.rf-process,
.rf-lab {
  --rf-surface: #ffffff;
  --rf-surface-soft: #f4f7f5;
  --rf-ink: #243029;
  --rf-muted: #617068;
  --rf-line: #cdd8d1;
  --rf-a: #2f9e44;
  --rf-a-soft: #dff3e4;
  --rf-b: #d97706;
  --rf-b-soft: #fbe8cc;
  --rf-boundary: #59636d;
  --rf-query: #7048e8;
  box-sizing: border-box;
  width: 100%;
  color: var(--rf-ink);
  background: var(--rf-surface);
  border: 1px solid var(--rf-line);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(31, 48, 39, 0.08);
}

[theme="dark"] .rf-process,
[theme="dark"] .rf-lab {
  --rf-surface: #202523;
  --rf-surface-soft: #29302c;
  --rf-ink: #edf3ef;
  --rf-muted: #aab8b0;
  --rf-line: #3d4942;
  --rf-a: #69db7c;
  --rf-a-soft: #1f4930;
  --rf-b: #ffa94d;
  --rf-b-soft: #50381d;
  --rf-boundary: #d6dde0;
  --rf-query: #b197fc;
  box-shadow: none;
}

.rf-process *,
.rf-lab * {
  box-sizing: border-box;
}

.rf-process {
  margin: 0;
  padding: 1rem;
}

.rf-process__head,
.rf-lab__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.rf-process h3,
.rf-lab h3 {
  margin: 0.1rem 0 0;
  color: var(--rf-ink);
  font-size: 1.05rem;
  line-height: 1.35;
}

.rf-eyebrow {
  margin: 0;
  color: var(--rf-muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.11em;
}

.rf-button {
  flex: 0 0 auto;
  padding: 0.55rem 0.8rem;
  color: #fff;
  background: #2b8a3e;
  border: 0;
  border-radius: 8px;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.rf-button:hover {
  background: #237234;
}

.rf-button:focus-visible,
.rf-lab input:focus-visible,
.rf-lab select:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--rf-query) 55%, transparent);
  outline-offset: 2px;
}

.rf-process svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.rf-scroll-hint {
  display: none;
  margin: 0 0 0.4rem;
  color: var(--rf-muted);
  font-size: 0.72rem;
}

.rf-process .rf-panel,
.rf-process .rf-sample {
  fill: var(--rf-surface-soft);
  stroke: var(--rf-line);
  stroke-width: 2;
}

.rf-process .class-a,
.rf-process .leaf-a {
  fill: var(--rf-a);
}

.rf-process .class-b,
.rf-process .leaf-b {
  fill: var(--rf-b);
}

.rf-process .rf-label,
.rf-process .rf-result {
  fill: var(--rf-ink);
  font-size: 15px;
  font-weight: 700;
  text-anchor: middle;
}

.rf-process .rf-vote {
  font-size: 26px;
  font-weight: 800;
  text-anchor: middle;
}

.rf-process .class-a-text {
  fill: var(--rf-a);
}

.rf-process .class-b-text {
  fill: var(--rf-b);
}

.rf-process .rf-divider {
  stroke: var(--rf-line);
  stroke-width: 2;
}

.rf-process .rf-arrow {
  fill: none;
  stroke: var(--rf-muted);
  stroke-width: 3;
  marker-end: url(#rf-arrow);
  stroke-dasharray: 140;
  stroke-dashoffset: 140;
  opacity: 0.18;
  transition: stroke-dashoffset 0.55s ease, opacity 0.3s ease;
}

.rf-process marker path {
  fill: var(--rf-muted);
}

.rf-process .rf-tree path,
.rf-process .rf-tree circle {
  fill: var(--rf-surface);
  stroke: var(--rf-muted);
  stroke-width: 3;
}

.rf-process .rf-stage {
  opacity: 0.16;
  transform: translateY(6px);
  transform-origin: center;
  transition: opacity 0.42s ease, transform 0.42s ease;
}

.rf-process .rf-stage--data,
.rf-process[data-step="1"] .rf-stage--samples,
.rf-process[data-step="2"] .rf-stage--samples,
.rf-process[data-step="2"] .rf-stage--trees,
.rf-process[data-step="3"] .rf-stage--samples,
.rf-process[data-step="3"] .rf-stage--trees,
.rf-process[data-step="3"] .rf-stage--vote {
  opacity: 1;
  transform: none;
}

.rf-process[data-step="1"] .rf-arrow--1,
.rf-process[data-step="2"] .rf-arrow--1,
.rf-process[data-step="2"] .rf-arrow--2,
.rf-process[data-step="3"] .rf-arrow {
  stroke-dashoffset: 0;
  opacity: 1;
}

.rf-process[data-step="1"] .rf-stage--samples,
.rf-process[data-step="2"] .rf-stage--trees,
.rf-process[data-step="3"] .rf-stage--vote {
  animation: rf-arrive 0.48s ease both;
}

.rf-process figcaption,
.rf-caption,
.rf-hint {
  margin: 0.8rem 0 0;
  color: var(--rf-muted);
  font-size: 0.78rem;
  line-height: 1.5;
  text-align: center;
}

.rf-lab {
  padding: 1rem;
}

.rf-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(190px, 1fr);
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

.rf-control {
  display: grid;
  gap: 0.35rem;
  color: var(--rf-ink);
  font-size: 0.78rem;
  font-weight: 650;
}

.rf-control span {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
}

.rf-control output {
  color: var(--rf-a);
  font-variant-numeric: tabular-nums;
}

.rf-control input,
.rf-control select {
  width: 100%;
}

.rf-control input {
  accent-color: var(--rf-a);
}

.rf-control select {
  min-height: 2.2rem;
  padding: 0.35rem 0.45rem;
  color: var(--rf-ink);
  background: var(--rf-surface-soft);
  border: 1px solid var(--rf-line);
  border-radius: 7px;
  font: inherit;
  font-weight: 500;
}

.rf-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.rf-metrics div {
  min-width: 0;
  padding: 0.55rem 0.65rem;
  background: var(--rf-surface-soft);
  border-radius: 8px;
}

.rf-metrics span,
.rf-metrics strong {
  display: block;
}

.rf-metrics span {
  margin-bottom: 0.2rem;
  color: var(--rf-muted);
  font-size: 0.66rem;
}

.rf-metrics strong {
  overflow: hidden;
  color: var(--rf-ink);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rf-canvas-wrap {
  overflow: hidden;
  background: var(--rf-surface-soft);
  border: 1px solid var(--rf-line);
  border-radius: 10px;
}

.rf-lab canvas {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  cursor: crosshair;
  touch-action: manipulation;
}

.rf-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 0.6rem;
  color: var(--rf-muted);
  font-size: 0.72rem;
}

.rf-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
}

.rf-legend i {
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
}

.rf-legend .class-a {
  background: var(--rf-a);
}

.rf-legend .class-b {
  background: var(--rf-b);
}

.rf-legend .query {
  background: transparent;
  border: 2px solid var(--rf-query);
}

.rf-legend .boundary {
  width: 1rem;
  height: 0;
  border-radius: 0;
  border-top: 2px solid var(--rf-boundary);
}

@keyframes rf-arrive {
  from { transform: translateY(9px) scale(0.97); }
  to { transform: none; }
}

@media (max-width: 640px) {
  .rf-process__head,
  .rf-lab__head {
    align-items: flex-start;
    flex-direction: column;
  }

  .rf-controls,
  .rf-metrics {
    grid-template-columns: 1fr;
  }

  .rf-process {
    padding: 0.75rem;
  }

  .rf-process svg {
    margin: 0 -0.35rem;
    min-width: 560px;
    width: calc(100% + 0.7rem);
  }

  .rf-process {
    overflow-x: auto;
  }

  .rf-scroll-hint {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rf-process *,
  .rf-lab * {
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
}