diff --git a/succbone/succd/index.html b/succbone/succd/index.html
index 6be0c1d..921cc87 100644
--- a/succbone/succd/index.html
+++ b/succbone/succd/index.html
@@ -53,11 +53,14 @@ td > span {
 }
 
 .main-grid {
-    margin: 2em;
+    margin-top: 2em;
+    margin-left: auto;
+    margin-right: auto;
+    max-width: 130em;
     clear: both;
 
     display: grid;
-    grid-template-columns: repeat(auto-fit, minmax(50em, 1fr));
+    grid-template-columns: repeat(auto-fit, minmax(54em, 1fr));
     column-gap: 2em;
     row-gap: 2em;
 }
@@ -170,7 +173,7 @@ let historicalDraw = (w, h) => {
     // coordinate calculation.
 
     canvas.clearRect(0, 0, w, h);
-    canvas.fillStyle = "#f0f0f0";
+    canvas.fillStyle = "#e8e8e8";
     canvas.fillRect(0, 0, w, h);
 
     // Margins of the main graph window.