/**
 * BeyondInfinity — 3D hover, stacked cards, carousel polish.
 */

/* Pricing grid (works with or without 3D stack) */
.ngi-pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  width: 100%;
}

.ngi-pricing:not(.ngi-pricing--3d) .bi-stack-3d {
  display: none;
}

/* ---- Pointer tilt wrapper ---- */
.bi-tilt-3d {
  transform-style: preserve-3d;
  will-change: transform;
}

.bi-tilt-3d__inner {
  transform-style: preserve-3d;
  transition: transform 0.2s ease-out, box-shadow 0.25s ease;
  border-radius: inherit;
  position: relative;
}

.bi-tilt-3d__inner::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(
    circle at var(--bi-glare-x, 50%) var(--bi-glare-y, 50%),
    rgba(255, 255, 255, 0.35) 0%,
    transparent 55%
  );
  transition: opacity 0.25s ease;
}

.bi-tilt-3d:hover .bi-tilt-3d__inner::after,
.bi-tilt-3d:focus-within .bi-tilt-3d__inner::after {
  opacity: 1;
}

.bi-3d-enabled .ngi-card.bi-tilt-3d:not(.bi-tilt-3d--decorative),
.bi-3d-enabled [data-bi-tilt].ngi-card:not(.bi-tilt-3d--decorative) {
  cursor: pointer;
}

.bi-tilt-3d--decorative {
  cursor: default;
}

.bi-3d-enabled .ngi-card-grid .ngi-card {
  transform-style: preserve-3d;
}

/* ---- 3D stacked cards ---- */
.bi-stack-3d {
  position: relative;
  min-height: 340px;
  perspective: 1400px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  max-width: 380px;
}

.bi-stack-3d__card {
  position: absolute;
  width: min(320px, 92vw);
  left: 50%;
  top: 50%;
  margin: 0;
  transform-origin: center center;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease, opacity 0.35s ease;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
  cursor: pointer;
  outline: none;
}

.bi-stack-3d__card:focus-visible {
  box-shadow: 0 0 0 3px var(--ngt-primary), 0 18px 40px rgba(15, 23, 42, 0.12);
}

.bi-stack-3d__card.is-featured {
  border-color: var(--ngt-primary);
}

.bi-stack-3d__meta {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ngt-primary);
  margin-bottom: 8px;
}

.bi-stack-3d__card:nth-child(1) {
  z-index: 1;
  transform: translate(-50%, -50%) rotate(-6deg) translateY(24px) translateZ(-40px);
}

.bi-stack-3d__card:nth-child(2) {
  z-index: 2;
  transform: translate(-50%, -50%) rotate(0deg) translateY(0) translateZ(0);
}

.bi-stack-3d__card:nth-child(3) {
  z-index: 3;
  transform: translate(-50%, -50%) rotate(5deg) translateY(-20px) translateZ(40px);
}

.bi-stack-3d__card:nth-child(4) {
  z-index: 4;
  transform: translate(-50%, -50%) rotate(8deg) translateY(-36px) translateZ(60px);
}

.bi-stack-3d.is-expanded .bi-stack-3d__card:nth-child(1),
.bi-stack-3d:hover .bi-stack-3d__card:nth-child(1),
.bi-stack-3d:focus-within .bi-stack-3d__card:nth-child(1) {
  transform: translate(calc(-50% - 110px), -50%) rotateY(18deg) rotate(-4deg) translateZ(30px);
}

.bi-stack-3d.is-expanded .bi-stack-3d__card:nth-child(2),
.bi-stack-3d:hover .bi-stack-3d__card:nth-child(2),
.bi-stack-3d:focus-within .bi-stack-3d__card:nth-child(2) {
  transform: translate(-50%, -52%) rotateY(0deg) translateZ(80px) scale(1.02);
}

.bi-stack-3d.is-expanded .bi-stack-3d__card:nth-child(3),
.bi-stack-3d:hover .bi-stack-3d__card:nth-child(3),
.bi-stack-3d:focus-within .bi-stack-3d__card:nth-child(3) {
  transform: translate(calc(-50% + 110px), -50%) rotateY(-18deg) rotate(4deg) translateZ(30px);
}

.bi-stack-3d.is-expanded .bi-stack-3d__card:nth-child(4),
.bi-stack-3d:hover .bi-stack-3d__card:nth-child(4),
.bi-stack-3d:focus-within .bi-stack-3d__card:nth-child(4) {
  transform: translate(calc(-50% + 160px), -48%) rotateY(-22deg) translateZ(10px);
  opacity: 0.85;
}

.bi-stack-3d__card:nth-child(n+5) {
  z-index: 5;
  transform: translate(-50%, -50%) rotate(10deg) translateY(-48px) translateZ(72px);
  opacity: 0.92;
}

.bi-stack-3d.is-expanded .bi-stack-3d__card:nth-child(n+5),
.bi-stack-3d:hover .bi-stack-3d__card:nth-child(n+5),
.bi-stack-3d:focus-within .bi-stack-3d__card:nth-child(n+5) {
  transform: translate(calc(-50% + 200px), -46%) rotateY(-24deg) translateZ(0);
  opacity: 0.75;
}

.bi-stack-3d__card.is-active {
  z-index: 10;
}

/* Pathways split layout */
.ngi-pathways-split {
  display: grid;
  gap: 40px;
  align-items: center;
}

@media (min-width: 960px) {
  .ngi-pathways-split {
    grid-template-columns: minmax(280px, 380px) 1fr;
    gap: 56px;
  }
}

/* Pricing 3D deck */
.ngi-pricing--3d {
  display: grid;
  gap: 32px;
  align-items: center;
}

@media (min-width: 1024px) {
  .ngi-pricing--3d {
    grid-template-columns: minmax(300px, 380px) 1fr;
    gap: 48px;
  }

  .ngi-pricing--3d .bi-stack-3d {
    min-height: 400px;
  }

  .ngi-pricing--3d .ngi-pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

/* ---- Carousel enhancements (kinetic home) ---- */
.bi-carousel-3d--kinetic {
  position: relative;
}

.bi-carousel-3d__glow {
  position: absolute;
  inset: 10% 15%;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(0, 102, 204, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.bi-carousel-3d__glow.is-active {
  opacity: 1;
  animation: bi-carousel-glow 8s ease-in-out infinite;
}

@keyframes bi-carousel-glow {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.7; }
  50% { transform: scale(1.08) rotate(180deg); opacity: 1; }
}

.ngi-section--tutors-3d .carousel-3d {
  height: 540px;
  perspective: 1800px;
  margin-top: 8px;
}

.ngi-section--tutors-3d .tutor-card3d {
  width: 340px;
}

.ngi-section--tutors-3d .carousel-3d__stage {
  transition: transform 0.35s ease-out;
}

.bi-carousel-nav--kinetic .carousel-arrow {
  background: var(--ngi-accent, var(--ngt-primary));
}

.bi-carousel-nav--kinetic .carousel-arrow:focus-visible {
  outline: 3px solid var(--ngt-primary);
  outline-offset: 3px;
}

/* Journey steps 3D lift */
.bi-3d-enabled .ngi-steps .ngi-step {
  transform-style: preserve-3d;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.bi-3d-enabled .ngi-steps .ngi-step:hover {
  transform: translateY(-6px) translateZ(12px);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.1);
}

.screen-reader-text {
  border: 0;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
  word-wrap: normal !important;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .bi-tilt-3d__inner,
  .bi-stack-3d__card,
  .carousel-3d__stage,
  .bi-carousel-3d__glow {
    animation: none !important;
    transition: none !important;
  }

  .bi-stack-3d {
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: none;
    perspective: none;
  }

  .bi-stack-3d__card {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    transform: none !important;
    opacity: 1 !important;
  }

  .ngi-pricing--3d {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .bi-stack-3d {
    min-height: auto;
    flex-direction: column;
    gap: 14px;
    perspective: none;
    max-width: none;
  }

  .bi-stack-3d__card {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    transform: none !important;
  }

  .ngi-section--tutors-3d .carousel-3d {
    height: 480px;
  }
}