fix: right margin not blurred in firefox

assets/css/compiled/main.css

@@ -3680,9 +3680,7 @@ pre {
   background-repeat: no-repeat;
   background-size: cover;
   background-position: center;
-  width: calc(100% + 40px);
   z-index: -10;
-  margin-left: -20px;
 }
 .hero_gradient {
   width: 100%;

assets/css/main.css

@@ -431,9 +431,7 @@ pre {
   background-repeat: no-repeat;
   background-size: cover;
   background-position: center;
-  width: calc(100% + 40px);
   z-index: -10;
-  margin-left: -20px;
 }
 
 .hero_gradient {