
}
.blog-card__body h2{ font-size:1.08rem; margin-bottom:10px; line-height:1.35; }
.blog-card__body h2 a{ transition: color var(--t-fast) var(--ease); }
.blog-card__body h2 a:hover{ color: var(--nab-cyan-light); }
.blog-card__body p{ color: var(--text-2); font-size:.92rem; flex:1; margin-bottom:16px; }
.blog-card__link{
  display:inline-flex; align-items:center; gap:8px;
  font-weight:600; font-size:.88rem; color: var(--nab-cyan-light);
  transition: gap var(--t-fast) var(--ease);
}
.blog-card__link:hover{ gap:12px; }

/* ---------- 3. PLANTILLA DE ARTÍCULO ---------- */
.post{ padding-top: 160px; padding-bottom: 90px; }
.post__wrap{ max-width: 760px; }

.breadcrumb{
  display:flex; flex-wrap:wrap; align-items:center; gap:8px;
  font-size:.85rem; color: var(--text-2);
  margin-bottom: 30px;
}
.breadcrumb a{ color: var(--text-2); transition: color var(--t-fast) var(--ease); }
.breadcrumb a:hover{ color: var(--nab-cyan-light); }
.breadcrumb i{ font-size:.7rem; opacity:.6; }

.post__header{ margin-bottom: 32px; }
.post__header h1{
  font-size: clamp(1.9rem, 3.6vw, 2.5rem);
  letter-spacing: -0.01em;
  margin-block: 14px 16px;
}
.post__meta{
  display:flex; flex-wrap:wrap; align-items:center; gap:16px;
  font-family: var(--font-mono); font-size:.82rem; color: var(--text-2);
}
.post__meta span{ display:inline-flex; align-items:center; gap:6px; }

.post__hero{
  height: 220px;
  border-radius: var(--radius-lg);
  margin-bottom: 42px;
  position:relative;
  display:flex; align-items:center; justify-content:center;
  overflow:hidden;
}
.post__hero::after{
  content:''; position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.07) 1px, transparent 1px);
  background-size: 30px 30px;
  mix-blend-mode: overlay;
}
.post__hero i{ font-size: 3rem; color: rgba(255,255,255,0.85); position:relative; z-index:1; }

/* Tipografía del cuerpo del artículo */
.post__body{ color: var(--text-1); font-size: 1.06rem; line-height: 1.8; }
.post__body h2{
  font-size: 1.4rem;
  margin-top: 44px;
  margin-bottom: 16px;
  padding-top: 4px;
}
.post__body h3{ font-size: 1.12rem; margin-top: 30px; margin-bottom: 10px; }
.post__body p{ margin-bottom: 20px; }
.post__body ul, .post__body ol{ margin: 0 0 20px 22px; display:flex; flex-direction:column; gap:10px; }
.post__body li{ padding-left: 4px; }
.post__body ul{ list-style: none; margin-left:4px; }
.post__body ul li{
  position:relative; padding-left: 24px;
}
.post__body ul li::before{
  content:''; position:absolute; left:0; top:10px;
  width:8px; height:8px; border-radius:50%;
  background: var(--grad-brand);
}
.post__body ol{ list-style: decimal; margin-left: 22px; }
.post__body strong{ color: var(--text-0); }
.post__body a{ color: var(--nab-cyan-light); text-decoration: underline; text-underline-offset:3px; }

.post__callout{
  background: linear-gradient(160deg, rgba(139,47,224,0.14), var(--surface));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  margin: 30px 0;
  display:flex; gap:16px; align-items:flex-start;
}
.post__callout i{
  color: var(--nab-cyan-light); font-size:1.2rem; margin-top:3px; flex-shrink:0;
}
.post__callout p{ margin:0; font-size:.98rem; color: var(--text-1); }
.post__callout strong{ color: var(--text-0); }

.post__cta{
  margin-top: 50px;
  background: var(--grad-brand-diag);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  text-align:center;
}
.post__cta h3{ color:#fff; font-size:1.25rem; margin-bottom:10px; }
.post__cta p{ color: rgba(255,255,255,0.88); font-size:.96rem; margin-bottom:22px; }
.post__cta .btn--primary{ background:#fff; color: var(--nab-purple-deep); box-shadow:none; }

.post__tags{ display:flex; flex-wrap:wrap; gap:10px; margin-top: 40px; }
.post__tag{
  font-family: var(--font-mono); font-size:.78rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-2);
  padding: 6px 14px; border-radius: var(--radius-pill);
}

.post__back{
  display:inline-flex; align-items:center; gap:8px;
  margin-top: 46px;
  font-weight:600; font-size:.92rem; color: var(--nab-cyan-light);
}
.post__back:hover{ gap:12px; }

/* ---------- 4. RESPONSIVE ---------- */
@media (max-width: 1080px){
  .blog-grid{ grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 640px){
  .blog-grid{ grid-template-columns: minmax(0,1fr); }
  .post{ padding-top: 130px; }
  .post__hero{ height:160px; }
  .post__cta{ padding: 28px 22px; }
}