html - Navigation Submenu is not coming up -


i have created navigation menu sub menu. can please me find out why sub menu coming part of main menu?

navigation have options like: home, about, portfolio... portfolio have menu options: web development, motion...

issue: web development should have sub menu: bootstrap, css rather coming part of main menu.<div id="navigation"><ul class="navigation"><li><a href="#">home</a></li></ul>/div>

body {    background: #c4c7cb;    background-image: -webkit-radial-gradient(cover, #fff, #d1d1d1);    background-image: -moz-radial-gradient(cover, #e8eaec, #a4a8ae);    background-image: -o-radial-gradient(cover, #e8eaec, #a4a8ae);    background-image: radial-gradient(cover, #e8eaec, #a4a8ae)  }  html {    min-height: 100%;  }  .navigation {    height: 50px;    padding: 0;    margin: 0;    position: absolute;  }  .navigation li {    height: auto;    width: 150px;    float: left;    text-align: center;    list-style: none;    font: 12px"bonveno", "century gothic";    padding: 0;    margin: 0;    background-color: #eee;    border: 1px solid #ccc;    box-shadow: 0 1px 0 rgba(255, 255, 255, .9) inset, 0 1px 3px rgba(0, 0, 0, .1);    border-radius: 3px;    margin-left: 10px;  }  .navigation {    padding: 13px;    text-decoration: none;    color: #333;    text-shadow: 0 1px #fff;    display: block;  }  .navigation li ul {    display: none;    height: auto;    margin-left: -11px;    padding: 0;  }  .navigation li:hover ul {    display: block;  }  .navigation li:hover,  a:hover {    background: #e8e8e8;  }
<div id="navigation">    <ul class="navigation">      <li><a href="#">home</a>      </li>      <li><a href="#">about</a>      </li>      <li><a href="#">my portfolio</a>        <ul>          <li><a href="#">web development</a>            <ul>              <li><a href="#">bootstrap</a>              </li>              <li><a href="#">css</a>              </li>            </ul>          </li>          <li><a href="#">motion graphics</a>          </li>          <li><a href="#">flash animation</a>          </li>          <li><a href="#">logo design</a>          </li>          <li><a href="#">photography</a>          </li>        </ul>      </li>      <li><a href="#">services</a>      </li>      <li><a href="#">contact</a>      </li>    </ul>  </div>

it because have css rule .navigation li:hover ul { display: block; } believe want show second level menu on first level item hover. rule applying third level menu (that means ul under first level item hovers applied display: block;), may want use

.navigation li:hover > ul instead


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