/* ===== Tema · Inteligencia artificial — hub de un tema =====
   Reúne todos los formatos (artículos, cursos, libros, conferencias,
   entrevistas) alrededor de un solo tema. Reutiliza tokens globales de
   styles.css, las cards .ac-talk / .ar-card y el grid de vídeo .iv-* de
   entrevistas.css. Aquí solo van: hero, nav por formato, libro destacado,
   lista de cursos y "otros temas". Prefijo: .tia-  */

/* --- Hero --- */
.tia-hero{
  background:var(--bg);
  border-bottom:1px solid var(--rule);
}
.tia-hero-inner{
  padding:8px 32px 34px;
}
.tia-hero-text{max-width:760px}
.tia-hero-eyebrow-row{
  display:flex;align-items:center;gap:14px;margin-bottom:22px;
}
.tia-hero-kicker{
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;color:var(--muted);
}
.tia-hero-eyebrow-rule{
  flex:1;height:1px;background:var(--rule);
}
.tia-hero-ic{
  width:34px;height:34px;color:var(--navy);
}
.tia-hero-ic svg{width:100%;height:100%;stroke:currentColor;fill:none}
.tia-hero-title{
  font-family:var(--serif);font-weight:400;
  font-size:58px;line-height:1.08;letter-spacing:-.015em;
  color:var(--navy);margin:0 0 22px;text-wrap:balance;
}
.tia-hero-title em{font-style:italic;color:var(--amber-2)}
.tia-hero-lede{
  font-family:var(--sans);font-size:16px;line-height:1.6;
  color:var(--ink-2);margin:0;max-width:620px;
}
.tia-hero-lede strong{color:var(--ink);font-weight:600}
.tia-hero-actions{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
}
.tia-follow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--sans);font-size:13px;font-weight:600;
  color:var(--navy);background:transparent;
  border:1px solid var(--navy);padding:11px 18px;cursor:pointer;
  transition:background .18s ease,color .18s ease;
}
.tia-follow:hover{background:var(--ink-block);color:var(--on-ink)}
.tia-follow .plus{font-size:16px;line-height:1;margin-top:-1px}

/* Hero side: índice por formato */
.tia-hero-index{
  border:1px solid var(--rule);
  background:var(--paper);
  padding:6px 0;
}
.tia-hero-index-head{
  display:flex;align-items:baseline;justify-content:space-between;
  padding:14px 18px 12px;border-bottom:1px solid var(--rule);
}
.tia-hero-index-head .ti{
  font-family:var(--sans);font-size:11px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ink);
}
.tia-hero-index-head .tot{
  font-family:var(--mono);font-size:11px;color:var(--muted);
}
.tia-hero-index-row{
  display:flex;align-items:center;gap:12px;
  padding:12px 18px;cursor:pointer;
  border-bottom:1px solid var(--rule);
  color:var(--ink);text-decoration:none;
  transition:background .15s ease;
}
.tia-hero-index-row:last-child{border-bottom:0}
.tia-hero-index-row:hover{background:var(--tint-hover)}
.tia-hero-index-row .ic{width:18px;height:18px;color:var(--navy);flex:none}
.tia-hero-index-row .ic svg{width:100%;height:100%;stroke:currentColor;fill:none}
.tia-hero-index-row .nm{
  font-family:var(--sans);font-size:13.5px;font-weight:500;flex:1;
}
.tia-hero-index-row .ct{
  font-family:var(--mono);font-size:12px;color:var(--muted);
}
.tia-hero-index-row:hover .ct{color:var(--amber-2)}

/* --- Nav sticky por formato --- */
.tia-formatnav{
  position:sticky;top:0;z-index:30;
  background:rgba(var(--navy-rgb),.0);
  backdrop-filter:saturate(1.1);
}
.tia-formatnav-inner{
  display:flex;align-items:stretch;gap:0;
  background:var(--bg-soft);
  border-bottom:1px solid var(--rule);
  overflow-x:auto;scrollbar-width:none;
}
.tia-formatnav-inner::-webkit-scrollbar{display:none}
.tia-formatnav a{
  display:inline-flex;align-items:center;gap:9px;white-space:nowrap;
  padding:14px 22px;
  font-family:var(--sans);font-size:13px;font-weight:600;
  color:var(--ink-2);text-decoration:none;
  border-right:1px solid var(--rule);
  transition:color .15s ease,background .15s ease;
}
.tia-formatnav a:first-child{border-left:1px solid var(--rule)}
.tia-formatnav a:hover{color:var(--navy);background:var(--paper)}
.tia-formatnav a .n{
  font-family:var(--mono);font-size:11px;color:var(--muted);
}
.tia-formatnav a .ic{width:16px;height:16px;color:currentColor}
.tia-formatnav a .ic svg{width:100%;height:100%;stroke:currentColor;fill:none}

/* --- Feature card horizontal (1 sola tarjeta: conferencia y libro) --- */
.tia-feature{
  display:grid;grid-template-columns: 340px minmax(0,1fr);
  gap:36px;align-items:center;
  background:var(--paper);border:1px solid var(--rule);
  padding:28px;
}
.tia-feature.book{grid-template-columns: 200px minmax(0,1fr)}
.tia-feature:hover{border-color:var(--navy)}
.tia-feature-media{position:relative;display:block;flex:none}
.tia-feature.talk .tia-feature-media{aspect-ratio:4/3;overflow:hidden;background:var(--bg-soft)}
.tia-feature.talk .tia-feature-media img{width:100%;height:100%;object-fit:cover;display:block}
.tia-feature.book .tia-feature-media img{
  display:block;width:100%;height:auto;
  box-shadow:0 20px 40px -24px rgba(11,29,58,.55);
}
.tia-feature-media .frame-corners span{border-color:rgba(11,29,58,.4)}
.tia-feature-tag{
  position:absolute;left:10px;bottom:10px;z-index:2;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.04em;
  color:#fff;background:rgba(11,29,58,.78);padding:5px 9px;
}
.tia-feature-body{min-width:0}
.tia-feature-eyebrow{
  font-family:var(--sans);font-size:10.5px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--amber-2);
  display:block;margin-bottom:10px;
}
.tia-feature-title{
  font-family:var(--serif);font-weight:400;
  font-size:30px;line-height:1.12;letter-spacing:-.01em;
  color:var(--navy);margin:0 0 6px;text-wrap:balance;
}
.tia-feature-sub{
  font-family:var(--serif);font-style:italic;font-size:16px;
  line-height:1.35;color:var(--ink-2);margin:0 0 14px;
}
.tia-feature-lede{
  font-family:var(--sans);font-size:14px;line-height:1.6;
  color:var(--ink-2);margin:0 0 20px;max-width:62ch;
}
.tia-feature-meta{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-family:var(--mono);font-size:11.5px;color:var(--muted);
  margin-bottom:20px;
}
.tia-feature-meta .dot{opacity:.6}
.tia-feature-meta > span{white-space:nowrap}
.tia-feature-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}

/* --- Libro próximo (placeholder de portada, temas sin libro publicado) --- */
.tia-book-soon{position:relative;display:block}
.tia-book-soon-cover{
  display:flex;flex-direction:column;justify-content:space-between;
  aspect-ratio:3/4;padding:22px 20px;
  background:linear-gradient(180deg,#0B1D3A 0%,#142D55 100%);
  border-top:3px solid rgba(255,199,44,.55);
  border-bottom:3px solid rgba(255,199,44,.55);
  box-shadow:0 20px 40px -24px rgba(11,29,58,.55);
}
.tia-book-soon-kicker{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--insight);
}
.tia-book-soon-title{
  font-family:var(--serif);font-size:24px;line-height:1.18;color:#FAFAF8;
  text-wrap:balance;
}
.tia-book-soon-foot{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.04em;
  color:rgba(255,255,255,.7);
  padding-top:10px;border-top:1px solid rgba(255,199,44,.4);
}

/* --- Libros (varios) — tarjetas horizontales apiladas --- */
.tia-books-list{display:flex;flex-direction:column;gap:16px}
.tia-book-card{
  display:grid;grid-template-columns:104px minmax(0,1fr);gap:28px;align-items:center;
  background:var(--paper);border:1px solid var(--rule);padding:22px 26px;
  text-decoration:none;color:var(--ink);transition:border-color .18s ease;
}
.tia-book-card:hover{border-color:var(--navy)}
.tia-book-card-cover{position:relative;display:block}
.tia-book-card-cover img{
  display:block;width:100%;height:auto;
  box-shadow:0 16px 32px -20px rgba(11,29,58,.55);
}
.tia-book-card-body{display:flex;flex-direction:column;gap:5px;min-width:0}
.tia-book-card-eyebrow{
  font-family:var(--sans);font-size:10px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--amber-2);
}
.tia-book-card-title{
  font-family:var(--serif);font-size:23px;line-height:1.14;
  color:var(--navy);letter-spacing:-.01em;
}
.tia-book-card:hover .tia-book-card-title{color:var(--amber-2)}
.tia-book-card-sub{
  font-family:var(--serif);font-style:italic;font-size:14px;
  line-height:1.3;color:var(--ink-2);
}
.tia-book-card-lede{
  font-family:var(--sans);font-size:13.5px;line-height:1.55;
  color:var(--ink-2);margin-top:4px;max-width:64ch;
}
.tia-book-card-foot{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;margin-top:10px;
}
.tia-book-card-meta{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-family:var(--mono);font-size:11px;color:var(--muted);
}
.tia-book-card-meta > span{white-space:nowrap}
.tia-book-card-meta .dot{opacity:.6}
.tia-book-card-go{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--sans);font-size:12px;font-weight:600;color:var(--ink-2);
}
.tia-book-card:hover .tia-book-card-go{color:var(--navy)}

/* --- Cursos: lista tabular --- */
.tia-courses{display:flex;flex-direction:column;border-top:1px solid var(--rule)}
.tia-course{
  display:grid;
  grid-template-columns: 1fr 150px 110px 100px;
  gap:20px;align-items:center;
  padding:16px 14px;border-bottom:1px solid var(--rule);
  text-decoration:none;color:var(--ink);
  transition:background .15s ease;
}
.tia-course:hover{background:var(--paper)}
.tia-course-name{display:flex;align-items:center;gap:10px;min-width:0}
.tia-course-name .t{
  font-family:var(--serif);font-size:16px;line-height:1.25;color:var(--navy);
}
.tia-course:hover .tia-course-name .t{color:var(--amber-2)}
.tia-course-new{
  font-family:var(--sans);font-size:9.5px;font-weight:700;letter-spacing:.1em;
  text-transform:uppercase;color:var(--on-amber);background:var(--insight);
  padding:3px 7px;flex:none;
}
.tia-course-sub{
  font-family:var(--sans);font-size:12px;color:var(--ink-2);
}
.tia-course-type{
  font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.04em;
}
.tia-course-go{
  display:inline-flex;align-items:center;gap:8px;justify-self:end;
  font-family:var(--sans);font-size:12px;font-weight:600;color:var(--ink-2);
}
.tia-course-go .ic{width:16px;height:16px;color:currentColor}
.tia-course-go .ic svg{width:100%;height:100%;stroke:currentColor;fill:none}
.tia-course:hover .tia-course-go{color:var(--navy)}

/* --- Conferencia destacada (una) --- */
.tia-talk-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}

/* --- Otros temas (cross-links) · adaptación del componente de la home --- */
.tia-other-themes-wrap{
  background:var(--bg);
  color:var(--ink);
  border-top:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
}
.tia-other-themes{
  margin-top:0;
  padding:38px 32px 44px;
}
.tia-other-themes .section-label{
  margin-bottom:18px;
}
.tia-other-themes .themes-grid{
  grid-template-columns:repeat(3,minmax(0,1fr));
  align-items:stretch;
}
.tia-other-theme{
  min-height:190px;
  color:var(--ink);
  text-decoration:none;
}
.tia-other-theme-top{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
}
.tia-other-theme-number{
  font-family:var(--mono);
  font-size:11px;
  color:var(--muted);
  letter-spacing:.08em;
  text-transform:uppercase;
}
.tia-other-theme .ic{
  color:var(--insight);
  flex:none;
}
.tia-other-theme .theme-link{
  margin-top:auto;
  align-self:flex-start;
}

/* --- Responsive --- */
@media (max-width:1080px){
  .tia-hero-inner{grid-template-columns:1fr;gap:36px}
  .tia-hero-index{max-width:420px}
  .tia-feature{grid-template-columns:260px minmax(0,1fr);gap:28px}
  .tia-feature.book{grid-template-columns:170px minmax(0,1fr)}
}
@media (max-width:820px){
  .tia-hero-title{font-size:42px}
  .tia-feature{grid-template-columns:1fr;gap:22px}
  .tia-feature-media{max-width:300px}
  .tia-feature.book .tia-feature-media{max-width:180px}
  .tia-course{grid-template-columns:1fr auto;gap:6px 16px}
  .tia-course-sub,.tia-course-type{display:none}
}
@media (max-width:720px){
  .tia-other-themes .themes-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:560px){
  .tia-hero-inner{padding:8px 16px 28px}
  .tia-hero-title{font-size:34px}
  .tia-other-themes{padding:34px 16px 38px}
  .tia-other-themes .themes-grid{grid-template-columns:1fr}
  .tia-book-card{grid-template-columns:80px minmax(0,1fr);gap:18px;padding:18px}
  .tia-book-card-lede{display:none}
}