Add Josh Comeau's CSS reset and fix body width.

themes/wikidarity/assets/css/main.css

@@ -1,23 +1,77 @@
+/*
+  Josh's Custom CSS Reset
+  https://www.joshwcomeau.com/css/custom-css-reset/
+*/
+
+*, *::before, *::after {
+  box-sizing: border-box;
+}
+
+* {
+  margin: 0;
+}
+
+body {
+  line-height: 1.5;
+  -webkit-font-smoothing: antialiased;
+}
+
+img, picture, video, canvas, svg {
+  :root {
+    /* Consider dark mode implementation later */
+    color-scheme: light;
+  }
+  display: block;
+  max-width: 100%;
+}
+
+input, button, textarea, select {
+  font: inherit;
+}
+
+p, h1, h2, h3, h4, h5, h6 {
+  overflow-wrap: break-word;
+}
+
+p {
+  text-wrap: pretty;
+}
+h1, h2, h3, h4, h5, h6 {
+  text-wrap: balance;
+}
+
+#root, #__next {
+  isolation: isolate;
+}
+
+/* Custom CSS for the Wikidarity theme */
+
 :root {
   /* Consider dark mode implementation later */
   color-scheme: light;
 }
 
+html {
+  display: flex;
+  justify-content: center;
+}
+
 body {
   color: oklch(0.145 0 0);
-  line-height: 1.5;
   font-family: "RecVar", Helvetica, Arial, sans-serif;
   max-width: 64rem;
+  width: 100%;
+  min-height: 100vh;
   padding: 2rem;
   background-color: oklch(0.97 0 0);
   transition: background-color 0.2s ease;
   display: flex;
   flex-direction: column;
-  gap: 2rem; /* gap replaces margin between sections */
+  gap: 2rem;
 }
 
 h1, h2, h3, h4, h5, h6 {
-  padding-bottom: 0.5rem; /* padding replaces margin-bottom */
+  padding-bottom: 0.5rem;
 }
 
 h1 {
@@ -121,10 +175,9 @@ footer {
   padding-top: 1rem;
 }
 
-/* Responsive adjustments using padding */
 @media (max-width: 768px) {
   body {
     padding: 1rem;
-    gap: 1rem; /* Adjust gap accordingly */
+    gap: 1rem;
   }
 }