diff --git a/CHANGELOG.md b/CHANGELOG.md
index 04e0c48d..db2e5f6a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.7.1
+### Bug fixes
+- Fix sidebar style in mobile browser.
+
 ## 1.7.0
 
 ### Bug fixes
diff --git a/src/themes/basic/_layout.css b/src/themes/basic/_layout.css
index e14a1d16..1ee467ad 100644
--- a/src/themes/basic/_layout.css
+++ b/src/themes/basic/_layout.css
@@ -193,7 +193,7 @@ main {
   &::after {
     content: '';
     position: inherit;
-    left: $sidebar-width;
+    left: calc($sidebar-width - 1px);
     top: 0;
     height: 100vh;
     border-right: 1px solid rgba(0, 0, 0, .07);
@@ -367,6 +367,15 @@ body.close {
     position: fixed;
   }
 
+  .sidebar {
+    margin-bottom: 0;
+    border-right: 1px solid rgba(0, 0, 0, .07);
+
+    &::after {
+      content: none;
+    }
+  }
+
   nav {
     margin-top: 16px;
   }