Get rid of space between divs - CSS - css

Question

I have the following HTML code where the subnav div is a collection of div tags that will act as tabs across the featuredexhibit div. Problem is that there is a white space adding between the top of the featureexhibit div and bottom of the subnav tab.
HTML:
<div id="subnav">
<div id="subnavtab">Plan Your Visit</div>
<div id="subnavtab">Tour the Museum</div>
<div id="subnavtab">Program & Events</div>
<div id="subnavtab">Membership</div>
<div id="subnavtab">Donate</div>
</div>
<div id="featuredexhibit">
Featured Exhibit - this can be a rotating menu of exhibits
</div>
CSS:
#subnav { margin-top: 20px; width: 740px; display: inline-block; }
#featuredexhibit { width: 732px; height: 200px; background-color: #A7A9AC; margin: 0; }
#subnavtab { background-color: #A1CD3A; float: left; padding: 10px 10px 10px 10px; margin: 0 5px 0 0; display: inline-block; }
I have tried using the Chrome Developer Tools to find the issue but I do not have any luck or I do not know what to look for.

Answer 1

There doesn't seem to be any problem with your code.
Are you sure no other CSS is conflicting? Make sure the CSS tags you are using are from the last CSS added in the HTML.
For example,
<link rel="stylesheet" type="text/css" href="css-1.css">
<link rel="stylesheet" type="text/css" href="css-2.css">
If there are common tags in "css-2.css", then it will over ride any similar tags of "css-1.css"

Answer 2

You should give a float to the subnav and then clear the featuredexhibit and then only it couldn't save a space between them.
#subnav{float: left;}
#featuredexhibit{clear: both;}
See this Demo

Answer 3

I'm honestly not sure why the white space is there, but I got it fixed in Chrome by removing the inline-block and creating a clear both.
CSS
.subnav { margin-top: 20px; width: 740px; }
.featuredexhibit { width: 732px; height: 200px; background-color: #A7A9AC; margin: 0; }
.subnavtab { background-color: #A1CD3A; float: left; padding: 10px 10px 10px 10px; margin: 0 5px 0 0; }
.clear { clear: both; }
HTML
<div class="subnav">
<div class="subnavtab">Plan Your Visit</div>
<div class="subnavtab">Tour the Museum</div>
<div class="subnavtab">Program & Events</div>
<div class="subnavtab">Membership</div>
<div class="subnavtab">Donate</div>
<div class="clear"></div>
</div>
<div class="featuredexhibit">
Featured Exhibit - this can be a rotating menu of exhibits
</div>
jsFiddle: http://jsfiddle.net/vFFx5/

Answer 4

I know this is old, but since I just ran into this issue I might as well point future visitors to this article: https://css-tricks.com/fighting-the-space-between-inline-block-elements/
The problem seems to be that a new line counts as white space character in a row of inline-block elements. To solve this use floated blocks or flexbox.