diff --git a/app/(main)/layout.tsx b/app/(main)/layout.tsx
index 1e6cd5e..55e50ff 100644
--- a/app/(main)/layout.tsx
+++ b/app/(main)/layout.tsx
@@ -1,5 +1,5 @@
 import { Header } from "@/features/layout/components/header";
-import { Sidebar } from "@/features/layout/components/sidebar";
+import { MobileBottomNav, Sidebar } from "@/features/layout/components/sidebar";
 import { createClient } from "@/utils/supabase/server";
 
 export default async function MainLayout({
@@ -17,8 +17,9 @@ export default async function MainLayout({
       <Header user={user} />
       <div className="flex flex-1 pt-16">
         <Sidebar />
-        <main className="flex-1 w-full">{children}</main>
+        <main className="min-w-0 flex-1 pb-20 md:pb-0">{children}</main>
       </div>
+      <MobileBottomNav />
     </div>
   );
 }
diff --git a/features/layout/components/sidebar.tsx b/features/layout/components/sidebar.tsx
index a03be10..19136da 100644
--- a/features/layout/components/sidebar.tsx
+++ b/features/layout/components/sidebar.tsx
@@ -9,43 +9,54 @@ import { MenuItem } from "../types";
 const MENU_ITEMS: MenuItem[] = [
   {
     title: "대시보드",
-    href: "/",
+    href: "/dashboard",
     icon: Home,
     variant: "default",
     matchExact: true,
+    showInBottomNav: true,
   },
   {
     title: "자동매매",
     href: "/trade",
     icon: BarChart2,
     variant: "ghost",
+    badge: "LIVE",
+    showInBottomNav: true,
   },
   {
     title: "자산현황",
     href: "/assets",
     icon: Wallet,
     variant: "ghost",
+    showInBottomNav: true,
   },
   {
     title: "프로필",
     href: "/profile",
     icon: User,
     variant: "ghost",
+    showInBottomNav: false,
   },
   {
     title: "설정",
     href: "/settings",
     icon: Settings,
     variant: "ghost",
+    showInBottomNav: true,
   },
 ];
 
+/**
+ * @description 메인 좌측 사이드바(데스크탑): 기본 축소 상태에서 hover/focus 시 확장됩니다.
+ * @see features/layout/components/sidebar.tsx MENU_ITEMS 한 곳에서 메뉴/배지/모바일 탭 구성을 함께 관리합니다.
+ */
 export function Sidebar() {
   const pathname = usePathname();
 
   return (
-    <aside className="hidden h-[calc(100vh-4rem)] shrink-0 overflow-y-auto border-r border-zinc-200 bg-white py-6 pl-2 pr-6 dark:border-zinc-800 dark:bg-black md:sticky md:top-16 md:block md:w-64 lg:w-72">
-      <div className="flex flex-col space-y-1">
+    <aside className="group/sidebar hidden h-[calc(100vh-4rem)] shrink-0 overflow-y-auto border-r border-zinc-200 bg-white px-2 py-5 transition-[width] duration-200 dark:border-zinc-800 dark:bg-black md:sticky md:top-16 md:block md:w-[74px] md:hover:w-64 md:focus-within:w-64">
+      {/* ========== SIDEBAR ITEMS ========== */}
+      <div className="flex flex-col space-y-1.5">
         {MENU_ITEMS.map((item) => {
           const isActive = item.matchExact
             ? pathname === item.href
@@ -55,22 +66,46 @@ export function Sidebar() {
             <Link
               key={item.href}
               href={item.href}
+              title={item.title}
               className={cn(
-                "group flex items-center rounded-md px-3 py-2 text-sm font-medium hover:bg-zinc-100 hover:text-zinc-900 dark:hover:bg-zinc-800 dark:hover:text-zinc-50 transition-colors",
+                "group/item relative flex items-center rounded-xl px-3 py-2.5 text-sm transition-colors",
+                "hover:bg-zinc-100 hover:text-zinc-900 dark:hover:bg-zinc-800 dark:hover:text-zinc-50",
                 isActive
-                  ? "bg-zinc-100 text-zinc-900 dark:bg-zinc-800 dark:text-zinc-50"
+                  ? "bg-zinc-100 text-zinc-900 shadow-sm dark:bg-zinc-800 dark:text-zinc-50"
                   : "text-zinc-500 dark:text-zinc-400",
               )}
             >
-              <item.icon
+              {/* ========== ACTIVE BAR ========== */}
+              <span
                 className={cn(
-                  "mr-3 h-5 w-5 shrink-0 transition-colors",
-                  isActive
-                    ? "text-zinc-900 dark:text-zinc-50"
-                    : "text-zinc-400 group-hover:text-zinc-900 dark:text-zinc-500 dark:group-hover:text-zinc-50",
+                  "absolute left-0 top-1/2 h-5 -translate-y-1/2 rounded-r-full transition-all",
+                  isActive ? "w-1.5 bg-brand-500" : "w-0",
                 )}
               />
-              {item.title}
+
+              {/* ========== ICON + DOT BADGE ========== */}
+              <item.icon
+                className={cn(
+                  "h-5 w-5 shrink-0 transition-colors",
+                  isActive
+                    ? "text-zinc-900 dark:text-zinc-50"
+                    : "text-zinc-400 group-hover/item:text-zinc-900 dark:text-zinc-500 dark:group-hover/item:text-zinc-50",
+                )}
+              />
+
+              {item.badge && (
+                <span className="absolute left-7 top-2 h-2 w-2 rounded-full bg-brand-500 md:group-hover/sidebar:hidden md:group-focus-within/sidebar:hidden" />
+              )}
+
+              {/* ========== LABEL (EXPAND ON HOVER/FOCUS) ========== */}
+              <span className="ml-3 flex min-w-0 items-center gap-1.5 overflow-hidden whitespace-nowrap transition-all duration-200 md:max-w-0 md:opacity-0 md:group-hover/sidebar:max-w-[180px] md:group-hover/sidebar:opacity-100 md:group-focus-within/sidebar:max-w-[180px] md:group-focus-within/sidebar:opacity-100">
+                <span className="truncate font-medium">{item.title}</span>
+                {item.badge && (
+                  <span className="shrink-0 rounded-full bg-brand-100 px-1.5 py-0.5 text-[10px] font-semibold text-brand-700">
+                    {item.badge}
+                  </span>
+                )}
+              </span>
             </Link>
           );
         })}
@@ -78,3 +113,49 @@ export function Sidebar() {
     </aside>
   );
 }
+
+/**
+ * @description 모바일 하단 빠른 탭 네비게이션.
+ * @see features/layout/components/sidebar.tsx Sidebar와 같은 MENU_ITEMS를 공유해 중복 정의를 줄입니다.
+ */
+export function MobileBottomNav() {
+  const pathname = usePathname();
+  const bottomItems = MENU_ITEMS.filter((item) => item.showInBottomNav !== false);
+
+  return (
+    <nav
+      aria-label="모바일 빠른 메뉴"
+      className="fixed inset-x-0 bottom-0 z-40 border-t border-zinc-200 bg-white/95 backdrop-blur-sm supports-backdrop-filter:bg-white/80 dark:border-zinc-800 dark:bg-black/95 dark:supports-backdrop-filter:bg-black/80 md:hidden"
+    >
+      {/* ========== BOTTOM NAV ITEMS ========== */}
+      <div className={cn("grid", bottomItems.length === 4 ? "grid-cols-4" : "grid-cols-5")}>
+        {bottomItems.map((item) => {
+          const isActive = item.matchExact
+            ? pathname === item.href
+            : pathname.startsWith(item.href);
+
+          return (
+            <Link
+              key={`bottom-${item.href}`}
+              href={item.href}
+              className={cn(
+                "flex min-h-16 flex-col items-center justify-center gap-1.5 text-[11px] font-medium transition-colors",
+                isActive
+                  ? "text-brand-700"
+                  : "text-zinc-500 hover:text-zinc-900 dark:text-zinc-400 dark:hover:text-zinc-50",
+              )}
+            >
+              <span className="relative">
+                <item.icon className={cn("h-4 w-4", isActive && "text-brand-600")} />
+                {item.badge && (
+                  <span className="absolute -right-1 -top-1 h-2 w-2 rounded-full bg-brand-500" />
+                )}
+              </span>
+              <span className="leading-none">{item.title}</span>
+            </Link>
+          );
+        })}
+      </div>
+    </nav>
+  );
+}
diff --git a/features/layout/types/index.ts b/features/layout/types/index.ts
index 03e2b3e..7c78344 100644
--- a/features/layout/types/index.ts
+++ b/features/layout/types/index.ts
@@ -6,4 +6,6 @@ export interface MenuItem {
   icon: LucideIcon;
   variant: "default" | "ghost";
   matchExact?: boolean;
+  badge?: string;
+  showInBottomNav?: boolean;
 }