webapp/frontend/src/components/ui/slider.tsx

import * as SliderPrimitive from "@radix-ui/react-slider";
import * as React from "react";

import { cn } from "@/lib/utils";

/**
 * Shadcn-style horizontal slider built on `@radix-ui/react-slider`.
 *
 * Single-thumb only by current design (the design-form uses one
 * thumb per scalar field). Multi-thumb is supported by the primitive
 * if a future feature needs it.
 */
export const Slider = React.forwardRef<
  React.ElementRef<typeof SliderPrimitive.Root>,
  React.ComponentPropsWithoutRef<typeof SliderPrimitive.Root>
>(({ className, ...props }, ref) => (
  <SliderPrimitive.Root
    ref={ref}
    className={cn(
      "relative flex w-full touch-none select-none items-center",
      className,
    )}
    {...props}
  >
    <SliderPrimitive.Track className="relative h-1.5 w-full grow overflow-hidden rounded-full bg-[var(--color-muted)]">
      <SliderPrimitive.Range className="absolute h-full bg-[var(--color-primary)]" />
    </SliderPrimitive.Track>
    <SliderPrimitive.Thumb className="block h-4 w-4 rounded-full border border-[var(--color-primary)] bg-[var(--color-background)] shadow transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--color-ring)] focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50" />
  </SliderPrimitive.Root>
));
Slider.displayName = "Slider";