/* ================================================================
   DCA — Article Template Styles  v1.0
   Referencia estética: McKinsey Insights · Bain Insights · BCG
   Extiende styles.css (variables, nav, footer, btn ya definidos)
   ================================================================ */

/* ── Fix: art-body demasiado alto para el threshold 0.18 del IO ──
   El IntersectionObserver en app.js usa threshold:0.18 — requiere que
   el 18% del elemento sea visible. Un cuerpo de artículo de 4000+ px
   nunca supera ese ratio y se queda en opacity:0 indefinidamente.
   Solución: forzar visibilidad en el wrapper del cuerpo del artículo. */
.art-body[data-reveal],
.art-body[data-reveal].in {
  opacity: 1 !important;
  transform: none !important;
  transition: none !important;
}

/* ── Utilidades de columna ────────────────────────────────────── */
.art-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
}
.art-inner--wide {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
}

/* ── Encabezado del artículo ──────────────────────────────────── */
.art-header {
  background: var(--white);
  padding: 96px 0 48px;
  border-bottom: 1px solid rgba(30, 42, 56, 0.07);
}

.art-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-family: var(--body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(30, 42, 56, 0.5);
}
.art-breadcrumb a {
  color: var(--teal);
  text-decoration: none;
  transition: opacity 200ms ease;
}
.art-breadcrumb a:hover { opacity: 0.7; }
.art-breadcrumb span[aria-hidden] { opacity: 0.35; }

/* Category badge */
.art-cat {
  display: inline-flex;
  align-items: center;
  font-family: var(--body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}
.art-cat--field {
  background: rgba(46, 139, 118, 0.1);
  color: var(--teal);
  border: 1px solid rgba(46, 139, 118, 0.22);
}
.art-cat--frame {
  background: rgba(164, 129, 17, 0.08);
  color: var(--gold);
  border: 1px solid rgba(164, 129, 17, 0.22);
}
.art-cat--trend {
  background: rgba(30, 42, 56, 0.06);
  color: rgba(30, 42, 56, 0.65);
  border: 1px solid rgba(30, 42, 56, 0.14);
}

/* H1 */
.art-title {
  font-family: var(--display);
  font-size: clamp(26px, 3.2vw, 44px);
  color: var(--carbon);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  max-width: 20ch;
}
.art-title .line { display: block; }

/* Lead paragraph */
.art-lead {
  font-family: var(--body);
  font-size: clamp(16px, 1.6vw, 19px);
  color: rgba(30, 42, 56, 0.78);
  line-height: 1.65;
  max-width: 640px;
  margin: 0 0 32px;
  font-weight: 400;
}

/* Byline strip */
.art-byline {
  display: flex;
  align-items: center;
  gap: 14px;
}
.art-byline__photo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--platinum);
}
.art-byline__info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.art-byline__name {
  font-family: var(--body);
  font-size: 14px;
  font-weight: 600;
  color: var(--carbon);
}
.art-byline__role {
  font-family: var(--body);
  font-size: 12px;
  color: rgba(30, 42, 56, 0.55);
}
.art-byline__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--body);
  font-size: 12px;
  color: rgba(30, 42, 56, 0.45);
  margin-top: 2px;
}
.art-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(30, 42, 56, 0.35);
  display: inline-block;
}

/* ── Hero image ───────────────────────────────────────────────── */
.art-hero {
  width: 100%;
  aspect-ratio: 16 / 6.5;
  overflow: hidden;
  background: var(--platinum);
}
.art-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ── Cuerpo del artículo ──────────────────────────────────────── */
.art-body {
  padding: 64px 0 72px;
  background: var(--white);
}

/* H2 — secciones principales con barra oro izquierda */
.art-body h2 {
  font-family: var(--display);
  font-size: clamp(19px, 2vw, 26px);
  color: var(--carbon);
  line-height: 1.25;
  margin: 56px 0 20px;
  padding-left: 18px;
  border-left: 3px solid var(--gold);
  letter-spacing: -0.01em;
}
.art-body h2:first-child { margin-top: 0; }

/* H3 — etiquetas de sección, uppercase teal */
.art-body h3 {
  font-family: var(--body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 40px 0 14px;
}

/* Párrafos de cuerpo */
.art-body p {
  font-family: var(--body);
  font-size: clamp(15px, 1.2vw, 17px);
  color: var(--carbon);
  line-height: 1.78;
  margin: 0 0 24px;
  font-weight: 400;
}

/* ── CTA inline en cuerpo del artículo ───────────────────────── */
.art-inline-cta {
  display: inline-block;
  color: var(--teal);
  font-family: var(--body);
  font-size: clamp(15px, 1.2vw, 17px);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--teal);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s cubic-bezier(0.34,1.56,0.64,1);
}
.art-inline-cta:hover {
  color: #1f6657;
  border-color: #1f6657;
  transform: translateX(3px);
}

/* ── Lista con bullets oro ────────────────────────────────────── */
.art-body ul {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
}
.art-body ul li {
  font-family: var(--body);
  font-size: clamp(15px, 1.2vw, 17px);
  color: var(--carbon);
  line-height: 1.65;
  padding-left: 22px;
  position: relative;
  margin-bottom: 14px;
}
.art-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
}

/* ── Lista numerada con cifras teal ───────────────────────────── */
.art-body ol {
  list-style: none;
  counter-reset: art-ol;
  padding: 0;
  margin: 0 0 32px;
}
.art-body ol li {
  counter-increment: art-ol;
  font-family: var(--body);
  font-size: clamp(15px, 1.2vw, 17px);
  color: var(--carbon);
  line-height: 1.65;
  padding-left: 44px;
  position: relative;
  margin-bottom: 20px;
}
.art-body ol li::before {
  content: counter(art-ol, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--display);
  font-size: 14px;
  color: var(--teal);
  line-height: 1.65;
  opacity: 0.9;
}

/* ── Pull quote ───────────────────────────────────────────────── */
.art-quote {
  border-left: 4px solid var(--gold);
  padding: 20px 28px;
  margin: 52px 0;
  background: transparent;
}
.art-quote p {
  font-family: var(--display);
  font-style: italic;
  font-size: clamp(18px, 1.9vw, 24px);
  color: var(--carbon);
  line-height: 1.45;
  margin: 0 0 14px;
}
.art-quote cite {
  font-family: var(--body);
  font-size: 12px;
  color: rgba(30, 42, 56, 0.55);
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: block;
}

/* ── Caja de puntos clave (fondo carbón) ───────────────────────  */
.art-insights {
  background: var(--carbon);
  border-radius: 10px;
  padding: 28px 32px;
  margin-bottom: 48px;
}
.art-insights__label {
  font-family: var(--body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: 18px;
}
.art-insights ul {
  margin: 0;
}
.art-insights ul li {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  margin-bottom: 12px;
  line-height: 1.6;
}
.art-insights ul li::before {
  background: var(--gold);
  top: 8px;
}
.art-insights ul li:last-child { margin-bottom: 0; }

/* ── Estadísticas (grid platinum) ─────────────────────────────── */
.art-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin: 48px 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(30, 42, 56, 0.08);
}
.art-stat {
  background: var(--platinum);
  padding: 28px 20px;
  text-align: center;
}
.art-stat__num {
  display: block;
  font-family: var(--display);
  font-size: clamp(28px, 3.5vw, 42px);
  color: var(--teal);
  line-height: 1;
  margin-bottom: 10px;
}
.art-stat__label {
  font-family: var(--body);
  font-size: 12px;
  color: rgba(30, 42, 56, 0.6);
  line-height: 1.45;
  font-weight: 400;
}

/* ── Caja callout / implicación práctica ─────────────────────── */
.art-callout {
  background: rgba(46, 139, 118, 0.05);
  border-left: 4px solid var(--teal);
  border-radius: 0 8px 8px 0;
  padding: 22px 26px;
  margin: 36px 0;
}
.art-callout__label {
  display: block;
  font-family: var(--body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 10px;
}
.art-callout p {
  font-size: 15px;
  margin: 0;
  line-height: 1.65;
}

/* Divider */
.art-divider {
  border: none;
  border-top: 1px solid rgba(30, 42, 56, 0.08);
  margin: 52px 0;
}

/* ── Tags ─────────────────────────────────────────────────────── */
.art-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid rgba(30, 42, 56, 0.08);
}
.art-tag {
  font-family: var(--body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: rgba(30, 42, 56, 0.6);
  background: var(--platinum);
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid rgba(30, 42, 56, 0.1);
}

/* ── Bios del autor ──────────────────────────────────────────── */
.art-author-section {
  background: var(--platinum);
  padding: 56px 0;
  border-top: 1px solid rgba(30, 42, 56, 0.08);
}
.art-author-card {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 32px;
  background: var(--white);
  border-radius: 10px;
  border: 1px solid rgba(30, 42, 56, 0.08);
}
.art-author__photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--platinum);
}
.art-author__info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.art-author__name {
  font-family: var(--display);
  font-size: 20px;
  color: var(--carbon);
}
.art-author__role {
  font-family: var(--body);
  font-size: 13px;
  color: var(--teal);
  font-weight: 500;
  margin-bottom: 8px;
}
.art-author__bio {
  font-family: var(--body);
  font-size: 14px;
  color: rgba(30, 42, 56, 0.7);
  line-height: 1.65;
  margin: 0;
}

/* ── CTA del artículo ─────────────────────────────────────────── */
.art-cta {
  background: var(--teal);
  padding: 72px 0;
  text-align: center;
}
.art-cta .label {
  color: rgba(255, 255, 255, 0.65);
  display: block;
  margin-bottom: 16px;
}
.art-cta__h2 {
  font-family: var(--display);
  font-size: clamp(22px, 2.4vw, 32px);
  color: var(--white);
  line-height: 1.25;
  margin: 0 auto 16px;
  max-width: 600px;
}
.art-cta__p {
  font-family: var(--body);
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 480px;
  margin: 0 auto 32px;
  line-height: 1.6;
}
.art-cta__note {
  font-family: var(--body);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 16px;
  letter-spacing: 0.04em;
}
.btn--gold {
  background: var(--gold);
  color: var(--white);
  border: none;
  padding: 14px 32px;
  border-radius: 6px;
  font-family: var(--body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 200ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 200ms ease;
}
.btn--gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(164, 129, 17, 0.3);
}

/* ── Artículos relacionados ───────────────────────────────────── */
.art-related {
  background: var(--white);
  padding: 72px 0 80px;
  border-top: 1px solid rgba(30, 42, 56, 0.08);
}
.art-related__title {
  font-family: var(--display);
  font-size: clamp(20px, 2vw, 26px);
  color: var(--carbon);
  margin: 0 0 40px;
}
.art-related__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.art-rel-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  background: var(--white);
  border: 1px solid rgba(30, 42, 56, 0.09);
  border-radius: 10px;
  overflow: hidden;
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 300ms ease;
}
.art-rel-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(30, 42, 56, 0.1);
}
.art-rel-card__img {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--platinum);
}
.art-rel-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 400ms ease;
}
.art-rel-card:hover .art-rel-card__img img {
  transform: scale(1.04);
}
.art-rel-card__body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.art-rel-card__title {
  font-family: var(--display);
  font-size: 16px;
  color: var(--carbon);
  line-height: 1.35;
  margin: 0;
  flex: 1;
}
.art-rel-card__meta {
  font-family: var(--body);
  font-size: 12px;
  color: rgba(30, 42, 56, 0.5);
  margin: 0;
}
.art-related__more {
  margin-top: 40px;
  text-align: center;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 1023px) {
  .art-related__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 767px) {
  .art-header { padding: 88px 0 40px; }
  .art-hero { aspect-ratio: 4 / 3; }
  .art-stats { grid-template-columns: 1fr; gap: 1px; }
  .art-related__grid { grid-template-columns: 1fr; }
  .art-body h2 { margin-top: 40px; }
  .art-insights { padding: 22px 22px; }
  .art-author-card { flex-direction: column; gap: 18px; }
}
@media (max-width: 479px) {
  .art-title { font-size: clamp(22px, 7vw, 30px); }
  .art-cta { padding: 56px 0; }
}

/* ── Accesibilidad ────────────────────────────────────────────── */
.art-rel-card:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}
@media (prefers-reduced-motion: reduce) {
  .art-rel-card,
  .art-rel-card__img img,
  .btn--gold { transition: none !important; transform: none !important; }
}

/* ── AI Return Pulse — formulario compacto inline (artículos) ── */
.art-pulse {
  background: var(--platinum, #f3f3f3);
  padding: 52px 0;
  border-top: 1px solid rgba(0,0,0,0.06);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.art-pulse__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: 860px;
  margin: 0 auto;
}
.art-pulse__title {
  font-family: 'Marcellus', serif;
  font-size: clamp(22px, 2vw, 28px);
  color: var(--carbon, #1e2a38);
  margin: 6px 0 10px;
  line-height: 1.2;
}
.art-pulse__desc {
  font-size: 15px;
  font-weight: 300;
  color: var(--carbon, #1e2a38);
  opacity: 0.75;
  line-height: 1.6;
  margin: 0;
}
.art-pulse__row {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}
.art-pulse__input {
  flex: 1;
  height: 48px;
  padding: 0 16px;
  font-family: 'Montserrat', sans-serif;
  font-size: 15px;
  border: 1.5px solid rgba(46,139,118,0.3);
  border-radius: 8px;
  background: #fff;
  color: var(--carbon, #1e2a38);
  outline: none;
  transition: border-color 0.2s;
}
.art-pulse__input:focus {
  border-color: var(--teal, #2e8b76);
}
.art-pulse__input[aria-invalid="true"] {
  border-color: #c2593f;
}
.art-pulse__btn {
  white-space: nowrap;
  height: 48px;
  padding: 0 24px;
}
.art-pulse__error {
  font-size: 13px;
  color: #c2593f;
  margin: 6px 0 0;
}
.art-pulse__error[hidden] { display: none; }
.art-pulse__success {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--teal, #2e8b76);
  font-size: 15px;
  font-weight: 500;
  padding: 12px 0;
}
.art-pulse__success[hidden] { display: none; }
.art-pulse__success svg { flex-shrink: 0; }
@media (max-width: 767px) {
  .art-pulse { padding: 40px 0; }
  .art-pulse__inner { grid-template-columns: 1fr; gap: 20px; }
  .art-pulse__row { flex-direction: column; }
  .art-pulse__btn { width: 100%; height: 52px; }
}
@media (prefers-reduced-motion: reduce) {
  .art-pulse__input { transition: none; }
}