diff --git a/internal/core/types.go b/internal/core/types.go
new file mode 100644
index 0000000..74e90b7
--- /dev/null
+++ b/internal/core/types.go
@@ -0,0 +1,23 @@
+package core
+
+import "github.com/charmbracelet/lipgloss"
+
+type Item string
+
+type Tier struct {
+	Name  string
+	Items []Item
+	Color lipgloss.Color
+}
+
+type SaveState struct {
+	Tiers []struct {
+		Name  string `json:"name"`
+		Items []Item `json:"items"`
+	} `json:"tiers"`
+}
+
+type Saver interface {
+	Save(filename string, state SaveState) error
+	Load(filename string) (SaveState, error)
+}
diff --git a/internal/styles/styles.go b/internal/styles/styles.go
new file mode 100644
index 0000000..5cdb040
--- /dev/null
+++ b/internal/styles/styles.go
@@ -0,0 +1,59 @@
+package styles
+
+import "github.com/charmbracelet/lipgloss"
+
+const red_color = "#FF7F7F"
+const orange_color = "#FFBF7F"
+const yellow_color = "#FFDF7F"
+const light_yellow_color = "#FFFF7F"
+const green_color = "#BFFF7F"
+const blue_color = "#7F7FFF"
+
+var (
+	TierColors = []lipgloss.Color{
+		lipgloss.Color(red_color),
+		lipgloss.Color(orange_color),
+		lipgloss.Color(yellow_color),
+		lipgloss.Color(light_yellow_color),
+		lipgloss.Color(green_color),
+		lipgloss.Color(blue_color),
+	}
+
+	TierLabelStyle = lipgloss.NewStyle().
+			Width(10).
+			Align(lipgloss.Center).
+			Bold(true).
+			Padding(1, 0).
+			MarginRight(1).Foreground(lipgloss.Color("0"))
+
+	ItemStyle = lipgloss.NewStyle().
+			Padding(0, 1).
+			Border(lipgloss.RoundedBorder()).
+			BorderForeground(lipgloss.Color("240")).
+			MarginRight(1)
+
+	SelectedItemStyle = ItemStyle.
+				BorderForeground(lipgloss.Color("69")).
+				Foreground(lipgloss.Color("255"))
+
+	DraggingItemStyle = ItemStyle.
+				BorderForeground(lipgloss.Color("220")).
+				Background(lipgloss.Color("236")).
+				Bold(true)
+
+	StatusStyle = lipgloss.NewStyle().
+			Foreground(lipgloss.Color("241")).
+			MarginTop(1)
+
+	InputBoxStyle = lipgloss.NewStyle().
+			Border(lipgloss.RoundedBorder()).
+			BorderForeground(lipgloss.Color("62")).
+			Padding(0, 1).
+			MarginTop(1)
+
+	HelpBoxStyle = lipgloss.NewStyle().
+			Border(lipgloss.RoundedBorder()).
+			BorderForeground(lipgloss.Color("62")).
+			Padding(1, 2).
+			Align(lipgloss.Left)
+)