diff --git a/res/layouts/pages/content.xml.lua b/res/layouts/pages/content.xml.lua
index c0edf7f9..5cab6efd 100644
--- a/res/layouts/pages/content.xml.lua
+++ b/res/layouts/pages/content.xml.lua
@@ -44,11 +44,15 @@ function place_pack(panel, packid, packinfo, callback)
     packinfo.id_verbose = packid
     packinfo.callback = callback
     panel:add(gui.template("pack", packinfo))
+    if callback == "" then
+        document["pack_"..packinfo.id].enabled = false
+    end
 end
 
 function refresh()
     packs_installed = pack.get_installed()
     packs_available = pack.get_available()
+    packs_all = {unpack(packs_installed), unpack(packs_available)}
     
     local packs_cur = document.packs_cur
     local packs_add = document.packs_add
@@ -67,7 +71,19 @@ function refresh()
     for i,id in ipairs(packs_available) do
         local packinfo = pack.get_info(id)
         packinfo.index = i
+        packinfo.missing = ""
         callback = string.format('move_pack("%s")', id)
+        if packinfo.dependencies then
+            for j,dep in ipairs(packinfo.dependencies) do
+                local depid = dep:sub(2,-1)
+                if dep:sub(1,1) == '!' and not table.has(packs_all, depid) then
+                    packinfo.missing = depid
+                    packinfo.description = ""
+                    callback = ''
+                end
+            end
+        end
+        
         place_pack(packs_add, id, packinfo, callback)
     end
 
diff --git a/res/layouts/templates/pack.xml b/res/layouts/templates/pack.xml
index ae637cc0..6117a5e5 100644
--- a/res/layouts/templates/pack.xml
+++ b/res/layouts/templates/pack.xml
@@ -7,6 +7,7 @@
            gravity='bottom-right'>
         %{creator}
     </label>
+    <label if='%{missing}' pos='80,28' color='#FF4040'>missing '%{missing}'</label>
     <label pos='80,28' color='#FFFFFFB2'>
         %{description}
     </label>
diff --git a/src/graphics/ui/elements/Button.cpp b/src/graphics/ui/elements/Button.cpp
index 579bb56f..ef4c6195 100644
--- a/src/graphics/ui/elements/Button.cpp
+++ b/src/graphics/ui/elements/Button.cpp
@@ -79,7 +79,7 @@ void Button::drawBackground(const DrawContext* pctx, Assets* assets) {
     glm::vec2 pos = calcPos();
     auto batch = pctx->getBatch2D();
     batch->texture(nullptr);
-    if (enabled) {
+    if (isEnabled()) {
         batch->setColor(isPressed() ? pressedColor : (hover ? hoverColor : color));
     } else {
         batch->setColor({color.r, color.g, color.b, color.a * 0.5f});
diff --git a/src/graphics/ui/elements/Container.cpp b/src/graphics/ui/elements/Container.cpp
index 93dead99..52969bea 100644
--- a/src/graphics/ui/elements/Container.cpp
+++ b/src/graphics/ui/elements/Container.cpp
@@ -11,7 +11,7 @@ Container::Container(glm::vec2 size) : UINode(size) {
 }
 
 std::shared_ptr<UINode> Container::getAt(glm::vec2 pos, std::shared_ptr<UINode> self) {
-    if (!interactive || !enabled) {
+    if (!interactive || !isEnabled()) {
         return nullptr;
     }
     if (!isInside(pos)) return nullptr;
@@ -92,7 +92,12 @@ void Container::draw(const DrawContext* pctx, Assets* assets) {
 }
 
 void Container::drawBackground(const DrawContext* pctx, Assets* assets) {
-    glm::vec4 color = isPressed() ? pressedColor : (hover ? hoverColor : this->color);
+    glm::vec4 color = this->color;
+    if (isEnabled()) {
+        color = (isPressed() ? pressedColor : (hover ? hoverColor : color));
+    } else {
+        color = glm::vec4(color.r, color.g, color.b, color.a * 0.5f);
+    }
     if (color.a <= 0.001f)
         return;
     glm::vec2 pos = calcPos();
diff --git a/src/graphics/ui/elements/Image.cpp b/src/graphics/ui/elements/Image.cpp
index 0b2d4945..d2d2aee1 100644
--- a/src/graphics/ui/elements/Image.cpp
+++ b/src/graphics/ui/elements/Image.cpp
@@ -22,7 +22,7 @@ void Image::draw(const DrawContext* pctx, Assets* assets) {
         setSize(glm::vec2(texture->getWidth(), texture->getHeight()));
     }
     batch->texture(texture);
-    if (enabled) {
+    if (isEnabled()) {
         batch->setColor(isPressed() ? pressedColor : (hover ? hoverColor : color));
     } else {
         batch->setColor({color.r, color.g, color.b, color.a * 0.5f});
diff --git a/src/graphics/ui/elements/Label.cpp b/src/graphics/ui/elements/Label.cpp
index 6c285ece..13f61725 100644
--- a/src/graphics/ui/elements/Label.cpp
+++ b/src/graphics/ui/elements/Label.cpp
@@ -149,7 +149,11 @@ void Label::draw(const DrawContext* pctx, Assets* assets) {
         cache.update(text, multiline, textWrap);
     }
 
-    batch->setColor(getColor());
+    if (isEnabled()) {
+        batch->setColor(isPressed() ? pressedColor : (hover ? hoverColor : color));
+    } else {
+        batch->setColor({color.r, color.g, color.b, color.a * 0.5f});
+    }
 
     uint lineHeight = font->getLineHeight();
     if (cache.lines.size() > 1) {
diff --git a/src/graphics/ui/elements/UINode.cpp b/src/graphics/ui/elements/UINode.cpp
index cd85e265..b05fb4ed 100644
--- a/src/graphics/ui/elements/UINode.cpp
+++ b/src/graphics/ui/elements/UINode.cpp
@@ -29,6 +29,9 @@ void UINode::setEnabled(bool flag) {
 }
 
 bool UINode::isEnabled() const {
+    if (enabled && parent) {
+        return parent->isEnabled();
+    }
     return enabled;
 }
 
diff --git a/src/graphics/ui/elements/UINode.hpp b/src/graphics/ui/elements/UINode.hpp
index 236b968d..fd269c89 100644
--- a/src/graphics/ui/elements/UINode.hpp
+++ b/src/graphics/ui/elements/UINode.hpp
@@ -47,6 +47,8 @@ namespace gui {
     class UINode {
         /// @brief element identifier used for direct access in UiDocument
         std::string id = "";
+        /// @brief element enabled state
+        bool enabled = true;
     protected:
         /// @brief element position within the parent element
         glm::vec2 pos {0.0f};
@@ -62,8 +64,6 @@ namespace gui {
         glm::vec4 pressedColor {1.0f};
         /// @brief element margin (only supported for Panel sub-nodes)
         glm::vec4 margin {1.0f};
-        /// @brief element enabled state
-        bool enabled = true;
         /// @brief is element visible
         bool visible = true;
         /// @brief is mouse over the element