* {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    vertical-align: baseline;
    background: transparent;
}

body {
    overflow-x: hidden;
    font-family: Helvetica, Arial, sans-serif;
    background-color: #c0c5ce;
}

#menu_bar{
	background-color: rgb(52, 52, 52);
	overflow: auto;
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
}

.menu_item{
	display: inline-block;
	color: rgb(242, 242, 242);
	text-decoration: none;
	padding: 5px;
	margin: 5px;
	font-size: 14pt;
}

.menu_item:hover{
	background-color: rgb(105, 104, 104);
	border-radius: 5px;
}

.active_item{
	background-color: rgb(57, 92, 127);
	padding-left: 10px;
	padding-right: 10px;
	border-radius: 5px;
}


#main_frame{
	position: fixed;
	width: 100vw;
    top: 65px;
    height: calc(100% - 65px);
    background-color: #c0c5ce;
    text-align: center;
    overflow: auto;
}

#content_frame{
    width: 900px;
    margin: auto;
    margin-top: 15px;
    background-color: #f0f2f5;
    color: #1f2020;
    box-shadow: 5px 5px 10px rgb(34, 34, 34);
    overflow: auto;

 
    border-radius: 5px;
    text-align: left;

}

#main_image{
    width: calc(100% - 10px);
    margin: 5px 5px 15px 5px;
}

#main_text{
    margin-left: 5px;
}

#main_text ul{
    margin-left: 20px;
}

#main_text ul li{
    margin-bottom: 1ex;
}

@media screen and (max-width: 900px){
    #title_bar{left: 0; width: 100%;}
    #main_frame{left: 0; width: 100%;}
    #content_frame{  width: 98%;  margin-bottom: 90px ;}
}