diff --git a/include/spaic-css/CSS.hpp b/include/spaic-css/CSS.hpp
index f661ea1..708594f 100644
--- a/include/spaic-css/CSS.hpp
+++ b/include/spaic-css/CSS.hpp
@@ -5,9 +5,9 @@
 namespace spaic::css
 {
 template <typename... T>
-Stylesheet css(T... params);
+Stylesheet css(T&&... params);
 template <typename... T>
-Stylesheet keyframes(T... params);
+Stylesheet keyframes(T&&... params);
 } // namespace spaic::css
 
 #include <spaic-css/detail/CSS.hpp>
\ No newline at end of file
diff --git a/include/spaic-css/CssProperty.hpp b/include/spaic-css/CssProperty.hpp
index 12f6093..4a7b2d2 100644
--- a/include/spaic-css/CssProperty.hpp
+++ b/include/spaic-css/CssProperty.hpp
@@ -11,7 +11,8 @@ template <typename T>
 class CssProperty
 {
 public:
-    AssignedCssProperty<T> operator=(T value);
+    template <typename U>
+    AssignedCssProperty<T> operator=(U&& value);
 };
 } // namespace spaic::css::prop
 
diff --git a/include/spaic-css/Unit.hpp b/include/spaic-css/Unit.hpp
index 0ea99c0..06c7599 100644
--- a/include/spaic-css/Unit.hpp
+++ b/include/spaic-css/Unit.hpp
@@ -58,7 +58,7 @@ class CssUnit
     long double value;
 
 public:
-    CssUnit(long double value) noexcept : value(value) {}
+    CssUnit(long double value) noexcept;
 
     std::string toCssValue();
 };
@@ -99,4 +99,6 @@ defineUnitUDL(percent);
 } // namespace spaic::css::unit
 
 #undef defineUnitUDLRaw
-#undef defineUnitUDL
\ No newline at end of file
+#undef defineUnitUDL
+
+#include <spaic-css/detail/Unit.hpp>
\ No newline at end of file
diff --git a/include/spaic-css/detail/CSS.hpp b/include/spaic-css/detail/CSS.hpp
index cb4640e..bde1c6a 100644
--- a/include/spaic-css/detail/CSS.hpp
+++ b/include/spaic-css/detail/CSS.hpp
@@ -5,9 +5,15 @@
 namespace spaic::css
 {
 template <typename... T>
-Stylesheet css(T... params)
+Stylesheet css(T&&... params)
 {
     // TODO: css(params)
     return Stylesheet();
 }
+template<typename ...T>
+Stylesheet keyframes(T&&... params)
+{
+    // TODO: keyframes(params)
+    return Stylesheet();
+}
 } // namespace spaic::css
diff --git a/include/spaic-css/detail/CssProperty.hpp b/include/spaic-css/detail/CssProperty.hpp
index 09fa61e..fd8947c 100644
--- a/include/spaic-css/detail/CssProperty.hpp
+++ b/include/spaic-css/detail/CssProperty.hpp
@@ -4,11 +4,10 @@
 
 namespace spaic::css::prop
 {
-
 template <typename T>
-AssignedCssProperty<T> CssProperty<T>::operator=(T value)
+template <typename U>
+AssignedCssProperty<T> CssProperty<T>::operator=(U&& value)
 {
     return AssignedCssProperty<T>();
 }
-
 } // namespace spaic::css::prop
\ No newline at end of file
diff --git a/include/spaic-css/detail/Unit.hpp b/include/spaic-css/detail/Unit.hpp
new file mode 100644
index 0000000..5787d1d
--- /dev/null
+++ b/include/spaic-css/detail/Unit.hpp
@@ -0,0 +1,9 @@
+#pragma once
+
+#include <spaic-css/Unit.hpp>
+
+namespace spaic::css::unit
+{
+    template <CssUnitType T>
+    CssUnit<T>::CssUnit(long double value) noexcept : value(value) {}
+} // namespace spaic::css::unit
diff --git a/include/spaic-dom/Render.hpp b/include/spaic-dom/Render.hpp
index a13e232..91baded 100644
--- a/include/spaic-dom/Render.hpp
+++ b/include/spaic-dom/Render.hpp
@@ -5,5 +5,5 @@
 
 namespace spaic::dom
 {
-std::string render(spaic::vnode::VNode node);
+std::string render(const spaic::vnode::VNode &node);
 }
\ No newline at end of file
diff --git a/include/spaic/Component.hpp b/include/spaic/Component.hpp
index 2dc3fde..72e655a 100644
--- a/include/spaic/Component.hpp
+++ b/include/spaic/Component.hpp
@@ -9,6 +9,7 @@ namespace spaic::vnode
 {
 class VNode;
 }
+
 namespace spaic::comp
 {
 using NativeNodeName = std::optional<const char *>;
@@ -19,7 +20,7 @@ class ComponentParent
     const NativeNodeName native_node_name;
     const std::vector<spaic::vnode::VNode> children;
 
-    ComponentParent(NativeNodeName native_node_name, std::vector<spaic::vnode::VNode> children);
+    ComponentParent(NativeNodeName native_node_name, std::vector<spaic::vnode::VNode> &&children);
 };
 class ComponentSingle
 {
@@ -29,7 +30,7 @@ class ComponentSingle
     ComponentSingle(NativeNodeName native_node_name);
 
     template <typename... T>
-    ComponentParent operator()(T... children) noexcept;
+    ComponentParent operator()(T&&... children) noexcept;
 };
 template <typename Props>
 class Component
@@ -39,7 +40,7 @@ class Component
 
     Component(NativeNodeName native_node_name);
     template <typename... T>
-    ComponentSingle operator()(T... args) noexcept;
+    ComponentSingle operator()(T&&... args) noexcept;
 };
 } // namespace spaic::comp
 
diff --git a/include/spaic/ComponentPart.hpp b/include/spaic/ComponentPart.hpp
index bc5f1b2..ebfdf33 100644
--- a/include/spaic/ComponentPart.hpp
+++ b/include/spaic/ComponentPart.hpp
@@ -10,7 +10,7 @@ using Update = std::function<ShouldRender()>;
 using Render = std::function<spaic::vnode::VNode()>;
 
 template <typename Props, typename StateSet>
-Component<Props> create_component(Props props, StateSet state, Update update, Render render);
+Component<Props> create_component(Props &&props, StateSet &&state, const Update &update, const Render &render);
 } // namespace spaic::comp
 
 #include <spaic/detail/ComponentPart.hpp>
\ No newline at end of file
diff --git a/include/spaic/detail/Component.hpp b/include/spaic/detail/Component.hpp
index 110f47c..41b98e2 100644
--- a/include/spaic/detail/Component.hpp
+++ b/include/spaic/detail/Component.hpp
@@ -9,21 +9,20 @@
 namespace spaic::comp
 {
 template <typename... T>
-ComponentParent ComponentSingle::operator()(T... children) noexcept
+ComponentParent ComponentSingle::operator()(T&&... children) noexcept
 {
     // TODO: ComponentSingle::operator()(children)
-    return ComponentParent(this->native_node_name, {children...});
+    return ComponentParent(native_node_name, { std::forward<T>(children)... });
 }
 
 template <typename Props>
-Component<Props>::Component(NativeNodeName native_node_name) : native_node_name(native_node_name)
-{
-}
+Component<Props>::Component(NativeNodeName native_node_name) : native_node_name(native_node_name) {}
+
 template <typename Props>
 template <typename... T>
-ComponentSingle Component<Props>::operator()(T... args) noexcept
+ComponentSingle Component<Props>::operator()(T&&... args) noexcept
 {
     // TODO: Component::operator()(args)
-    return ComponentSingle(this->native_node_name);
+    return ComponentSingle(native_node_name);
 }
 } // namespace spaic::comp
diff --git a/include/spaic/detail/ComponentPart.hpp b/include/spaic/detail/ComponentPart.hpp
index 589c465..2575f9b 100644
--- a/include/spaic/detail/ComponentPart.hpp
+++ b/include/spaic/detail/ComponentPart.hpp
@@ -11,7 +11,7 @@
 namespace spaic::comp
 {
 template <typename Props, typename StateSet>
-Component<Props> create_component(Props props, StateSet state, Update update, Render render)
+Component<Props> create_component(Props &&props, StateSet &&state, const Update &update, const Render &render)
 {
     // TODO: create_component(props, state, update, render)
     return Component<Props>(std::nullopt);
diff --git a/include/spaic/detail/Property.hpp b/include/spaic/detail/Property.hpp
index ffea73b..75a46dd 100644
--- a/include/spaic/detail/Property.hpp
+++ b/include/spaic/detail/Property.hpp
@@ -58,6 +58,6 @@ Property<T, std::optional<T>> optional() noexcept
 template <typename T>
 Property<T, T> fallback(T &&fallback_value) noexcept
 {
-    return Fallback<T>(fallback_value);
+    return Fallback<T>(std::forward<T>(fallback_value));
 }
 } // namespace spaic::props
diff --git a/src/spaic-dom/Render.cpp b/src/spaic-dom/Render.cpp
index e379666..d5d330f 100644
--- a/src/spaic-dom/Render.cpp
+++ b/src/spaic-dom/Render.cpp
@@ -8,26 +8,25 @@
 
 namespace spaic::dom
 {
-
 template <class... Ts>
 struct overloaded : Ts...
 {
     using Ts::operator()...;
 };
 template <class... Ts>
-overloaded(Ts...)->overloaded<Ts...>;
+overloaded(Ts...) -> overloaded<Ts...>;
 
-std::string render_base(spaic::vnode::VNodeBase node)
+std::string render_base(const spaic::vnode::VNodeBase &node)
 {
     std::ostringstream stream;
     std::visit(
         overloaded{
-            [&](std::nullptr_t &arg) {
+            [&](std::nullptr_t) {
                 // do nothing, nullptr means empty string.
             },
-            [&](std::string &arg) { stream << arg; },
-            [&](const char *&arg) { stream << arg; },
-            [&](spaic::comp::ComponentParent &arg) {
+            [&](const std::string &arg) { stream << arg; },
+            [&](const char *arg) { stream << arg; },
+            [&](const spaic::comp::ComponentParent &arg) {
                 if (arg.native_node_name)
                 {
                     stream << "<" << *arg.native_node_name << ">\n";
@@ -41,8 +40,8 @@ std::string render_base(spaic::vnode::VNodeBase node)
                     stream << "</" << *arg.native_node_name << ">\n";
                 }
             },
-            [&](spaic::comp::ComponentSingle &arg) { stream << typeid(std::decay_t<decltype(arg)>).name() << "(ComponentSingle)"; },
-            [&](auto arg) {
+            [&](const spaic::comp::ComponentSingle &arg) { stream << typeid(std::decay_t<decltype(arg)>).name() << "(ComponentSingle)"; },
+            [&](const auto &arg) {
                 using T = std::decay_t<decltype(arg)>;
                 if constexpr (std::is_same_v<T, bool>)
                 {
@@ -61,11 +60,11 @@ std::string render_base(spaic::vnode::VNodeBase node)
         node);
     return stream.str();
 }
-std::string render(spaic::vnode::VNode node)
+std::string render(const spaic::vnode::VNode &node)
 {
     std::ostringstream stream;
     std::visit(
-        [&](auto &&arg) {
+        [&](const auto &arg) {
             // wtf is that fucking bitches
             using T = std::decay_t<decltype(arg)>;
             if constexpr (std::is_same_v<T, std::vector<spaic::vnode::VNode>>)
diff --git a/src/spaic/Component.cpp b/src/spaic/Component.cpp
index 732cb96..2e6b332 100644
--- a/src/spaic/Component.cpp
+++ b/src/spaic/Component.cpp
@@ -5,5 +5,5 @@ namespace spaic::comp
 {
 ComponentSingle::ComponentSingle(NativeNodeName native_node_name) : native_node_name(native_node_name) {}
 
-ComponentParent::ComponentParent(NativeNodeName native_node_name, std::vector<spaic::vnode::VNode> children) : native_node_name(native_node_name), children(children) {}
+ComponentParent::ComponentParent(NativeNodeName native_node_name, std::vector<spaic::vnode::VNode> &&children) : native_node_name(native_node_name), children(std::move(children)) {}
 } // namespace spaic::comp
\ No newline at end of file