fix anchor position in small windows.

static/css/style.css

@@ -38,6 +38,13 @@ th, td {
     margin-right: auto;
 }
 
+a.anchor {
+    display: block;
+    position: relative;
+    visibility: hidden;
+    top: -60px;
+}
+
 @media (min-height: 750px) {
     #nav {
         position: fixed;
@@ -50,10 +57,7 @@ th, td {
     }
 
     a.anchor {
-        display: block;
-        position: relative;
         top: -175px;
-        visibility: hidden;
     }
 }