.navbar-nav {
    float:none;
    margin:0 auto;
    display: block;
    text-align: center;
}

.navbar-nav > li {
    display: inline-block;
    float:none;
}



.gallery-title
{
    font-size: 36px;
    color: #000000;
    text-align: center;
    font-weight: 500;
    margin-bottom: 70px;
}

.filter-button
{
    font-size: 18px;
    border: 1px solid #000000;
    border-radius: 5px;
    text-align: center;
    color: #000000;
    margin-bottom: 30px;

}
.filter-button:hover
{
    font-size: 18px;
    border: 1px solid #000000;
    border-radius: 5px;
    text-align: center;
    color: #ffffff;
    background-color: #000000;

}
.btn-default:active .filter-button:active
{
    background-color: #000000;
    color: white;
}

.port-image
{
    width: 100%;
}

.gallery_product
{
    margin-bottom: 30px;
}

.main_text 
{
    font-size: 20px;
}