diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 0304de1..1273eca 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -53,6 +53,7 @@ MainWindow::MainWindow(QWidget *parent) :
                           "QLabel#systemMsgBar{min-width:500px;}\n"
                           "QWidget QWidget#statusBarWidget{min-width:300px;}\n"
                           "QWidget QToolButton{border:none;border-radius:10%;font-size:26px; font-weight:Bold;padding:5px;}\n"
+                          "QToolButton#btn_main{border:2px solid #0078d8;border-radius:10%;font-size:26px; font-weight:Bold;padding:5px;}\n"
                           "QWidget QToolButton:disabled{color:#606060  }\n"
                           "QWidget QToolButton:hover{background:#505050;}\n"
                           "QWidget QToolButton:checked{border:5px solid darkorange;padding:0px;}"