diff --git a/style.css b/style.css
index 0330745..0173801 100644
--- a/style.css
+++ b/style.css
@@ -204,7 +204,7 @@ button::-moz-focus-inner {
 .title-bar-controls button[aria-label="Minimize"] {
   background-image: svg-load("./icon/minimize.svg");
   background-repeat: no-repeat;
-  background-position: bottom 3px left 3px;
+  background-position: bottom 3px left 4px;
 }
 
 .title-bar-controls button[aria-label="Maximize"] {
@@ -513,7 +513,7 @@ ul.tree-view details > summary:before {
   text-align: center;
   display: block;
   float: left;
-  content: '+';
+  content: "+";
   border: 1px solid #808080;
   width: 8px;
   height: 9px;
@@ -524,7 +524,7 @@ ul.tree-view details > summary:before {
 }
 
 ul.tree-view details[open] > summary:before {
-  content: '-'
+  content: "-";
 }
 
 pre {