.diffusion-hero {
  max-width: 60rem;
  margin: 0 auto 2rem;
  padding: 2rem 1rem 0;
  text-align: center;
}

.diffusion-hero__nav {
  display: flex;
  justify-content: flex-start;
  margin-bottom: 1rem;
}

.diffusion-hero__back {
  font-size: 0.95rem;
}

.diffusion-hero__lead {
  font-size: 1.1rem;
  line-height: 1.6;
}

.diffusion-stage {
  position: relative;
  margin: 0 auto 2rem;
  max-width: 1024px;
}

.diffusion-stage canvas {
  width: 100%;
  height: auto;
  display: block;
  background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.05), transparent 60%);
  border-radius: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.diffusion-overlay {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  background: rgba(0, 0, 0, 0.45);
  padding: 1rem;
  border-radius: 0.75rem;
  box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(6px);
  color: #f5f5f5;
}

.diffusion-button {
  appearance: none;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, #51d0ff, #6c5ce7);
  color: #0b0b14;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.4rem 1.25rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.diffusion-button:hover,
.diffusion-button:focus {
  transform: translateY(-1px);
  box-shadow: 0 0.6rem 1.5rem rgba(82, 208, 255, 0.4);
}

.diffusion-button:focus {
  outline: 2px solid rgba(255, 255, 255, 0.6);
  outline-offset: 3px;
}

.diffusion-button--secondary {
  background: rgba(245, 245, 245, 0.2);
  color: #f5f5f5;
}

.diffusion-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 0.75rem 1.25rem;
  margin: 0;
  font-size: 0.85rem;
}

.diffusion-stats dt {
  font-weight: 600;
  opacity: 0.75;
}

.diffusion-stats dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.diffusion-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  background: rgba(6, 10, 20, 0.88);
  border-radius: 0.75rem;
  color: #f5f5f5;
}

.diffusion-footer {
  text-align: center;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 4rem;
}

@media (max-width: 720px) {
  .diffusion-overlay {
    position: static;
    align-items: stretch;
    background: rgba(0, 0, 0, 0.65);
    margin-top: 1rem;
  }

  .diffusion-stage {
    padding: 0 1rem;
  }
}