diff --git a/src/core/theme.cpp b/src/core/theme.cpp
index 9c4609c6..db50f7de 100644
--- a/src/core/theme.cpp
+++ b/src/core/theme.cpp
@@ -5,6 +5,7 @@
 #include <QSettings>
 #include <QFileInfo>
 #include <QJsonDocument>
+#include <QApplication>
 
 #include "exception.h"
 #include <utils/fileutils.h>
@@ -71,7 +72,7 @@ Theme *Theme::fromFolder(const QString &p_folder)
     Q_ASSERT(!p_folder.isEmpty());
     auto obj = readPaletteFile(p_folder);
     auto metadata = readMetadata(obj);
-    auto paletteObj = translatePalette(obj);
+    auto paletteObj = translatePalette(obj, metadata.m_backfillSystemPalette);
     return new Theme(p_folder,
                      metadata,
                      paletteObj);
@@ -86,11 +87,68 @@ Theme::Metadata Theme::readMetadata(const Palette &p_obj)
     data.m_revision = metaObj[QStringLiteral("revision")].toInt();
     data.m_editorHighlightTheme = metaObj[QStringLiteral("editor-highlight-theme")].toString();
     data.m_markdownEditorHighlightTheme = metaObj[QStringLiteral("markdown-editor-highlight-theme")].toString();
+    data.m_backfillSystemPalette = metaObj[QStringLiteral("backfill-system-palette")].toBool(false);
 
     return data;
 }
 
-Theme::Palette Theme::translatePalette(const QJsonObject &p_obj)
+QJsonObject Theme::backfillSystemPalette(QJsonObject p_obj)
+{
+    const auto qpalette = QApplication::palette();
+    // Active.
+    {
+        QJsonObject obj;
+        obj["window"] = qpalette.color(QPalette::Active, QPalette::Window).name();
+        obj["window_text"] = qpalette.color(QPalette::Active, QPalette::WindowText).name();
+        obj["base"] = qpalette.color(QPalette::Active, QPalette::Base).name();
+        obj["alternate_base"] = qpalette.color(QPalette::Active, QPalette::AlternateBase).name();
+        obj["text"] = qpalette.color(QPalette::Active, QPalette::Text).name();
+        obj["button"] = qpalette.color(QPalette::Active, QPalette::Button).name();
+        obj["button_text"] = qpalette.color(QPalette::Active, QPalette::ButtonText).name();
+        obj["bright_text"] = qpalette.color(QPalette::Active, QPalette::BrightText).name();
+        obj["light"] = qpalette.color(QPalette::Active, QPalette::Light).name();
+        obj["midlight"] = qpalette.color(QPalette::Active, QPalette::Midlight).name();
+        obj["dark"] = qpalette.color(QPalette::Active, QPalette::Dark).name();
+        obj["highlight"] = qpalette.color(QPalette::Active, QPalette::Highlight).name();
+        obj["highlighted_text"] = qpalette.color(QPalette::Active, QPalette::HighlightedText).name();
+        obj["link"] = qpalette.color(QPalette::Active, QPalette::Link).name();
+        obj["link_visited"] = qpalette.color(QPalette::Active, QPalette::LinkVisited).name();
+
+        p_obj["active"] = obj;
+    }
+
+    // Inactive.
+    {
+        QJsonObject obj;
+        p_obj["inactive"] = obj;
+    }
+
+    // Disabled.
+    {
+        QJsonObject obj;
+        obj["window"] = qpalette.color(QPalette::Disabled, QPalette::Window).name();
+        obj["window_text"] = qpalette.color(QPalette::Disabled, QPalette::WindowText).name();
+        obj["base"] = qpalette.color(QPalette::Disabled, QPalette::Base).name();
+        obj["alternate_base"] = qpalette.color(QPalette::Disabled, QPalette::AlternateBase).name();
+        obj["text"] = qpalette.color(QPalette::Disabled, QPalette::Text).name();
+        obj["button"] = qpalette.color(QPalette::Disabled, QPalette::Button).name();
+        obj["button_text"] = qpalette.color(QPalette::Disabled, QPalette::ButtonText).name();
+        obj["bright_text"] = qpalette.color(QPalette::Disabled, QPalette::BrightText).name();
+        obj["light"] = qpalette.color(QPalette::Disabled, QPalette::Light).name();
+        obj["midlight"] = qpalette.color(QPalette::Disabled, QPalette::Midlight).name();
+        obj["dark"] = qpalette.color(QPalette::Disabled, QPalette::Dark).name();
+        obj["highlight"] = qpalette.color(QPalette::Disabled, QPalette::Highlight).name();
+        obj["highlighted_text"] = qpalette.color(QPalette::Disabled, QPalette::HighlightedText).name();
+        obj["link"] = qpalette.color(QPalette::Disabled, QPalette::Link).name();
+        obj["link_visited"] = qpalette.color(QPalette::Disabled, QPalette::LinkVisited).name();
+
+        p_obj["disabled"] = obj;
+    }
+
+    return p_obj;
+}
+
+Theme::Palette Theme::translatePalette(const QJsonObject &p_obj, bool p_backfillSystemPalette)
 {
     const QString paletteSection("palette");
     const QString baseSection("base");
@@ -99,7 +157,12 @@ Theme::Palette Theme::translatePalette(const QJsonObject &p_obj)
     // @p_palette may contain referenced definitons: derived=@base#sub#sub2.
     Palette palette;
 
-    palette[paletteSection] = p_obj[paletteSection];
+    if (p_backfillSystemPalette) {
+        palette[paletteSection] = backfillSystemPalette(p_obj[paletteSection].toObject());
+    } else {
+        palette[paletteSection] = p_obj[paletteSection];
+    }
+
     palette[baseSection] = p_obj[baseSection];
     palette[widgetsSection] = p_obj[widgetsSection];
 
@@ -162,8 +225,9 @@ QPair<bool, int> Theme::translatePaletteObjectOnce(const Palette &p_palette,
                 }
 
                 Q_ASSERT_X(refVal.isString(), "translatePaletteObjectOnce", val.toString().toStdString().c_str());
-                it.value() = refVal.toString();
-                if (isRef(refVal.toString())) {
+                const auto refValStr = refVal.toString();
+                it.value() = refValStr;
+                if (isRef(refValStr)) {
                     // It is another ref again.
                     ++unresolvedRefs;
                 }
diff --git a/src/core/theme.h b/src/core/theme.h
index d44e56d2..cf293977 100644
--- a/src/core/theme.h
+++ b/src/core/theme.h
@@ -70,6 +70,9 @@ namespace vnotex
             // If not specified, will use m_editorHighlightTheme.
             // Valid only when KSyntaxCodeBlockHighlighter is used.
             QString m_markdownEditorHighlightTheme;
+
+            // Whether this theme needs to backfill current standard palette to the theme palette.
+            bool m_backfillSystemPalette = false;
         };
 
         typedef QJsonObject Palette;
@@ -86,7 +89,9 @@ namespace vnotex
 
         static Metadata readMetadata(const QJsonObject &p_obj);
 
-        static Theme::Palette translatePalette(const QJsonObject &p_obj);
+        static Theme::Palette translatePalette(const QJsonObject &p_obj, bool p_backfillSystemPalette);
+
+        static QJsonObject backfillSystemPalette(QJsonObject p_obj);
 
         static void translatePaletteObject(const Palette &p_palette,
                                            QJsonObject &p_obj,
diff --git a/src/data/extra/themes/moonlight/interface.qss b/src/data/extra/themes/moonlight/interface.qss
index 432299a1..560d2fd6 100644
--- a/src/data/extra/themes/moonlight/interface.qss
+++ b/src/data/extra/themes/moonlight/interface.qss
@@ -280,7 +280,7 @@ QMenu::icon {
 }
 
 QMenu::item {
-    padding: 5px 30px 5px 30px;
+    padding: 5px 22px 5px 22px;
     border: 1px solid transparent;
 }
 
diff --git a/src/data/extra/themes/native/highlight.css b/src/data/extra/themes/native/highlight.css
index f0980dc8..b5a74338 100644
--- a/src/data/extra/themes/native/highlight.css
+++ b/src/data/extra/themes/native/highlight.css
@@ -10,7 +10,6 @@ code[class*="language-"],
 pre[class*="language-"] {
     color: black;
     background: none;
-    text-shadow: 0 1px white;
     font-size: 1em;
     text-align: left;
     white-space: pre;
@@ -32,15 +31,15 @@ pre[class*="language-"] {
 pre[class*="language-"]::-moz-selection, pre[class*="language-"] ::-moz-selection,
 code[class*="language-"]::-moz-selection, code[class*="language-"] ::-moz-selection {
     text-shadow: none;
-    background-color: #1976D2;
-    color: white;
+    background-color: #1976d2;
+    color: #ffffff;
 }
 
 pre[class*="language-"]::selection, pre[class*="language-"] ::selection,
 code[class*="language-"]::selection, code[class*="language-"] ::selection {
     text-shadow: none;
-    background-color: #1976D2;
-    color: white;
+    background-color: #1976d2;
+    color: #ffffff;
 }
 
 @media print {
@@ -59,7 +58,7 @@ pre[class*="language-"] {
 
 :not(pre) > code[class*="language-"],
 pre[class*="language-"] {
-    background: #f5f2f0;
+    background: #ede8e4;
 }
 
 /* Inline code */
@@ -109,8 +108,6 @@ pre[class*="language-"] {
 .language-css .token.string,
 .style .token.string {
     color: #9a6e3a;
-    /* This background color was intended by the author of this theme. */
-    background: hsla(0, 0%, 100%, .5);
 }
 
 .token.atrule,
diff --git a/src/data/extra/themes/native/interface.qss b/src/data/extra/themes/native/interface.qss
index 4b9a8659..7d48afb9 100644
--- a/src/data/extra/themes/native/interface.qss
+++ b/src/data/extra/themes/native/interface.qss
@@ -27,7 +27,7 @@ QWidget[HitSettingWidget="true"] {
 
 /* ToolBox */
 vnotex--ToolBox QWidget[ToolBoxTitle="true"] {
-    border-bottom: 2px solid @widgets#toolbox#title#border;
+    border-bottom: 2px solid;
     margin: 0px;
     padding: 0px;
 }
@@ -40,9 +40,6 @@ vnotex--ToolBox QToolButton[ToolBoxTitleButton="true"] {
 
 vnotex--ToolBox QToolButton[ToolBoxTitleButton="true"]:checked {
     font-weight: bold;
-    /* Reverse */
-    color: @widgets#toolbox#title#button#active#fg;
-    background-color: @widgets#toolbox#title#button#active#bg;
 }
 
 /* TitleBar */
@@ -69,7 +66,6 @@ QMainWindow::separator {
     width: 1px;
     /* For horizontal */
     height: 1px;
-    background-color: @widgets#qmainwindow#separator#bg;
 }
 
 /* NotebookExplorer */
@@ -114,7 +110,6 @@ vnotex--DragDropAreaIndicator {
 }
 
 vnotex--DragDropAreaIndicator QLabel {
-    color: @widgets#dragdropareaindicator#fg;
     font-size: 12pt;
     font-weight: bold;
 }
@@ -131,3 +126,20 @@ vnotex--ViewSplit QTabBar[ViewSplitFlash="true"]::tab:selected {
 vnotex--EntryPopup {
     border: 1px solid @widgets#unitedentry#popup#border;
 }
+
+/* QWidgetAction item */
+vnotex--LabelWithButtonsWidget {
+    background-color: @widgets#qmenu#bg;
+}
+
+vnotex--LabelWithButtonsWidget:hover {
+    background-color: @widgets#qmenu#item#selected#bg;
+}
+
+vnotex--LabelWithButtonsWidget QLabel {
+    color: @widgets#qmenu#fg;
+}
+
+vnotex--LabelWithButtonsWidget QLabel:hover {
+    color: @widgets#qmenu#item#selected#fg;
+}
diff --git a/src/data/extra/themes/native/palette.json b/src/data/extra/themes/native/palette.json
index 77b2feea..692179cf 100644
--- a/src/data/extra/themes/native/palette.json
+++ b/src/data/extra/themes/native/palette.json
@@ -1,6 +1,6 @@
 {
     "metadata" : {
-        "revision" : 0,
+        "revision" : 1,
         "//comment" : "If there is a file named 'editor-highlight.theme' under theme folder, this value will be ignored.",
         "//comment" : "Otherwise, this value specify the theme name to use for syntax highlighting.",
         "editor-highlight-theme" : "Default",
@@ -10,33 +10,39 @@
         "markdown-editor-highlight-theme" : "Markdown Default",
         "display_name" : "Native",
         "//comment" : "Display name for different locales",
-        "display_name_zh_CN" : "原素"
+        "display_name_zh_CN" : "原素",
+        "backfill-system-palette": true
+    },
+    "palette" : {
+        "//comment" : "VNote will backfill the standard system palette."
     },
     "base" : {
         "normal" : {
-            "fg" : "#31373c",
-            "border" : "@base#lighter#fg"
+            "fg" : "@palette#active#window_text",
+            "border" : "@palette#active#dark",
+            "bg" : "@palette#active#window"
         },
-        "lighter" : {
-            "fg" : "#babdc1"
+        "selected" : {
+            "fg" : "@palette#active#highlighted_text",
+            "bg" : "@palette#active#highlight"
         },
         "error" : {
             "fg" : "#b71c1c"
         },
         "warning" : {
-            "fg" : "#880e4f"
+            "fg" : "#fc766a"
         },
         "info" : {
-            "fg" : "#283593"
+            "fg" : "#00a4cc"
         },
         "danger" : {
             "fg": "#f5f5f5",
-            "bg": "#c9302c"
+            "bg": "#ed2b33"
         },
         "icon" : {
-            "fg" : "#434b52",
+            "fg" : "@palette#active#text",
             "disabled" : {
-                "fg" : "@base#lighter#fg"
+                "fg" : "@palette#disabled#text"
             },
             "warning" : {
                 "fg" : "@base#warning#fg"
@@ -49,8 +55,8 @@
             }
         },
         "master" : {
-            "fg" : "#fbffff",
-            "bg" : "#535c65"
+            "fg" : "#fcf6f5",
+            "bg" : "#89abe3"
         }
     },
     "widgets" : {
@@ -106,28 +112,33 @@
         },
         "viewsplit" : {
             "action_button" : {
-                "fg" : "#808080",
+                "fg" : "@palette#active#dark",
                 "active" : {
                     "fg" : "@base#icon#fg"
                 }
             },
             "flash" : {
-                "bg" : "@base#lighter#fg"
-            }
-        },
-        "qmainwindow" : {
-            "separator" : {
-                "bg" : "@base#normal#border"
+                "bg" : "@base#info#fg"
             }
         },
         "dragdropareaindicator" : {
-            "fg" : "@base#normal#fg",
-            "border" : "@widgets#dragdropareaindicator#fg"
+            "border" : "@base#normal#border"
         },
         "navigationlabel" : {
             "fg" : "@widgets#toolbox#title#button#active#fg",
             "bg" : "@widgets#toolbox#title#button#active#bg"
         },
+        "qmenu" : {
+            "fg" : "@base#normal#fg",
+            "bg" : "@base#normal#bg",
+            "border" : "@base#normal#border",
+            "item" : {
+                "selected" : {
+                    "fg" : "@base#selected#fg",
+                    "bg" : "@base#selected#bg"
+                }
+            }
+        },
         "quickselector" : {
             "item_icon" : {
                 "fg" : "@base#master#bg",
diff --git a/src/data/extra/themes/native/text-editor.theme b/src/data/extra/themes/native/text-editor.theme
index 088afb1a..9be9b305 100644
--- a/src/data/extra/themes/native/text-editor.theme
+++ b/src/data/extra/themes/native/text-editor.theme
@@ -1,14 +1,16 @@
 {
     "metadata" : {
         "revision" : 0,
-        "name" : "Default",
+        "name" : "Native",
         "type" : "vtextedit"
     },
     "editor-styles" : {
         "Text" : {
             "//comment" : "Support a list of fonts separated by ,",
             "font-family" : "YaHei Consolas Hybrid, Consolas, Monaco, Andale Mono, Monospace, Courier New",
-            "font-size" : 12
+            "font-size" : 12,
+            "text-color" : "#222222",
+            "background-color" : "#ffffff"
         },
         "CursorLine" : {
             "background-color" : "#c5cae9"
@@ -26,7 +28,7 @@
         },
         "IndicatorsBorder" : {
             "text-color" : "#aaaaaa",
-            "background-color" : "#eeeeee"
+            "background-color" : "#fafafa"
         },
         "CurrentLineNumber" : {
             "text-color" : "#222222"
@@ -64,7 +66,9 @@
         "Text" : {
             "//comment" : "Support a list of fonts separated by ,",
             "font-family" : "YaHei Consolas Hybrid, 冬青黑体, Microsoft YaHei, 微软雅黑, Microsoft YaHei UI, WenQuanYi Micro Hei, 文泉驿雅黑, Dengxian, 等线体, STXihei, 华文细黑, Liberation Sans, Droid Sans, NSimSun, 新宋体, SimSun, 宋体, Verdana, Helvetica, Tahoma, Arial, Geneva, Georgia, Times New Roman",
-            "font-size" : 12
+            "font-size" : 12,
+            "text-color" : "#222222",
+            "background-color" : "#ffffff"
         }
     },
     "markdown-syntax-styles" : {
diff --git a/src/data/extra/themes/native/web.css b/src/data/extra/themes/native/web.css
index b4bdce44..0f74d147 100644
--- a/src/data/extra/themes/native/web.css
+++ b/src/data/extra/themes/native/web.css
@@ -4,6 +4,7 @@ body {
     color: #222222;
     line-height: 1.5;
     padding: 16px;
+    background-color: #ffffff;
     font-size: 16px;
 }
 
@@ -55,11 +56,10 @@ a {
 
 a:hover {
     text-decoration: underline;
-    color: #ff6600;
 }
 
 a:visited {
-    color: purple;
+    color: #800080;
 }
 
 ul, ol {
@@ -91,7 +91,7 @@ pre {
 
 code {
     font-family: "YaHei Consolas Hybrid", Consolas, Monaco, "Andale Mono", Monospace, "Courier New";
-    color: #8E24AA;
+    color: #8e24aa;
     word-break: break-word;
 }
 
@@ -100,7 +100,7 @@ pre code {
     padding-left: 0.5em;
     padding-right: 0.5em;
     color: #222222;
-    background-color: #E0E0E0;
+    background-color: #e0e0e0;
     line-height: 1.5;
     font-family: "YaHei Consolas Hybrid", Consolas, Monaco, "Andale Mono", Monospace, "Courier New";
     white-space: pre;
@@ -116,14 +116,14 @@ aside {
 }
 
 blockquote {
-    color: #666;
-    border-left: .5em solid #7A7A7A;
+    color: #666666;
+    border-left: .5em solid #7a7a7a;
     padding: 0 1em;
     margin-left: 0;
 }
 
 blockquote p {
-    color: #666;
+    color: #666666;
 }
 
 hr {
@@ -132,7 +132,7 @@ hr {
     margin: 1em 0;
     border: none;
     height: 2px;
-    background-color: #999;
+    background-color: #999999;
 }
 
 table {
@@ -143,13 +143,13 @@ table {
 
 table tr {
    border-top: 1px solid #cccccc;
-   background-color: white;
+   background-color: #ffffff;
    margin: 0;
    padding: 0;
 }
 
 table tr:hover {
-   background-color: #f8f8f8;
+   background-color: #dadada;
 }
 
 table tr th {
@@ -173,9 +173,35 @@ table tr th :last-child, table tr td :last-child {
    margin-bottom: 0;
 }
 
+div.vx-mermaid-graph {
+    margin: 16px 0px 16px 0px;
+    overflow-y: hidden;
+}
+
+div.vx-flowchartjs-graph {
+    padding: 0px 5px 0px 5px;
+    margin: 16px 0px 16px 0px;
+    width: fit-content;
+    overflow: hidden;
+}
+
+div.vx-wavedrom-graph {
+    padding: 0px 5px 0px 5px;
+    margin: 16px 0px 16px 0px;
+    width: fit-content;
+    overflow: hidden;
+}
+
+div.vx-plantuml-graph {
+    padding: 5px 5px 0px 5px;
+    margin: 16px 0px 16px 0px;
+    width: fit-content;
+    overflow: hidden;
+}
+
 ::selection {
-  background-color: #1976D2;
-  color: white;
+  background-color: #1976d2;
+  color: #ffffff;
 }
 
 #vx-content span.vx-search-match {
diff --git a/src/data/extra/themes/pure/interface.qss b/src/data/extra/themes/pure/interface.qss
index 2eac64ea..e7ba7582 100644
--- a/src/data/extra/themes/pure/interface.qss
+++ b/src/data/extra/themes/pure/interface.qss
@@ -299,7 +299,7 @@ QMenu::icon {
 }
 
 QMenu::item {
-    padding: 5px 30px 5px 30px;
+    padding: 5px 22px 5px 22px;
     border: 1px solid transparent;
 }
 
diff --git a/src/data/extra/themes/pure/text-editor.theme b/src/data/extra/themes/pure/text-editor.theme
index 597a5fc3..693a4fb6 100644
--- a/src/data/extra/themes/pure/text-editor.theme
+++ b/src/data/extra/themes/pure/text-editor.theme
@@ -1,7 +1,7 @@
 {
     "metadata" : {
         "revision" : 0,
-        "name" : "Moonlight",
+        "name" : "Pure",
         "type" : "vtextedit"
     },
     "editor-styles" : {
diff --git a/src/data/extra/themes/pure/web.css b/src/data/extra/themes/pure/web.css
index 0b94a9dd..d089adf9 100644
--- a/src/data/extra/themes/pure/web.css
+++ b/src/data/extra/themes/pure/web.css
@@ -16,33 +16,36 @@ h1, h2, h3, h4, h5, h6 {
     padding: 0;
 }
 
+p, blockquote, ul, ol, dl, table {
+    margin: 0.4em 0;
+}
+
 p {
     padding: 0;
-    margin-bottom: 16px;
 }
 
 h1 {
-    font-size: 26px;
+    font-size: 2rem;
 }
 
 h2 {
-    font-size: 24px;
+    font-size: 1.75rem;
 }
 
 h3 {
-    font-size: 22px;
+    font-size: 1.4rem;
 }
 
 h4 {
-    font-size: 20px;
+    font-size: 1.2rem;
 }
 
 h5 {
-    font-size: 19px;
+    font-size: 1rem;
 }
 
 h6 {
-    font-size: 18px;
+    font-size: 1rem;
 }
 
 a {
@@ -59,7 +62,7 @@ a:hover {
 }
 
 a:visited {
-    color: #800080;
+    color: purple;
 }
 
 ul, ol {
@@ -119,7 +122,6 @@ blockquote {
     color: #666666;
     border-left: .5em solid #7a7a7a;
     padding: 0 1em;
-    margin-left: 0;
 }
 
 blockquote p {
@@ -282,3 +284,84 @@ div.vx-plantuml-graph {
     color: #222222;
     background-color: #66bb6a;
 }
+
+.vx-alert{
+    background-color: #E2EDF3 !important;
+    padding: 12px 24px 12px 30px !important;
+    border-radius:0 !important;
+    border:none !important;
+    border-left: 4px solid #498BA7 !important;
+    color: inherit !important;
+}
+
+.vx-alert::before
+{
+    background-color: #498BA7;
+    border-radius: 100%;
+    color: #fff;
+    content: '!';
+    font-family: 'Dosis', 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
+    font-size: 14px;
+    font-weight: bold;
+    left: -12px;
+    line-height: 20px;
+    position: absolute;
+    height: 20px;
+    width: 20px;
+    text-align: center;
+    top: 14px;
+}
+
+.alert-success,.alert-s{
+    border-color: #42B983 !important;
+    background-color: #D4EDDA !important;
+}
+
+.alert-success::before,.alert-s::before{
+    background-color: #42B983;
+}
+
+.alert-warning,.alert-w{
+    border-color: #ffa502 !important;
+    background-color: #fff3cd !important;
+}
+
+.alert-warning:before,.alert-w::before{
+    background-color: #ffa502;
+}
+
+.alert-info,.alert-i{
+    border-color: #70a1ff !important;
+    background-color: #CCE5FF !important;
+}
+
+.alert-info:before,.alert-i::before{
+    background-color: #70a1ff;
+}
+
+.alert-danger,.alert-d{
+    border-color: #ff4757 !important;
+    background-color: #F8D7DA !important;
+}
+
+.alert-danger:before,.alert-d::before{
+    background-color: #ff4757;
+}
+
+.alert-light{
+    border-color: #C1C1C1 !important;
+    background-color: #f8f8f8 !important;
+}
+
+.alert-light:before{
+    background-color: #C1C1C1;
+}
+
+.alert-dark{
+    border-color: #484848 !important;
+    background-color: #F0F0F0 !important;
+}
+
+.alert-dark:before{
+    background-color: #484848;
+}
diff --git a/src/data/extra/themes/solarized-dark/interface.qss b/src/data/extra/themes/solarized-dark/interface.qss
index e4f97238..891152ae 100644
--- a/src/data/extra/themes/solarized-dark/interface.qss
+++ b/src/data/extra/themes/solarized-dark/interface.qss
@@ -276,7 +276,7 @@ QMenu::icon {
 }
 
 QMenu::item {
-    padding: 5px 30px 5px 30px;
+    padding: 5px 22px 5px 22px;
     border: 1px solid transparent;
 }
 
diff --git a/src/data/extra/themes/solarized-light/interface.qss b/src/data/extra/themes/solarized-light/interface.qss
index e4f97238..891152ae 100644
--- a/src/data/extra/themes/solarized-light/interface.qss
+++ b/src/data/extra/themes/solarized-light/interface.qss
@@ -276,7 +276,7 @@ QMenu::icon {
 }
 
 QMenu::item {
-    padding: 5px 30px 5px 30px;
+    padding: 5px 22px 5px 22px;
     border: 1px solid transparent;
 }
 
diff --git a/src/data/extra/themes/vscode-dark/interface.qss b/src/data/extra/themes/vscode-dark/interface.qss
index e4f97238..891152ae 100644
--- a/src/data/extra/themes/vscode-dark/interface.qss
+++ b/src/data/extra/themes/vscode-dark/interface.qss
@@ -276,7 +276,7 @@ QMenu::icon {
 }
 
 QMenu::item {
-    padding: 5px 30px 5px 30px;
+    padding: 5px 22px 5px 22px;
     border: 1px solid transparent;
 }
 
diff --git a/src/widgets/mainwindow.cpp b/src/widgets/mainwindow.cpp
index 73b8f797..d1885119 100644
--- a/src/widgets/mainwindow.cpp
+++ b/src/widgets/mainwindow.cpp
@@ -21,7 +21,6 @@
 #include <QProgressDialog>
 #include <QHotkey>
 
-#include "toolbox.h"
 #include "notebookexplorer.h"
 #include "vnotex.h"
 #include "notebookmgr.h"
diff --git a/src/widgets/mainwindow.h b/src/widgets/mainwindow.h
index 38ba88af..f14fce09 100644
--- a/src/widgets/mainwindow.h
+++ b/src/widgets/mainwindow.h
@@ -17,7 +17,6 @@ class QTextEdit;
 
 namespace vnotex
 {
-    class ToolBox;
     class NotebookExplorer;
     class TagExplorer;
     class ViewArea;
@@ -163,8 +162,6 @@ namespace vnotex
 
         DockWidgetHelper m_dockWidgetHelper;
 
-        ToolBox *m_navigationToolBox = nullptr;
-
         NotebookExplorer *m_notebookExplorer = nullptr;
 
         TagExplorer *m_tagExplorer = nullptr;