Fixed pinned tabs and welcome page

src/browser/components/zen-welcome/welcome.css

@@ -36,10 +36,9 @@ button {
 }
 
 .page-split:not([hidden="true"]) {
-  display: flex;
-  margin: 12%;
   flex-direction: row;
-  justify-content: space-between;
+  margin: auto;
+  justify-content: space-around;
 }
 
 #enableFeatures .card {
@@ -62,7 +61,6 @@ button {
   align-items: stretch;
   gap: 8px;
   margin-bottom: 8px;
-  justify-content: center;
 }
 
 .cardGroup .card {
@@ -92,6 +90,12 @@ h1 {
   line-height: 1;
 }
 
+.page > div:nth-child(2) h1 {
+  margin-bottom: 15px;
+  margin-top: 10px;
+  font-size: 18px;
+}
+
 p {
   font-size: 16px;
   opacity: 0.8;

src/browser/locales/en-US/browser/zen-welcome.ftl

@@ -16,8 +16,8 @@ welcome-dialog-theme = 🎨 Choose a theme
 welcome-dialog-theme-subtext = Personalize your experience with your favorite look!
 welcome-dialog-theme-action = Continue
 
-welcome-dialog-theme-header-1 = 1. Choose A theme
-welcome-dialog-theme-header-2 = 2. Find Your Perfect Color
+welcome-dialog-theme-header-1 = 1. Choose a theme
+welcome-dialog-theme-header-2 = 2. Find your perfect color
 
 welcome-dialog-search = 🔍 Choose a search engine
 welcome-dialog-search-subtext = Select your preferred search engine to tailor your browsing experience!

src/browser/themes/shared/zen-browser-shared.css

@@ -330,8 +330,11 @@ toolbarbutton#scrollbutton-up {
   display: none;
 }
 
-.tabbrowser-tab[pinned]:last-of-type {
- /** Todo: add a separator */
+@media (-moz-bool-pref: "zen.tabs.vertical") { 
+  .tabbrowser-tab[pinned] {
+    /* Add a gap between the last pinned tab and the first visible tab */
+    margin-inline-start: 12px !important;
+  }
 }
 
 .tabbrowser-tab:is([multiselected="true"], [selected]) {