diff --git a/Cargo.toml b/Cargo.toml
index 6b1acddd26..7202748a01 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,19 +12,19 @@ rust-version = "1.65"
 [dependencies]
 bitflags = "2.4.1"
 cosmic_undo_2 = { version = "0.2.0", optional = true }
-fontdb = { version = "0.16", default-features = false }
+fontdb = { version = "0.21", default-features = false }
 hashbrown = { version = "0.14.1", optional = true, default-features = false }
 libm = { version = "0.2.8", optional = true }
 log = "0.4.20"
 modit = { version = "0.1.4", optional = true }
 rangemap = "1.4.0"
 rustc-hash = { version = "1.1.0", default-features = false }
-rustybuzz = { version = "0.14", default-features = false, features = ["libm"] }
+rustybuzz = { version = "0.18", default-features = false }
 self_cell = "1.0.1"
 swash = { version = "0.1.17", optional = true }
 syntect = { version = "5.1.0", optional = true }
 sys-locale = { version = "0.3.1", optional = true }
-ttf-parser = { version = "0.21", default-features = false }
+ttf-parser = { version = "0.24", default-features = false }
 unicode-linebreak = "0.1.5"
 unicode-script = "0.5.5"
 unicode-segmentation = "1.10.1"
@@ -39,7 +39,7 @@ features = ["hardcoded-data"]
 default = ["std", "swash", "fontconfig"]
 fontconfig = ["fontdb/fontconfig", "std"]
 monospace_fallback = []
-no_std = ["rustybuzz/libm", "hashbrown", "dep:libm"]
+no_std = ["hashbrown", "dep:libm"]
 shape-run-cache = []
 std = [
     "fontdb/memmap",
@@ -48,7 +48,7 @@ std = [
     "sys-locale",
     "ttf-parser/std",
     "unicode-bidi/std",
-    "rayon"
+    "rayon",
 ]
 vi = ["modit", "syntect", "cosmic_undo_2"]
 wasm-web = ["sys-locale?/js"]
diff --git a/src/attrs/properties.rs b/src/attrs/properties.rs
new file mode 100644
index 0000000000..a1cc48d3cc
--- /dev/null
+++ b/src/attrs/properties.rs
@@ -0,0 +1,98 @@
+/// A [font family](https://www.w3.org/TR/2018/REC-css-fonts-3-20180920/#propdef-font-family).
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum Family<'a> {
+    /// The name of a font family of choice.
+    ///
+    /// This must be a *Typographic Family* (ID 16) or a *Family Name* (ID 1) in terms of TrueType.
+    /// Meaning you have to pass a family without any additional suffixes like _Bold_, _Italic_,
+    /// _Regular_, etc.
+    ///
+    /// Localized names are allowed.
+    Name(&'a str),
+
+    /// Serif fonts represent the formal text style for a script.
+    Serif,
+
+    /// Glyphs in sans-serif fonts, as the term is used in CSS, are generally low contrast
+    /// and have stroke endings that are plain — without any flaring, cross stroke,
+    /// or other ornamentation.
+    SansSerif,
+
+    /// Glyphs in cursive fonts generally use a more informal script style,
+    /// and the result looks more like handwritten pen or brush writing than printed letterwork.
+    Cursive,
+
+    /// Fantasy fonts are primarily decorative or expressive fonts that
+    /// contain decorative or expressive representations of characters.
+    Fantasy,
+
+    /// The sole criterion of a monospace font is that all glyphs have the same fixed width.
+    Monospace,
+}
+
+/// The degree to which a font is stretched, represented as a per mille (1/1000).
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub struct Stretch(pub u16);
+
+impl Stretch {
+    /// Ultra-condensed width (50%), the narrowest possible.
+    pub const ULTRA_CONDENSED: Stretch = Stretch(500);
+    /// Extra-condensed width (62.5%).
+    pub const EXTRA_CONDENSED: Stretch = Stretch(625);
+    /// Condensed width (75%).
+    pub const CONDENSED: Stretch = Stretch(750);
+    /// Semi-condensed width (87.5%).
+    pub const SEMI_CONDENSED: Stretch = Stretch(875);
+    /// Normal width (100%).
+    pub const NORMAL: Stretch = Stretch(1000);
+    /// Semi-expanded width (112.5%).
+    pub const SEMI_EXPANDED: Stretch = Stretch(1125);
+    /// Expanded width (125%).
+    pub const EXPANDED: Stretch = Stretch(1250);
+    /// Extra-expanded width (150%).
+    pub const EXTRA_EXPANDED: Stretch = Stretch(1500);
+    /// Ultra-expanded width (200%), the widest possible.
+    pub const ULTRA_EXPANDED: Stretch = Stretch(2000);
+
+    /// Gets the value as a ratio
+    pub fn ratio(&self) -> f32 {
+        self.0 as f32 / 1000.
+    }
+}
+
+/// The degree of blackness or stroke thickness of a font. This value ranges from 100 to 900,
+/// with 400 as normal.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub struct Weight(pub u16);
+
+impl Weight {
+    /// Thin weight (100), the thinnest value.
+    pub const THIN: Weight = Weight(100);
+    /// Extra light weight (200).
+    pub const EXTRA_LIGHT: Weight = Weight(200);
+    /// Light weight (300).
+    pub const LIGHT: Weight = Weight(300);
+    /// Normal (400).
+    pub const NORMAL: Weight = Weight(400);
+    /// Medium weight (500, higher than normal).
+    pub const MEDIUM: Weight = Weight(500);
+    /// Semibold weight (600).
+    pub const SEMIBOLD: Weight = Weight(600);
+    /// Bold weight (700).
+    pub const BOLD: Weight = Weight(700);
+    /// Extra-bold weight (800).
+    pub const EXTRA_BOLD: Weight = Weight(800);
+    /// Black weight (900), the thickest value.
+    pub const BLACK: Weight = Weight(900);
+}
+
+/// The degree to which a font is italicized.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub enum Style {
+    /// The font is normal, upright.
+    Normal,
+    /// The font is cursive.
+    Italic,
+    /// The font is slanted at a specific angle, measured in degrees between -90 and 90.
+    Oblique(i8),
+}