make div go from right to bottom on responsive design - css

Question

I'm using this left sidebar. I also add a div on right with a left padding the size of the sidebar.
Now if I switch to a smaller screen sidebar's goes on top (which is a desired result) but my div keeps the padding and content is on the rigth of my screen.
How can I make my div go below the sidebar with a the size height. Is it even possible?
.nav-side-menu {
overflow: auto;
font-family: verdana;
font-size: 12px;
font-weight: 200;
background-color: #2e353d;
position: fixed;
top: 0px;
width: 300px;
height: 100%;
color: #e1ffff;
}
.nav-side-menu .brand {
background-color: #23282e;
line-height: 50px;
display: block;
text-align: center;
font-size: 14px;
}
.nav-side-menu .toggle-btn {
display: none;
}
.nav-side-menu ul,
.nav-side-menu li {
list-style: none;
padding: 0px;
margin: 0px;
line-height: 35px;
cursor: pointer;
/*
.collapsed{
.arrow:before{
font-family: FontAwesome;
content: "\f053";
display: inline-block;
padding-left:10px;
padding-right: 10px;
vertical-align: middle;
float:right;
}
}
*/
}
.nav-side-menu ul :not(collapsed) .arrow:before,
.nav-side-menu li :not(collapsed) .arrow:before {
font-family: FontAwesome;
content: "\f078";
display: inline-block;
padding-left: 10px;
padding-right: 10px;
vertical-align: middle;
float: right;
}
.nav-side-menu ul .active,
.nav-side-menu li .active {
border-left: 3px solid #d19b3d;
background-color: #4f5b69;
}
.nav-side-menu ul .sub-menu li.active,
.nav-side-menu li .sub-menu li.active {
color: #d19b3d;
}
.nav-side-menu ul .sub-menu li.active a,
.nav-side-menu li .sub-menu li.active a {
color: #d19b3d;
}
.nav-side-menu ul .sub-menu li,
.nav-side-menu li .sub-menu li {
background-color: #181c20;
border: none;
line-height: 28px;
border-bottom: 1px solid #23282e;
margin-left: 0px;
}
.nav-side-menu ul .sub-menu li:hover,
.nav-side-menu li .sub-menu li:hover {
background-color: #020203;
}
.nav-side-menu ul .sub-menu li:before,
.nav-side-menu li .sub-menu li:before {
font-family: FontAwesome;
content: "\f105";
display: inline-block;
padding-left: 10px;
padding-right: 10px;
vertical-align: middle;
}
.nav-side-menu li {
padding-left: 0px;
border-left: 3px solid #2e353d;
border-bottom: 1px solid #23282e;
}
.nav-side-menu li a {
text-decoration: none;
color: #e1ffff;
}
.nav-side-menu li a i {
padding-left: 10px;
width: 20px;
padding-right: 20px;
}
.nav-side-menu li:hover {
border-left: 3px solid #d19b3d;
background-color: #4f5b69;
-webkit-transition: all 1s ease;
-moz-transition: all 1s ease;
-o-transition: all 1s ease;
-ms-transition: all 1s ease;
transition: all 1s ease;
}
#media (max-width: 767px) {
.nav-side-menu {
position: relative;
width: 100%;
margin-bottom: 10px;
}
.nav-side-menu .toggle-btn {
display: block;
cursor: pointer;
position: absolute;
right: 10px;
top: 10px;
z-index: 10 !important;
padding: 3px;
background-color: #ffffff;
color: #000;
width: 40px;
text-align: center;
}
.brand {
text-align: left !important;
font-size: 22px;
padding-left: 20px;
line-height: 50px !important;
}
}
#media (min-width: 767px) {
.nav-side-menu .menu-list .menu-content {
display: block;
}
}
body {
margin: 0px;
padding: 0px;
}
#content{
border: 1px solid black;
padding-left:300px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">
<div class="nav-side-menu">
<div class="brand">Brand Logo</div>
<i class="fa fa-bars fa-2x toggle-btn" data-toggle="collapse" data-target="#menu-content"></i>
<div class="menu-list">
<ul id="menu-content" class="menu-content collapse out">
<li>
<a href="#">
<i class="fa fa-dashboard fa-lg"></i> Dashboard
</a>
</li>
<li data-toggle="collapse" data-target="#products" class="collapsed active">
<i class="fa fa-gift fa-lg"></i> UI Elements <span class="arrow"></span>
</li>
<ul class="sub-menu collapse" id="products">
<li class="active">CSS3 Animation</li>
<li>General</li>
<li>Buttons</li>
<li>Tabs & Accordions</li>
<li>Typography</li>
<li>FontAwesome</li>
<li>Slider</li>
<li>Panels</li>
<li>Widgets</li>
<li>Bootstrap Model</li>
</ul>
<li data-toggle="collapse" data-target="#service" class="collapsed">
<i class="fa fa-globe fa-lg"></i> Services <span class="arrow"></span>
</li>
<ul class="sub-menu collapse" id="service">
<li>New Service 1</li>
<li>New Service 2</li>
<li>New Service 3</li>
</ul>
<li data-toggle="collapse" data-target="#new" class="collapsed">
<i class="fa fa-car fa-lg"></i> New <span class="arrow"></span>
</li>
<ul class="sub-menu collapse" id="new">
<li>New New 1</li>
<li>New New 2</li>
<li>New New 3</li>
</ul>
<li>
<a href="#">
<i class="fa fa-user fa-lg"></i> Profile
</a>
</li>
<li>
<a href="#">
<i class="fa fa-users fa-lg"></i> Users
</a>
</li>
</ul>
</div>
</div>
<div id="content">
my content is here with a 300px left padding but I would like my content box to be the width/height of the screen without padding when sidebar's on top.
</div>

Answer 1

Is it even possible?
It is. Simply override the padding-left property. Since #content is a direct sibling of the navbar (.nav-side-menu), you can use the adjacent sibling combinator (+) and apply the styles on the target screen.
#media (max-width: 767px) {
.nav-side-menu {
position: relative;
width: 100%;
margin-bottom: 10px;
}
.nav-side-menu + #content {
padding-left: 0;
}
/* the rest of the styles*/
}
.nav-side-menu {
overflow: auto;
font-family: verdana;
font-size: 12px;
font-weight: 200;
background-color: #2e353d;
position: fixed;
top: 0px;
width: 300px;
height: 100%;
color: #e1ffff;
}
.nav-side-menu .brand {
background-color: #23282e;
line-height: 50px;
display: block;
text-align: center;
font-size: 14px;
}
.nav-side-menu .toggle-btn {
display: none;
}
.nav-side-menu ul,
.nav-side-menu li {
list-style: none;
padding: 0px;
margin: 0px;
line-height: 35px;
cursor: pointer;
/*
.collapsed{
.arrow:before{
font-family: FontAwesome;
content: "\f053";
display: inline-block;
padding-left:10px;
padding-right: 10px;
vertical-align: middle;
float:right;
}
}
*/
}
.nav-side-menu ul :not(collapsed) .arrow:before,
.nav-side-menu li :not(collapsed) .arrow:before {
font-family: FontAwesome;
content: "\f078";
display: inline-block;
padding-left: 10px;
padding-right: 10px;
vertical-align: middle;
float: right;
}
.nav-side-menu ul .active,
.nav-side-menu li .active {
border-left: 3px solid #d19b3d;
background-color: #4f5b69;
}
.nav-side-menu ul .sub-menu li.active,
.nav-side-menu li .sub-menu li.active {
color: #d19b3d;
}
.nav-side-menu ul .sub-menu li.active a,
.nav-side-menu li .sub-menu li.active a {
color: #d19b3d;
}
.nav-side-menu ul .sub-menu li,
.nav-side-menu li .sub-menu li {
background-color: #181c20;
border: none;
line-height: 28px;
border-bottom: 1px solid #23282e;
margin-left: 0px;
}
.nav-side-menu ul .sub-menu li:hover,
.nav-side-menu li .sub-menu li:hover {
background-color: #020203;
}
.nav-side-menu ul .sub-menu li:before,
.nav-side-menu li .sub-menu li:before {
font-family: FontAwesome;
content: "\f105";
display: inline-block;
padding-left: 10px;
padding-right: 10px;
vertical-align: middle;
}
.nav-side-menu li {
padding-left: 0px;
border-left: 3px solid #2e353d;
border-bottom: 1px solid #23282e;
}
.nav-side-menu li a {
text-decoration: none;
color: #e1ffff;
}
.nav-side-menu li a i {
padding-left: 10px;
width: 20px;
padding-right: 20px;
}
.nav-side-menu li:hover {
border-left: 3px solid #d19b3d;
background-color: #4f5b69;
-webkit-transition: all 1s ease;
-moz-transition: all 1s ease;
-o-transition: all 1s ease;
-ms-transition: all 1s ease;
transition: all 1s ease;
}
#media (max-width: 767px) {
.nav-side-menu {
position: relative;
width: 100%;
margin-bottom: 10px;
}
.nav-side-menu + #content {
padding-left: 0;
}
.nav-side-menu .toggle-btn {
display: block;
cursor: pointer;
position: absolute;
right: 10px;
top: 10px;
z-index: 10 !important;
padding: 3px;
background-color: #ffffff;
color: #000;
width: 40px;
text-align: center;
}
.brand {
text-align: left !important;
font-size: 22px;
padding-left: 20px;
line-height: 50px !important;
}
}
#media (min-width: 767px) {
.nav-side-menu .menu-list .menu-content {
display: block;
}
}
body {
margin: 0px;
padding: 0px;
}
#content{
border: 1px solid black;
padding-left:300px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">
<div class="nav-side-menu">
<div class="brand">Brand Logo</div>
<i class="fa fa-bars fa-2x toggle-btn" data-toggle="collapse" data-target="#menu-content"></i>
<div class="menu-list">
<ul id="menu-content" class="menu-content collapse out">
<li>
<a href="#">
<i class="fa fa-dashboard fa-lg"></i> Dashboard
</a>
</li>
<li data-toggle="collapse" data-target="#products" class="collapsed active">
<i class="fa fa-gift fa-lg"></i> UI Elements <span class="arrow"></span>
</li>
<ul class="sub-menu collapse" id="products">
<li class="active">CSS3 Animation</li>
<li>General</li>
<li>Buttons</li>
<li>Tabs & Accordions</li>
<li>Typography</li>
<li>FontAwesome</li>
<li>Slider</li>
<li>Panels</li>
<li>Widgets</li>
<li>Bootstrap Model</li>
</ul>
<li data-toggle="collapse" data-target="#service" class="collapsed">
<i class="fa fa-globe fa-lg"></i> Services <span class="arrow"></span>
</li>
<ul class="sub-menu collapse" id="service">
<li>New Service 1</li>
<li>New Service 2</li>
<li>New Service 3</li>
</ul>
<li data-toggle="collapse" data-target="#new" class="collapsed">
<i class="fa fa-car fa-lg"></i> New <span class="arrow"></span>
</li>
<ul class="sub-menu collapse" id="new">
<li>New New 1</li>
<li>New New 2</li>
<li>New New 3</li>
</ul>
<li>
<a href="#">
<i class="fa fa-user fa-lg"></i> Profile
</a>
</li>
<li>
<a href="#">
<i class="fa fa-users fa-lg"></i> Users
</a>
</li>
</ul>
</div>
</div>
<div id="content">
my content is here with a 300px left padding but I would like my content box to be the width/height of the screen without padding when sidebar's on top.
</div>

Answer 2

From the looks of your code you seem to be using Bootstrap version 3 which has a built in feature to show or hide items based on your screen size which might help you. You can read more about that here.
Or you can just add your own media queries to remove the padding once the screen width hits a specific size. Maybe something like this:
/* Extra Small Devices, Phones */
#media only screen and (min-width : 480px) {
#content {
padding-left: 0;
}
}
If you want to see more about BS breakpoints you can look through this post here. Hope that helps.