Новое решение CSS Basics

css.css

body,html
{
    width: 100%;

}
    .navigation
    {
        list-style: none;
        font-family: Helvetica,Verdana;
        font-weight: bold;
        font-size: 12px;
        width:100%;               
        margin:0;
        padding: 0;
        display: table;
        table-layout: fixed;
    }
    .navigation__button-wrapper
    {        
              
        
        display: table-cell;
    }

    .navigation__button
    {
        text-align: center;
        height: 30px;
        text-decoration: none;        
        background-color: #d3d3d3;
        line-height: 30px;
        color:#fefefe;
        display: block;

        margin-right: 12px;
    }

    .navigation__button:before
    {
        
        float: left;        
        content:"";
        
        margin-left: -10px;
        width: 0px;
        height: 0px;
        color:#d3d3d3;
        border-top: 15px solid;
        border-left: 10px solid transparent;        
        border-bottom: 15px solid;
    }

    .navigation__button:after
    {
        vertical-align: middle;   
        float: right;        
        content:"";
        
        margin-right: -10px;
        width: 0px;
        height: 0px;
        color:#d3d3d3;
        border-top: 15px solid transparent;
        border-left: 10px solid;
        border-bottom: 16px solid transparent;;
    }

    .navigation__button-wrapper:first-child .navigation__button
    {

        -moz-border-radius: 3px 0 0 3px; 
        -webkit-border-radius: 3px 0 0 3px; 
        -o-border-radius: 3px 0 0 3px; 
        -ms-border-radius: 3px 0 0 3px; 
        border-radius: 3px 0 0 3px;    
    }

    .navigation__button_last
    {
        border-right: none;
        -moz-border-radius: 0 3px 3px 0;
        -webkit-border-radius: 0 3px 3px 0;
        -o-border-radius: 0 3px 3px 0;
        -ms-border-radius: 0 3px 3px 0;
        border-radius: 0  3px 3px 0;            
    }
    
    .navigation__button-wrapper:first-child .navigation__button:before
    {
        content: none;
    }

    .navigation__button_last:after
    {
        content: none;
    }

    .navigation__button_complete
    {        
        color: #50b4ec;
        background-color: #c4eaf8;
    }
    .navigation__button_complete:after,.navigation__button_complete:before
    {
        color: #c4eaf8;
    }
    .navigation__button_active
    {
        background-color: #46a9e8;
    }

    .navigation__button_active:after,.navigation__button_active:before
    {
        color: #46a9e8;   
    }

html.html

<ul class="navigation">
    <li class="navigation__button-wrapper">
        <a href="#" class="navigation__button navigation__button_complete">More than one word</a>
    </li>
    <li class="navigation__button-wrapper">
        <a href="#" class="navigation__button navigation__button_complete">Link</a>
    </li>
    <li class="navigation__button-wrapper">
        <span class="navigation__button navigation__button_active">Link</span>
    </li>
    <li class="navigation__button-wrapper">
        <span class="navigation__button">Link</span>
    </li>
    <li class="navigation__button-wrapper">
        <span class="navigation__button navigation__button_last">Link</span>
    </li>
</ul>