/* ============================================================
   CERTIFICACIONES ISO — tarjetas cruzadas
   Mismo sistema visual: Cormorant Garamond / Cormorant SC,
   negro cálido + dorado (lot-ox) reservado para líneas, tipografía y detalle fino.
   ============================================================ */

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

  /* Tokens de marca — mismos valores que el hero de ISO 45001 */
  --lot-ox-900: #241C0D;
  --lot-ox-700: #6B4F14;
  --lot-ox-500: #B3841F;
  --lot-ox-400: #D9A62E;
  --lot-ox-300: #E6C158;
  --lot-ox-200: #F0D689;
  --lot-ox-100: #FBF0D6;

  --cert-black: #100D06;
  --cert-black-2: #0A0703;

  --cert-platinum-500: var(--lot-ox-400);
  --cert-platinum-400: var(--lot-ox-200);

  --cert-ink: var(--lot-ox-100);
  --cert-ink-muted: rgba(251, 240, 214, 0.62);
  --cert-ink-faint: rgba(251, 240, 214, 0.34);

  background: var(--cert-black);
  padding: 100px 24px;
  font-family: var(--cert-font-display);
}

.certs-section {
  max-width: 1160px;
  margin: 0 auto;
  text-align: center;
}

.certs-eyebrow {
  font-family: var(--cert-font-caps);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cert-platinum-400);
  margin: 0 0 14px;
  position: relative;
  padding-bottom: 12px;
}
.certs-eyebrow::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 1px;
  background: var(--cert-platinum-400);
}

.certs-title {
  font-family: var(--cert-font-display);
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 600;
  color: var(--cert-ink);
  line-height: 1.25;
  margin: 0 0 10px;
}

.certs-subtitle {
  font-family: var(--cert-font-caps);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--cert-ink-faint);
  margin: 0 0 52px;
}

/* ── Grid ── */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  text-align: left;
}

.flip-card {
  height: 320px;
  perspective: 1100px;
}

/* Enlace interno: hereda el mismo layout que la tarjeta, sin repetir la clase .flip-card
   (repetirla hacía que document.querySelectorAll('.flip-card') devolviera el doble de
   elementos de los esperados y desincronizaba el índice usado por el flip) */
.flip-card-link {
  display: block;
  position: relative;
  width: 100%;
  height: 100%;
  text-decoration: none;
  color: inherit;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Flip controlado por JS (clase) o por hover como respaldo */
.flip-card.flipped .flip-card-inner,
.flip-card.is-flipped .flip-card-inner {
  transform: rotateY(180deg);
}
@media (hover: hover) {
  .flip-card:hover .flip-card-inner { transform: rotateY(180deg); }
}

.flip-front,
.flip-back {
  position: absolute;
  inset: 0;
  border-radius: 4px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
}

/* ── Cara frontal ── */
.flip-front {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  padding: 26px 24px;
  border: 1px solid rgba(217, 166, 46, 0.28);
  background: linear-gradient(160deg, #1A1408 0%, var(--cert-black-2) 100%);
  transition: border-color 0.3s;
}
.flip-card:hover .flip-front { border-color: rgba(217, 166, 46, 0.5); }

/* Variación sutil de degradé por norma — mismo negro cálido, distinto ángulo/foco */
.iso-bg-14001 { background: linear-gradient(150deg, #1B1608 0%, var(--cert-black-2) 75%); }
.iso-bg-21001 { background: linear-gradient(200deg, #1B1608 0%, var(--cert-black-2) 75%); }
.iso-bg-9001  { background: linear-gradient(160deg, #1B1608 0%, var(--cert-black-2) 80%); }
.iso-bg-27001 { background: linear-gradient(210deg, #1B1608 0%, var(--cert-black-2) 80%); }
.iso-bg-37301 { background: linear-gradient(180deg, #1B1608 0%, var(--cert-black-2) 78%); }

.iso-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid rgba(217, 166, 46, 0.5);
  background: transparent;
  color: var(--cert-platinum-400);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
  transition: transform 0.3s, box-shadow 0.3s;
}
.flip-card:hover .iso-icon {
  transform: scale(1.06);
  box-shadow: 0 0 18px rgba(217, 166, 46, 0.32);
}

.iso-number {
  font-family: var(--cert-font-caps);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--cert-ink);
  margin-bottom: 6px;
}

.iso-label {
  font-family: var(--cert-font-display);
  font-style: italic;
  font-size: 1rem;
  color: var(--cert-ink-muted);
  line-height: 1.4;
}

.flip-hint {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--cert-font-caps);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--cert-ink-faint);
  margin-top: 18px;
}
.flip-hint i { font-size: 14px; color: var(--cert-platinum-400); }

/* ── Cara posterior ── */
.flip-back {
  background: linear-gradient(180deg, rgba(26,20,8,0.98), var(--cert-black-2));
  border: 1px solid rgba(217, 166, 46, 0.38);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 30px 26px;
  transform: rotateY(180deg);
}
.flip-back::before,
.flip-back::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-top: 1.5px solid rgba(217, 166, 46, 0.6);
  border-left: 1.5px solid rgba(217, 166, 46, 0.6);
  top: 10px;
  left: 10px;
}
.flip-back::after {
  top: auto;
  left: auto;
  bottom: 10px;
  right: 10px;
  border-top: none;
  border-left: none;
  border-bottom: 1.5px solid rgba(217, 166, 46, 0.6);
  border-right: 1.5px solid rgba(217, 166, 46, 0.6);
}

.back-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(217, 166, 46, 0.45);
  color: var(--cert-ink-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.25s, color 0.25s;
  z-index: 2;
}
.back-close:hover {
  border-color: var(--cert-platinum-400);
  color: var(--cert-platinum-400);
}

.back-badge {
  display: inline-block;
  font-family: var(--cert-font-caps);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  color: var(--cert-platinum-400);
  border: 1px solid rgba(217, 166, 46, 0.5);
  border-radius: 100px;
  padding: 5px 14px;
  margin-bottom: 16px;
}

.back-text {
  font-family: var(--cert-font-display);
  font-size: 0.92rem;
  color: var(--cert-ink-muted);
  line-height: 1.65;
  margin: 0 0 20px;
}

.back-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--cert-font-caps);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--cert-ink);
  text-decoration: none;
  transition: color 0.25s, gap 0.25s;
}
.back-cta i { color: var(--cert-platinum-400); transition: transform 0.25s; }
.back-cta:hover { color: var(--cert-platinum-400); gap: 11px; }
.back-cta:hover i { transform: translateX(3px); }
.cert-img {
  width: 100%;
  height: 130px;
  margin-bottom: 22px;
  border-radius: 6px;
  overflow: hidden;
  background: rgba(217, 166, 46, 0.05);
}

.cert-img img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
}
/* ── Responsive ── */
@media (max-width: 1180px) {
  .certs-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 980px) {
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .certs { padding: 72px 18px; }
  .certs-grid { grid-template-columns: 1fr; gap: 18px; }
  .flip-card { height: 300px; }
  .certs-subtitle { margin-bottom: 36px; }
}