diff --git a/src/context.rs b/src/context.rs
index 9fb620108..8cebed503 100644
--- a/src/context.rs
+++ b/src/context.rs
@@ -231,4 +231,11 @@ impl<'i, 'o> PropertyHandlerContext<'i, 'o> {
     self.rtl.clear();
     self.dark.clear();
   }
+
+  pub fn merge(&mut self, other: Self) {
+    self.supports.extend(other.supports);
+    self.ltr.extend(other.ltr);
+    self.rtl.extend(other.rtl);
+    self.dark.extend(other.dark);
+  }
 }
diff --git a/src/lib.rs b/src/lib.rs
index dc40670a8..62c523308 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -30379,4 +30379,39 @@ mod tests {
       },
     );
   }
+
+  #[test]
+  fn test_nested_declarations_logical_properties() {
+    nesting_test(
+      r#"
+        .foo {
+          :where(&) { width: unset; }
+          border-start-start-radius: 10px;
+        }
+      "#,
+      indoc! {r#"
+        :where(.foo) {
+          width: unset;
+        }
+
+        .foo {
+          border-start-start-radius: 10px;
+        }
+      "#},
+    );
+
+    prefix_test(
+      r#"
+      .foo {
+        :where(&) { width: unset; }
+        border-start-start-radius: 10px;
+      }
+    "#,
+      ".foo:not(:-webkit-any(:lang(ae), :lang(ar), :lang(arc), :lang(bcc), :lang(bqi), :lang(ckb), :lang(dv), :lang(fa), :lang(glk), :lang(he), :lang(ku), :lang(mzn), :lang(nqo), :lang(pnb), :lang(ps), :lang(sd), :lang(ug), :lang(ur), :lang(yi))) {\n  border-top-left-radius: 10px;\n}\n\n.foo:not(:is(:lang(ae), :lang(ar), :lang(arc), :lang(bcc), :lang(bqi), :lang(ckb), :lang(dv), :lang(fa), :lang(glk), :lang(he), :lang(ku), :lang(mzn), :lang(nqo), :lang(pnb), :lang(ps), :lang(sd), :lang(ug), :lang(ur), :lang(yi))) {\n  border-top-left-radius: 10px;\n}\n\n.foo:-webkit-any(:lang(ae), :lang(ar), :lang(arc), :lang(bcc), :lang(bqi), :lang(ckb), :lang(dv), :lang(fa), :lang(glk), :lang(he), :lang(ku), :lang(mzn), :lang(nqo), :lang(pnb), :lang(ps), :lang(sd), :lang(ug), :lang(ur), :lang(yi)) {\n  border-top-right-radius: 10px;\n}\n\n.foo:is(:lang(ae), :lang(ar), :lang(arc), :lang(bcc), :lang(bqi), :lang(ckb), :lang(dv), :lang(fa), :lang(glk), :lang(he), :lang(ku), :lang(mzn), :lang(nqo), :lang(pnb), :lang(ps), :lang(sd), :lang(ug), :lang(ur), :lang(yi)) {\n  border-top-right-radius: 10px;\n}\n\n:where(.foo) {\n  width: unset;\n}\n\n\n",
+      Browsers {
+        chrome: Some(70 << 16),
+        ..Browsers::default()
+      },
+    );
+  }
 }
diff --git a/src/rules/style.rs b/src/rules/style.rs
index ce3cd4592..c3bc2d255 100644
--- a/src/rules/style.rs
+++ b/src/rules/style.rs
@@ -94,7 +94,10 @@ impl<'i, T: Clone> StyleRule<'i, T> {
       let mut handler_context = context.handler_context.child(DeclarationContext::StyleRule);
       std::mem::swap(&mut context.handler_context, &mut handler_context);
       self.rules.minify(context, unused)?;
-      context.handler_context = handler_context;
+      // Merge any logical/conditional rules from nested declarations back into the parent context.
+      // These will be collected by the caller when generating additional rules for this style rule.
+      let child_context = std::mem::replace(&mut context.handler_context, handler_context);
+      context.handler_context.merge(child_context);
       if unused && self.rules.0.is_empty() {
         return Ok(true);
       }