diff --git a/Cargo.lock b/Cargo.lock
index 41ac047..9167b24 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1622,7 +1622,7 @@ checksum = "afbdc74edc00b6f6a218ca6a5364d6226a259d4b8ea1af4a0ea063f27e179f4d"
 
 [[package]]
 name = "protextinator"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "ahash",
  "cosmic-text",
diff --git a/Cargo.toml b/Cargo.toml
index 3b6d640..638c871 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "protextinator"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 description = "Text management, made simple"
 keywords = ["text", "rendering", "gui", "graphics", "image"]
diff --git a/src/math.rs b/src/math.rs
index 6a320cf..416de65 100644
--- a/src/math.rs
+++ b/src/math.rs
@@ -33,7 +33,7 @@ impl Rect {
     /// assert_eq!(rect.height(), 50.0);
     /// ```
     #[inline(always)]
-    pub fn new(min: Point, max: Point) -> Self {
+    pub const fn new(min: Point, max: Point) -> Self {
         Self { min, max }
     }
 
@@ -47,7 +47,7 @@ impl Rect {
     /// assert_eq!(rect.height(), 50.0);
     /// ```
     #[inline(always)]
-    pub fn height(&self) -> f32 {
+    pub const fn height(&self) -> f32 {
         self.max.y - self.min.y
     }
 
@@ -61,7 +61,7 @@ impl Rect {
     /// assert_eq!(rect.width(), 100.0);
     /// ```
     #[inline(always)]
-    pub fn width(&self) -> f32 {
+    pub const fn width(&self) -> f32 {
         self.max.x - self.min.x
     }
 
@@ -75,7 +75,7 @@ impl Rect {
     /// assert_eq!(rect.size(), (100.0, 50.0));
     /// ```
     #[inline(always)]
-    pub fn size(&self) -> (f32, f32) {
+    pub const fn size(&self) -> (f32, f32) {
         (self.width(), self.height())
     }
 }
@@ -127,7 +127,7 @@ impl Point {
     /// assert_eq!(point.x, 10.0);
     /// assert_eq!(point.y, 20.0);
     /// ```
-    pub fn new(x: f32, y: f32) -> Self {
+    pub const fn new(x: f32, y: f32) -> Self {
         Self { x, y }
     }
 
@@ -141,7 +141,7 @@ impl Point {
     /// assert_eq!(point.to_tuple(), (10.0, 20.0));
     /// ```
     #[inline(always)]
-    pub fn to_tuple(self) -> (f32, f32) {
+    pub const fn to_tuple(self) -> (f32, f32) {
         (self.x, self.y)
     }
 
@@ -164,7 +164,7 @@ impl Point {
     /// assert!(!p1.approx_eq(&p2, 0.0001));
     /// ```
     #[inline(always)]
-    pub fn approx_eq(&self, other: &Self, epsilon: f32) -> bool {
+    pub const fn approx_eq(&self, other: &Self, epsilon: f32) -> bool {
         (self.x - other.x).abs() <= epsilon && (self.y - other.y).abs() <= epsilon
     }
 }
diff --git a/src/state.rs b/src/state.rs
index 2711323..20d4885 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -73,7 +73,7 @@ impl Selection {
     /// assert!(selection.is_empty());
     /// ```
     #[inline(always)]
-    pub fn is_empty(&self) -> bool {
+    pub const fn is_empty(&self) -> bool {
         self.origin_character_byte_cursor.is_none()
             || self.ends_before_character_byte_cursor.is_none()
     }
@@ -235,7 +235,7 @@ impl<T> TextState<T> {
     /// # let state = TextState::new_with_text("", &mut font_system, ());
     /// let width = state.caret_width();
     /// ```
-    pub fn caret_width(&self) -> f32 {
+    pub const fn caret_width(&self) -> f32 {
         self.caret_width
     }
 
@@ -454,7 +454,7 @@ impl<T> TextState<T> {
     /// let inner_size = state.inner_size();
     /// println!("Text content size: {}x{}", inner_size.x, inner_size.y);
     /// ```
-    pub fn inner_size(&self) -> Size {
+    pub const fn inner_size(&self) -> Size {
         self.inner_dimensions
     }
 
diff --git a/src/style.rs b/src/style.rs
index 6c3bef1..ab0ab36 100644
--- a/src/style.rs
+++ b/src/style.rs
@@ -89,7 +89,7 @@ impl FontSize {
     /// let font_size = FontSize::new(16.0);
     /// assert_eq!(font_size.value(), 16.0);
     /// ```
-    pub fn new(size: f32) -> Self {
+    pub const fn new(size: f32) -> Self {
         Self(size)
     }
 
@@ -102,7 +102,7 @@ impl FontSize {
     /// let font_size = FontSize::new(14.0);
     /// assert_eq!(font_size.value(), 14.0);
     /// ```
-    pub fn value(&self) -> f32 {
+    pub const fn value(&self) -> f32 {
         self.0
     }
 }
@@ -180,7 +180,7 @@ impl FontColor {
     ///
     /// let color = FontColor::new(Color::rgb(255, 0, 0));
     /// ```
-    pub fn new(color: Color) -> Self {
+    pub const fn new(color: Color) -> Self {
         Self(color)
     }
 
@@ -199,7 +199,7 @@ impl FontColor {
     /// let green = FontColor::rgb(0, 255, 0);
     /// let blue = FontColor::rgb(0, 0, 255);
     /// ```
-    pub fn rgb(r: u8, g: u8, b: u8) -> Self {
+    pub const fn rgb(r: u8, g: u8, b: u8) -> Self {
         Self(Color::rgb(r, g, b))
     }
 
@@ -218,7 +218,7 @@ impl FontColor {
     /// let semi_transparent_red = FontColor::rgba(255, 0, 0, 128);
     /// let opaque_blue = FontColor::rgba(0, 0, 255, 255);
     /// ```
-    pub fn rgba(r: u8, g: u8, b: u8, a: u8) -> Self {
+    pub const fn rgba(r: u8, g: u8, b: u8, a: u8) -> Self {
         Self(Color::rgba(r, g, b, a))
     }
 }
@@ -295,7 +295,7 @@ impl FontFamily {
     ///
     /// let sans_serif = FontFamily::sans_serif();
     /// ```
-    pub fn sans_serif() -> Self {
+    pub const fn sans_serif() -> Self {
         Self::SansSerif
     }
 
@@ -307,7 +307,7 @@ impl FontFamily {
     ///
     /// let serif = FontFamily::serif();
     /// ```
-    pub fn serif() -> Self {
+    pub const fn serif() -> Self {
         Self::Serif
     }
 
@@ -319,7 +319,7 @@ impl FontFamily {
     ///
     /// let monospace = FontFamily::monospace();
     /// ```
-    pub fn monospace() -> Self {
+    pub const fn monospace() -> Self {
         Self::Monospace
     }
 
@@ -384,7 +384,7 @@ pub enum HorizontalTextAlignment {
 }
 
 impl HorizontalTextAlignment {
-    pub fn is_centered(&self) -> bool {
+    pub const fn is_centered(&self) -> bool {
         matches!(self, HorizontalTextAlignment::Center)
     }
 }
@@ -476,10 +476,10 @@ impl TextStyle {
     ///
     /// let style = TextStyle::new(14.0, Color::rgb(0, 0, 0));
     /// ```
-    pub fn new(font_size: f32, font_color: Color) -> Self {
+    pub const fn new(font_size: f32, font_color: Color) -> Self {
         Self {
-            font_size: font_size.into(),
-            line_height: LineHeight::default(),
+            font_size: FontSize(font_size),
+            line_height: LineHeight::DEFAULT,
             font_color: FontColor(font_color),
             horizontal_alignment: HorizontalTextAlignment::Start,
             vertical_alignment: VerticalTextAlignment::Start,
@@ -499,8 +499,8 @@ impl TextStyle {
     ///
     /// let style = TextStyle::default().with_font_size(18.0);
     /// ```
-    pub fn with_font_size(mut self, font_size: f32) -> Self {
-        self.font_size = font_size.into();
+    pub const fn with_font_size(mut self, font_size: f32) -> Self {
+        self.font_size = FontSize(font_size);
         self
     }
 
@@ -515,8 +515,8 @@ impl TextStyle {
     ///
     /// let style = TextStyle::default().with_line_height(1.2);
     /// ```
-    pub fn with_line_height(mut self, line_height: f32) -> Self {
-        self.line_height = line_height.into();
+    pub const fn with_line_height(mut self, line_height: f32) -> Self {
+        self.line_height = LineHeight(line_height);
         self
     }
 
@@ -531,8 +531,8 @@ impl TextStyle {
     ///
     /// let style = TextStyle::default().with_font_color(FontColor::rgb(255, 0, 0));
     /// ```
-    pub fn with_font_color(mut self, font_color: impl Into<FontColor>) -> Self {
-        self.font_color = font_color.into();
+    pub const fn with_font_color(mut self, font_color: FontColor) -> Self {
+        self.font_color = font_color;
         self
     }
 
@@ -547,7 +547,7 @@ impl TextStyle {
     ///
     /// let style = TextStyle::default().with_horizontal_alignment(HorizontalTextAlignment::Center);
     /// ```
-    pub fn with_horizontal_alignment(mut self, alignment: HorizontalTextAlignment) -> Self {
+    pub const fn with_horizontal_alignment(mut self, alignment: HorizontalTextAlignment) -> Self {
         self.horizontal_alignment = alignment;
         self
     }
@@ -563,7 +563,7 @@ impl TextStyle {
     ///
     /// let style = TextStyle::default().with_vertical_alignment(VerticalTextAlignment::Center);
     /// ```
-    pub fn with_vertical_alignment(mut self, alignment: VerticalTextAlignment) -> Self {
+    pub const fn with_vertical_alignment(mut self, alignment: VerticalTextAlignment) -> Self {
         self.vertical_alignment = alignment;
         self
     }
@@ -583,7 +583,7 @@ impl TextStyle {
     ///     VerticalTextAlignment::Center
     /// );
     /// ```
-    pub fn with_alignment(
+    pub const fn with_alignment(
         mut self,
         horizontal: HorizontalTextAlignment,
         vertical: VerticalTextAlignment,
@@ -604,7 +604,7 @@ impl TextStyle {
     ///
     /// let style = TextStyle::default().with_wrap(TextWrap::Wrap);
     /// ```
-    pub fn with_wrap(mut self, wrap: TextWrap) -> Self {
+    pub const fn with_wrap(mut self, wrap: TextWrap) -> Self {
         self.wrap = Some(wrap);
         self
     }
@@ -622,7 +622,7 @@ impl TextStyle {
     /// assert_eq!(style.line_height_pt(), 24.0); // 16.0 * 1.5
     /// ```
     #[inline(always)]
-    pub fn line_height_pt(&self) -> f32 {
+    pub const fn line_height_pt(&self) -> f32 {
         self.line_height.0 * self.font_size.0
     }
 }