diff --git a/DevLog/Resource/Assets.xcassets/Apple.imageset/Contents.json b/DevLog/Resource/Assets.xcassets/Apple.imageset/Contents.json
index 80ffdaaa..17f02871 100644
--- a/DevLog/Resource/Assets.xcassets/Apple.imageset/Contents.json
+++ b/DevLog/Resource/Assets.xcassets/Apple.imageset/Contents.json
@@ -2,7 +2,7 @@
   "images" : [
     {
       "filename" : "Apple_black.png",
-      "idiom" : "iphone"
+      "idiom" : "universal"
     },
     {
       "appearances" : [
@@ -12,7 +12,7 @@
         }
       ],
       "filename" : "Apple_white.png",
-      "idiom" : "iphone"
+      "idiom" : "universal"
     }
   ],
   "info" : {
diff --git a/DevLog/Resource/Assets.xcassets/Github.imageset/Contents.json b/DevLog/Resource/Assets.xcassets/Github.imageset/Contents.json
index efbdb0d1..3f6384bd 100644
--- a/DevLog/Resource/Assets.xcassets/Github.imageset/Contents.json
+++ b/DevLog/Resource/Assets.xcassets/Github.imageset/Contents.json
@@ -2,7 +2,7 @@
   "images" : [
     {
       "filename" : "Github_black.png",
-      "idiom" : "iphone"
+      "idiom" : "universal"
     },
     {
       "appearances" : [
@@ -12,7 +12,7 @@
         }
       ],
       "filename" : "Github_white.png",
-      "idiom" : "iphone"
+      "idiom" : "universal"
     }
   ],
   "info" : {
diff --git a/DevLog/Resource/Assets.xcassets/Google.imageset/Contents.json b/DevLog/Resource/Assets.xcassets/Google.imageset/Contents.json
index f87048f4..89ac1240 100644
--- a/DevLog/Resource/Assets.xcassets/Google.imageset/Contents.json
+++ b/DevLog/Resource/Assets.xcassets/Google.imageset/Contents.json
@@ -2,7 +2,7 @@
   "images" : [
     {
       "filename" : "Google.png",
-      "idiom" : "iphone"
+      "idiom" : "universal"
     }
   ],
   "info" : {
diff --git a/DevLog/Resource/Assets.xcassets/Primary.imageset/Contents.json b/DevLog/Resource/Assets.xcassets/Primary.imageset/Contents.json
index d1e8f444..d35a699e 100644
--- a/DevLog/Resource/Assets.xcassets/Primary.imageset/Contents.json
+++ b/DevLog/Resource/Assets.xcassets/Primary.imageset/Contents.json
@@ -2,7 +2,7 @@
   "images" : [
     {
       "filename" : "Primary_dark.png",
-      "idiom" : "iphone"
+      "idiom" : "universal"
     }
   ],
   "info" : {
diff --git a/DevLog/UI/Common/Component/LoginButton.swift b/DevLog/UI/Common/Component/LoginButton.swift
index a0a6f2f3..1f925003 100644
--- a/DevLog/UI/Common/Component/LoginButton.swift
+++ b/DevLog/UI/Common/Component/LoginButton.swift
@@ -10,8 +10,8 @@ import SwiftUI
 struct LoginButton: View {
     @State private var logo: Image?
     @State private var text = ""
-    @State private var height = CGFloat.zero
-    let action: () -> Void
+    @ScaledMetric(relativeTo: .body) private var height = CGFloat(22)
+    private let action: () -> Void
 
     init(
         logo: Image? = nil,
@@ -27,31 +27,24 @@ struct LoginButton: View {
         Button(action: {
             action()
         }) {
-            HStack {
-                Text(text)
-                    .foregroundStyle(Color.primary)
-                    .font(.system(size: height / 3))
-                    .frame(maxWidth: .infinity, maxHeight: .infinity)
-            }
+            Text(text)
+                .foregroundStyle(Color.primary)
+                .font(.system(.body))
         }
-        .contentShape(RoundedRectangle(cornerRadius: height / 2))
-        .overlay(
-            GeometryReader { proxy in
-                ZStack(alignment: .leading) {
-                    RoundedRectangle(cornerRadius: height / 2)
-                        .stroke(Color.gray, lineWidth: 1)
-                        .onAppear {
-                            height = proxy.size.height
-                        }
-                    if let logo = logo {
-                        logo
-                            .resizable()
-                            .scaledToFit()
-                            .frame(width: height / 2, height: height / 2)
-                            .padding(.leading)
-                    }
+        .frame(width: 300, height: height + 16)
+        .contentShape(.capsule)
+        .overlay {
+            ZStack(alignment: .leading) {
+                Capsule()
+                    .stroke(Color.gray, lineWidth: 1)
+                if let logo = logo {
+                    logo
+                        .resizable()
+                        .scaledToFit()
+                        .frame(width: height, height: height)
+                        .padding(.leading)
                 }
             }
-        )
+        }
     }
 }
diff --git a/DevLog/UI/Common/Component/TodoItemRow.swift b/DevLog/UI/Common/Component/TodoItemRow.swift
index 7a878ca0..370025b5 100644
--- a/DevLog/UI/Common/Component/TodoItemRow.swift
+++ b/DevLog/UI/Common/Component/TodoItemRow.swift
@@ -8,7 +8,7 @@
 import SwiftUI
 
 struct TodoItemRow: View {
-    @Environment(\.sceneWidth) private var sceneWidth
+    @ScaledMetric(relativeTo: .largeTitle) private var labelWidth = CGFloat(34)
     private let item: TodoListItem
 
     init(_ item: TodoListItem) {
@@ -19,7 +19,7 @@ struct TodoItemRow: View {
         HStack {
             Image(systemName: "checkmark.circle")
                 .resizable()
-                .frame(width: sceneWidth * 0.08, height: sceneWidth * 0.08)
+                .frame(width: labelWidth, height: labelWidth)
                 .foregroundStyle(item.isCompleted ? .green : .secondary)
             VStack(alignment: .leading, spacing: 0) {
                 HStack {
diff --git a/DevLog/UI/Common/Component/WebItemRow.swift b/DevLog/UI/Common/Component/WebItemRow.swift
index d05d4523..e1119172 100644
--- a/DevLog/UI/Common/Component/WebItemRow.swift
+++ b/DevLog/UI/Common/Component/WebItemRow.swift
@@ -8,15 +8,14 @@
 import SwiftUI
 
 struct WebItemRow: View {
-    @Environment(\.sceneWidth) private var sceneWidth
-
+    @ScaledMetric(relativeTo: .largeTitle) private var labelWidth = CGFloat(34)
     let item: WebPageItem
     let showsChevron: Bool
 
     var body: some View {
         HStack {
             thumbnail
-                .frame(width: sceneWidth * 0.08, height: sceneWidth * 0.08)
+                .frame(width: labelWidth, height: labelWidth)
                 .clipShape(RoundedRectangle(cornerRadius: 10))
 
             VStack(alignment: .leading) {
diff --git a/DevLog/UI/Home/HomeView.swift b/DevLog/UI/Home/HomeView.swift
index 9a704266..64a6e655 100644
--- a/DevLog/UI/Home/HomeView.swift
+++ b/DevLog/UI/Home/HomeView.swift
@@ -9,9 +9,9 @@ import SwiftUI
 
 struct HomeView: View {
     @Environment(\.diContainer) var container: any DIContainer
-    @Environment(\.sceneWidth) var sceneWidth: CGFloat
     @State private var router = NavigationRouter()
     @State var viewModel: HomeViewModel
+    @ScaledMetric(relativeTo: .largeTitle) private var labelWidth = CGFloat(34)
 
     var body: some View {
         NavigationStack(path: $router.path) {
@@ -210,7 +210,7 @@ struct HomeView: View {
             } else {
                 ForEach(viewModel.state.recentTodos, id: \.id) { todo in
                     NavigationLink(value: Path.detail(todo.id)) {
-                        RecentTodoRow(todo: todo, sceneWidth: sceneWidth)
+                        RecentTodoRow(todo: todo)
                     }
                 }
             }
@@ -370,7 +370,7 @@ struct HomeView: View {
         HStack {
             RoundedRectangle(cornerRadius: 8)
                 .fill(imageColor)
-                .frame(width: sceneWidth * 0.08, height: sceneWidth * 0.08)
+                .frame(width: labelWidth, height: labelWidth)
                 .overlay {
                     Image(systemName: systemName)
                         .foregroundStyle(Color.white)
@@ -391,15 +391,15 @@ struct HomeView: View {
 }
 
 private struct RecentTodoRow: View {
+    @ScaledMetric(relativeTo: .largeTitle) private var labelWidth = CGFloat(34)
     let todo: RecentTodoItem
-    let sceneWidth: CGFloat
 
     var body: some View {
         let category = TodoCategoryItem(from: todo.category)
         HStack(alignment: .top, spacing: 12) {
             RoundedRectangle(cornerRadius: 8)
                 .fill(category.color)
-                .frame(width: sceneWidth * 0.08, height: sceneWidth * 0.08)
+                .frame(width: labelWidth, height: labelWidth)
                 .overlay {
                     Image(systemName: category.symbolName)
                         .foregroundStyle(Color.white)
diff --git a/DevLog/UI/Login/LoginView.swift b/DevLog/UI/Login/LoginView.swift
index 30fafdfd..52c89a4b 100644
--- a/DevLog/UI/Login/LoginView.swift
+++ b/DevLog/UI/Login/LoginView.swift
@@ -25,17 +25,14 @@ struct LoginView: View {
                     LoginButton(logo: Image("Google"), text: String(localized: "login_google_sign_in")) {
                         viewModel.send(.tapSignInButton(.google))
                     }
-                    .frame(width: sceneWidth * 3 / 4, height: sceneWidth / 10)
                     
                     LoginButton(logo: Image("Github"), text: String(localized: "login_github_sign_in")) {
                         viewModel.send(.tapSignInButton(.github))
                     }
-                    .frame(width: sceneWidth * 3 / 4, height: sceneWidth / 10)
                         
                     LoginButton(logo: Image("Apple"), text: String(localized: "login_apple_sign_in")) {
                         viewModel.send(.tapSignInButton(.apple))
                     }
-                    .frame(width: sceneWidth * 3 / 4, height: sceneWidth / 10)
                 }
                 .padding(.bottom, 30)
                 Text(String(localized: "login_terms_notice"))
diff --git a/DevLog/UI/Profile/HeatmapView.swift b/DevLog/UI/Profile/HeatmapView.swift
index 617d11d5..c8861c88 100644
--- a/DevLog/UI/Profile/HeatmapView.swift
+++ b/DevLog/UI/Profile/HeatmapView.swift
@@ -8,8 +8,7 @@
 import SwiftUI
 
 struct HeatmapView: View {
-    @Environment(\.safeAreaInsets) private var safeAreaInsets
-    @Environment(\.sceneWidth) private var sceneWidth
+    @State private var availableWidth = CGFloat.zero
     let quarter: HeatmapQuarter
     let selectedActivityKinds: Set<ActivityKind>
     let selectedDay: HeatmapDay?
@@ -21,31 +20,32 @@ struct HeatmapView: View {
             weekCounts: quarter.months.map(\.weeks.count)
         )
 
-        HStack(alignment: .top, spacing: layout.monthSpacing) {
-            ForEach(quarter.months) { month in
-                MonthCompactHeatmapView(
-                    month: month,
-                    maxCount: maxCount,
-                    layout: layout,
-                    selectedActivityKinds: selectedActivityKinds,
-                    selectedDay: selectedDay,
-                    onSelectDay: onSelectDay
-                )
+        ScrollView(.horizontal) {
+            LazyHStack(alignment: .top, spacing: layout.monthSpacing) {
+                ForEach(quarter.months) { month in
+                    MonthCompactHeatmapView(
+                        month: month,
+                        maxCount: maxCount,
+                        layout: layout,
+                        selectedActivityKinds: selectedActivityKinds,
+                        selectedDay: selectedDay,
+                        onSelectDay: onSelectDay
+                    )
+                }
+            }
+            .padding(.vertical, 2)
+            .frame(width: layout.contentWidth, alignment: .leading)
+        }
+        .scrollIndicators(.hidden)
+        .scrollDisabled(true)
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .background {
+            GeometryReader { geometry in
+                Color.clear
+                    .onAppear { updateAvailableWidth(geometry.size.width) }
+                    .onChange(of: geometry.size.width) { updateAvailableWidth($1) }
             }
         }
-        .padding(.vertical, 2)
-    }
-
-    private var availableWidth: CGFloat {
-        // ProfileView의 바깥 가로 패딩(16)과 히트맵 카드 내부 패딩(12)을 합한 값
-        let horizontalPadding: CGFloat = 16 + 12
-        return max(
-            0,
-            sceneWidth
-                - safeAreaInsets.leading
-                - safeAreaInsets.trailing
-                - (horizontalPadding * 2)
-        )
     }
 
     private var maxCount: Int {
@@ -70,13 +70,22 @@ struct HeatmapView: View {
         }
         return value
     }
+
+    private func updateAvailableWidth(_ width: CGFloat) {
+        if availableWidth != width {
+            availableWidth = width
+        }
+    }
 }
 
 private struct HeatmapLayout {
+    private static let minimumCellSize: CGFloat = 8
+    private static let maximumCellSize: CGFloat = 22
     let cellSize: CGFloat
     let cellSpacing: CGFloat = 4
     let monthSpacing: CGFloat = 12
     let monthTitleSpacing: CGFloat = 6
+    let contentWidth: CGFloat
 
     init(availableWidth: CGFloat, weekCounts: [Int]) {
         let totalColumns = max(weekCounts.reduce(0, +), 1)
@@ -85,7 +94,9 @@ private struct HeatmapLayout {
         }
         let fixedWidth = monthSpacing * CGFloat(max(weekCounts.count - 1, 0))
             + cellSpacing * CGFloat(totalColumnSpacings)
-        cellSize = max(0, availableWidth - fixedWidth) / CGFloat(totalColumns)
+        let fittingCellSize = max(0, availableWidth - fixedWidth) / CGFloat(totalColumns)
+        cellSize = min(max(fittingCellSize, Self.minimumCellSize), Self.maximumCellSize)
+        contentWidth = cellSize * CGFloat(totalColumns) + fixedWidth
     }
 
     var cellCornerRadius: CGFloat {
diff --git a/DevLog/UI/PushNotification/PushNotificationListView.swift b/DevLog/UI/PushNotification/PushNotificationListView.swift
index 593b463e..7b5b433a 100644
--- a/DevLog/UI/PushNotification/PushNotificationListView.swift
+++ b/DevLog/UI/PushNotification/PushNotificationListView.swift
@@ -10,12 +10,12 @@ import SwiftUI
 struct PushNotificationListView: View {
     @State private var router = NavigationRouter()
     @State var viewModel: PushNotificationListViewModel
-    @Environment(\.sceneWidth) private var sceneWidth
     @Environment(\.colorScheme) private var colorScheme
     @Environment(\.diContainer) private var container: DIContainer
     @ScaledMetric(relativeTo: .body) private var headerHeight = 41
     @State private var headerOffset: CGFloat = 0
     @State private var isScrollTrackingEnabled = false
+    @ScaledMetric(relativeTo: .largeTitle) private var labelWidth = CGFloat(34)
 
     var body: some View {
         NavigationStack(path: $router.path) {
@@ -266,7 +266,7 @@ struct PushNotificationListView: View {
                 let todoCategoryItem = TodoCategoryItem(from: item.todoCategory)
                 RoundedRectangle(cornerRadius: 8)
                     .fill(todoCategoryItem.color)
-                    .frame(width: sceneWidth * 0.08, height: sceneWidth * 0.08)
+                    .frame(width: labelWidth, height: labelWidth)
                     .overlay {
                         Image(systemName: todoCategoryItem.symbolName)
                             .foregroundStyle(Color.white)
diff --git a/DevLog/UI/Search/SearchView.swift b/DevLog/UI/Search/SearchView.swift
index 2c63c3c5..8db33875 100644
--- a/DevLog/UI/Search/SearchView.swift
+++ b/DevLog/UI/Search/SearchView.swift
@@ -9,7 +9,6 @@ import SwiftUI
 
 struct SearchView: View {
     @Environment(\.dismiss) private var dismiss
-    @Environment(\.sceneWidth) private var sceneWidth
     @Environment(\.diContainer) private var container: DIContainer
     @State private var router = NavigationRouter()
     @State var viewModel: SearchViewModel