diff --git a/crates/style/src/computed.rs b/crates/style/src/computed.rs
index 7c8f86e..494be34 100644
--- a/crates/style/src/computed.rs
+++ b/crates/style/src/computed.rs
@@ -389,9 +389,11 @@ u {
 // Resolve a CssValue to f32 px given context
 // ---------------------------------------------------------------------------
 
-fn resolve_length(value: &CssValue, parent_font_size: f32, current_font_size: f32) -> Option<f32> {
+fn resolve_length(value: &CssValue, _parent_font_size: f32, current_font_size: f32) -> Option<f32> {
     match value {
-        CssValue::Length(n, unit) => Some(resolve_length_unit(*n, *unit, parent_font_size)),
+        // Em units resolve relative to the element's own computed font-size
+        // (for properties other than font-size, which has its own handling).
+        CssValue::Length(n, unit) => Some(resolve_length_unit(*n, *unit, current_font_size)),
         CssValue::Percentage(p) => Some((*p / 100.0) as f32 * current_font_size),
         CssValue::Zero => Some(0.0),
         CssValue::Number(n) if *n == 0.0 => Some(0.0),
@@ -734,7 +736,9 @@ fn apply_property(
 
         // Position offsets
         "top" => style.top = resolve_length_or_auto(value, parent_fs, current_fs),
+        "right" => style.right = resolve_length_or_auto(value, parent_fs, current_fs),
         "bottom" => style.bottom = resolve_length_or_auto(value, parent_fs, current_fs),
+        "left" => style.left = resolve_length_or_auto(value, parent_fs, current_fs),
 
         // Overflow
         "overflow" => {
@@ -1498,9 +1502,8 @@ mod tests {
         let div_node = &body_node.children[0];
 
         assert_eq!(div_node.style.font_size, 20.0);
-        // margin-top em resolves relative to parent font-size (16px body)
-        // because margin is not font-size itself
-        assert_eq!(div_node.style.margin_top, LengthOrAuto::Length(32.0));
+        // margin-top 2em resolves relative to the element's own computed font-size (20px)
+        assert_eq!(div_node.style.margin_top, LengthOrAuto::Length(40.0));
     }
 
     #[test]