diff --git a/cmd/simple_ui/main.go b/cmd/simple_ui/main.go
new file mode 100644
index 0000000..7423213
--- /dev/null
+++ b/cmd/simple_ui/main.go
@@ -0,0 +1,7 @@
+package main
+
+import "simple_ui/internal/app"
+
+func main() {
+	app.Run()
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..0a6c530
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,15 @@
+module simple_ui
+
+go 1.24.5
+
+require gioui.org v0.8.0
+
+require (
+	gioui.org/shader v1.0.8 // indirect
+	github.com/go-text/typesetting v0.2.1 // indirect
+	golang.org/x/exp v0.0.0-20240707233637-46b078467d37 // indirect
+	golang.org/x/exp/shiny v0.0.0-20240707233637-46b078467d37 // indirect
+	golang.org/x/image v0.18.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..32c2072
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,17 @@
+gioui.org v0.8.0 h1:QV5p5JvsmSmGiIXVYOKn6d9YDliTfjtLlVf5J+BZ9Pg=
+gioui.org v0.8.0/go.mod h1:vEMmpxMOd/iwJhXvGVIzWEbxMWhnMQ9aByOGQdlQ8rc=
+gioui.org/cpu v0.0.0-20210808092351-bfe733dd3334/go.mod h1:A8M0Cn5o+vY5LTMlnRoK3O5kG+rH0kWfJjeKd9QpBmQ=
+gioui.org/shader v1.0.8 h1:6ks0o/A+b0ne7RzEqRZK5f4Gboz2CfG+mVliciy6+qA=
+gioui.org/shader v1.0.8/go.mod h1:mWdiME581d/kV7/iEhLmUgUK5iZ09XR5XpduXzbePVM=
+github.com/go-text/typesetting v0.2.1 h1:x0jMOGyO3d1qFAPI0j4GSsh7M0Q3Ypjzr4+CEVg82V8=
+github.com/go-text/typesetting v0.2.1/go.mod h1:mTOxEwasOFpAMBjEQDhdWRckoLLeI/+qrQeBCTGEt6M=
+golang.org/x/exp v0.0.0-20240707233637-46b078467d37 h1:uLDX+AfeFCct3a2C7uIWBKMJIR3CJMhcgfrUAqjRK6w=
+golang.org/x/exp v0.0.0-20240707233637-46b078467d37/go.mod h1:M4RDyNAINzryxdtnbRXRL/OHtkFuWGRjvuhBJpk2IlY=
+golang.org/x/exp/shiny v0.0.0-20240707233637-46b078467d37 h1:SOSg7+sueresE4IbmmGM60GmlIys+zNX63d6/J4CMtU=
+golang.org/x/exp/shiny v0.0.0-20240707233637-46b078467d37/go.mod h1:3F+MieQB7dRYLTmnncoFbb1crS5lfQoTfDgQy6K4N0o=
+golang.org/x/image v0.18.0 h1:jGzIakQa/ZXI1I0Fxvaa9W7yP25TqT6cHIHn+6CqvSQ=
+golang.org/x/image v0.18.0/go.mod h1:4yyo5vMFQjVjUcVk4jEQcU9MGy/rulF5WvUILseCM2E=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
diff --git a/internal/app/app.go b/internal/app/app.go
new file mode 100644
index 0000000..92a75e2
--- /dev/null
+++ b/internal/app/app.go
@@ -0,0 +1,101 @@
+package app
+
+import (
+	"log"
+	"os"
+	"simple_ui/internal/components"
+	"simple_ui/internal/ui"
+
+	"gioui.org/app"
+	"gioui.org/layout"
+	"gioui.org/op"
+	"gioui.org/unit"
+	"gioui.org/widget"
+	"gioui.org/widget/material"
+	"golang.org/x/exp/shiny/materialdesign/icons"
+)
+
+func Run() {
+	go runApp()
+	app.Main()
+}
+
+func runApp() {
+	w := &app.Window{}
+
+	w.Option(
+		app.Title("Simple UI"),
+		app.Size(800, 600),
+		app.MinSize(400, 300),
+	)
+
+	err := runWindowEvents(w)
+	if err != nil {
+		log.Fatal(err)
+	}
+	os.Exit(0)
+}
+
+func runWindowEvents(window *app.Window) error {
+	theme := material.NewTheme()
+	var ops op.Ops
+	currentPage := HomePage
+
+	navMenu := components.NewNavigationMenu(theme)
+
+	homeIcon, err := widget.NewIcon(icons.ActionHome)
+	if err != nil {
+		log.Fatalf("failed to create home icon: %v", err)
+	}
+	aboutIcon, err := widget.NewIcon(icons.ActionInfo)
+	if err != nil {
+		log.Fatalf("failed to create about icon: %v", err)
+	}
+
+	navMenu.AddItem("Home", homeIcon, func() { currentPage = HomePage })
+	navMenu.AddItem("About", aboutIcon, func() { currentPage = AboutPage })
+
+	navMenu.SetSelected(int(currentPage))
+
+	pages := []ui.Page{
+		HomePage:  ui.NewHomePage(theme),
+		AboutPage: ui.NewAboutPage(theme),
+	}
+
+	for {
+		switch e := window.Event().(type) {
+		case app.DestroyEvent:
+			return e.Err
+		case app.FrameEvent:
+			gtx := app.NewContext(&ops, e)
+
+			navMenu.HandleClicks(gtx)
+			navMenu.SetSelected(int(currentPage))
+
+			layout.Flex{
+				Axis: layout.Horizontal,
+			}.Layout(gtx,
+				layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+					return navMenu.Layout(gtx)
+				}),
+				layout.Flexed(1, func(gtx layout.Context) layout.Dimensions {
+					return layout.Inset{
+						Top:    unit.Dp(16),
+						Bottom: unit.Dp(16),
+						Left:   unit.Dp(16),
+						Right:  unit.Dp(16),
+					}.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+						return pages[currentPage].Layout(gtx)
+					})
+				}),
+			)
+
+			e.Frame(gtx.Ops)
+		}
+	}
+}
+
+const (
+	HomePage = iota
+	AboutPage
+)
diff --git a/internal/components/dropdown.go b/internal/components/dropdown.go
new file mode 100644
index 0000000..9a120c7
--- /dev/null
+++ b/internal/components/dropdown.go
@@ -0,0 +1,25 @@
+package components
+
+import (
+	"gioui.org/layout"
+	"gioui.org/widget"
+	"gioui.org/widget/material"
+)
+
+type Dropdown struct {
+	Editor   widget.Editor
+	Clicks   []*widget.Clickable
+	Options  []string
+	Filtered []string
+	Show     bool
+}
+
+func NewDropdown(options []string) *Dropdown {
+	return &Dropdown{
+		Options: options,
+	}
+}
+
+func (d *Dropdown) Layout(gtx layout.Context, th *material.Theme, hint string) (layout.Dimensions, string) {
+	return layout.Dimensions{}, ""
+}
diff --git a/internal/components/icon_button.go b/internal/components/icon_button.go
new file mode 100644
index 0000000..042e9a7
--- /dev/null
+++ b/internal/components/icon_button.go
@@ -0,0 +1,89 @@
+package components
+
+import (
+	"image"
+
+	"gioui.org/layout"
+	"gioui.org/unit"
+	"gioui.org/widget"
+	"gioui.org/widget/material"
+)
+
+type ButtonState int
+
+const (
+	NormalButton ButtonState = iota
+	SelectedButton
+	UnselectedButton
+)
+
+type iconAndTextButton struct {
+	theme  *material.Theme
+	button *widget.Clickable
+	icon   *widget.Icon
+	word   string
+	axis   layout.Axis
+	state  ButtonState
+}
+
+func (b iconAndTextButton) Layout(gtx layout.Context) layout.Dimensions {
+	btn := material.ButtonLayout(b.theme, b.button)
+	switch b.state {
+	case NormalButton:
+		btn.Background = b.theme.Palette.Bg
+	case SelectedButton:
+		btn.Background = b.theme.Palette.ContrastBg
+	case UnselectedButton:
+		btn.Background = b.theme.Palette.Bg
+	}
+
+	return btn.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+		return layout.UniformInset(unit.Dp(12)).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+			iconAndLabel := layout.Flex{Axis: b.axis, Alignment: layout.Middle}
+			var bottomSpacer, textIconSpacer unit.Dp
+
+			if b.axis == layout.Horizontal {
+				bottomSpacer = unit.Dp(0)
+				textIconSpacer = unit.Dp(2)
+			} else {
+				bottomSpacer = unit.Dp(2)
+				textIconSpacer = unit.Dp(0)
+			}
+
+			layIcon := layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+				return layout.Inset{Bottom: bottomSpacer, Right: textIconSpacer}.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+					var d layout.Dimensions
+					if b.icon != nil {
+						size := gtx.Dp(unit.Dp(24))
+
+						if b.axis == layout.Horizontal {
+							size = gtx.Dp(unit.Dp(56)) - 2*gtx.Dp(unit.Dp(16))
+						}
+
+						gtx.Constraints = layout.Exact(image.Pt(size, size))
+						if b.state == SelectedButton {
+							d = b.icon.Layout(gtx, b.theme.Palette.ContrastFg)
+						} else {
+							d = b.icon.Layout(gtx, b.theme.Palette.Fg)
+						}
+					}
+					return d
+				})
+			})
+
+			layLabel := layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+				return layout.Inset{Top: bottomSpacer, Right: textIconSpacer}.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+					l := material.Body1(b.theme, b.word)
+					if b.state == SelectedButton {
+						l.Color = b.theme.Palette.ContrastFg
+					} else {
+						l.Color = b.theme.Palette.Fg
+					}
+					return l.Layout(gtx)
+				})
+			})
+
+			return iconAndLabel.Layout(gtx, layIcon, layLabel)
+		})
+	})
+}
diff --git a/internal/components/navigation_menu.go b/internal/components/navigation_menu.go
new file mode 100644
index 0000000..af9f94c
--- /dev/null
+++ b/internal/components/navigation_menu.go
@@ -0,0 +1,194 @@
+package components
+
+import (
+	"fmt"
+	"image/color"
+	"simple_ui/internal/utils"
+	"time"
+
+	"gioui.org/layout"
+	"gioui.org/op/clip"
+	"gioui.org/op/paint"
+	"gioui.org/unit"
+	"gioui.org/widget"
+	"gioui.org/widget/material"
+	"golang.org/x/exp/shiny/materialdesign/icons"
+)
+
+type NavigationMenu struct {
+	theme          *material.Theme
+	contractButton *widget.Clickable
+	items          []MenuItem
+	contracted     bool
+	selected       int
+	anim           utils.Animation
+}
+
+type MenuItem struct {
+	Label   string
+	Button  *widget.Clickable
+	Icon    *widget.Icon
+	OnClick func()
+}
+
+func NewNavigationMenu(theme *material.Theme) *NavigationMenu {
+	nm := &NavigationMenu{
+		theme:          theme,
+		contractButton: &widget.Clickable{},
+		items:          make([]MenuItem, 0),
+	}
+	nm.anim.Start(0, 0, 0, utils.EasingInOutSine)
+	return nm
+}
+
+func (nm *NavigationMenu) ToggleContracted() {
+	nm.contracted = !nm.contracted
+	var end float32
+	if nm.contracted {
+		end = 1
+	} else {
+		end = 0
+	}
+	nm.anim.Start(nm.anim.Current(), end, 250*time.Millisecond, utils.EasingInOutSine)
+	fmt.Printf("Navigation menu toggled: %v\n", nm.contracted)
+}
+
+func (nm *NavigationMenu) IsContracted() bool {
+	return nm.contracted
+}
+
+func (nm *NavigationMenu) AddItem(label string, icon *widget.Icon, onClick func()) *widget.Clickable {
+	btn := &widget.Clickable{}
+	nm.items = append(nm.items, MenuItem{
+		Label:   label,
+		Button:  btn,
+		Icon:    icon,
+		OnClick: onClick,
+	})
+	return btn
+}
+
+func (nm *NavigationMenu) SetSelected(index int) {
+	if index >= 0 && index < len(nm.items) {
+		nm.selected = index
+	}
+}
+
+func (nm *NavigationMenu) HandleClicks(gtx layout.Context) {
+	for i, item := range nm.items {
+		if item.Button.Clicked(gtx) {
+			nm.selected = i
+			if item.OnClick != nil {
+				item.OnClick()
+			}
+		}
+	}
+}
+
+func (nm *NavigationMenu) Layout(gtx layout.Context) layout.Dimensions {
+	// Animate contraction/expansion
+	value := nm.anim.Update(gtx)
+	contractedWidth := float32(gtx.Dp(unit.Dp(100)))
+	expandedWidth := float32(gtx.Dp(unit.Dp(240)))
+	width := int(expandedWidth + (contractedWidth-expandedWidth)*value)
+	gtx.Constraints.Min.X = width
+	gtx.Constraints.Max.X = width
+
+	// Add background color
+	backgroundColor := color.NRGBA{R: 205, G: 205, B: 205, A: 255} // Blue
+	return layout.Background{}.Layout(gtx,
+		func(gtx layout.Context) layout.Dimensions {
+			paint.FillShape(gtx.Ops, backgroundColor, clip.Rect{Max: gtx.Constraints.Min}.Op())
+			return layout.Dimensions{Size: gtx.Constraints.Min}
+		},
+		func(gtx layout.Context) layout.Dimensions {
+			return layout.Flex{
+				Axis: layout.Vertical,
+			}.Layout(gtx,
+				layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+
+					return layout.UniformInset(unit.Dp(8)).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+						return layout.Flex{
+							Axis:      layout.Horizontal,
+							Alignment: layout.Middle,
+						}.Layout(gtx,
+							layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+								if nm.contracted {
+									return layout.Dimensions{}
+								}
+								return material.H6(nm.theme, "Simple Weather").Layout(gtx)
+							}),
+							layout.Flexed(1, func(gtx layout.Context) layout.Dimensions {
+								return layout.Spacer{Width: unit.Dp(16)}.Layout(gtx)
+							}),
+							layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+								contractedIcon, err := widget.NewIcon(icons.NavigationChevronLeft)
+								if err != nil {
+									return layout.Dimensions{}
+								}
+								if nm.IsContracted() {
+									contractedIcon, err = widget.NewIcon(icons.NavigationChevronRight)
+									if err != nil {
+										return layout.Dimensions{}
+									}
+								}
+
+								if nm.contractButton.Clicked(gtx) {
+									nm.ToggleContracted()
+								}
+								contractButton := material.IconButton(nm.theme, nm.contractButton, contractedIcon, "Toggle menu")
+								contractButton.Background = nm.theme.Palette.Bg
+								contractButton.Color = nm.theme.Palette.Fg
+
+								return contractButton.Layout(gtx)
+							}),
+						)
+					})
+				}),
+				layout.Flexed(1, func(gtx layout.Context) layout.Dimensions {
+					return layout.Flex{
+						Axis: layout.Vertical,
+					}.Layout(gtx, nm.menuItems()...)
+				}),
+			)
+		},
+	)
+}
+
+func (nm *NavigationMenu) menuItems() []layout.FlexChild {
+	children := make([]layout.FlexChild, len(nm.items))
+
+	for i, item := range nm.items {
+		i, item := i, item
+		children[i] = layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+
+			var state ButtonState
+
+			if i == nm.selected {
+				state = SelectedButton
+			} else {
+				state = UnselectedButton
+			}
+			axis := layout.Horizontal
+
+			if nm.IsContracted() {
+				axis = layout.Vertical
+			}
+
+			btn := &iconAndTextButton{
+				theme:  nm.theme,
+				button: item.Button,
+				icon:   item.Icon,
+				word:   item.Label,
+				state:  state,
+				axis:   axis,
+			}
+
+			return layout.Inset{Top: unit.Dp(2), Bottom: unit.Dp(2), Left: unit.Dp(4), Right: unit.Dp(4)}.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+				return btn.Layout(gtx)
+			})
+		})
+	}
+
+	return children
+}
diff --git a/internal/ui/about_page.go b/internal/ui/about_page.go
new file mode 100644
index 0000000..283308e
--- /dev/null
+++ b/internal/ui/about_page.go
@@ -0,0 +1,29 @@
+package ui
+
+import (
+	"gioui.org/layout"
+	"gioui.org/widget/material"
+)
+
+type AboutPage struct {
+	theme *material.Theme
+}
+
+func NewAboutPage(theme *material.Theme) *AboutPage {
+	return &AboutPage{
+		theme: theme,
+	}
+}
+
+func (p *AboutPage) Layout(gtx layout.Context) layout.Dimensions {
+	return layout.UniformInset(16).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+		return layout.Flex{
+			Axis: layout.Vertical,
+		}.Layout(gtx,
+			layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+				body := material.Body1(p.theme, "This is a simple UI application built with Gio.")
+				return body.Layout(gtx)
+			}),
+		)
+	})
+}
diff --git a/internal/ui/home.go b/internal/ui/home.go
new file mode 100644
index 0000000..e1565a2
--- /dev/null
+++ b/internal/ui/home.go
@@ -0,0 +1,63 @@
+package ui
+
+import (
+	"gioui.org/layout"
+	"gioui.org/widget"
+	"gioui.org/widget/material"
+)
+
+type HomePage struct {
+	searchButton *widget.Clickable
+	searchField  *widget.Editor
+	theme        *material.Theme
+}
+
+func NewHomePage(theme *material.Theme) *HomePage {
+	return &HomePage{
+		searchButton: &widget.Clickable{},
+		theme:        theme,
+		searchField:  &widget.Editor{SingleLine: true},
+	}
+}
+
+func searchClicked(searchField *widget.Editor) {
+	query := searchField.Text()
+	searchField.SetText("")
+	println("Search query:", query)
+}
+
+func (h *HomePage) Layout(gtx layout.Context) layout.Dimensions {
+	return layout.UniformInset(16).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+		return layout.Flex{
+			Axis: layout.Vertical,
+		}.Layout(gtx,
+			layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+				return layout.Center.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+					return layout.Flex{
+						Axis: layout.Vertical,
+					}.Layout(gtx,
+						layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+							return layout.Flex{
+								Axis: layout.Horizontal,
+							}.Layout(gtx,
+								layout.Flexed(0.5, func(gtx layout.Context) layout.Dimensions {
+									return material.Editor(h.theme, h.searchField, "Search...").Layout(gtx)
+								}),
+								layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+									if h.searchButton.Clicked(gtx) {
+										searchClicked(h.searchField)
+									}
+									return material.Button(h.theme, h.searchButton, "Search").Layout(gtx)
+								}),
+							)
+						}),
+					)
+				})
+			}),
+			layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+
+				return layout.Dimensions{}
+			}),
+		)
+	})
+}
diff --git a/internal/ui/page.go b/internal/ui/page.go
new file mode 100644
index 0000000..26924e3
--- /dev/null
+++ b/internal/ui/page.go
@@ -0,0 +1,9 @@
+package ui
+
+import (
+	"gioui.org/layout"
+)
+
+type Page interface {
+	Layout(gtx layout.Context) layout.Dimensions
+}
diff --git a/internal/utils/animation.go b/internal/utils/animation.go
new file mode 100644
index 0000000..32b6e9a
--- /dev/null
+++ b/internal/utils/animation.go
@@ -0,0 +1,79 @@
+package utils
+
+import (
+	"math"
+	"time"
+
+	"gioui.org/layout"
+	"gioui.org/op"
+)
+
+type Animation struct {
+	start     float32
+	end       float32
+	current   float32
+	startTime time.Time
+	duration  time.Duration
+	active    bool
+	Easing    Easing
+}
+
+type Easing int
+
+const (
+	None Easing = iota
+	EasingIn
+	EasingOut
+	EasingOutSine
+	EasingInOutSine
+)
+
+func (a *Animation) Current() float32 {
+	return a.current
+}
+
+func applyEasing(easing Easing, t float32) float32 {
+	switch easing {
+	case EasingIn:
+		return t * t
+	case EasingOut:
+		return t * (2 - t)
+	case EasingOutSine:
+		return float32(math.Sin(float64(t) * math.Pi / 2))
+	case EasingInOutSine:
+		return float32(-0.5 * (math.Cos(math.Pi*float64(t)) - 1))
+	default:
+		return t
+	}
+}
+
+func (a *Animation) Start(start, end float32, duration time.Duration, easing Easing) {
+	a.start = start
+	a.end = end
+	a.current = start
+	a.startTime = time.Now()
+	a.duration = duration
+	a.Easing = easing
+	a.active = true
+}
+
+func (a *Animation) Update(gtx layout.Context) float32 {
+	if !a.active {
+		return a.current
+	}
+
+	elapsed := time.Since(a.startTime)
+
+	if elapsed >= a.duration {
+		a.current = a.end
+		a.active = false
+	} else {
+		progress := float32(elapsed) / float32(a.duration)
+		eased := applyEasing(a.Easing, progress)
+		a.current = a.start + (a.end-a.start)*eased
+	}
+
+	gtx.Execute(&op.InvalidateCmd{})
+
+	return a.current
+}