diff --git a/AGENTS.md b/AGENTS.md
index 54ddb12..f27d5ac 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -44,6 +44,7 @@ Before building a new component, check this list. If it exists, import it. If it
 | `shared-layout-bg` | `components/motion/shared-layout-bg.tsx` | Pill that glides between hovered items via shared layout |
 | `dock` | `components/motion/dock.tsx` | macOS-style dock with grouped actions and gliding active pill |
 | `tooltip` | `components/motion/tooltip.tsx` | Hover/focus tooltip with blur enter/exit and spring spawn |
+| `popover` | `components/motion/popover.tsx` | Composable gooey popover (`Popover`, `PopoverTrigger`, `PopoverContent`); panel oozes out of the trigger via an SVG goo filter (liquid neck that stretches/pinches) with crisp content fading in on top. Inline-anchored, click or hover trigger, controlled/uncontrolled |
 | `morphing-modal` | `components/motion/morphing-modal.tsx` | Panel that morphs height across inner views with blur cross-fade |
 | `text-reveal` | `components/motion/text-reveal.tsx` | Word or character reveal with spring slide-up and blur |
 | `text-shimmer` | `components/motion/text-shimmer.tsx` | Gradient sweep across text for loading or emphasis |
diff --git a/components/motion/popover.tsx b/components/motion/popover.tsx
new file mode 100644
index 0000000..574d3c3
--- /dev/null
+++ b/components/motion/popover.tsx
@@ -0,0 +1,515 @@
+"use client";
+
+import {
+  animate,
+  useMotionValue,
+  useMotionValueEvent,
+  useReducedMotion,
+  type MotionValue,
+} from "motion/react";
+import {
+  cloneElement,
+  createContext,
+  isValidElement,
+  type ReactElement,
+  type ReactNode,
+  type Ref,
+  useCallback,
+  useContext,
+  useEffect,
+  useId,
+  useLayoutEffect,
+  useMemo,
+  useRef,
+  useState,
+} from "react";
+import { cn } from "@/lib/utils";
+
+type Side = "top" | "bottom";
+type Align = "start" | "center" | "end";
+type TriggerMode = "click" | "hover";
+
+const GOO_SPRING = { type: "spring", visualDuration: 0.32, bounce: 0.28 } as const;
+const HOVER_CLOSE_DELAY = 120;
+
+const lerp = (a: number, b: number, t: number) => a + (b - a) * t;
+
+interface Rect {
+  x: number;
+  y: number;
+  w: number;
+  h: number;
+  r: number;
+}
+interface Geo {
+  layerW: number;
+  layerH: number;
+  left: number;
+  top: number;
+  trigger: Rect;
+  panel: Rect;
+}
+
+// Trigger rect and panel rect in a shared local coordinate box.
+function buildGeo(
+  tW: number,
+  tH: number,
+  cW: number,
+  cH: number,
+  side: Side,
+  align: Align,
+  gap: number,
+  panelRadius: number,
+): Geo {
+  const py = side === "bottom" ? tH + gap : -(gap + cH);
+  const px = align === "start" ? 0 : align === "end" ? tW - cW : (tW - cW) / 2;
+
+  const left = Math.min(0, px);
+  const top = Math.min(0, py);
+  const layerW = Math.max(tW, px + cW) - left;
+  const layerH = Math.max(tH, py + cH) - top;
+
+  const triggerRadius = Math.min(tH / 2, panelRadius);
+
+  return {
+    layerW,
+    layerH,
+    left,
+    top,
+    trigger: { x: -left, y: -top, w: tW, h: tH, r: triggerRadius },
+    panel: { x: px - left, y: py - top, w: cW, h: cH, r: panelRadius },
+  };
+}
+
+function insetFor(rect: Rect, layerW: number, layerH: number): string {
+  const top = rect.y;
+  const right = layerW - (rect.x + rect.w);
+  const bottom = layerH - (rect.y + rect.h);
+  const left = rect.x;
+  return `inset(${top}px ${right}px ${bottom}px ${left}px round ${rect.r}px)`;
+}
+
+function insetForProgress(geo: Geo, p: number): string {
+  const t = geo.trigger;
+  const pn = geo.panel;
+  const rect: Rect = {
+    x: lerp(t.x, pn.x, p),
+    y: lerp(t.y, pn.y, p),
+    w: lerp(t.w, pn.w, p),
+    h: lerp(t.h, pn.h, p),
+    r: lerp(t.r, pn.r, p),
+  };
+  return insetFor(rect, geo.layerW, geo.layerH);
+}
+
+interface PopoverContextValue {
+  open: boolean;
+  setOpen: (open: boolean) => void;
+  toggle: () => void;
+  openHover: () => void;
+  scheduleClose: () => void;
+  triggerMode: TriggerMode;
+  side: Side;
+  align: Align;
+  gap: number;
+  panelRadius: number;
+  gooStrength: number;
+  reduce: boolean;
+  gooId: string;
+  contentId: string;
+  progress: MotionValue<number>;
+  triggerRef: React.MutableRefObject<HTMLElement | null>;
+}
+
+const PopoverContext = createContext<PopoverContextValue | null>(null);
+
+function usePopoverContext(component: string) {
+  const ctx = useContext(PopoverContext);
+  if (!ctx) throw new Error(`${component} must be used within <Popover>`);
+  return ctx;
+}
+
+export interface PopoverProps {
+  children: ReactNode;
+  /** Controlled open state. */
+  open?: boolean;
+  /** Uncontrolled initial open state. */
+  defaultOpen?: boolean;
+  onOpenChange?: (open: boolean) => void;
+  /** How the popover is summoned. Default "click". */
+  trigger?: TriggerMode;
+  /** Which side of the trigger the panel oozes out of. Default "bottom". */
+  side?: Side;
+  /** Alignment along the trigger's edge. Default "center". */
+  align?: Align;
+  /** Gap between trigger and panel, in px — the length of the gooey neck. Default 14. */
+  sideOffset?: number;
+  /** Corner radius of the open panel, in px. Default 16. */
+  panelRadius?: number;
+  /** Blur radius feeding the goo filter — higher melts more. Default 8. */
+  gooStrength?: number;
+  className?: string;
+}
+
+export function Popover({
+  children,
+  open: controlledOpen,
+  defaultOpen = false,
+  onOpenChange,
+  trigger = "click",
+  side = "bottom",
+  align = "center",
+  sideOffset = 14,
+  panelRadius = 16,
+  gooStrength = 8,
+  className,
+}: PopoverProps) {
+  const reduce = useReducedMotion() ?? false;
+  const gooId = useId().replace(/:/g, "");
+  const contentId = useId();
+  const rootRef = useRef<HTMLDivElement>(null);
+  const triggerRef = useRef<HTMLElement | null>(null);
+  const closeTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const progress = useMotionValue(defaultOpen ? 1 : 0);
+
+  const [internalOpen, setInternalOpen] = useState(defaultOpen);
+  const controlled = controlledOpen !== undefined;
+  const open = controlled ? controlledOpen : internalOpen;
+
+  const setOpen = useCallback(
+    (next: boolean) => {
+      if (!controlled) setInternalOpen(next);
+      onOpenChange?.(next);
+    },
+    [controlled, onOpenChange],
+  );
+
+  const cancelClose = useCallback(() => {
+    if (closeTimer.current) {
+      clearTimeout(closeTimer.current);
+      closeTimer.current = null;
+    }
+  }, []);
+
+  const openHover = useCallback(() => {
+    cancelClose();
+    setOpen(true);
+  }, [cancelClose, setOpen]);
+
+  const scheduleClose = useCallback(() => {
+    cancelClose();
+    closeTimer.current = setTimeout(() => setOpen(false), HOVER_CLOSE_DELAY);
+  }, [cancelClose, setOpen]);
+
+  const toggle = useCallback(() => setOpen(!open), [setOpen, open]);
+
+  useEffect(() => () => cancelClose(), [cancelClose]);
+
+  useEffect(() => {
+    const animation = animate(
+      progress,
+      open ? 1 : 0,
+      reduce ? { duration: 0 } : GOO_SPRING,
+    );
+    return () => animation.stop();
+  }, [open, progress, reduce]);
+
+  useEffect(() => {
+    if (!open) return;
+    const onKey = (e: KeyboardEvent) => e.key === "Escape" && setOpen(false);
+    // Trigger and panel share rootRef, so moving between them isn't "outside".
+    const onPointer = (e: PointerEvent) => {
+      if (rootRef.current && !rootRef.current.contains(e.target as Node))
+        setOpen(false);
+    };
+    window.addEventListener("keydown", onKey);
+    if (trigger === "click") window.addEventListener("pointerdown", onPointer);
+    return () => {
+      window.removeEventListener("keydown", onKey);
+      window.removeEventListener("pointerdown", onPointer);
+    };
+  }, [open, setOpen, trigger]);
+
+  const ctx = useMemo<PopoverContextValue>(
+    () => ({
+      open,
+      setOpen,
+      toggle,
+      openHover,
+      scheduleClose,
+      triggerMode: trigger,
+      side,
+      align,
+      gap: sideOffset,
+      panelRadius,
+      gooStrength,
+      reduce,
+      gooId,
+      contentId,
+      progress,
+      triggerRef,
+    }),
+    [
+      open,
+      setOpen,
+      toggle,
+      openHover,
+      scheduleClose,
+      trigger,
+      side,
+      align,
+      sideOffset,
+      panelRadius,
+      gooStrength,
+      reduce,
+      gooId,
+      contentId,
+      progress,
+    ],
+  );
+
+  const hoverHandlers =
+    trigger === "hover"
+      ? { onMouseEnter: openHover, onMouseLeave: scheduleClose }
+      : {};
+
+  return (
+    <PopoverContext.Provider value={ctx}>
+      <div
+        ref={rootRef}
+        className={cn("relative inline-flex isolate", className)}
+        {...hoverHandlers}
+      >
+        {children}
+      </div>
+    </PopoverContext.Provider>
+  );
+}
+
+function mergeRefs<T>(...refs: Array<Ref<T> | undefined>) {
+  return (node: T | null) => {
+    for (const ref of refs) {
+      if (typeof ref === "function") ref(node);
+      else if (ref && typeof ref === "object")
+        (ref as React.MutableRefObject<T | null>).current = node;
+    }
+  };
+}
+
+export interface PopoverTriggerProps {
+  /** A single focusable element (e.g. a Button) that opens the popover. */
+  children: ReactElement;
+}
+
+export function PopoverTrigger({ children }: PopoverTriggerProps) {
+  const ctx = usePopoverContext("PopoverTrigger");
+
+  if (!isValidElement(children)) return children;
+
+  const child = children as ReactElement<Record<string, unknown>>;
+  const childProps = child.props;
+  const childRef = (childProps as { ref?: Ref<HTMLElement> }).ref;
+
+  const compose =
+    (name: string, handler: () => void) =>
+    (event: { defaultPrevented?: boolean }) => {
+      (childProps[name] as ((e: unknown) => void) | undefined)?.(event);
+      if (!event.defaultPrevented) handler();
+    };
+
+  const handlers: Record<string, unknown> =
+    ctx.triggerMode === "hover"
+      ? {
+          onFocus: compose("onFocus", ctx.openHover),
+          onBlur: compose("onBlur", ctx.scheduleClose),
+        }
+      : { onClick: compose("onClick", ctx.toggle) };
+
+  return cloneElement(child, {
+    ...handlers,
+    ref: mergeRefs(childRef, (node: HTMLElement | null) => {
+      ctx.triggerRef.current = node;
+    }),
+    // Above the goo layer (z-[-1]) so the neck reads behind it.
+    className: cn("relative z-0", childProps.className as string | undefined),
+    "aria-haspopup": "dialog",
+    "aria-expanded": ctx.open,
+    "aria-controls": ctx.open ? ctx.contentId : undefined,
+    "data-state": ctx.open ? "open" : "closed",
+  });
+}
+
+const ALIGN_ORIGIN: Record<Align, string> = {
+  start: "left",
+  center: "center",
+  end: "right",
+};
+
+export interface PopoverContentProps {
+  children: ReactNode;
+  className?: string;
+}
+
+export function PopoverContent({ children, className }: PopoverContentProps) {
+  const ctx = usePopoverContext("PopoverContent");
+  const {
+    side,
+    align,
+    gap,
+    panelRadius,
+    gooStrength,
+    reduce,
+    gooId,
+    contentId,
+    progress,
+    triggerRef,
+    open,
+    triggerMode,
+    openHover,
+    scheduleClose,
+  } = ctx;
+
+  const measureRef = useRef<HTMLDivElement>(null);
+  const blobRef = useRef<HTMLDivElement>(null);
+  const clipRef = useRef<HTMLDivElement>(null);
+  const geoRef = useRef<Geo | null>(null);
+
+  const [sizes, setSizes] = useState({ tW: 0, tH: 0, cW: 0, cH: 0 });
+
+  useLayoutEffect(() => {
+    const triggerNode = triggerRef.current;
+    const contentNode = measureRef.current;
+    if (!contentNode) return;
+
+    const measure = () => {
+      const tW = triggerNode?.offsetWidth ?? 0;
+      const tH = triggerNode?.offsetHeight ?? 0;
+      const cW = contentNode.offsetWidth;
+      const cH = contentNode.offsetHeight;
+      setSizes((prev) =>
+        prev.tW === tW && prev.tH === tH && prev.cW === cW && prev.cH === cH
+          ? prev
+          : { tW, tH, cW, cH },
+      );
+    };
+    measure();
+
+    const observer = new ResizeObserver(measure);
+    observer.observe(contentNode);
+    if (triggerNode) observer.observe(triggerNode);
+    return () => observer.disconnect();
+  }, [triggerRef]);
+
+  const geo = useMemo(
+    () => buildGeo(sizes.tW, sizes.tH, sizes.cW, sizes.cH, side, align, gap, panelRadius),
+    [sizes, side, align, gap, panelRadius],
+  );
+  geoRef.current = geo;
+
+  // Morph the same clip on the goo body and the content, so the whole popover
+  // oozes as one and the text reveals with it.
+  const render = useCallback((g: Geo | null, p: number) => {
+    if (!g || g.layerW === 0) return;
+    const clip = insetForProgress(g, p);
+    if (blobRef.current) blobRef.current.style.clipPath = clip;
+    if (clipRef.current) clipRef.current.style.clipPath = clip;
+  }, []);
+
+  useLayoutEffect(() => {
+    render(geo, progress.get());
+  }, [geo, progress, render]);
+
+  useMotionValueEvent(progress, "change", (p) => render(geoRef.current, p));
+
+  const hoverHandlers =
+    triggerMode === "hover"
+      ? { onMouseEnter: openHover, onMouseLeave: scheduleClose }
+      : {};
+
+  return (
+    <>
+      {/* Goo filter: blur, sharpen the alpha back into solid shapes, then lay
+          the crisp original on top so blobs merge with liquid edges. */}
+      <svg aria-hidden width="0" height="0" className="pointer-events-none absolute">
+        <title>Popover goo filter</title>
+        <defs>
+          <filter id={gooId} x="-50%" y="-50%" width="200%" height="200%">
+            <feGaussianBlur in="SourceGraphic" stdDeviation={gooStrength} result="blur" />
+            <feColorMatrix
+              in="blur"
+              mode="matrix"
+              values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 22 -10"
+              result="goo"
+            />
+            <feComposite in="SourceGraphic" in2="goo" operator="atop" />
+          </filter>
+        </defs>
+      </svg>
+
+      {/* Goo body: static trigger pill + morphing blob, behind the trigger. */}
+      <div
+        aria-hidden
+        className="pointer-events-none absolute z-[-1]"
+        style={{
+          left: geo.left,
+          top: geo.top,
+          width: geo.layerW,
+          height: geo.layerH,
+          filter: reduce ? undefined : `url(#${gooId})`,
+        }}
+      >
+        <div
+          className="absolute bg-popover"
+          style={{
+            left: geo.trigger.x,
+            top: geo.trigger.y,
+            width: geo.trigger.w,
+            height: geo.trigger.h,
+            borderRadius: geo.trigger.r,
+          }}
+        />
+        <div
+          ref={blobRef}
+          className="absolute inset-0 bg-popover"
+          style={{ clipPath: insetForProgress(geo, progress.get()) }}
+        />
+      </div>
+
+      {/* Content, clipped by the same morph. pointer-events-none so it never
+          shadows the trigger; the open panel re-enables its own. */}
+      <div
+        className="pointer-events-none absolute z-10"
+        style={{ left: geo.left, top: geo.top, width: geo.layerW, height: geo.layerH }}
+      >
+        <div
+          ref={clipRef}
+          inert={!open}
+          className="absolute inset-0"
+          style={{
+            clipPath: insetForProgress(geo, progress.get()),
+            pointerEvents: open ? "auto" : "none",
+          }}
+        >
+          <div
+            ref={measureRef}
+            id={contentId}
+            role="dialog"
+            {...hoverHandlers}
+            style={{
+              position: "absolute",
+              left: geo.panel.x,
+              top: geo.panel.y,
+              transformOrigin: `${ALIGN_ORIGIN[align]} ${side === "bottom" ? "top" : "bottom"}`,
+            }}
+            className={cn(
+              "w-max max-w-[min(92vw,20rem)] p-4 text-popover-foreground outline-none",
+              className,
+            )}
+          >
+            {children}
+          </div>
+        </div>
+      </div>
+    </>
+  );
+}
diff --git a/components/previews/index.tsx b/components/previews/index.tsx
index 6d12c81..4fa5e2c 100644
--- a/components/previews/index.tsx
+++ b/components/previews/index.tsx
@@ -151,6 +151,9 @@ export const previews: Record<string, ComponentType> = {
   "motion/tooltip": dynamic(() =>
     import("./motion/tooltip.preview").then((m) => m.TooltipPreview),
   ),
+  "motion/popover": dynamic(() =>
+    import("./motion/popover.preview").then((m) => m.PopoverPreview),
+  ),
   "motion/morphing-modal": dynamic(() =>
     import("./motion/morphing-modal.preview").then((m) => m.MorphingModalPreview),
   ),
diff --git a/components/previews/motion/popover.preview.tsx b/components/previews/motion/popover.preview.tsx
new file mode 100644
index 0000000..6cc2e58
--- /dev/null
+++ b/components/previews/motion/popover.preview.tsx
@@ -0,0 +1,53 @@
+"use client";
+
+import { Button } from "@/components/motion/button";
+import {
+  Popover,
+  PopoverContent,
+  PopoverTrigger,
+} from "@/components/motion/popover";
+
+export function PopoverPreview() {
+  return (
+    <div className="flex flex-wrap items-center justify-center gap-4">
+      <Popover side="bottom" align="start">
+        <PopoverTrigger>
+          <Button variant="secondary">Edit profile</Button>
+        </PopoverTrigger>
+        <PopoverContent className="w-72">
+          <p className="text-sm font-medium text-foreground">Dimensions</p>
+          <p className="mt-1 text-xs text-muted-foreground">
+            Set the width and height for the layer.
+          </p>
+          <div className="mt-3 flex flex-col gap-2">
+            <label className="flex items-center justify-between gap-3 text-sm">
+              <span className="text-muted-foreground">Width</span>
+              <input
+                defaultValue="100%"
+                className="h-8 w-32 rounded-lg border border-border bg-background px-2.5 text-sm text-foreground outline-none focus-visible:ring-2 focus-visible:ring-foreground/20"
+              />
+            </label>
+            <label className="flex items-center justify-between gap-3 text-sm">
+              <span className="text-muted-foreground">Height</span>
+              <input
+                defaultValue="auto"
+                className="h-8 w-32 rounded-lg border border-border bg-background px-2.5 text-sm text-foreground outline-none focus-visible:ring-2 focus-visible:ring-foreground/20"
+              />
+            </label>
+          </div>
+        </PopoverContent>
+      </Popover>
+
+      <Popover trigger="hover" side="top">
+        <PopoverTrigger>
+          <Button variant="outline">Hover me</Button>
+        </PopoverTrigger>
+        <PopoverContent className="w-56">
+          <p className="text-sm text-foreground">
+            Opens on hover, with a grace window so you can move into the panel.
+          </p>
+        </PopoverContent>
+      </Popover>
+    </div>
+  );
+}
diff --git a/lib/registry.ts b/lib/registry.ts
index 120ffd6..7d5e0d8 100644
--- a/lib/registry.ts
+++ b/lib/registry.ts
@@ -183,6 +183,22 @@ export const registry: CategoryEntry[] = [
         description: "Hover or focus tooltip with blur enter/exit and spring spawn.",
         file: "components/motion/tooltip.tsx",
       },
+      {
+        slug: "popover",
+        name: "Popover",
+        description:
+          "Gooey popover whose panel oozes out of the trigger through an SVG goo filter — a liquid neck that stretches and pinches — with crisp content fading in on top. Click or hover trigger, controlled or uncontrolled.",
+        file: "components/motion/popover.tsx",
+        badge: "new",
+        keywords: [
+          "react popover",
+          "gooey popover",
+          "animated popover",
+          "svg goo filter",
+          "metaball popover",
+          "hover popover react",
+        ],
+      },
       {
         slug: "morphing-modal",
         name: "Morphing Modal",