Drop Down Menu with Search Box in CSS3 and HTML

after click on options

very easy to edit the stylish menu. first go to blogger account and click on theme  /Template ↓↓

Click  on  and now find ]]></b:skin> then paste the following given CCS code just before ]]></b:skin>

  ↓↓

.nav {
 background: #232323;
 height: 60px;
 display: inline-block;
}

.nav li {
 float: left;
 list-style-type: none;
 position: relative;
}
.nav li a {
    font-size: 16px;
    color: white;
    display: block;
    line-height: 60px;
    padding: 0 26px;
    text-decoration: none;
    border-left: 1px solid #2e2e2e;
    font-family: Montserrat, sans-serif;
    text-shadow: 0 0 1px rgba(255, 255, 255, 0.5);
}
.nav li a:hover {
    background-color: #2e2e2e;
}
 
#settings a {
    padding: 18px;
    height: 24px;
    font-size: 10px;
    line-height: 24px;
}
#search {
    width: 357px;
    margin: 4px;
}
#search_text{
    width: 297px;
    padding: 15px 0 15px 20px;
    font-size: 16px;
    font-family: Montserrat, sans-serif;
    border: 0 none;
    height: 52px;
    margin-right: 0;
    color: white;
    outline: none;
    background: #1f7f5c;
    float: left;
    box-sizing: border-box;
    transition: all 0.15s;
}
::-webkit-input-placeholder { /* WebKit browsers */
    color: white;
}
:-moz-placeholder { /* Mozilla Firefox 4 to 18 */
    color: white;
}
::-moz-placeholder { /* Mozilla Firefox 19+ */
    color: white;
}
:-ms-input-placeholder { /* Internet Explorer 10+ */
    color: white;
}
#search_text:focus {
    background: rgb(64, 151, 119);
}
#search_button {
    border: 0 none;
    background: #1f7f5c url(https://3.bp.blogspot.com/-n7tsi6TpWC8/WSbIkatFqYI/AAAAAAAAAK0/IweqrUxKk1U_ysXGFLGQ_MVPl5uYoCGiQCLcB/s1600/search.png) center no-repeat;
    width: 60px;
    float: left;
    padding: 0;
    text-align: center;
    height: 52px;
    cursor: pointer;
}
#options a{
    border-left: 0 none;
}
#options>a {
    background-image: url(triangle.png);
    background-position: 85% center;
    background-repeat: no-repeat;
    padding-right: 42px;
}
.subnav {
    visibility: hidden;
    position: absolute;
    top: 110%;
    right: 0;
    width: 200px;
    height: auto;
    opacity: 0;
    transition: all 0.1s;
    background: #232323;
}
.subnav li {
    float: none;
}
.subnav li a {
    border-bottom: 1px solid #2e2e2e;
}
#options:hover .subnav {
    visibility: visible;
    top: 100%;
    opacity: 1;
}
@import url(http://fonts.googleapis.com/css?family=Montserrat);
 
* {
    margin: 0;
    padding: 0;
}

now again search for </header> teg and paste following Html code just below.

  ↓↓

<ul class="nav">
    <li id="settings">
        <a href="#"><img src="https://1.bp.blogspot.com/-jd8I18WFrj4/WScQRahHMvI/AAAAAAAAALY/6ySd6eC52SIpaJkg9Uin-m6Y_VEaauWhwCLcB/s1600/settings%2Bcopy.png" /></a></i>
    </li>
    <li> <a href="#"> Application</a>
    </li>
    <li>
        <a href="#">Board</a>
    </li>
    <li id="search">
        <form action="" method="get">
            <input type="text" name="search_text" id="search_text" placeholder="Search"/>
            <input type="button" name="search_button" id="search_button"></a>
        </form>
    </li>
    <li id="options">
        <a href="#">Options</a>
        <ul class="subnav">
            <li><a href="#">Settings</a></li>
            <li><a href="#">Application</a></li>
            <li><a href="#">Board</a></li>
            <li><a href="#">Options</a></li>
        </ul>
    </li>
</ul>
 
<script src="prefixfree-1.0.7.js" type="text/javascript"></script>

now click on Save Template. That's it

I hope you enjoyed this Awesome  Style Drop Down Menu With Search Box and the techniques I used. Please share this post if you like it