.prismfield-perimeter,
.prismfield-perimeter-fallback {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.prismfield-perimeter-fallback {
  z-index: 88;
  background: url("../assets/apps/prismfield/rgb-edge-clouds.png") center / cover no-repeat;
  mix-blend-mode: screen;
  opacity: 0.28;
  transition: opacity 900ms ease;
}

.prismfield-perimeter {
  z-index: 89;
  display: block;
  opacity: 0;
  transition: opacity 1100ms ease;
}

.prismfield-release-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 0;
  color: rgba(226, 229, 239, 0.62);
  font: 500 0.68rem/1.5 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.prismfield-release-status span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 13px rgba(var(--accent-rgb), 0.72);
}

.river-close .prismfield-release-status {
  justify-content: center;
}

.prismfield-canvas-active .prismfield-perimeter {
  opacity: 1;
}

.prismfield-canvas-active .prismfield-perimeter-fallback {
  opacity: 0;
}

@media (prefers-reduced-motion: reduce) {
  .prismfield-perimeter,
  .prismfield-perimeter-fallback {
    transition: none;
  }

  .prismfield-canvas-active .prismfield-perimeter {
    opacity: 0.9;
  }
}

@media (max-width: 720px) {
  .prismfield-perimeter-fallback {
    z-index: 2;
    background:
      radial-gradient(70% 42% at -8% 12%, rgba(255, 28, 58, 0.66), transparent 72%),
      radial-gradient(76% 44% at 108% 28%, rgba(40, 186, 255, 0.6), transparent 74%),
      radial-gradient(74% 42% at 30% 106%, rgba(142, 52, 255, 0.58), transparent 76%),
      radial-gradient(64% 38% at 86% 98%, rgba(255, 44, 139, 0.5), transparent 74%);
    mix-blend-mode: screen;
    opacity: 0.42;
  }

  .prismfield-perimeter {
    z-index: 3;
  }

  .prismfield-canvas-active .prismfield-perimeter {
    opacity: 0.86;
  }

  .river-header-actions a[href="privacy/"] {
    display: none;
  }

  .river-copy h1 {
    font-size: clamp(3.35rem, 15.6vw, 3.8rem);
    line-height: 0.86;
  }

  .river-subtitle {
    font-size: 1.22rem;
  }

  .river-lede {
    font-size: 0.86rem;
    line-height: 1.62;
  }

  .prismfield-release-status {
    margin-top: 18px;
    font-size: 0.61rem;
    letter-spacing: 0.07em;
  }

  .river-hero .river-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px 18px;
  }

  .river-hero .river-action {
    font-size: 0.65rem;
    white-space: nowrap;
  }

  .river-hero-art {
    justify-self: center;
    width: min(100%, 310px);
    height: 260px;
  }

  .river-statement,
  .river-close {
    padding-right: 22px;
    padding-left: 22px;
  }

  .river-statement h2 {
    font-size: 2.9rem;
  }

  .river-facts h3 {
    font-size: 1.48rem;
  }

  .river-close h2 {
    font-size: 3.15rem;
  }
}

@media (max-width: 360px) {
  .river-brand span {
    display: none;
  }

  .river-header-actions {
    gap: 12px;
  }

  .river-copy h1 {
    font-size: 3.15rem;
  }

  .river-hero .river-actions {
    grid-template-columns: 1fr;
    justify-items: start;
  }
}