:root {
  --brand: #1d4ed8;
  --brand-light: #3b82f6;
  --brand-dark: #1e3a8a;
  --brand-50: #eef4ff;
  --slate-900: #0f172a;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Manrope", system-ui, sans-serif;
  color: var(--slate-900);
  background: #fff;
  line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.wrap-narrow {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header (igual que la landing) */
header {
  border-bottom: 1px solid var(--slate-200);
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(6px);
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  color: var(--brand-dark);
}

.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.header-actions { display: flex; align-items: center; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 22px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--brand-dark); }
.btn-sm { padding: 9px 16px; font-size: 14px; border-radius: 8px; }

.btn-ghost {
  background: transparent;
  color: var(--slate-700);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  padding: 9px 14px;
}
.btn-ghost:hover { color: var(--brand); }

/* Blog index */
.blog-hero { padding: 56px 0 40px; background: linear-gradient(180deg, var(--brand-50) 0%, #fff 65%); }
.blog-hero h1 { font-size: clamp(28px, 4vw, 40px); margin: 0 0 12px; letter-spacing: -0.02em; }
.blog-hero p { font-size: 17px; color: var(--slate-600); max-width: 560px; margin: 0; }

.kicker {
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 10px;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  padding: 40px 0 64px;
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: 1px solid var(--slate-200);
  border-radius: 14px;
  padding: 22px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.post-card:hover { box-shadow: 0 10px 28px -14px rgba(15,23,42,0.18); transform: translateY(-2px); }
.post-card .tag {
  display: inline-flex;
  width: fit-content;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--brand);
  background: var(--brand-50);
  padding: 4px 10px;
  border-radius: 999px;
}
.post-card h2 { font-size: 18px; margin: 0; line-height: 1.35; }
.post-card p { font-size: 14px; color: var(--slate-600); margin: 0; }

/* Artículo */
.post-header { padding: 48px 0 32px; border-bottom: 1px solid var(--slate-200); }
.post-header .tag {
  display: inline-flex;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--brand);
  background: var(--brand-50);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.post-header h1 { font-size: clamp(28px, 4vw, 38px); line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.02em; }
.post-header .meta { color: var(--slate-500); font-size: 14px; }

.prose { padding: 40px 0 24px; font-size: 17px; color: var(--slate-700); }
.prose h2 { font-size: 24px; color: var(--slate-900); margin: 40px 0 14px; letter-spacing: -0.01em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 19px; color: var(--slate-900); margin: 28px 0 10px; }
.prose p { margin: 0 0 18px; }
.prose ul, .prose ol { margin: 0 0 18px; padding-left: 22px; }
.prose li { margin-bottom: 8px; }
.prose a { color: var(--brand); font-weight: 600; text-decoration: underline; text-decoration-color: rgba(29,78,216,0.3); text-underline-offset: 2px; }
.prose a:hover { text-decoration-color: var(--brand); }
.prose strong { color: var(--slate-900); }
.prose table { width: 100%; border-collapse: collapse; margin: 0 0 20px; font-size: 15px; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--slate-200); }
.prose th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--slate-500); }

.callout {
  background: var(--brand-50);
  border: 1px solid #dbe8fe;
  border-radius: 14px;
  padding: 24px;
  margin: 32px 0;
}
.callout h3 { margin-top: 0; font-size: 18px; }
.callout p { color: var(--slate-700); margin-bottom: 16px; }
.callout .btn { color: #fff; text-decoration: none; }

.related {
  border-top: 1px solid var(--slate-200);
  padding: 32px 0 56px;
}
.related h3 { font-size: 15px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--slate-500); margin: 0 0 16px; }
.related-links { display: flex; flex-wrap: wrap; gap: 10px; }
.related-links a {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--slate-200);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
  text-decoration: none;
}
.related-links a:hover { background: var(--brand-50); border-color: #dbe8fe; }

/* Footer */
footer { border-top: 1px solid var(--slate-200); padding: 32px 0; }
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--slate-500);
}
footer a { text-decoration: none; color: var(--slate-500); }
footer a:hover { color: var(--brand); }
.footer-links { display: flex; gap: 20px; }

@media (max-width: 480px) {
  .logo { font-size: 15px; }
  .btn-ghost { display: none; }
  .header-inner { padding: 12px 0; }
}