Skype Chat Invite [htmlbook]

HTML

<a href="skype:?chat&blob=AQzpGQINhWEWoDv-0mPSd5jEYDdyml1tdcdjfnxSCaG1ZjwC-CsKPmAGMWH0SotwBLe-0mUTBzLWX0lwZATnKE6cCuaedsT9oysih5O9cldPNOzldW227s1nLaK3aFsM_zF_Vk62PwuOI0la5NcC-2LtmlcreCU1UF_Pz6BPGhLl8XXKOfXDDvWWnuNPrbyAjHfyZNCzonc7TqYbLz1dEG-Jaa0flunMVExxAPA" class="a">Тыцяй не боись :)</a>

CSS

html {
    background: #eee;
    width: 100%;
    font: 0.75em/1.5em "Segoe UI", Arial, "Helvetica CY", "Nimbus Sans L", sans-serif;
    display: table;
}
body {
    margin: 0;
    display: table-cell;
    text-align: center;
    vertical-align: middle;
}
html,
body {
    height: 100%;
}
.a {
    background: #ff670f;
    font-size: 3em;
    line-height: normal;
    color: #000;
    text-decoration: none;
    display: inline-block;
    padding: 15px 40px;
    border-radius: 3px;
    box-shadow: 1px 2px 3px rgba(0,0,0,.3);
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
.a:hover,
.a:active {
    background: #fd813a;
}
.a:active {
    box-shadow: inset 1px 2px 3px rgba(0,0,0,.3);
}