diff --git a/_sass/_base.scss b/_sass/_base.scss
index 2f94c10..38a76f3 100644
--- a/_sass/_base.scss
+++ b/_sass/_base.scss
@@ -1,4 +1,8 @@
 @charset "UTF-8";
+html{
+    margin-left: calc(100vw - 100%);
+    margin-right: 0;
+}
 
 html, body {
   height: auto;
diff --git a/_sass/_header.scss b/_sass/_header.scss
index c1cdcb8..74248cb 100644
--- a/_sass/_header.scss
+++ b/_sass/_header.scss
@@ -3,7 +3,7 @@
     background-color: #fff;
     opacity: 0.95;
     position:fixed;
-    left:0px;
+    left:calc((100vw - 100%)/2);
     top:0px;
     width:100%;
     z-index: 50;