diff --git a/index.html b/index.html
index b507568..adfc988 100644
--- a/index.html
+++ b/index.html
@@ -21,8 +21,8 @@ figcaption{font-size:14px;margin-top:4px}
 figcaption a{color:var(--mute);text-decoration:none;margin:0 4px}
 figcaption a:hover{color:var(--fg);text-decoration:underline}
 #bg{position:absolute;top:16px;right:16px;width:28px;height:28px;padding:0;border:2px solid var(--fg);border-radius:50%;background:linear-gradient(90deg,var(--fg) 50%,var(--bg) 50%);cursor:pointer}
-#gh{position:absolute;top:16px;left:16px;width:28px;height:28px;color:var(--fg)}
-#gh svg{display:block;width:100%;height:100%;fill:currentColor}
+#gh{position:absolute;top:0;left:0;width:34px;height:34px;display:flex;align-items:center;justify-content:center;background:var(--fg);color:var(--bg)}
+#gh svg{width:20px;height:20px;fill:currentColor}
 img{width:100%;height:100%;object-fit:contain}
 hr{grid-column:1/-1;border:0;border-top:3px dashed var(--mute);margin:24px 0}
 @media(max-width:480px){main{grid-template-columns:repeat(3,1fr);gap:10px}}