/* ==========================================================================
   Live Class Showcase — Premium 3D (GPU transforms)
   ========================================================================== */

.showcase--premium {
  --showcase-gap: var(--space-5);
  --showcase-gap-tight: var(--space-3);
  position: relative;
  overflow: hidden;
}

.showcase__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.showcase__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
}

.showcase__orb--emerald {
  width: min(420px, 55vw);
  height: min(420px, 55vw);
  top: -8%;
  right: -5%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.35) 0%, transparent 70%);
}

.showcase__orb--gold {
  width: min(320px, 45vw);
  height: min(320px, 45vw);
  bottom: 5%;
  left: -8%;
  background: radial-gradient(circle, rgba(251, 191, 36, 0.22) 0%, transparent 70%);
}

.showcase__grid-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cpath fill='none' stroke='%23059669' stroke-width='0.5' d='M40 0v80M0 40h80'/%3E%3C/svg%3E");
  background-size: 80px 80px;
}

.showcase__container {
  position: relative;
  z-index: 1;
}

.showcase__grid {
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
}

@media (min-width: 1024px) {
  .showcase__grid {
    grid-template-columns: 1fr 1.05fr;
    gap: clamp(3rem, 6vw, 5rem);
  }
}

/* Content column */
.showcase__content {
  display: flex;
  flex-direction: column;
  gap: var(--showcase-gap);
}

.showcase__header {
  display: flex;
  flex-direction: column;
  gap: var(--showcase-gap-tight);
  margin: 0;
}

.showcase__badge {
  align-self: flex-start;
  margin: 0;
}

.showcase__title {
  margin: 0;
  font-size: var(--text-section, clamp(1.625rem, 4vw, 2.625rem));
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  line-height: 1.2;
  color: var(--color-text);
}

.showcase__desc {
  margin: 0;
  font-size: var(--text-body-lg, 1.125rem);
  line-height: 1.75;
  color: var(--color-text-secondary);
  max-width: 36rem;
}

/* Platform pills — 3D lift on hover */
.showcase__platforms {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: 0;
}

.showcase__platform {
  --pill-lift: 0;
  --pill-tilt-x: 0;
  --pill-tilt-y: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary-dark);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(5, 150, 105, 0.18);
  border-radius: var(--radius-full);
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 4px 12px rgba(5, 150, 105, 0.08);
  transform: perspective(600px)
    rotateX(calc(var(--pill-tilt-y) * -1deg))
    rotateY(calc(var(--pill-tilt-x) * 1deg))
    translate3d(0, calc(var(--pill-lift) * -1px), 0);
  transition:
    transform 0.15s cubic-bezier(0.23, 1, 0.32, 1),
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
  cursor: default;
}

.showcase__platform svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

.showcase__platform.is-pill-hover,
.showcase__platform:hover {
  --pill-lift: 4;
  border-color: rgba(5, 150, 105, 0.35);
  box-shadow:
    0 8px 20px rgba(5, 150, 105, 0.15),
    0 0 0 1px rgba(16, 185, 129, 0.1);
  background: #fff;
}

/* Feature list — interactive 3D rows */
.showcase__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.showcase__list-item {
  --item-lift: 0;
  --item-tilt-x: 0;
  --item-tilt-y: 0;
  --item-glow: 0;
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  transform: perspective(800px)
    rotateX(calc(var(--item-tilt-y) * -0.5deg))
    rotateY(calc(var(--item-tilt-x) * 0.5deg))
    translate3d(calc(var(--item-tilt-x) * 0.5px), calc(var(--item-lift) * -1px), 0);
  transition:
    transform 0.14s cubic-bezier(0.23, 1, 0.32, 1),
    box-shadow 0.18s ease,
    border-color 0.18s ease,
    background 0.18s ease;
  position: relative;
  overflow: hidden;
}

.showcase__list-item::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: var(--item-glow);
  background: linear-gradient(
    105deg,
    rgba(16, 185, 129, 0.08) 0%,
    transparent 45%,
    rgba(251, 191, 36, 0.06) 100%
  );
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.showcase__list-item.is-item-hover,
.showcase__list-item:hover {
  --item-lift: 6;
  --item-glow: 1;
  border-color: rgba(5, 150, 105, 0.28);
  background: #fff;
  box-shadow:
    0 12px 32px rgba(5, 150, 105, 0.12),
    0 0 0 1px rgba(16, 185, 129, 0.06);
}

.showcase__list-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--gradient-primary-soft);
  color: var(--color-primary-dark);
  transform: translateZ(12px);
  transition:
    transform 0.18s cubic-bezier(0.23, 1, 0.32, 1),
    background 0.18s ease,
    color 0.18s ease,
    box-shadow 0.18s ease;
}

.showcase__list-icon svg {
  width: 22px;
  height: 22px;
}

.showcase__list-item.is-item-hover .showcase__list-icon,
.showcase__list-item:hover .showcase__list-icon {
  transform: translateZ(20px) scale(1.06) rotate(-3deg);
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(5, 150, 105, 0.3);
}

.showcase__list-text {
  position: relative;
  z-index: 1;
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.6;
  color: var(--color-text-secondary);
  padding-top: 2px;
  transition: color 0.15s ease;
}

.showcase__list-item.is-item-hover .showcase__list-text,
.showcase__list-item:hover .showcase__list-text {
  color: var(--color-text);
}

/* CTA — 3D press */
.showcase__actions {
  margin: 0;
  padding-top: var(--space-2);
}

.showcase__cta {
  position: relative;
  overflow: hidden;
  transform: perspective(600px) translateZ(0);
  box-shadow:
    0 4px 14px rgba(5, 150, 105, 0.35),
    0 1px 0 rgba(255, 255, 255, 0.2) inset;
  transition:
    transform 0.15s cubic-bezier(0.23, 1, 0.32, 1),
    box-shadow 0.18s ease;
}

.showcase__cta-shine {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(255, 255, 255, 0.35) 50%,
    transparent 60%
  );
  transform: translateX(-120%);
  transition: transform 0.5s ease;
  pointer-events: none;
}

.showcase__cta:hover {
  transform: perspective(600px) translateY(-3px) scale(1.02);
  box-shadow:
    0 12px 28px rgba(5, 150, 105, 0.4),
    0 1px 0 rgba(255, 255, 255, 0.25) inset;
}

.showcase__cta:hover .showcase__cta-shine {
  transform: translateX(120%);
}

.showcase__cta:active {
  transform: perspective(600px) translateY(1px) scale(0.98);
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
}

/* Visual / mock card — main 3D tilt target */
.showcase__visual {
  position: relative;
}

.showcase__stage {
  --tilt-x: 0;
  --tilt-y: 0;
  --lift: 0;
  --shine-x: 50%;
  --shine-y: 50%;
  --glow: 0;
  position: relative;
  perspective: 1400px;
  transform-style: preserve-3d;
  transform: perspective(1200px)
    rotateX(calc(var(--tilt-y) * -1deg))
    rotateY(calc(var(--tilt-x) * 1deg))
    translate3d(0, calc(var(--lift) * 1px), 0);
  transition: transform 0.12s cubic-bezier(0.23, 1, 0.32, 1);
  will-change: transform;
}

.showcase__stage.is-hovered {
  --lift: -12;
  --glow: 1;
}

.showcase__mock {
  position: relative;
  border-radius: var(--radius-2xl);
  padding: 2px;
  background: linear-gradient(
    135deg,
    rgba(5, 150, 105, 0.5),
    rgba(251, 191, 36, 0.35),
    rgba(5, 150, 105, 0.4)
  );
  box-shadow:
    0 4px 6px rgba(15, 23, 42, 0.04),
    0 24px 56px rgba(15, 23, 42, 0.14),
    0 0 48px rgba(5, 150, 105, calc(var(--glow) * 0.15));
  transform-style: preserve-3d;
  transition: box-shadow 0.2s ease;
}

.showcase__stage.is-hovered .showcase__mock {
  box-shadow:
    0 8px 16px rgba(15, 23, 42, 0.06),
    0 32px 64px rgba(5, 150, 105, 0.22),
    0 0 64px rgba(16, 185, 129, 0.2);
}

.showcase__mock-border {
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: conic-gradient(
    from 0deg,
    rgba(16, 185, 129, calc(var(--glow) * 0.8)),
    rgba(251, 191, 36, calc(var(--glow) * 0.6)),
    rgba(16, 185, 129, calc(var(--glow) * 0.8))
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  opacity: var(--glow);
  pointer-events: none;
  z-index: 3;
  animation: showcaseBorderSpin 8s linear infinite;
}

@keyframes showcaseBorderSpin {
  to { transform: rotate(360deg); }
}

.showcase__mock-shine {
  position: absolute;
  inset: 2px;
  border-radius: calc(var(--radius-2xl) - 2px);
  pointer-events: none;
  z-index: 4;
  opacity: calc(var(--glow) * 0.9);
  background: radial-gradient(
    400px circle at var(--shine-x) var(--shine-y),
    rgba(255, 255, 255, 0.2) 0%,
    rgba(16, 185, 129, 0.08) 30%,
    transparent 60%
  );
  transition: opacity 0.15s ease;
}

.showcase__mock-glow {
  position: absolute;
  inset: 20%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.25) 0%, transparent 70%);
  filter: blur(40px);
  opacity: calc(0.4 + var(--glow) * 0.4);
  pointer-events: none;
  z-index: 0;
}

.showcase__mock-inner {
  position: relative;
  z-index: 2;
  border-radius: calc(var(--radius-2xl) - 2px);
  overflow: hidden;
  background: linear-gradient(165deg, #0f172a 0%, #1e293b 45%, #0f172a 100%);
  transform: translateZ(24px);
}

.showcase__mock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(15, 23, 42, 0.6);
}

.showcase__mock-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: #f8fafc;
}

.showcase__mock-live {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fff;
  background: rgba(239, 68, 68, 0.92);
  border-radius: var(--radius-full);
  box-shadow: 0 0 16px rgba(239, 68, 68, 0.45);
}

.showcase__mock-live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #fff;
  animation: showcaseLivePulse 1.4s ease-in-out infinite;
}

@keyframes showcaseLivePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.showcase__mock-video {
  position: relative;
  aspect-ratio: 16 / 9;
  min-height: 140px;
  display: flex;
  align-items: flex-end;
  padding: var(--space-5);
}

.showcase__mock-video-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 30%, rgba(15, 23, 42, 0.9) 100%),
    linear-gradient(135deg, rgba(5, 150, 105, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse 80% 60% at 50% 20%, rgba(16, 185, 129, 0.2) 0%, transparent 60%);
  animation: showcaseVideoShimmer 6s ease-in-out infinite alternate;
}

@keyframes showcaseVideoShimmer {
  0% { opacity: 0.85; }
  100% { opacity: 1; }
}

.showcase__mock-teacher {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.showcase__mock-teacher-avatar {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--emerald-500, #10b981);
  background: linear-gradient(135deg, #065f46, #10b981);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.showcase__mock-teacher-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.showcase__mock-teacher-name {
  display: block;
  font-size: var(--text-sm);
  font-weight: 700;
  color: #f8fafc;
}

.showcase__mock-teacher-lesson {
  display: block;
  font-size: var(--text-xs);
  color: #94a3b8;
}

.showcase__mock-students {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: var(--space-4) var(--space-5);
  background: rgba(15, 23, 42, 0.5);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.showcase__mock-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    hsl(calc(150 + var(--av-i, 0) * 12), 45%, 42%),
    hsl(calc(160 + var(--av-i, 0) * 10), 50%, 32%)
  );
  border: 2px solid rgba(30, 41, 59, 0.9);
  opacity: calc(0.55 + (var(--av-i, 0) % 5) * 0.1);
  transform: translateZ(calc(4px + (var(--av-i, 0) % 3) * 2px));
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.showcase__stage.is-hovered .showcase__mock-avatar {
  opacity: calc(0.7 + (var(--av-i, 0) % 5) * 0.08);
}

.showcase__mock-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: rgba(15, 23, 42, 0.85);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.showcase__mock-count {
  margin: 0;
  font-size: var(--text-sm);
  color: #94a3b8;
}

.showcase__mock-count strong {
  color: #f8fafc;
  font-size: var(--text-lg);
}

.showcase__mock-join {
  flex-shrink: 0;
  transform: translateZ(16px);
  transition:
    transform 0.15s cubic-bezier(0.23, 1, 0.32, 1),
    box-shadow 0.15s ease;
}

.showcase__stage.is-hovered .showcase__mock-join {
  transform: translateZ(24px) scale(1.04);
  box-shadow: 0 8px 24px rgba(5, 150, 105, 0.45);
}

/* Floating badges */
.showcase__float {
  position: absolute;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(226, 232, 240, 0.95);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
  transform: translateZ(40px);
  animation: showcaseFloat 5s ease-in-out infinite;
  pointer-events: none;
}

.showcase__float--zoom {
  top: -6%;
  right: -2%;
  animation-delay: 0s;
}

.showcase__float--safe {
  bottom: 8%;
  left: -4%;
  animation-delay: -2.5s;
}

@keyframes showcaseFloat {
  0%, 100% { transform: translate3d(0, 0, 40px); }
  50% { transform: translate3d(0, -8px, 48px); }
}

.showcase__float-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary-soft);
  font-size: 10px;
  font-weight: 800;
  color: var(--color-primary-dark);
}

.showcase__float-icon--shield svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
}

/* Scroll reveal */
.showcase__content,
.showcase__stage {
  opacity: 0;
  transform: translate3d(0, 32px, 0);
  transition:
    opacity 0.65s cubic-bezier(0.23, 1, 0.32, 1),
    transform 0.65s cubic-bezier(0.23, 1, 0.32, 1);
}

.showcase__stage {
  transform: translate3d(0, 32px, 0);
}

.showcase--premium.is-revealed .showcase__content {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.showcase--premium.is-revealed .showcase__stage {
  opacity: 1;
  transform: perspective(1200px)
    rotateX(calc(var(--tilt-y) * -1deg))
    rotateY(calc(var(--tilt-x) * 1deg))
    translate3d(0, calc(var(--lift) * 1px), 0);
  transition-delay: 120ms;
}

@media (prefers-reduced-motion: reduce) {
  .showcase__mock-border,
  .showcase__mock-live-dot,
  .showcase__mock-video-bg,
  .showcase__float {
    animation: none !important;
  }

  .showcase__content,
  .showcase__stage,
  .showcase--premium.is-revealed .showcase__stage {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .showcase__stage.is-hovered,
  .showcase__list-item:hover,
  .showcase__platform:hover {
    transform: none;
  }
}

@media (max-width: 1023px) {
  .showcase__float {
    display: none;
  }

  .showcase__stage.is-hovered {
    --lift: -6;
  }

}