.flow-tool-wrapper {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.flow-main-split {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

@media (min-width: 1280px) {
  .flow-main-split {
    flex-direction: row;
    align-items: flex-start;
  }

  .flow-main-split > .flow-canvas-shell {
    flex: 1 1 60%;
    min-width: 0;
  }

  .flow-main-split > .flow-region-panel {
    flex: 1 1 40%;
    max-width: 420px;
    min-width: 320px;
    position: sticky;
    top: 24px;
    align-self: flex-start;
  }
}

.flow-status-message {
  margin: 0 0 16px;
  font-size: 0.85rem;
  color: #2563eb;
}

.flow-status-message[data-tone="error"] {
  color: #dc2626;
}

.flow-global-controls,
.flow-canvas-shell,
.flow-region-panel,
.flow-extra {
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 6px 20px -8px rgba(15, 23, 42, 0.22);
  padding: 20px;
}

.flow-global-controls {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.flow-global-row {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  align-items: end;
}

.flow-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.flow-slider input[type="range"] {
  width: 100%;
  accent-color: #2563eb;
}

.flow-file-input {
  padding: 0.6rem 0;
  border: none;
  border-bottom: 1px solid #d1d5db;
  background: transparent;
  font-size: 0.9rem;
  color: #1f2937;
}

.flow-file-input:focus {
  outline: none;
  border-bottom-color: #2563eb;
  box-shadow: 0 1px 0 0 #2563eb;
}

.flow-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.flow-actions .mui-btn {
  text-transform: none;
}

.flow-actions .mui-btn--raised {
  background-color: #2563eb;
  color: #ffffff;
}

.flow-canvas-shell {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.flow-canvas-panel {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid #d1d5db;
}

.flow-canvas-panel canvas {
  display: block;
  width: 100%;
  height: auto;
  cursor: crosshair;
  background: #111827;
}

.flow-direction-overlay {
  font-size: 0.85rem;
  font-weight: 600;
  color: #2563eb;
}

.flow-tool-shortcuts {
  font-size: 0.85rem;
  color: #374151;
  margin: 0;
}

.flow-region-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
  height: fit-content;
}

.flow-region-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.flow-region-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: #111827;
}

.flow-region-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.flow-region-list {
  display: grid;
  gap: 14px;
}

.flow-region-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-radius: 14px;
  background: #f9fafb;
  padding: 14px 16px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  --region-accent: #2563eb;
  --region-accent-soft: rgba(37, 99, 235, 0.12);
  --region-accent-shadow: rgba(37, 99, 235, 0.25);
  box-shadow: 0 12px 28px -18px rgba(15, 23, 42, 0.18);
  transition: border 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  min-width: 0;
}

.flow-region-card:hover {
  border-color: var(--region-accent);
  background: var(--region-accent-soft);
}

.flow-region-card.flow-region-active {
  border-color: var(--region-accent);
  background: var(--region-accent-soft);
  box-shadow: 0 16px 32px -18px var(--region-accent-shadow);
}

.flow-region-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.flow-region-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.flow-region-chip {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: var(--region-accent);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(17, 24, 39, 0.15);
  flex-shrink: 0;
}

.flow-region-select {
  background: none;
  border: none;
  padding: 0;
  font-size: 1rem;
  font-weight: 600;
  color: #111827;
  text-align: left;
  cursor: pointer;
  flex: 1;
}

.flow-region-select:focus {
  outline: none;
  color: #1d4ed8;
}

.flow-region-card.flow-region-active .flow-region-select {
  color: var(--region-accent);
}

.flow-region-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.flow-region-card .mui-btn--flat {
  color: var(--region-accent);
}

.flow-region-card-body {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.flow-region-card input[type="range"] {
  accent-color: var(--region-accent);
}

.flow-direction-control {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.flow-direction-control canvas {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 1px solid #d1d5db;
  background: #ffffff;
}

.flow-direction-readout {
  font-size: 0.8rem;
  color: var(--region-accent);
  font-weight: 600;
  text-align: left;
}

.flow-region-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
}

.flow-switch label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: #374151;
  cursor: pointer;
}

.flow-switch input {
  accent-color: #2563eb;
}

.flow-extra summary {
  cursor: pointer;
  font-weight: 600;
  color: #111827;
  outline: none;
}

.flow-extra summary::marker {
  color: #2563eb;
}

.flow-extra-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-top: 14px;
}

.flow-progress-text {
  display: block;
  min-height: 1rem;
  font-size: 0.8rem;
  color: #2563eb;
}

.flow-region-active {
  border-color: #2563eb;
  background: #eff6ff;
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.25);
}

.flow-region-active .flow-region-select {
  color: #1d4ed8;
}

.flow-region-active .flow-direction-control canvas {
  border-color: #2563eb;
}

@media (min-width: 1200px) {
  .flow-global-row {
    grid-template-columns: repeat(4, minmax(180px, 1fr));
  }

  .flow-region-grid {
    grid-template-columns: 1fr;
  }
}