diff --git a/frontend/index.html b/frontend/index.html
index 48fd941..c730454 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -48,20 +48,20 @@
 			<div id="c-apdu-sub-sim">
 		<div id="chain-sim-rows"></div>
 		<div class="flex flex-wrap gap-1 mb-3">
-			<button onclick="chainAddRow('chain-sim','select')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ SELECT</button>
-			<button onclick="chainAddRow('chain-sim','read-record')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ READ RECORD</button>
-			<button onclick="chainAddRow('chain-sim','read-binary')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ READ BINARY</button>
-			<button onclick="chainAddRow('chain-sim','update-record')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ UPDATE RECORD</button>
-			<button onclick="chainAddRow('chain-sim','update-binary')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ UPDATE BINARY</button>
-			<button onclick="chainAddRow('chain-sim','erase-binary')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ ERASE BINARY</button>
-			<button onclick="chainAddRow('chain-sim','activate-file')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ ACTIVATE</button>
-			<button onclick="chainAddRow('chain-sim','deactivate-file')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ DEACTIVATE</button>
-			<button onclick="chainAddRow('chain-sim','verify')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ VERIFY PIN</button>
-			<button onclick="chainAddRow('chain-sim','change')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ CHANGE PIN</button>
-			<button onclick="chainAddRow('chain-sim','disable')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ DISABLE PIN</button>
-			<button onclick="chainAddRow('chain-sim','enable')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ ENABLE PIN</button>
-			<button onclick="chainAddRow('chain-sim','unblock')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ UNBLOCK PIN</button>
-			<button onclick="chainAddRow('chain-sim','get-response')" class="px-2 py-1 text-xs bg-gray-200 dark:bg-gray-700 text-gray-600 dark:text-gray-400 rounded hover:bg-gray-300 dark:hover:bg-gray-600">+ GET RESPONSE</button>
+			<button onclick="chainAddRow('chain-sim','select')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ SELECT</button>
+			<button onclick="chainAddRow('chain-sim','read-record')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ READ RECORD</button>
+			<button onclick="chainAddRow('chain-sim','read-binary')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ READ BINARY</button>
+			<button onclick="chainAddRow('chain-sim','update-record')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ UPDATE RECORD</button>
+			<button onclick="chainAddRow('chain-sim','update-binary')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ UPDATE BINARY</button>
+			<button onclick="chainAddRow('chain-sim','erase-binary')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ ERASE BINARY</button>
+			<button onclick="chainAddRow('chain-sim','activate-file')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ ACTIVATE</button>
+			<button onclick="chainAddRow('chain-sim','deactivate-file')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ DEACTIVATE</button>
+			<button onclick="chainAddRow('chain-sim','verify')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ VERIFY PIN</button>
+			<button onclick="chainAddRow('chain-sim','change')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ CHANGE PIN</button>
+			<button onclick="chainAddRow('chain-sim','disable')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ DISABLE PIN</button>
+			<button onclick="chainAddRow('chain-sim','enable')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ ENABLE PIN</button>
+			<button onclick="chainAddRow('chain-sim','unblock')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ UNBLOCK PIN</button>
+			<button onclick="chainAddRow('chain-sim','get-response')" class="text-xs px-2 py-1 bg-emerald-600 text-white rounded hover:bg-emerald-700">+ GET RESPONSE</button>
 		</div>
 		<textarea id="chain-sim-preview" rows="3" readonly class="w-full font-mono border border-gray-300 dark:border-slate-600 text-sm rounded px-3 py-1.5 bg-gray-100 dark:bg-slate-800" placeholder="Chain preview — add commands above"></textarea>
 		<button onclick="packToSp('chain-sim-preview')" id="chain-sim-pack-btn" disabled class="mb-3 px-5 py-2.5 bg-emerald-600 text-white text-sm font-medium rounded hover:bg-emerald-700 disabled:opacity-40 disabled:cursor-not-allowed" data-l10n="Pack into Secured packet">Pack into Secured packet</button>
@@ -70,19 +70,19 @@
 	<div id="c-apdu-sub-usim" class="hidden">
 		<div id="chain-usim-rows"></div>
 		<div class="flex flex-wrap gap-1 mb-3">
-			<button onclick="chainAddRow('chain-usim','select')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ SELECT</button>
-			<button onclick="chainAddRow('chain-usim','read-record')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ READ RECORD</button>
-			<button onclick="chainAddRow('chain-usim','read-binary')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ READ BINARY</button>
-			<button onclick="chainAddRow('chain-usim','update-record')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ UPDATE RECORD</button>
-			<button onclick="chainAddRow('chain-usim','update-binary')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ UPDATE BINARY</button>
-			<button onclick="chainAddRow('chain-usim','activate-file')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ ACTIVATE</button>
-			<button onclick="chainAddRow('chain-usim','deactivate-file')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ DEACTIVATE</button>
-			<button onclick="chainAddRow('chain-usim','verify')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ VERIFY PIN</button>
-			<button onclick="chainAddRow('chain-usim','change')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ CHANGE PIN</button>
-			<button onclick="chainAddRow('chain-usim','disable')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ DISABLE PIN</button>
-			<button onclick="chainAddRow('chain-usim','enable')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ ENABLE PIN</button>
-			<button onclick="chainAddRow('chain-usim','unblock')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ UNBLOCK PIN</button>
-			<button onclick="chainAddRow('chain-usim','get-response')" class="px-2 py-1 text-xs bg-gray-200 dark:bg-gray-700 text-gray-600 dark:text-gray-400 rounded hover:bg-gray-300 dark:hover:bg-gray-600">+ GET RESPONSE</button>
+			<button onclick="chainAddRow('chain-usim','select')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ SELECT</button>
+			<button onclick="chainAddRow('chain-usim','read-record')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ READ RECORD</button>
+			<button onclick="chainAddRow('chain-usim','read-binary')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ READ BINARY</button>
+			<button onclick="chainAddRow('chain-usim','update-record')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ UPDATE RECORD</button>
+			<button onclick="chainAddRow('chain-usim','update-binary')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ UPDATE BINARY</button>
+			<button onclick="chainAddRow('chain-usim','activate-file')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ ACTIVATE</button>
+			<button onclick="chainAddRow('chain-usim','deactivate-file')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ DEACTIVATE</button>
+			<button onclick="chainAddRow('chain-usim','verify')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ VERIFY PIN</button>
+			<button onclick="chainAddRow('chain-usim','change')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ CHANGE PIN</button>
+			<button onclick="chainAddRow('chain-usim','disable')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ DISABLE PIN</button>
+			<button onclick="chainAddRow('chain-usim','enable')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ ENABLE PIN</button>
+			<button onclick="chainAddRow('chain-usim','unblock')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ UNBLOCK PIN</button>
+			<button onclick="chainAddRow('chain-usim','get-response')" class="text-xs px-2 py-1 bg-emerald-600 text-white rounded hover:bg-emerald-700">+ GET RESPONSE</button>
 		</div>
 		<textarea id="chain-usim-preview" rows="3" readonly class="w-full font-mono border border-gray-300 dark:border-slate-600 text-sm rounded px-3 py-1.5 bg-gray-100 dark:bg-slate-800" placeholder="Chain preview — add commands above"></textarea>
 		<button onclick="packToSp('chain-usim-preview')" id="chain-usim-pack-btn" disabled class="mb-3 px-5 py-2.5 bg-emerald-600 text-white text-sm font-medium rounded hover:bg-emerald-700 disabled:opacity-40 disabled:cursor-not-allowed" data-l10n="Pack into Secured packet">Pack into Secured packet</button>
@@ -116,20 +116,20 @@
 	<div id="c-apdu-sub-ram" class="hidden">
 		<div id="chain-ram-rows"></div>
 		<div class="flex flex-wrap gap-1 mb-3">
-			<button onclick="chainAddRow('chain-ram','install-load')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ INSTALL [for load]</button>
-			<button onclick="chainAddRow('chain-ram','install-install')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ INSTALL [for install]</button>
-			<button onclick="chainAddRow('chain-ram','install-make-sel')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ INSTALL [for make selectable]</button>
-			<button onclick="chainAddRow('chain-ram','install-reg-update')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ INSTALL [for registry update]</button>
-			<button onclick="chainAddRow('chain-ram','install-extradition')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ INSTALL [for extradition]</button>
-			<button onclick="chainAddRow('chain-ram','load')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ LOAD</button>
-			<button onclick="chainAddRow('chain-ram','delete')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ DELETE</button>
-			<button onclick="chainAddRow('chain-ram','get-status')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ GET STATUS</button>
-			<button onclick="chainAddRow('chain-ram','get-data')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ GET DATA</button>
-			<button onclick="chainAddRow('chain-ram','store-data')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ STORE DATA</button>
-			<button onclick="chainAddRow('chain-ram','set-status')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ SET STATUS</button>
-			<button onclick="chainAddRow('chain-ram','ext-auth')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ EXTERNAL AUTH</button>
-			<button onclick="chainAddRow('chain-ram','int-auth')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ INTERNAL AUTH</button>
-			<button onclick="chainAddRow('chain-ram','get-response')" class="px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900 text-blue-700 dark:text-blue-300 rounded hover:bg-blue-200 dark:hover:bg-blue-800">+ GET RESPONSE</button>
+			<button onclick="chainAddRow('chain-ram','install-load')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ INSTALL [for load]</button>
+			<button onclick="chainAddRow('chain-ram','install-install')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ INSTALL [for install]</button>
+			<button onclick="chainAddRow('chain-ram','install-make-sel')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ INSTALL [for make selectable]</button>
+			<button onclick="chainAddRow('chain-ram','install-reg-update')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ INSTALL [for registry update]</button>
+			<button onclick="chainAddRow('chain-ram','install-extradition')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ INSTALL [for extradition]</button>
+			<button onclick="chainAddRow('chain-ram','load')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ LOAD</button>
+			<button onclick="chainAddRow('chain-ram','delete')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ DELETE</button>
+			<button onclick="chainAddRow('chain-ram','get-status')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ GET STATUS</button>
+			<button onclick="chainAddRow('chain-ram','get-data')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ GET DATA</button>
+			<button onclick="chainAddRow('chain-ram','store-data')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ STORE DATA</button>
+			<button onclick="chainAddRow('chain-ram','set-status')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ SET STATUS</button>
+			<button onclick="chainAddRow('chain-ram','ext-auth')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ EXTERNAL AUTH</button>
+			<button onclick="chainAddRow('chain-ram','int-auth')" class="text-xs px-2 py-1 bg-blue-600 text-white rounded hover:bg-blue-700">+ INTERNAL AUTH</button>
+			<button onclick="chainAddRow('chain-ram','get-response')" class="text-xs px-2 py-1 bg-emerald-600 text-white rounded hover:bg-emerald-700">+ GET RESPONSE</button>
 		</div>
 		<textarea id="chain-ram-preview" rows="3" readonly class="w-full font-mono border border-gray-300 dark:border-slate-600 text-sm rounded px-3 py-1.5 bg-gray-100 dark:bg-slate-800" placeholder="Chain preview — add commands above"></textarea>
 		<button onclick="packToSp('chain-ram-preview')" id="chain-ram-pack-btn" disabled class="mb-3 px-5 py-2.5 bg-emerald-600 text-white text-sm font-medium rounded hover:bg-emerald-700 disabled:opacity-40 disabled:cursor-not-allowed" data-l10n="Pack into Secured packet">Pack into Secured packet</button>
diff --git a/frontend/sw.js b/frontend/sw.js
index 668c43b..438465e 100644
--- a/frontend/sw.js
+++ b/frontend/sw.js
@@ -1,4 +1,4 @@
-const CACHE = 'otaman-v47';
+const CACHE = 'otaman-v48';
 const URLS = [
   'index.html',
   'help.html',