diff --git a/gshmm.go b/gshmm.go
index cf76639..d155731 100644
--- a/gshmm.go
+++ b/gshmm.go
@@ -4,6 +4,7 @@ package main
 import (
 	"flag"
 	"fmt"
+	"log"
 	"os"
 	"path/filepath"
 	"strings"
@@ -15,6 +16,7 @@ import (
 	"github.com/charmbracelet/lipgloss"
 	pdf "github.com/johbar/go-poppler"
 	"github.com/sahilm/fuzzy"
+	"golang.org/x/term"
 )
 
 // filenameFilterMode searches by PDF file name.
@@ -67,17 +69,17 @@ func readPDF(name string) (string, error) {
 
 // model offers the core of the state for the entire UI.
 type model struct {
-	input textinput.Model // Fuzzy search interface
+	input      textinput.Model // Fuzzy search interface
+	filterMode string          // The filtering mode ("filename", "content")
 
-	datasheets           []datasheet   // All datasheets under cwd
-	datasheetNames       []string      // All datasheet names (caching)
-	filteredDatasheets   []string      // Filtered view on all datasheets
-	loadDatasheetSpinner spinner.Model // Spinner to show while loading datasheets
-	datasheetsLoaded     bool          // Whether or not the datasheets are loaded or not
-
-	datasheetViewport viewport.Model // Viewport for the PDF content
-
-	filterMode string // The filtering mode ("filename", "content")
+	datasheets             []datasheet    // All datasheets under cwd
+	datasheetNames         []string       // All datasheet names (caching)
+	datasheetsStyle        lipgloss.Style // Style to use for listing datasheets
+	filteredDatasheets     []string       // Filtered view on all datasheets
+	loadDatasheetSpinner   spinner.Model  // Spinner to show while loading datasheets
+	datasheetsLoaded       bool           // Whether or not the datasheets are loaded or not
+	datasheetViewport      viewport.Model // Viewport for the PDF content
+	datasheetViewportStyle lipgloss.Style // Style to show while showing datasheet viewport
 }
 
 // datasheetFromName retrieves a datasheet via a name.
@@ -107,25 +109,38 @@ type datasheet struct {
 }
 
 // initialModel constucts an initial state for the UI.
-func initialModel() model {
+func initialModel(width int, height int) model {
 	input := textinput.New()
 	input.Focus()
 
-	// TODO: set width/heigh to match terminal. this should also
-	//       be set in relation to the list of filenames also. they
-	//       should have some visually pleasing ratio set i imagine
-	viewp := viewport.New(60, 30)
+	datasheetViewport := viewport.New(width/2+20, height/2)
+	datasheetViewportStyle := lipgloss.NewStyle().
+		BorderStyle(lipgloss.NormalBorder()).
+		BorderForeground(lipgloss.Color("63")).
+		Padding(2)
 
 	loadDatasheetSpinner := spinner.New()
 	loadDatasheetSpinner.Spinner = spinner.Dot
-	loadDatasheetSpinner.Style = lipgloss.NewStyle().Foreground(lipgloss.Color("205"))
+	loadDatasheetSpinner.Style = lipgloss.NewStyle().
+		Foreground(lipgloss.Color("205"))
+
+	datasheetsStyle := lipgloss.NewStyle().
+		Width(width/2 - 30).
+		Height(height/2 - 30).
+		MarginRight(2).
+		BorderStyle(lipgloss.NormalBorder()).
+		BorderForeground(lipgloss.Color("63")).
+		Padding(2)
 
 	m := model{
-		input:                input,
-		datasheetsLoaded:     false,
-		loadDatasheetSpinner: loadDatasheetSpinner,
-		datasheetViewport:    viewp,
-		filterMode:           filenameFilterMode,
+		input:      input,
+		filterMode: filenameFilterMode,
+
+		datasheetsLoaded:       false,
+		loadDatasheetSpinner:   loadDatasheetSpinner,
+		datasheetViewport:      datasheetViewport,
+		datasheetViewportStyle: datasheetViewportStyle,
+		datasheetsStyle:        datasheetsStyle,
 	}
 
 	return m
@@ -235,7 +250,6 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		m.datasheetViewport.SetContent(viewportText)
 	}
 
-	// TODO: handle terminal resizing
 	switch msg := msg.(type) {
 	case loadedDatasheetsMsg:
 		m.datasheets = msg.datasheets
@@ -246,6 +260,9 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		m.datasheetViewport.SetContent(selectedDatasheet)
 
 		m.datasheetsLoaded = true
+	case tea.WindowSizeMsg:
+		// TODO: handle terminal resizing
+		//       resize listing / viewport
 	case tea.KeyMsg:
 		switch msg.String() {
 		case "ctrl+c":
@@ -271,7 +288,11 @@ func (m model) View() string {
 	}
 
 	// TODO: style further with lipgloss, e.g. borders, margins, etc.
-	panes := lipgloss.JoinHorizontal(lipgloss.Left, sheets, m.datasheetViewport.View())
+	panes := lipgloss.JoinHorizontal(
+		lipgloss.Left,
+		m.datasheetsStyle.Render(sheets),
+		m.datasheetViewportStyle.Render(m.datasheetViewport.View()),
+	)
 
 	body.WriteString(panes)
 
@@ -303,13 +324,17 @@ func main() {
 
 	f, err := tea.LogToFile("debug.log", "debug")
 	if err != nil {
-		fmt.Println("fatal:", err)
-		os.Exit(1)
+		log.Fatal(err)
 	}
 	defer f.Close()
 
+	width, height, err := term.GetSize(0)
+	if err != nil {
+		log.Fatal(err)
+	}
+
 	p := tea.NewProgram(
-		initialModel(),
+		initialModel(width, height),
 		tea.WithAltScreen(),
 		tea.WithMouseCellMotion(),
 	)