web: css adjustments

tailwind classes define what "page-container" previously did, with some
changes. Logout button moved to top of screen.

html/form.html

@@ -35,7 +35,7 @@
             </div>
         </div>
         {{ template "account-linking.html" . }}
-        <div class="top-[2%] lg:top-4 left-[2%] lg:left-4  absolute">
+        <div class="top-2 left-2 absolute">
             <span class="dropdown" tabindex="0" id="lang-dropdown">
                 <span class="button ~urge dropdown-button">
                     <i class="ri-global-line"></i>
@@ -48,7 +48,7 @@
             </span>
         </div>
         <div id="notification-box"></div>
-        <div class="page-container">
+        <div class="page-container m-2 lg:my-20 lg:mx-64">
             <div class="card dark:~d_neutral @low">
                 <div class="flex flex-col md:flex-row gap-3 items-baseline mb-2">
                     <span class="heading mr-5">