diff --git a/popup.css b/popup.css
new file mode 100644
index 0000000..92bd72d
--- /dev/null
+++ b/popup.css
@@ -0,0 +1,63 @@
+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;
+}
diff --git a/simple-translate.css b/simple-translate.css
new file mode 100644
index 0000000..2d63efe
--- /dev/null
+++ b/simple-translate.css
@@ -0,0 +1,74 @@
+#simple-translate-button {
+    all: initial;
+    background-color: #fff;
+    box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.16), 0 0 0 1px rgba(0, 0, 0, 0.08);
+    border-radius: 10%;
+    background-image: url("icons/512.png");
+    background-size: 75%;
+    background-repeat: no-repeat;
+    background-position: center;
+    height: 22px;
+    width: 22px;
+    position: fixed;
+    z-index: 2147483647;
+    left: 0px;
+    top: 0px;
+    display: none;
+    cursor: pointer;
+    animation-duration: 200ms;
+    animation-name: simple-translate-showButton;
+}
+
+#simple-translate-panel {
+    all: initial;
+    background-color: #fff;
+    box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.16), 0 0 0 1px rgba(0, 0, 0, 0.08);
+    border-radius: 3px;
+    min-height: 20px;
+    max-height: 200px;
+    line-height: 150%;
+    height: auto;
+    min-width: 10px;
+    max-width: 300px;
+    position: fixed;
+    padding: 10px 18px;
+    z-index: 2147483646;
+    left: 0px;
+    top: 0px;
+    display: none;
+    overflow-y: auto;
+}
+
+#simple-translate-panel p {
+    all: initial;
+    font-family: 'Sugoe UI', 'Hiragino Kaku Gothic Pro', 'ヒラギノ角ゴ Pro W3', 'Meiryo', 'メイリオ', 'Osaka', 'arial', 'helvetica', 'MS PGothic', 'sans-serif' !important;
+    text-align: left;
+    display: inline-block;
+    margin: 0;
+    word-wrap: break-word;
+}
+
+#simple-translate-panel p::-moz-selection {
+    background: #ebebeb;
+}
+
+@keyframes simple-translate-showButton {
+    0% {
+        transform: scale3d(1, 1, 1);
+    }
+    50% {
+        transform: scale3d(1.1, 1.1, 1.1);
+    }
+    100% {
+        transform: scale3d(1, 1, 1);
+    }
+}
+
+@keyframes simple-translate-fadein {
+    from {
+        opacity: 0;
+    }
+    to {
+        opacity: 1;
+    }
+}