diff --git a/src/registrar/assets/sass/_theme/_base.scss b/src/registrar/assets/sass/_theme/_base.scss
index b8bacae80..cfcfc46d0 100644
--- a/src/registrar/assets/sass/_theme/_base.scss
+++ b/src/registrar/assets/sass/_theme/_base.scss
@@ -1,6 +1,10 @@
 @use "uswds-core" as *;
 @use "cisa_colors" as *;
 
+:root {
+  --widescreen-max-width: 1920px;
+}
+
 /* Styles for making visible to screen reader / AT users only. */
 .sr-only {
   @include sr-only;
@@ -201,8 +205,9 @@ abbr[title] {
 }
 
 .usa-banner__inner--widescreen  {
-  max-width: 1920px;
+  max-width: var(--widescreen-max-width);
 }
+
 .margin-right-neg-4px {
   margin-right: -4px;
 }
diff --git a/src/registrar/assets/sass/_theme/_containers.scss b/src/registrar/assets/sass/_theme/_containers.scss
index 43d5dba08..2b0330b30 100644
--- a/src/registrar/assets/sass/_theme/_containers.scss
+++ b/src/registrar/assets/sass/_theme/_containers.scss
@@ -2,5 +2,5 @@
 
 .grid-container--widescreen,
 .usa-identifier__container--widescreen {
-    max-width: 1920px !important;
+    max-width: var(--widescreen-max-width) !important;
 }
diff --git a/src/registrar/assets/sass/_theme/_header.scss b/src/registrar/assets/sass/_theme/_header.scss
index 3d72a09cf..abc01a55c 100644
--- a/src/registrar/assets/sass/_theme/_header.scss
+++ b/src/registrar/assets/sass/_theme/_header.scss
@@ -119,3 +119,8 @@
         }
     }
 }
+
+.usa-nav__inner--widescreen,
+.usa-navbar--widescreen  {
+    max-width: var(--widescreen-max-width) !important;
+}
diff --git a/src/registrar/assets/sass/_theme/_navigation.scss b/src/registrar/assets/sass/_theme/_navigation.scss
index 82e58b20f..8d684e1f2 100644
--- a/src/registrar/assets/sass/_theme/_navigation.scss
+++ b/src/registrar/assets/sass/_theme/_navigation.scss
@@ -2,5 +2,5 @@
 
 .usa-nav__inner--widescreen,
 .usa-navbar--widescreen  {
-    max-width: 1920px !important;
+    max-width: var(--widescreen-max-width) !important;
 }
\ No newline at end of file
diff --git a/src/registrar/assets/sass/_theme/styles.scss b/src/registrar/assets/sass/_theme/styles.scss
index cda5c0ad6..8c38ae0b4 100644
--- a/src/registrar/assets/sass/_theme/styles.scss
+++ b/src/registrar/assets/sass/_theme/styles.scss
@@ -24,7 +24,6 @@
 @forward "header";
 @forward "register-form";
 @forward "containers";
-@forward "navigation";
 
 /*--------------------------------------------------
 --- Admin ---------------------------------*/
diff --git a/src/registrar/templates/portfolio_base.html b/src/registrar/templates/portfolio_base.html
index ac5bb0a20..054118468 100644
--- a/src/registrar/templates/portfolio_base.html
+++ b/src/registrar/templates/portfolio_base.html
@@ -4,7 +4,7 @@
   <div id="wrapper" class="{% block wrapper_class %}dashboard--portfolio{% endblock %}">
     {% block content %}
         
-        <main id="main-content" class="grid-container {% if is_widescreen_mode %} grid-container--widescreen {% endif %}">
+        <main class="grid-container {% if is_widescreen_mode %} grid-container--widescreen {% endif %}">
             {% if user.is_authenticated %}
             {# the entire logged in page goes here #}