title: Center CSS menu
body: <p>How Can I center this menu css?</p>
  
  <p>Here the css:</p>
  
  <pre><code>@import url(http://fonts.googleapis.com/css?family=Open+Sans);
  #mainMenu,
  #mainMenu ul,
  #mainMenu ul li,
  #mainMenu ul li a,
  #mainMenu #menu-button {
    margin: 0;
    padding: 0;
    border: 0;
    list-style: none;
    line-height: 1;
    display: block;
    position: relative;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
  }
  #mainMenu:after,
  #mainMenu &gt; ul:after {
    content: ".";
    display: block;
    clear: both;
    visibility: hidden;
    line-height: 0;
    height: 0;
  }
  #mainMenu #menu-button {
    display: none;
  }
  #mainMenu {
    width: auto;
    font-family: 'Open Sans', sans-serif;
    line-height: 1;
    background: #eff1f3;
  }
  #menu-line {
    position: absolute;
    top: 0;
    left: 0;
    height: 3px;
    background: #009ae1;
    -webkit-transition: all 0.25s ease-out;
    -moz-transition: all 0.25s ease-out;
    -ms-transition: all 0.25s ease-out;
    -o-transition: all 0.25s ease-out;
    transition: all 0.25s ease-out;
  }
  #mainMenu &gt; ul &gt; li {
    float: left;
  }
  #mainMenu.align-center &gt; ul {
    font-size: 0;
    text-align: center;
  }
  #mainMenu.align-center &gt; ul &gt; li {
    display: inline-block;
    float: none;
  }
  #mainMenu.align-center ul ul {
    text-align: left;
  }
  #mainMenu.align-right &gt; ul &gt; li {
    float: right;
  }
  #mainMenu.align-right ul ul {
    text-align: right;
  }
  #mainMenu &gt; ul &gt; li &gt; a {
    padding: 20px;
    font-size: 12px;
    text-decoration: none;
    text-transform: uppercase;
    color: #000000;
    -webkit-transition: color .2s ease;
    -moz-transition: color .2s ease;
    -ms-transition: color .2s ease;
    -o-transition: color .2s ease;
    transition: color .2s ease;
  }
  #mainMenu &gt; ul &gt; li:hover &gt; a,
  #mainMenu &gt; ul &gt; li.active &gt; a {
    color: #009ae1;
  }
  #mainMenu &gt; ul &gt; li.has-sub &gt; a {
    padding-right: 25px;
  }
  #mainMenu &gt; ul &gt; li.has-sub &gt; a::after {
    position: absolute;
    top: 21px;
    right: 10px;
    width: 4px;
    height: 4px;
    border-bottom: 1px solid #000000;
    border-right: 1px solid #000000;
    content: "";
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    transform: rotate(45deg);
    -webkit-transition: border-color 0.2s ease;
    -moz-transition: border-color 0.2s ease;
    -ms-transition: border-color 0.2s ease;
    -o-transition: border-color 0.2s ease;
    transition: border-color 0.2s ease;
  }
  #mainMenu &gt; ul &gt; li.has-sub:hover &gt; a::after {
    border-color: #009ae1;
  }
  #mainMenu ul ul {
    position: absolute;
    left: -9999px;
  }
  #mainMenu li:hover &gt; ul {
    left: auto;
  }
  #mainMenu.align-right li:hover &gt; ul {
    right: 0;
  }
  #mainMenu ul ul ul {
    margin-left: 100%;
    top: 0;
  }
  #mainMenu.align-right ul ul ul {
    margin-left: 0;
    margin-right: 100%;
  }
  #mainMenu ul ul li {
    height: 0;
    -webkit-transition: height .2s ease;
    -moz-transition: height .2s ease;
    -ms-transition: height .2s ease;
    -o-transition: height .2s ease;
    transition: height .2s ease;
  }
  #mainMenu ul li:hover &gt; ul &gt; li {
    height: 32px;
  }
  #mainMenu ul ul li a {
    padding: 10px 20px;
    width: 160px;
    font-size: 12px;
    background: #333333;
    text-decoration: none;
    color: #dddddd;
    -webkit-transition: color .2s ease;
    -moz-transition: color .2s ease;
    -ms-transition: color .2s ease;
    -o-transition: color .2s ease;
    transition: color .2s ease;
  }
  #mainMenu ul ul li:hover &gt; a,
  #mainMenu ul ul li a:hover {
    color: #ffffff;
  }
  #mainMenu ul ul li.has-sub &gt; a::after {
    position: absolute;
    top: 13px;
    right: 10px;
    width: 4px;
    height: 4px;
    border-bottom: 1px solid #dddddd;
    border-right: 1px solid #dddddd;
    content: "";
    -webkit-transform: rotate(-45deg);
    -moz-transform: rotate(-45deg);
    -ms-transform: rotate(-45deg);
    -o-transform: rotate(-45deg);
    transform: rotate(-45deg);
    -webkit-transition: border-color 0.2s ease;
    -moz-transition: border-color 0.2s ease;
    -ms-transition: border-color 0.2s ease;
    -o-transition: border-color 0.2s ease;
    transition: border-color 0.2s ease;
  }
  #mainMenu.align-right ul ul li.has-sub &gt; a::after {
    right: auto;
    left: 10px;
    border-bottom: 0;
    border-right: 0;
    border-top: 1px solid #dddddd;
    border-left: 1px solid #dddddd;
  }
  #mainMenu ul ul li.has-sub:hover &gt; a::after {
    border-color: #ffffff;
  }
  @media all and (max-width: 768px), only screen and (-webkit-min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min--moz-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (-o-min-device-pixel-ratio: 2/1) and (max-width: 1024px), only screen and (min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min-resolution: 192dpi) and (max-width: 1024px), only screen and (min-resolution: 2dppx) and (max-width: 1024px) {
    #mainMenu {
      width: 100%;
    }
    #mainMenu ul {
      width: 100%;
      display: none;
    }
    #mainMenu.align-center &gt; ul,
    #mainMenu.align-right ul ul {
      text-align: left;
    }
    #mainMenu ul li,
    #mainMenu ul ul li,
    #mainMenu ul li:hover &gt; ul &gt; li {
      width: 100%;
      height: auto;
      border-top: 1px solid rgba(120, 120, 120, 0.15);
    }
    #mainMenu ul li a,
    #mainMenu ul ul li a {
      width: 100%;
    }
    #mainMenu &gt; ul &gt; li,
    #mainMenu.align-center &gt; ul &gt; li,
    #mainMenu.align-right &gt; ul &gt; li {
      float: none;
      display: block;
    }
    #mainMenu ul ul li a {
      padding: 20px 20px 20px 30px;
      font-size: 12px;
      color: #000000;
      background: none;
    }
    #mainMenu ul ul li:hover &gt; a,
    #mainMenu ul ul li a:hover {
      color: #000000;
    }
    #mainMenu ul ul ul li a {
      padding-left: 40px;
    }
    #mainMenu ul ul,
    #mainMenu ul ul ul {
      position: relative;
      left: 0;
      right: auto;
      width: 100%;
      margin: 0;
    }
    #mainMenu &gt; ul &gt; li.has-sub &gt; a::after,
    #mainMenu ul ul li.has-sub &gt; a::after {
      display: none;
    }
    #menu-line {
      display: none;
    }
    #mainMenu #menu-button {
      display: block;
      padding: 20px;
      color: #000000;
      cursor: pointer;
      font-size: 12px;
      text-transform: uppercase;
    }
    #mainMenu #menu-button::after {
      content: '';
      position: absolute;
      top: 20px;
      right: 20px;
      display: block;
      width: 15px;
      height: 2px;
      background: #000000;
    }
    #mainMenu #menu-button::before {
      content: '';
      position: absolute;
      top: 25px;
      right: 20px;
      display: block;
      width: 15px;
      height: 3px;
      border-top: 2px solid #000000;
      border-bottom: 2px solid #000000;
    }
    #mainMenu .submenu-button {
      position: absolute;
      z-index: 10;
      right: 0;
      top: 0;
      display: block;
      border-left: 1px solid rgba(120, 120, 120, 0.15);
      height: 52px;
      width: 52px;
      cursor: pointer;
    }
    #mainMenu .submenu-button::after {
      content: '';
      position: absolute;
      top: 21px;
      left: 26px;
      display: block;
      width: 1px;
      height: 11px;
      background: #000000;
      z-index: 99;
    }
    #mainMenu .submenu-button::before {
      content: '';
      position: absolute;
      left: 21px;
      top: 26px;
      display: block;
      width: 11px;
      height: 1px;
      background: #000000;
      z-index: 99;
    }
    #mainMenu .submenu-button.submenu-opened:after {
      display: none;
    }
  }
  </code></pre>
  
  <p>Here you have the html</p>
  
  <pre><code>&lt;div id='mainMenu'&gt;
  &lt;ul&gt;
    &lt;li&gt;&lt;a href='#'&gt;Home&lt;/a&gt;&lt;/li&gt;
    &lt;li class='active has-sub'&gt;&lt;a href='#'&gt;Products&lt;/a&gt;
      &lt;ul&gt;
        &lt;li class='has-sub'&gt;&lt;a href='#'&gt;Product 1&lt;/a&gt;
          &lt;ul&gt;
            &lt;li&gt;&lt;a href='#'&gt;Sub Product&lt;/a&gt;&lt;/li&gt;
            &lt;li&gt;&lt;a href='#'&gt;Sub Product&lt;/a&gt;&lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
        &lt;li class='has-sub'&gt;&lt;a href='#'&gt;Product 2&lt;/a&gt;
          &lt;ul&gt;
            &lt;li&gt;&lt;a href='#'&gt;Sub Product&lt;/a&gt;&lt;/li&gt;
            &lt;li&gt;&lt;a href='#'&gt;Sub Product&lt;/a&gt;&lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
      &lt;/ul&gt;
    &lt;/li&gt;
    &lt;li&gt;&lt;a href='#'&gt;About&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href='#'&gt;Contact&lt;/a&gt;&lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p></p>
  
  <p>Please help me. I really appreciate. I know it should not be really hard. Has been a long time since I don't develop nothing and my skills are still sleeping LOL. I was trying and reseraching but I did not find nothing that works. Thanks!!!</p>