/* TML Blog Oficial — Design System Dark Slate (Tokens de Diseño V2) */
:root {
  --bg-primary: #0A0F1D;
  --bg-secondary: #0F172A;
  --bg-card: #131D31;
  --bg-card-hover: #1A2742;
  --border-subtle: #1E293B;
  --border-glow: #2B6CB0;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --accent-blue: #2B6CB0;
  --accent-blue-light: #38BDF8;
  --accent-gold: #F59E0B;
  --accent-red: #E11D48;
  --accent-green: #10B981;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'EB Garamond', Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.7;
  font-size: 1.05rem;
  overflow-x: hidden;
}

/* Barra de Lectura */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-gold));
  width: 0%;
  z-index: 999;
  transition: width 0.1s;
}

/* Header & Navegación */
header {
  background: rgba(10, 15, 29, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.9rem 1.5rem;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
}

.brand-logo-img {
  height: 38px;
  width: auto;
  display: block;
}

.brand-text {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #FFF;
}

.brand-badge {
  background: rgba(43, 108, 176, 0.25);
  color: var(--accent-blue-light);
  border: 1px solid rgba(56, 189, 248, 0.3);
  font-size: 0.72rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

nav {
  display: flex;
  align-items: center;
  gap: 1.3rem;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover { color: #FFF; }

.nav-link-special {
  color: var(--accent-gold) !important;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.btn-header-cta {
  background: linear-gradient(135deg, var(--accent-blue), #1D4ED8);
  color: #FFF !important;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.88rem;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-header-cta:hover {
  background: linear-gradient(135deg, #1D4ED8, #1E40AF);
  transform: translateY(-1px);
}

/* Main Container */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

/* Hero Section Blog Home */
.blog-hero {
  text-align: center;
  padding: 3rem 1rem 3.5rem 1rem;
  max-width: 860px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(43, 108, 176, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--accent-blue-light);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1.2rem;
}

.blog-hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
  color: #FFF;
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}

.blog-hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  line-height: 1.7;
}

/* Filtros de Categoría */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 0.7rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.55rem 1.2rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover {
  background: var(--bg-card);
  color: #FFF;
  border-color: var(--border-glow);
}

.filter-btn.active {
  background: var(--accent-blue);
  color: #FFF;
  border-color: var(--accent-blue);
  box-shadow: 0 4px 12px rgba(43, 108, 176, 0.3);
}

/* Grid de Artículos */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.5);
  background: var(--bg-card-hover);
}

.card-banner {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom: 1px solid var(--border-subtle);
}

.card-body {
  padding: 1.6rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.8rem;
  font-size: 0.82rem;
}

.category-tag {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.category-tag.academico { color: var(--accent-blue-light); }
.category-tag.empresarial { color: var(--accent-gold); }

.card-time { color: var(--text-muted); }

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.35;
  color: #FFF;
  margin-bottom: 0.9rem;
  text-decoration: none;
}

.card-title:hover { color: var(--accent-blue-light); }

.card-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.card-read-link {
  color: var(--accent-blue-light);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap 0.2s;
}

.card-read-link:hover { gap: 0.5rem; }

/* Banner Funnel Diagnóstico */
.funnel-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.95), rgba(15, 23, 42, 0.98));
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 20px;
  padding: 2.5rem;
  margin: 3.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 36px -10px rgba(245, 158, 11, 0.15);
}

.funnel-card::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.funnel-badge {
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 158, 11, 0.4);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 0.8rem;
  text-transform: uppercase;
}

.funnel-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: #FFF;
  margin-bottom: 0.6rem;
}

.funnel-desc {
  color: var(--text-secondary);
  font-size: 0.98rem;
  max-width: 650px;
  line-height: 1.6;
}

.btn-funnel {
  background: linear-gradient(135deg, var(--accent-gold), #D97706);
  color: #0F172A !important;
  font-weight: 800;
  padding: 0.85rem 1.6rem;
  border-radius: 12px;
  text-decoration: none;
  font-size: 0.95rem;
  white-space: nowrap;
  transition: all 0.2s;
  box-shadow: 0 6px 18px rgba(245, 158, 11, 0.3);
}

.btn-funnel:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.45);
}

/* Plantilla de Artículo Individual */
.article-layout {
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem 1.5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1.8rem;
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

.breadcrumb a:hover { color: #FFF; }

.article-header { margin-bottom: 2.5rem; }

.article-badges {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}

.badge-rigor {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.article-header h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.25;
  color: #FFF;
  margin-bottom: 1.4rem;
  letter-spacing: -0.02em;
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

/* Bloque BLUF */
.bluf-box {
  background: rgba(43, 108, 176, 0.12);
  border-left: 4px solid var(--accent-blue);
  border-radius: 0 12px 12px 0;
  padding: 1.4rem 1.6rem;
  margin: 2.2rem 0;
}

.bluf-label {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--accent-blue-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

.bluf-content {
  color: #E2E8F0;
  font-size: 1.05rem;
  line-height: 1.65;
  font-weight: 500;
}

/* Banner de Cabecera del Artículo */
.article-featured-banner {
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  margin-bottom: 2.5rem;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

.article-featured-banner img {
  width: 100%;
  height: auto;
  display: block;
}

/* Contenido del Artículo */
.article-content h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: #FFF;
  margin: 2.6rem 0 1rem 0;
  letter-spacing: -0.01em;
  border-left: 4px solid var(--accent-blue);
  padding-left: 0.8rem;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #E2E8F0;
  margin: 2rem 0 0.8rem 0;
}

.article-content p {
  margin-bottom: 1.4rem;
  color: #CBD5E1;
  font-size: 1.05rem;
  line-height: 1.75;
}

.article-content ul, .article-content ol {
  margin: 1rem 0 1.6rem 1.8rem;
  color: #CBD5E1;
}

.article-content li { margin-bottom: 0.5rem; }

.article-content blockquote {
  background: var(--bg-card);
  border-left: 4px solid var(--accent-gold);
  padding: 1.2rem 1.5rem;
  border-radius: 0 10px 10px 0;
  margin: 1.8rem 0;
  font-style: italic;
  color: #E2E8F0;
}

/* Tablas con Estilo Científico */
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2.2rem 0;
  background: var(--bg-card);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.article-content th, .article-content td {
  padding: 0.9rem 1.2rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.95rem;
}

.article-content th {
  background: #0F172A;
  color: #FFF;
  font-weight: 700;
}

/* Bloque de Autor TML */
.author-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1.8rem;
  margin-top: 3.5rem;
  display: flex;
  gap: 1.4rem;
  align-items: center;
}

.author-avatar {
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), #1E40AF);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.4rem;
  color: #FFF;
  flex-shrink: 0;
}

.author-title {
  font-weight: 700;
  color: #FFF;
  margin-bottom: 0.3rem;
}

.author-bio {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Doble CTA Final de Artículo */
.article-ctas-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}

.cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.cta-box.diagnostic {
  border-color: rgba(245, 158, 11, 0.4);
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.6), rgba(15, 23, 42, 0.9));
}

.cta-box.whatsapp {
  border-color: rgba(37, 99, 235, 0.4);
}

.cta-box h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #FFF;
  margin-bottom: 0.5rem;
}

.cta-box p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-subtle);
  padding: 3.5rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 4rem;
  background: rgba(10, 15, 29, 0.5);
}

footer a {
  color: var(--text-secondary);
  text-decoration: none;
  margin: 0 0.5rem;
}

footer a:hover { color: #FFF; }

/* Responsive */
@media (max-width: 768px) {
  .blog-hero h1 { font-size: 2rem; }
  .article-header h1 { font-size: 1.9rem; }
  .articles-grid { grid-template-columns: 1fr; }
  .funnel-card { flex-direction: column; text-align: center; padding: 1.8rem; }
  .article-ctas-wrapper { grid-template-columns: 1fr; }
  nav a:not(.btn-header-cta) { display: none; }
}