tabs

by PhilQ

HTML

<ul class="menu">
    <li>Pagina</li>
</ul>

CSS

@import url(http://fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,400,700);

* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
    -o-box-sizing: border-box;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
}

body {
    font-family: 'Open Sans', sans-serif;
    background-color: #dee0e4;
}

ul.menu {
    float: left;
    width: 100%;
    list-style: none;
    background-color: #1c1e22;
    z-index: -3;
    padding-top: 17px;
    height: 50px;
    box-shadow: inset 0px 0px 1px 2px rgba(0,0,0, 0.5)
}

ul.menu li {
    font-size: 14px;
    font-weight: normal;
    position: relative;
    float: left;
    z-index: 0;
    padding: 12px 17px 10px;
    margin: 0px 5px;
    height: 33px;
    text-shadow: 0px 1px 0px rgba(255,255,255, 0.8);
    overflow: hidden;
}

ul.menu li:after {
    content: "";
    z-index: -2;
    position: absolute;
    top: 6px;
    bottom: 0px;
    left: 5px;
    right: 5px;
    border-radius: 4px;
    border-bottom-left-radius: 0px;
    border-bottom-right-radius: 0px;
    bborder: 1px solid #ccc;
    background-color: #dee0e4;
    margin: -7px 0px -3px 0px;
    box-shadow: inset 1px 1px 0px 0px #fff, 0px 0px 1px 2px rgba(0,0,0, 0.5);
    -webkit-transform: perspective(100px) rotateX(40deg);
    -moz-transform: perspective(100px) rotateX(40deg);
    -o-transform: perspective(100px) rotateX(40deg);
    transform: perspective(100px) rotateX(40deg);
}