header {
    text-align:center;
}
main {
    margin-top:10px;
}



.nav-justified {
    background-color: #eee;
    border: 1px solid #ccc;
    border-radius: 5px;
}
.nav-justified > li > a > img {
    width:40px;
    height:40px;
    margin-right:5px;
}
.nav-justified > li > a {
    padding-top: 15px;
    padding-bottom: 15px;
    margin-bottom: 0;
    font-weight: bold;
    color: #777;
    text-align: center;
    background-color: #e5e5e5; /* Old browsers */
    background-image: -webkit-gradient(linear, left top, left bottom, from(#f5f5f5), to(#e5e5e5));
    background-image: -webkit-linear-gradient(top, #f5f5f5 0%, #e5e5e5 100%);
    background-image:      -o-linear-gradient(top, #f5f5f5 0%, #e5e5e5 100%);
    background-image:         linear-gradient(to bottom, #f5f5f5 0%,#e5e5e5 100%);
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#f5f5f5', endColorstr='#e5e5e5',GradientType=0 ); /* IE6-9 */
    background-repeat: repeat-x; /* Repeat the gradient */
    border-bottom: 1px solid #d5d5d5;
}
.nav-justified > .active > a,
.nav-justified > .active > a:hover,
.nav-justified > .active > a:focus {
    background-color: #ddd;
    background-image: none;
    -webkit-box-shadow: inset 0 3px 7px rgba(0,0,0,.15);
    box-shadow: inset 0 3px 7px rgba(0,0,0,.15);
}
.nav-justified > li:first-child > a {
    border-radius: 5px 5px 0 0;
}
.nav-justified > li:last-child > a {
    border-bottom: 0;
    border-radius: 0 0 5px 5px;
}