diff --git a/docs/devnotes.md b/docs/devnotes.md
index 31f8cb9..cf6e9a0 100644
--- a/docs/devnotes.md
+++ b/docs/devnotes.md
@@ -10,10 +10,6 @@ You can debug on the Safari on iOS only if you have mac (and run macOS). The cer
 - For visual bugs: on you iDevice, redirect the localhost.direct to your dev computer. Now you have the hot reload on you iDevice.
   - You can use network debugging apps like "Shadowrocket" to do such thing.
 
-## Hero Animation won't work (after hot reload)
-
-That's a known issue. Hot reload won't refresh the module sets the hero cache. Refresh the whole page and it should work.
-
 ## The components don't react to the change as I setting the store, until the page reloaded
 
 The `WritableAtom<unknwon>.set` might do an equals check. You must set a different object to ensure the atom sending a notify.
@@ -47,3 +43,9 @@ Ja, the code is weird, but that's the best we know. Anyway, you need new object
 Idk why, but transition on logical directions may not work on WebKit - sometimes they work.
 
 Use physical directions to avoid trouble, like "margin-top, margin-bottom".
+
+## Safe area insets
+
+For isolating control of the UI effect, we already setup css variables `--safe-area-inset-*`. In components, you should use the variables unless you have reasons to use `env()`.
+
+Using `--safe-area-inset-*`, you can control the global value in settings (under dev mode).
diff --git a/src/material/BottomSheet.tsx b/src/material/BottomSheet.tsx
index c7e0671..a5d5d90 100644
--- a/src/material/BottomSheet.tsx
+++ b/src/material/BottomSheet.tsx
@@ -9,12 +9,10 @@ import {
   type ResolvedChildren,
 } from "solid-js";
 import "./BottomSheet.css";
-import { useHeroSignal } from "../platform/anim";
 import material from "./material.module.css";
 import {
   ANIM_CURVE_ACELERATION,
   ANIM_CURVE_DECELERATION,
-  ANIM_CURVE_STD,
 } from "./theme";
 import {
   animateSlideInFromRight,
@@ -28,32 +26,11 @@ export type BottomSheetProps = {
   onClose?(reason: "backdrop"): void;
 };
 
-export const HERO = Symbol("BottomSheet Hero Symbol");
-
-function composeAnimationFrame(
-  {
-    top,
-    left,
-    height,
-    width,
-  }: Record<"top" | "left" | "height" | "width", number>,
-  x: Record<string, unknown>,
-) {
-  return {
-    top: `${top}px`,
-    left: `${left}px`,
-    height: `${height}px`,
-    width: `${width}px`,
-    ...x,
-  };
-}
-
 const MOVE_SPEED = 1600;
 
 const BottomSheet: ParentComponent<BottomSheetProps> = (props) => {
   let element: HTMLDialogElement;
   let animation: Animation | undefined;
-  const [hero, setHero] = useHeroSignal(HERO);
   const [cache, setCache] = createSignal<ResolvedChildren | undefined>();
   const ochildren = children(() => props.children);
 
@@ -74,24 +51,11 @@ const BottomSheet: ParentComponent<BottomSheetProps> = (props) => {
   });
 
   const onClose = () => {
-    const srcElement = hero();
-    if (srcElement) {
-      srcElement.style.visibility = "unset";
-    }
-
     element.close();
-    setHero();
   };
 
   const animatedClose = () => {
-    const srcElement = hero();
-    const endRect = srcElement?.getBoundingClientRect();
-    if (endRect) {
-      const startRect = element.getBoundingClientRect();
-      const animation = animateHero(startRect, endRect, element, true);
-      animation.addEventListener("finish", onClose);
-      animation.addEventListener("cancel", onClose);
-    } else {
+
       if (window.innerWidth > 560 && !props.bottomUp) {
         onClose();
         return;
@@ -106,21 +70,12 @@ const BottomSheet: ParentComponent<BottomSheetProps> = (props) => {
         : animateSlideOutToRight(element, { easing: ANIM_CURVE_ACELERATION });
       animation.addEventListener("finish", onAnimationEnd);
       animation.addEventListener("cancel", onAnimationEnd);
-    }
+
   };
 
   const animatedOpen = () => {
     element.showModal();
-    const srcElement = hero();
-    const startRect = srcElement?.getBoundingClientRect();
-    if (!startRect) {
-      console.debug("no source element");
-    }
-    if (startRect) {
-      srcElement!.style.visibility = "hidden";
-      const endRect = element.getBoundingClientRect();
-      animateHero(startRect, endRect, element);
-    } else if (props.bottomUp) {
+    if (props.bottomUp) {
       animateSlideInFromBottom(element);
     } else if (window.innerWidth <= 560) {
       element.classList.add("animated");
@@ -165,41 +120,6 @@ const BottomSheet: ParentComponent<BottomSheetProps> = (props) => {
     return animation;
   };
 
-  const animateHero = (
-    startRect: DOMRect,
-    endRect: DOMRect,
-    element: HTMLElement,
-    reserve?: boolean,
-  ) => {
-    const easing = ANIM_CURVE_STD;
-    element.classList.add("animated");
-    // distance_lt = (|top_start - top_end|^2 + |left_end - left_end|^2)^(-2)
-    const distancelt = Math.sqrt(
-      Math.pow(Math.abs(startRect.top - endRect.top), 2) +
-        Math.pow(Math.abs(startRect.left - endRect.left), 2),
-    );
-    const distancerb = Math.sqrt(
-      Math.pow(Math.abs(startRect.bottom - endRect.bottom), 2) +
-        Math.pow(Math.abs(startRect.right - endRect.right), 2),
-    );
-    const distance = distancelt + distancerb;
-    const duration = distance / 1.6;
-    animation = element.animate(
-      [
-        composeAnimationFrame(startRect, { transform: "none" }),
-        composeAnimationFrame(endRect, { transform: "none" }),
-      ],
-      { easing, duration },
-    );
-    const onAnimationEnd = () => {
-      element.classList.remove("animated");
-      animation = undefined;
-    };
-    animation.addEventListener("finish", onAnimationEnd);
-    animation.addEventListener("cancel", onAnimationEnd);
-    return animation;
-  };
-
   onCleanup(() => {
     if (animation) {
       animation.cancel();
diff --git a/src/material/Scaffold.css b/src/material/Scaffold.css
index 56b2cd0..b4a7c74 100644
--- a/src/material/Scaffold.css
+++ b/src/material/Scaffold.css
@@ -32,7 +32,6 @@
   left: 0;
   right: 0;
   z-index: var(--tutu-zidx-nav, auto);
-  padding-bottom: var(--safe-area-inset-bottom, 0);
 }
 
 .Scaffold {
diff --git a/src/platform/anim.ts b/src/platform/anim.ts
index dfffc87..f606872 100644
--- a/src/platform/anim.ts
+++ b/src/platform/anim.ts
@@ -1,58 +1,3 @@
-import {
-  createContext,
-  createRenderEffect,
-  createSignal,
-  untrack,
-  useContext,
-  type Accessor,
-  type Signal,
-} from "solid-js";
-
-export type HeroSource = {
-  [key: string | symbol | number]: HTMLElement | undefined;
-};
-
-const HeroSourceContext = createContext<Signal<HeroSource>>(
-  /* __@PURE__ */ undefined,
-);
-
-export const HeroSourceProvider = HeroSourceContext.Provider;
-
-export function useHeroSource() {
-  return useContext(HeroSourceContext);
-}
-
-/**
- * Use hero value for the {@link key}.
- *
- * Note: the setter here won't set the value of the hero source.
- * To set hero source, use {@link useHeroSource} and set the corresponding key.
- */
-export function useHeroSignal(
-  key: string | symbol | number,
-): Signal<HTMLElement | undefined> {
-  const source = useHeroSource();
-  if (source) {
-    const [get, set] = createSignal<HTMLElement>();
-
-    createRenderEffect(() => {
-      const value = source[0]();
-      if (value[key]) {
-        set(value[key]);
-        source[1]((x) => {
-          const cpy = Object.assign({}, x);
-          delete cpy[key];
-          return cpy;
-        });
-      }
-    });
-
-    return [get, set];
-  } else {
-    console.debug("no hero source");
-    return [() => undefined, () => undefined];
-  }
-}
 
 export function animateRollOutFromTop(
   root: HTMLElement,
diff --git a/src/timelines/TootComposer.tsx b/src/timelines/TootComposer.tsx
index 50d5e0e..5693332 100644
--- a/src/timelines/TootComposer.tsx
+++ b/src/timelines/TootComposer.tsx
@@ -98,7 +98,7 @@ const TootVisibilityPickerDialog: Component<{
             style={{
               "border-top": "1px solid #ddd",
               background: "var(--tutu-color-surface)",
-              padding: "8px 16px",
+              padding: "8px 16px calc(8px + var(--safe-area-inset-bottom, 0px))",
               width: "100%",
               "text-align": "end",
             }}
diff --git a/src/timelines/TootList.tsx b/src/timelines/TootList.tsx
index 38670e2..41e01f7 100644
--- a/src/timelines/TootList.tsx
+++ b/src/timelines/TootList.tsx
@@ -10,8 +10,6 @@ import {
 import { type mastodon } from "masto";
 import { vibrate } from "../platform/hardware";
 import { useDefaultSession } from "../masto/clients";
-import { useHeroSource } from "../platform/anim";
-import { HERO as BOTTOM_SHEET_HERO } from "../material/BottomSheet";
 import { setCache as setTootBottomSheetCache } from "./TootBottomSheet";
 import RegularToot, {
   findElementActionable,
@@ -53,7 +51,6 @@ const TootList: Component<{
   onChangeToot: (id: string, value: mastodon.v1.Status) => void;
 }> = (props) => {
   const session = useDefaultSession();
-  const heroSrc = useHeroSource();
   const [expandedThreadId, setExpandedThreadId] = createSignal<string>();
   const { push } = useNavigator();
 
@@ -124,9 +121,6 @@ const TootList: Component<{
       console.warn("no account info?");
       return;
     }
-    if (heroSrc) {
-      heroSrc[1]((x) => ({ ...x, [BOTTOM_SHEET_HERO]: srcElement }));
-    }
 
     const acct = `${inf.username}@${p.site}`;
     setTootBottomSheetCache(acct, toot);