/* ============================================================
   blog.css — distinctive blog/journal designs, one per filial.
   Each filial gets its own listing personality:
   - consultoria → editorial broadsheet (prensa económica)
   - sistemas    → changelog / release notes
   - ia          → research log / model-card index
   - calidad     → normative bulletin / boletín
   ============================================================ */

.blog-head {
  padding: 80px 0 48px;
  border-bottom: 1px solid var(--line);
}
.blog-head .kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex; align-items: center; gap: 12px;
  margin-bottom: 18px;
}
.blog-head .kicker::before { content: ""; width: 32px; height: 1.5px; background: var(--accent); }
.blog-head h1 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(48px, 7vw, 104px);
  letter-spacing: -0.045em;
  line-height: 0.95;
  margin: 0;
}
.blog-head h1 .it { font-family: var(--serif); font-style: italic; color: var(--accent); }
.blog-head .sub {
  margin-top: 28px;
  font-family: var(--display);
  font-size: 20px;
  line-height: 1.5;
  color: var(--fg-dim);
  max-width: 60ch;
}
.blog-head .sub em { font-style: italic; color: var(--accent); }

/* ============================================================
   CONSULTORÍA · editorial broadsheet
   ============================================================ */
.blog-broadsheet {
  padding: 64px 0 96px;
}
.bs-lead {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 56px;
  padding-bottom: 48px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 8px;
}
.bs-lead .feature {
  display: flex; flex-direction: column; gap: 18px;
}
.bs-lead .feature .cat {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent);
}
.bs-lead .feature h2 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(32px, 4vw, 56px);
  letter-spacing: -0.035em;
  line-height: 1.0;
  margin: 0;
}
.bs-lead .feature h2 .it { font-style: italic; color: var(--accent); }
.bs-lead .feature .standfirst {
  font-family: var(--display);
  font-size: 18px;
  line-height: 1.5;
  color: var(--fg-dim);
}
.bs-lead .feature .byline {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.1em; color: var(--fg-mute);
}
.bs-lead .secondary {
  display: flex; flex-direction: column; gap: 0;
  border-left: 1px solid var(--line);
  padding-left: 40px;
}
.bs-lead .secondary article {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.bs-lead .secondary article:first-child { padding-top: 0; }
.bs-lead .secondary article:last-child { border-bottom: 0; }
.bs-lead .secondary .cat {
  font-family: var(--mono); font-size: 9px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent);
}
.bs-lead .secondary h3 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 20px;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 6px 0 0;
}
.bs-columns {
  columns: 3;
  column-gap: 40px;
  margin-top: 48px;
}
.bs-columns article {
  break-inside: avoid;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  margin-bottom: 8px;
}
.bs-columns article:first-child { border-top: 0; padding-top: 0; }
.bs-columns .date {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.14em; color: var(--fg-mute);
}
.bs-columns h4 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 6px 0 8px;
}
.bs-columns p {
  font-family: var(--display);
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg-dim);
  margin: 0;
}
@media (max-width: 900px) {
  .bs-lead { grid-template-columns: 1fr; gap: 32px; }
  .bs-lead .secondary { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); padding-top: 24px; }
  .bs-columns { columns: 1; }
}

/* ============================================================
   SISTEMAS · changelog / release notes
   ============================================================ */
.blog-changelog {
  padding: 64px 0 96px;
  max-width: 880px;
  margin: 0 auto;
}
.cl-entry {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 40px;
  padding: 36px 0;
  border-top: 1px solid var(--line);
}
.cl-entry:first-child { border-top: 0; }
.cl-meta { position: relative; }
.cl-meta .ver {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-weight: 500;
}
.cl-meta .date {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-mute);
  margin-top: 4px;
  display: block;
}
.cl-meta .tag {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--paper-warm);
  color: var(--fg-dim);
}
.cl-meta .tag.feature { background: var(--accent); color: #fff; }
.cl-meta .tag.security { background: var(--ink); color: var(--inv); }
.cl-body h3 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 26px;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0 0 12px;
}
.cl-body h3 .it { font-style: italic; color: var(--accent); }
.cl-body p {
  font-family: var(--display);
  font-size: 16px;
  line-height: 1.55;
  color: var(--fg-dim);
  margin: 0 0 14px;
}
.cl-body ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 8px;
}
.cl-body li {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg);
  padding-left: 22px;
  position: relative;
  line-height: 1.5;
}
.cl-body li::before {
  content: "+";
  position: absolute; left: 0;
  color: var(--accent);
  font-family: var(--display);
  font-style: italic;
}
@media (max-width: 900px) {
  .cl-entry { grid-template-columns: 1fr; gap: 16px; }
}

/* ============================================================
   IA · research log
   ============================================================ */
.blog-research {
  padding: 64px 0 96px;
}
.rl-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.rl-paper {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 34px 28px;
  display: flex; flex-direction: column; gap: 14px;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}
.rl-paper:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: var(--shadow-3); }
.rl-paper.featured { grid-column: span 2; background: var(--ink); color: var(--inv); border-color: transparent; }
.rl-paper .arxiv {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--accent);
  display: flex; gap: 14px;
}
.rl-paper.featured .arxiv { color: var(--accent-on-dark, var(--accent)); }
.rl-paper h3 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 24px;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0;
}
.rl-paper.featured h3 { font-size: 34px; }
.rl-paper h3 .it { font-style: italic; color: var(--accent); }
.rl-paper.featured h3 .it { color: var(--accent-on-dark, var(--accent)); }
.rl-paper .abstract {
  font-family: var(--display);
  font-size: 15px;
  line-height: 1.55;
  color: var(--fg-dim);
  margin: 0;
}
.rl-paper.featured .abstract { color: var(--inv-dim); max-width: 60ch; }
.rl-paper .metrics {
  display: flex; gap: 28px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.rl-paper.featured .metrics { border-top-color: var(--inv-line); }
.rl-paper .metric .v {
  font-family: var(--display); font-style: italic;
  font-size: 28px; letter-spacing: -0.03em; color: var(--accent);
}
.rl-paper.featured .metric .v { color: var(--accent-on-dark, var(--accent)); }
.rl-paper .metric .l {
  font-family: var(--mono); font-size: 9px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--fg-mute);
}
.rl-paper.featured .metric .l { color: var(--inv-mute); }
@media (max-width: 900px) {
  .rl-grid { grid-template-columns: 1fr; }
  .rl-paper.featured { grid-column: span 1; }
  .rl-paper.featured h3 { font-size: 26px; }
}

/* ============================================================
   CALIDAD · normative bulletin
   ============================================================ */
.blog-bulletin {
  padding: 64px 0 96px;
  max-width: 920px;
  margin: 0 auto;
}
.bul-entry {
  display: grid;
  grid-template-columns: 120px 1fr 100px;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.bul-entry:first-child { border-top: 2px solid var(--ink); padding-top: 28px; }
.bul-ref {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 500;
}
.bul-ref .date {
  display: block;
  color: var(--fg-mute);
  margin-top: 4px;
  font-size: 10px;
}
.bul-body h3 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 8px;
}
.bul-body h3 .it { font-style: italic; color: var(--accent); }
.bul-body p {
  font-family: var(--display);
  font-size: 15px;
  line-height: 1.55;
  color: var(--fg-dim);
  margin: 0;
}
.bul-body .norms {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 12px;
}
.bul-body .norms span {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 9px;
  border: 1px solid var(--accent);
  color: var(--accent-deep);
  border-radius: 999px;
}
.bul-status {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-align: right;
  color: var(--fg-mute);
}
.bul-status.vigor { color: var(--accent); }
@media (max-width: 900px) {
  .bul-entry { grid-template-columns: 1fr; gap: 12px; }
  .bul-status { text-align: left; }
}

/* shared blog CTA / pager */
.blog-pager {
  padding: 40px 0 80px;
  display: flex; justify-content: center; gap: 12px;
}
.blog-pager a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 12px 22px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--fg);
  transition: all 160ms ease;
}
.blog-pager a:hover { background: var(--fg); color: var(--inv); border-color: var(--fg); }
.blog-pager a.active { background: var(--accent); color: #fff; border-color: var(--accent); }