/* ============================================================
   SECCIÓN 4: SECCIÓN PRINCIPAL ISO 37001
   Mismo sistema visual: Cormorant Garamond / Cormorant SC,
   negro absoluto + gris platino reservado para líneas, tipografía y detalle fino.
   Requiere Tabler Icons enlazado en el <head> (clases "ti ti-*").
   ============================================================ */

.iso-section {
  --iso-font-display: 'Cormorant Garamond', 'Times New Roman', serif;
  --iso-font-caps: 'Cormorant SC', 'Cormorant Garamond', serif;

  --iso-black: #0A0706;
  --iso-black-2: #050302;
  --iso-black-3: #120C0A;

  --iso-platinum-500: #9AA0A8;
  --iso-platinum-400: #CBD1D8;

  --iso-ink: #F1E1DB;
  --iso-ink-muted: rgba(241, 225, 219, 0.56);
  --iso-ink-faint: rgba(241, 225, 219, 0.3);

  background: var(--iso-black);
  padding: 110px 24px;
  font-family: var(--iso-font-display);
}

.iso-section .wrap {
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

/* ── Columna izquierda ── */
.iso-section .tag {
  font-family: var(--iso-font-caps);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--iso-platinum-400);
  margin: 0 0 18px;
}

.iso-section .h1 {
  font-family: var(--iso-font-display);
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 600;
  color: var(--iso-ink);
  line-height: 0.98;
  letter-spacing: 0.01em;
  margin: 0 0 22px;
}
.iso-section .h1 span {
  color: var(--iso-platinum-400);
  font-style: italic;
}

.iso-section .sub {
  font-size: 1.08rem;
  color: var(--iso-ink-muted);
  line-height: 1.75;
  max-width: 42ch;
  margin: 0 0 36px;
}

.iso-section .stats {
  display: flex;
  gap: 32px;
  padding: 24px 0;
  margin-bottom: 36px;
  border-top: 1px solid rgba(203,209,216,0.2);
  border-bottom: 1px solid rgba(203,209,216,0.2);
}

.iso-section .stat-val {
  font-family: var(--iso-font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--iso-ink);
  line-height: 1.2;
}
.iso-section .stat-accent {
  color: var(--iso-platinum-400);
  font-style: italic;
}

.iso-section .stat-lbl {
  font-family: var(--iso-font-caps);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--iso-ink-faint);
  margin-top: 4px;
}

.iso-section .ctas {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.iso-section .btn-main {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 3px;
  background: var(--iso-black-3);
  color: var(--iso-platinum-400);
  border: 1px solid var(--iso-platinum-500);
  font-family: var(--iso-font-caps);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: background 0.22s, border-color 0.22s, box-shadow 0.22s;
}
.iso-section .btn-main:hover {
  background: var(--iso-black-2);
  border-color: var(--iso-platinum-400);
  box-shadow: 0 6px 22px rgba(203,209,216,0.22);
}

.iso-section .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--iso-font-caps);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--iso-ink-muted);
  text-decoration: none;
  transition: color 0.22s, gap 0.22s;
}
.iso-section .btn-ghost i { color: var(--iso-platinum-400); transition: transform 0.22s; }
.iso-section .btn-ghost:hover { color: var(--iso-ink); gap: 11px; }
.iso-section .btn-ghost:hover i { transform: translateX(3px); }

/* ── Columna derecha: lista de pilares ── */
.iso-section .right {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.iso-section .pilar {
  position: relative;
  background: var(--iso-black-3);
  border: 1px solid rgba(203,209,216,0.2);
  border-radius: 6px;
  padding: 18px 20px;
  cursor: pointer;
  transition: border-color 0.25s, background 0.25s;
}
.iso-section .pilar:hover {
  border-color: rgba(203,209,216,0.4);
}
.iso-section .pilar.active {
  border-color: var(--iso-platinum-400);
  background: var(--iso-black-2);
}

.iso-section .pilar-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.iso-section .pilar-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid rgba(203,209,216,0.45);
  color: var(--iso-platinum-400);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: transform 0.25s, box-shadow 0.25s;
}
.iso-section .pilar.active .pilar-icon {
  transform: scale(1.06);
  box-shadow: 0 0 16px rgba(203,209,216,0.28);
}

.iso-section .pilar-name {
  flex: 1;
  font-family: var(--iso-font-caps);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--iso-ink);
}

.iso-section .pilar-arrow {
  color: var(--iso-ink-faint);
  font-size: 15px;
  transition: transform 0.3s, color 0.3s;
}
.iso-section .pilar.active .pilar-arrow {
  transform: rotate(90deg);
  color: var(--iso-platinum-400);
}

.iso-section .pilar-body {
  font-size: 0.9rem;
  color: var(--iso-ink-muted);
  line-height: 1.6;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.3s ease, margin 0.35s ease;
  margin-top: 0;
}
.iso-section .pilar.active .pilar-body {
  max-height: 120px;
  opacity: 1;
  margin-top: 12px;
}

.iso-section .progress-bar {
  height: 3px;
  border-radius: 100px;
  background: rgba(203,209,216,0.14);
  overflow: hidden;
  margin-top: 14px;
}
.iso-section .progress-fill {
  height: 100%;
  width: 0;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--iso-platinum-500), var(--iso-platinum-400));
  transition: width 0.8s ease;
}
.iso-section .pilar.active .progress-fill {
  width: var(--pct);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .iso-section { padding: 80px 20px; }
  .iso-section .wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .iso-section .sub { max-width: 100%; }
  .iso-section .stats { flex-wrap: wrap; row-gap: 18px; }
}

@media (max-width: 480px) {
  .iso-section .ctas { flex-direction: column; align-items: flex-start; }
  .iso-section .btn-main { width: 100%; justify-content: center; }
}