.pkv {
  position: relative;
  width: 100%;
  min-height: 320px;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  isolation: isolate;
  border-radius: 28px;
  transform: translateZ(0);
}

.pkv::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.13), transparent 38%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.14), transparent 38%, rgba(255, 255, 255, 0.06));
  mix-blend-mode: screen;
}

.pkv::after {
  content: "";
  position: absolute;
  inset: 1px;
  z-index: 2;
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16);
}

.pkv--chebyshev::after {
  border-color: rgba(72, 142, 145, 0.18);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.pkv--foliation::after {
  border-color: rgba(130, 174, 184, 0.18);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.52),
    inset 0 -18px 42px rgba(180, 214, 222, 0.08);
}

.pkv-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
}

.pkv-fallback {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.pkv-fallback span {
  position: absolute;
  width: calc(42% + var(--i) * 3%);
  aspect-ratio: 1;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  transform: rotate(calc(var(--i) * 18deg)) scaleX(calc(1.1 + var(--i) * 0.02));
  filter: blur(calc(var(--i) * 0.12px));
}

.pkv-fallback--hamjepa span {
  border-color: color-mix(in srgb, #63e6ff 45%, #f05dff 55%);
  box-shadow: 0 0 36px rgba(120, 222, 255, 0.18);
}

.pkv-fallback--chebyshev span {
  width: calc(28% + var(--i) * 5%);
  border-radius: 45% 55% 52% 48%;
  border-color: color-mix(in srgb, #72dce2 62%, #dca65c 38%);
  box-shadow: 0 0 32px rgba(92, 197, 200, 0.14);
}

.pkv-fallback--foliation span {
  width: calc(30% + var(--i) * 3.4%);
  border-radius: 50%;
  border-color: color-mix(in srgb, #aeeff2 58%, #c8baff 42%);
  box-shadow:
    0 0 24px rgba(139, 224, 230, 0.16),
    inset 0 0 16px rgba(255, 255, 255, 0.2);
  transform:
    rotate(calc(var(--i) * 13deg))
    rotateX(64deg)
    scaleX(calc(1.35 + var(--i) * 0.025));
}

@media (prefers-reduced-motion: reduce) {
  .pkv {
    scroll-margin-top: 2rem;
  }
}

@media (max-width: 720px) {
  .pkv {
    min-height: 240px;
    aspect-ratio: 4 / 3;
    border-radius: 20px;
  }
}