html - Creating a Responsive input field between other elements -


having trouble getting search input act responsively in header.

in codepen have basic header, logo left, search bar in middle , navigation buttons on right. goal search / input bar in middle responsive , stretch fill space between logo , navigation buttons left/right margin.

in attempts haven't been able replicate basic reponsiveness of input @ bottom set 100%.

*how approach problem?*

http://codepen.io/leongaban/pen/wipav

my input:

<div class="navigation">  <div class="head-search">   input should responsive   <input class="txtinput" type="text"/>     <img src="http://leongaban.com/_stack/images/search_button.png" alt="search"/> </div>  <nav id="user-actions">     <ul>         <li class="btn-blue user-action" data-btn="login" data-pane="login">log in</li>         <li class="btn-purple user-action" data-btn="signup" data-pane="signup">sign up</li>     </ul> </nav> 

.navigation {     width: auto; float:right; margin:0px; list-style:none; background:#ccc;     margin-bottom:20px; } .head-search {     width: auto;     float: left; }  .head-search input {     float: left;     width: 100%;     /* max-width: 290px; */     height: 25px;     padding: 0 5px;     margin: 10px 5px 10px 0; }

any , tips appreciated!

if logo on left , navigation on right size have fixed can achieve responsive search bar following code:

e.g. logo width 150px , navigation width 400px

.navigation {     width: 100%;      margin:0px 0 20px ;      list-style:none;      background:#ccc;     width:100%; } .logo{     float:left;     width:150px; } .head-search {     position:relative;     margin: 0 400px 0 150px; }  .head-search input {     float: left;     width: 100%;     /* max-width: 290px; */     height: 25px;     padding: 0 5px;     margin: 10px 5px 10px 0; }  #user-actions{     width:400px;     float:right; }

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