:root {
  --display-feedback: #ff5fa6;
  --recurrent-feedback: #ff8b4a;
  --hdr-feedback: #2ea8ff;
}

.loop-notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.loop-notes p {
  margin: 0;
  padding: 0;
  color: var(--text);
  font-size: 1.44rem;
  line-height: 1.35;
}

.swatch {
  display: inline-block;
  width: 0.72rem;
  height: 0.72rem;
  margin-right: 8px;
  border-radius: 50%;
}

.swatch.display-feedback {
  background: var(--display-feedback);
}

.swatch.recurrent-feedback {
  background: var(--recurrent-feedback);
}

.swatch.hdr-feedback {
  background: var(--hdr-feedback);
}

.sampling-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 0.52fr);
  gap: 46px;
  align-items: stretch;
}

.sampling-grid .figure-panel {
  display: grid;
  align-items: center;
}

.sampling-grid .plot-figure {
  display: block;
}

.gradient-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.gradient-item {
  overflow: hidden;
  border-radius: 8px;
  background: var(--panel);
}

.gradient-strip img {
  width: 100%;
  background: #111;
}

.gradient-label {
  margin: 0;
  padding: 9px 10px 11px;
  color: var(--text);
  font-family: "Linux Biolinum", Arial, sans-serif;
  font-size: 0.92rem;
  line-height: 1.1;
  text-align: center;
}

.gradient-comparison > figcaption {
  margin-top: 14px;
}

.paper-callout {
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 1.44rem;
  font-style: italic;
  line-height: 1.35;
}

.robustness-card {
  gap: 28px;
}

@media (max-width: 980px) {
  .loop-notes,
  .sampling-grid {
    grid-template-columns: 1fr;
  }

  .sampling-grid {
    gap: 28px;
  }
}

@media (max-width: 739px) {
  .loop-notes {
    gap: 10px;
  }

  .gradient-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .gradient-label {
    padding: 8px 4px 9px;
    font-size: 0.82rem;
  }
}