html - margin-left and margin-right for Setting Center position -


i want set center .user-menu position, code below isn't working. how can solve this?

html

<body>     <div class="user-menu">         <div class="menu-items">             <div class="bought-tickects centered hover-effect"></div>             <label>تاریخچه خرید</label>         </div>         <div class="menu-items">             <div class="profile centered hover-effect"></div>             <label>حساب کاربری</label>         </div>         <div class=""></div>     </div>     <div class="clear"></div>     <div class="container-of-selected">     </div> </body>

css

* {     margin: 0px;     padding: 0px;     font-family: tahoma; }  .centered {     margin-left: auto;     margin-right: auto; }  .menu-items {     float: left;     height: 90px;     margin-left: 10px;     margin-right: 10px; }  .profile {     width: 72px;     height: 72px;     padding-left: 10px;     padding-right: 10px;     background-repeat: no-repeat;     background-position: center;     background-image: url('images/folder-contacts-icon.png');     border-radius: 5px; }  .bought-tickects {     width: 72px;     height: 72px;     padding-left: 10px;     padding-right: 10px;     background-repeat: no-repeat;     background-position: center;     background-image: url('images/tickets-icon.png');     border-radius: 5px; } .clear {     clear:both; } .user-menu {     margin-left:auto;     margin-right:auto; }

give .user-menu width, block element fill container. causes user-menu expand 100% width across page, technically centered, don't notice it.

.user-menu {     margin-left:auto;     margin-right:auto;     width: 100px; }

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