.mb-upload-error {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-align: center;
}

.mb-workspace { margin-top: 4px; display: flex; flex-direction: column; gap: 18px; }

.mb-stage-wrap { display: flex; flex-direction: column; align-items: center; gap: 10px; }

.mb-canvas-outer {
  position: relative;
  max-width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background:
    repeating-conic-gradient(var(--bg-alt) 0% 25%, var(--surface) 0% 50%) 0 0 / 22px 22px;
}
#mbCanvas { display: block; max-width: 100%; touch-action: none; cursor: none; }

.mb-brush-cursor {
  position: absolute;
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.4);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.mb-summary { font-size: 13px; font-weight: 600; color: var(--text-secondary); }

.mb-settings { flex-direction: column; align-items: stretch; gap: 16px; }
.mb-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.mb-row input[type="range"] { flex: 1; min-width: 140px; accent-color: var(--accent); }
.mb-type-group { display: flex; align-items: center; gap: 8px; }

.mb-actions-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

@media (max-width: 640px) {
  .mb-row, .mb-actions-row { justify-content: center; }
}