diff --git a/popup.css b/popup.css
deleted file mode 100644
index 92bd72d..0000000
--- a/popup.css
+++ /dev/null
@@ -1,63 +0,0 @@
-body {
-    /*font-family: 'Sugoe UI','Hiragino Kaku Gothic Pro', 'ヒラギノ角ゴ Pro W3', 'Meiryo', 'メイリオ', 'Osaka', 'MS PGothic', 'arial', 'helvetica', 'sans-serif';*/
-    text-align: left;
-    font-size: 13px;
-    height: auto;
-    width: 300px;
-    padding: 5px 20px 0px;
-    overflow: hidden;
-}
-
-#main {
-    margin: 10px 0px;
-}
-
-hr {
-    size: 1;
-    color: #eee;
-}
-
-p {}
-
-textarea {
-    font: inherit;
-    text-align: left;
-    resize: none;
-    overflow: auto;
-    max-height: 250px;
-    height: 30px;
-    width: 277px;
-    padding-top: 10px;
-    padding-bottom: 0px;
-    padding-left: 10px;
-    padding-right: 10px;
-}
-
-#link a {
-    font-style: normal;
-    text-decoration: none;
-    color: #4268da;
-}
-
-#target {
-    max-height: 250px;
-    min-height: 20px;
-    overflow-y: auto;
-    word-wrap: break-word;
-}
-
-#link {
-    margin-top: 3px;
-}
-
-#langList {
-    font: inherit;
-    text-align: left;
-    float: right;
-    margin-bottom: 20px;
-    max-width: 140px;
-}
-
-::-moz-selection {
-    background: #ebebeb;
-}