/* ============================================================
   INSEIN SRL — Sprint 3 CSS
   Nosotros rediseñado, Equipo por disciplina, Certificaciones
   con acordeón, Timeline corporativo
   ============================================================ */

/* ─────────────────────────────────────────────
   NOSOTROS — Rediseño completo (reemplaza .about)
───────────────────────────────────────────── */
.about-s3 {
  padding: 120px 0 0;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}

/* Texto decorativo de fondo */
.about-s3-bg-text {
  position: absolute;
  top: 40px;
  left: -20px;
  font-family: var(--font-display);
  font-size: clamp(80px, 14vw, 180px);
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px rgba(108, 127, 136, 0.08);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  line-height: 1;
}

/* Header editorial — ocupa ancho completo */
.about-s3-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 80px;
  position: relative;
  z-index: 1;
}

@media (min-width: 1024px) {
  .about-s3-header {
    grid-template-columns: 1fr 1fr;
    align-items: end;
    gap: 80px;
  }
}

.about-s3-eyebrow {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.about-s3-year {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 900;
  color: var(--green);
  opacity: 0.25;
  line-height: 1;
  letter-spacing: -0.02em;
}

.about-s3-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 6.5rem);
  font-weight: 900;
  text-transform: uppercase;
  line-height: 0.88;
  letter-spacing: -0.01em;
}

.about-s3-title .line-green { color: var(--green); }
.about-s3-title .line-italic { font-style: italic; }
.about-s3-title .line-outline {
  color: transparent;
  -webkit-text-stroke: 2px rgba(254,254,254,0.15);
}

.about-s3-intro {
  font-size: 1rem;
  color: var(--steel-light);
  line-height: 1.8;
  max-width: 480px;
  margin-bottom: 36px;
}

/* Misión / Visión / Valores — tabs compactos */
.mvv-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 20px;
}

.mvv-tab {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 8px 18px;
  border: 1px solid var(--border-dim);
  color: var(--steel);
  border-radius: var(--radius);
  transition: var(--transition);
}

.mvv-tab.active {
  background: var(--green);
  color: var(--dark);
  border-color: var(--green);
}

.mvv-tab:hover:not(.active) {
  border-color: var(--green);
  color: var(--green);
}

.mvv-panels { position: relative; min-height: 100px; }

.mvv-panel {
  display: none;
  font-size: 0.88rem;
  color: var(--steel-light);
  line-height: 1.8;
  border-left: 2px solid var(--green);
  padding-left: 20px;
  animation: fadePanel 0.4s ease;
}

.mvv-panel.active { display: block; }

@keyframes fadePanel {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Imagen lado derecho del header */
.about-s3-visual {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 4px;
}

.about-s3-img {
  overflow: hidden;
  background: var(--surface);
}

.about-s3-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%) brightness(0.75);
  transition: filter 0.6s ease, transform 0.8s ease;
}

.about-s3-img:hover img {
  filter: grayscale(0%) brightness(0.9);
  transform: scale(1.04);
}

.about-s3-img:nth-child(1) {
  grid-column: span 2;
  height: 260px;
}

.about-s3-img:nth-child(2) { height: 160px; }
.about-s3-img:nth-child(3) { height: 160px; }

/* Overlay con dato en la primera imagen */
.about-s3-img-badge {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: var(--green);
  color: var(--dark);
  padding: 12px 20px;
  z-index: 2;
}

.about-s3-img-badge .num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 900;
  display: block;
  line-height: 1;
}

.about-s3-img-badge .lbl {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: block;
}

/* ─────────────────────────────────────────────
   TIMELINE CORPORATIVO
───────────────────────────────────────────── */
.timeline {
  padding: 80px 0;
  background: var(--dark);
  border-top: 1px solid var(--border-dim);
  position: relative;
}

.timeline-track {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 60px;
}

@media (min-width: 768px) {
  .timeline-track { flex-direction: row; align-items: flex-start; }
}

/* Línea horizontal en desktop */
.timeline-track::before {
  content: '';
  position: absolute;
  background: linear-gradient(90deg, var(--green), rgba(110,214,14,0.2), transparent);
  height: 1px;
  top: 20px;
  left: 0;
  right: 0;
  display: none;
}

@media (min-width: 768px) { .timeline-track::before { display: block; } }

/* Línea vertical en mobile */
.timeline-track::after {
  content: '';
  position: absolute;
  background: linear-gradient(to bottom, var(--green), rgba(110,214,14,0.2), transparent);
  width: 1px;
  left: 20px;
  top: 0;
  bottom: 0;
}

@media (min-width: 768px) { .timeline-track::after { display: none; } }

.timeline-item {
  flex: 1;
  position: relative;
  padding: 0 0 48px 56px;
}

@media (min-width: 768px) {
  .timeline-item {
    padding: 52px 24px 0 0;
  }
}

.timeline-dot {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(110,214,14,0.15);
  left: 16px;
  top: 4px;
}

@media (min-width: 768px) {
  .timeline-dot {
    left: 0;
    top: 16px;
  }
}

.timeline-year {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--green);
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}

.timeline-event {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 6px;
}

.timeline-desc {
  font-size: 0.78rem;
  color: var(--steel);
  line-height: 1.6;
}

/* ─────────────────────────────────────────────
   EQUIPO POR DISCIPLINA
───────────────────────────────────────────── */
.team {
  padding: 120px 0;
  background: var(--dark-2);
  position: relative;
}

.team::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
}

.team-intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 80px;
}

@media (min-width: 1024px) {
  .team-intro {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.team-intro-desc {
  font-size: 0.9rem;
  color: var(--steel-light);
  line-height: 1.8;
  max-width: 480px;
}

.team-total {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border-dim);
  border-left: 3px solid var(--green);
}

.team-total-num {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 900;
  color: var(--green);
  line-height: 1;
  white-space: nowrap;
}

.team-total-text {
  font-size: 0.8rem;
  color: var(--steel-light);
  line-height: 1.6;
}

.team-total-text strong {
  display: block;
  font-size: 0.9rem;
  color: var(--white);
  font-weight: 700;
  margin-bottom: 4px;
}

/* Grid de disciplinas */
.team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
}

@media (min-width: 640px) { .team-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .team-grid { grid-template-columns: repeat(3, 1fr); } }

.team-card {
  background: var(--surface);
  border: 1px solid var(--border-dim);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.team-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}

.team-card:hover {
  border-color: var(--border);
  transform: translateY(-4px);
}

.team-card:hover::before { transform: scaleX(1); }

.team-card-icon {
  width: 52px;
  height: 52px;
  background: var(--green-glow);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green);
  margin-bottom: 20px;
  transition: background var(--transition);
}

.team-card:hover .team-card-icon { background: rgba(110,214,14,0.2); }

.team-card-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--white);
  margin-bottom: 8px;
  line-height: 1.1;
}

.team-card-count {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
  display: block;
  margin-bottom: 16px;
}

.team-card-desc {
  font-size: 0.8rem;
  color: var(--steel-light);
  line-height: 1.6;
  margin-bottom: 20px;
}

.team-card-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.team-skill-tag {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  background: var(--dark);
  border: 1px solid var(--border-dim);
  color: var(--steel-light);
  border-radius: var(--radius);
}

/* Número decorativo fondo de la card */
.team-card-bg-num {
  position: absolute;
  bottom: -10px;
  right: 16px;
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px rgba(110,214,14,0.06);
  pointer-events: none;
  user-select: none;
  line-height: 1;
}

/* ─────────────────────────────────────────────
   CERTIFICACIONES — Acordeón expandido (reemplaza .certs)
───────────────────────────────────────────── */
.certs-s3 {
  padding: 120px 0;
  background: var(--dark);
  position: relative;
}

.certs-s3-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 80px;
  margin-top: 60px;
}

@media (min-width: 1024px) {
  .certs-s3-grid { grid-template-columns: 1fr 1fr; align-items: start; }
}

/* Acordeón de normativas */
.cert-accordion {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cert-item {
  background: var(--surface);
  border: 1px solid var(--border-dim);
  overflow: hidden;
  transition: border-color var(--transition);
}

.cert-item.open { border-color: var(--border); }

.cert-item-header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 28px;
  cursor: pointer;
  user-select: none;
}

.cert-item-badge {
  width: 60px;
  height: 44px;
  background: var(--green-glow);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--green);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  transition: background var(--transition);
}

.cert-item.open .cert-item-badge { background: var(--green); color: var(--dark); }

.cert-item-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--white);
  flex: 1;
  line-height: 1.1;
}

.cert-item-sub {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel);
  display: block;
  margin-top: 2px;
}

.cert-item-arrow {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-dim);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--steel);
  transition: var(--transition);
  flex-shrink: 0;
}

.cert-item.open .cert-item-arrow {
  background: var(--green);
  border-color: var(--green);
  color: var(--dark);
  transform: rotate(180deg);
}

.cert-item-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.cert-item.open .cert-item-body { max-height: 400px; }

.cert-item-content {
  padding: 0 28px 28px;
  border-top: 1px solid var(--border-dim);
  padding-top: 20px;
}

.cert-item-desc {
  font-size: 0.82rem;
  color: var(--steel-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.cert-item-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cert-item-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--steel-light);
  line-height: 1.5;
}

.cert-item-list li::before {
  content: '';
  display: block;
  width: 16px;
  height: 1px;
  background: var(--green);
  margin-top: 10px;
  flex-shrink: 0;
}

/* Panel derecho — por qué importan las normas */
.certs-s3-why {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.certs-why-card {
  background: var(--surface);
  border: 1px solid var(--border-dim);
  padding: 28px;
  transition: border-color var(--transition);
}

.certs-why-card:first-child {
  background: var(--green);
  border-color: var(--green);
  padding: 36px 28px;
}

.certs-why-card:hover:not(:first-child) { border-color: var(--border); }

.certs-why-num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  color: var(--green);
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}

.certs-why-card:first-child .certs-why-num { color: var(--dark); font-size: 4rem; }

.certs-why-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--steel-light);
  display: block;
  margin-bottom: 6px;
}

.certs-why-card:first-child .certs-why-label { color: rgba(13,15,18,0.7); }

.certs-why-text {
  font-size: 0.8rem;
  color: var(--steel);
  line-height: 1.6;
}

.certs-why-card:first-child .certs-why-text { color: rgba(13,15,18,0.65); }

/* ─────────────────────────────────────────────
   RESPONSIVE SPRINT 3
───────────────────────────────────────────── */
@media (max-width: 640px) {
  .about-s3-bg-text { display: none; }
  .about-s3-visual { grid-template-columns: 1fr; }
  .about-s3-img:nth-child(1) { grid-column: span 1; height: 220px; }
  .team-total { flex-direction: column; align-items: flex-start; }
  .cert-item-header { padding: 18px 20px; }
  .cert-item-content { padding: 0 20px 20px; padding-top: 16px; }
}