html,
body {
height: 100%;
margin: 0;
padding: 0;
border: 0;
background-image: url("../img/france.jpg");
/* Background image from www.pixabay.com */
/*"All images and videos on Pixabay are released free of copyrights under Creative Commons CC0." */
background-repeat: no-repeat;
background-size: cover;
/*width: 100vw;*/
}
body {
background-color: #a9a9a9;
/*margin-bottom: 100px;*/
}
#wrapper {
min-height: 100%;
margin: 0 auto;
width: 1000px;
position: relative;
background-color: #fff;
/*border-left: 5px solid #313131;*/
/*border-right: 5px solid #313131;*/
}
#header {
height: 200px;
background-image: url("../img/Me.jpg");
}
#footer {
/*background-image: url("../img/Me_footer.jpg");*/
display: inline-block;
height: 200px;
background-color: red;
/*position: absolute;*/
width: 100%;
/*bottom: 0;*/
/*left: 0;*/
border-top: 1px solid red;
}
#home,
#om_mig,
#histernet,
#integnet {
width: 200px;
float: left;
border-top: 1px solid #313131;
border-left: 1px solid #313131;
border-right: 1px solid #313131;
margin: 10px 0 0 38.4px;
border-top-right-radius: 10px;
border-top-left-radius: 10px;
text-align: center;
padding: 10px 0;
}
span {
font-size: 20px;
font-weight: bolder;
}
#main_content {
padding: 20px;
background-color: green;
border-top: 5px solid #313131;
display: flex;
flex-direction: column;
/*height: calc(100% - 200px);*/
}
.active {
background-color: yellow;
-webkit-box-shadow: inset 4px 4px 7px -2px rgba(0, 0, 0, 0.75);
-moz-box-shadow: inset 4px 4px 7px -2px rgba(0, 0, 0, 0.75);
box-shadow: inset 4px 4px 7px -2px rgba(0, 0, 0, 0.75);
}
.inactive {
background-color: lightgrey;
-webkit-box-shadow: inset 4px 3px 7px -2px rgba(0, 0, 0, 0.75);
-moz-box-shadow: 4px 3px 7px -2px rgba(0, 0, 0, 0.75);
box-shadow: 4px 3px 7px -2px rgba(0, 0, 0, 0.75);
}
#clear,
#footer {
clear: both;
/*bottom: 100px;*/
}
<div id="wrapper">
<div id="header"></div>
<div id="content">
<a href="#">
<div id="home" class="active">
<span id="nav_text">Home</span>
</div>
</a>
<a href="#">
<div id="om_mig" class="inactive">
<span id="nav_text">About</span>
</div>
</a>
<a href="#">
<div id="histernet" class="inactive">
<span id="nav_text">Internet</span>
</div>
</a>
<a href="#">
<div id="integnet" class="inactive">
<span id="nav_text">Ethics</span>
</div>
</a>
<div id="clear"></div>
<div id="main_content">Main content
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</div>
</div>
<!-- content -->
<div id="footer">Footer</div>
</div>
<!-- wrapper -->