/* ================= FLIP BASE ================= */

.flip-card {
  perspective: 1200px;
  width: 100%;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 720px; /* DESKTOP */
  transition: transform 0.8s ease;
  transform-style: preserve-3d;
}

/* Giro desktop / tablet */
.flip-card.flip .flip-card-inner {
  transform: rotateY(180deg);
}

/* ================= CARAS ================= */

.flip-front,
.flip-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
}

.flip-back {
  transform: rotateY(180deg);
}

/* ================= PLAN SELECTOR ================= */

.plan-selector {
  display: inline-flex;
  border-radius: 30px;
  background: #f1f3f5;
  padding: 6px;
  gap: 5px;
}

.plan-btn {
  border: none;
  background: transparent;
  padding: 8px 18px;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  color: #555;
}

.plan-btn.active {
  background: #007bff;
  color: #fff;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* ================= TABLET ================= */

@media (max-width: 991px) {
  .flip-card-inner {
    height: 680px;
  }
}

/* ================= MOBILE (CLAVE) ================= */

@media (max-width: 768px) {
  /* Quitamos 3D */
  .flip-card {
    perspective: none;
  }

  .flip-card-inner {
    height: auto;
    transform: none !important;
  }

  /* Layout normal */
  .flip-front,
  .flip-back {
    position: relative;
    transform: none;
    backface-visibility: visible;
  }

  /* Toggle por clases */
  .flip-back {
    display: none;
  }

  .flip-card.show-back .flip-front {
    display: none;
  }

  .flip-card.show-back .flip-back {
    display: block;
  }
}