diff --git a/core/static/core/footer.scss b/core/static/core/footer.scss
index aa2e048f..3c0306e0 100644
--- a/core/static/core/footer.scss
+++ b/core/static/core/footer.scss
@@ -65,7 +65,7 @@ footer.bottom-links {
       flex-wrap: wrap;
       align-items: center;
       background-color: $primary-neutral-dark-color;
-      box-shadow: $shadow-color 0 0 15px;
+      box-shadow: black 0 8px 15px;
 
       a {
         color: $white-color;
diff --git a/core/static/core/header.scss b/core/static/core/header.scss
index 7eca52f9..f43819c3 100644
--- a/core/static/core/header.scss
+++ b/core/static/core/header.scss
@@ -11,7 +11,8 @@ $hovered-red-text-color: #ff4d4d;
 .header {
   box-sizing: border-box;
   background-color: $deepblue;
-  box-shadow: 3px 3px 3px 0 #dfdfdf;
+  box-shadow: black 0 1px 3px 0,
+              black 0 4px 8px 3px;
   border-radius: 0;
   width: 100%;
   display: flex;
@@ -99,7 +100,7 @@ $hovered-red-text-color: #ff4d4d;
         border-radius: 0;
         margin: 0;
         box-sizing: border-box;
-        background-color: $deepblue;
+        background-color: transparent;
         width: 45px;
         height: 25px;
         padding: 0;
@@ -331,7 +332,7 @@ $hovered-red-text-color: #ff4d4d;
           padding: 10px;
           z-index: 100;
           border-radius: 10px;
-          box-shadow: 3px 3px 3px 0 #767676;
+          @include shadow;
 
           >ul {
             list-style-type: none;
diff --git a/core/static/core/img/gala25_background.webp b/core/static/core/img/gala25_background.webp
new file mode 100644
index 00000000..978e9946
Binary files /dev/null and b/core/static/core/img/gala25_background.webp differ
diff --git a/core/static/core/img/gala25_logo.webp b/core/static/core/img/gala25_logo.webp
new file mode 100644
index 00000000..3cbdb6f7
Binary files /dev/null and b/core/static/core/img/gala25_logo.webp differ
diff --git a/core/static/core/style.scss b/core/static/core/style.scss
index 7522666b..c23303a7 100644
--- a/core/static/core/style.scss
+++ b/core/static/core/style.scss
@@ -271,8 +271,9 @@ body {
 
   /*--------------------------------CONTENT------------------------------*/
   #content {
-    padding: 1em 1%;
-    box-shadow: $shadow-color 0 5px 10px;
+    padding: 1.5em 2%;
+    border-radius: 5px;
+    box-shadow: black 0 8px 15px;
     background: $white-color;
     overflow: auto;
   }
diff --git a/core/templates/core/base.jinja b/core/templates/core/base.jinja
index 2be6cd54..08b5766b 100644
--- a/core/templates/core/base.jinja
+++ b/core/templates/core/base.jinja
@@ -34,6 +34,18 @@
 
       {% block additional_css %}{% endblock %}
       {% block additional_js %}{% endblock %}
+      <style>
+        {# background image must be declared here, because the static names are
+           changed during the static collection step,
+           which means we must gather them with the `static` template function #}
+        .header {
+          background-image: url("{{ static("core/img/gala25_background.webp") }}");
+          background-position-y: 80%;  {# There are more stars in this part of the picture #}
+        }
+        body {
+          background-image: url("{{ static("core/img/gala25_background.webp") }}");
+        }
+      </style>
     {% endblock %}
   </head>
 
diff --git a/core/templates/core/base/header.jinja b/core/templates/core/base/header.jinja
index cb47a47c..65a15968 100644
--- a/core/templates/core/base/header.jinja
+++ b/core/templates/core/base/header.jinja
@@ -1,6 +1,6 @@
 <header class="header">
   <div class="header-logo">
-    <a class="header-logo-picture" href="{{ url('core:index') }}" style="background-image: url('{{ static('core/img/logo_no_text.png') }}')">
+    <a class="header-logo-picture" href="{{ url('core:index') }}" style="background-image: url('{{ static("core/img/gala25_logo.webp") }}')">
       &nbsp;
     </a>
     <a class="header-logo-text" href="{{ url('core:index') }}">