#portfolio {
    margin-top: 60px;
}

#portfolio #filters {
    list-style-type: none;
    height: 30px;
    margin-bottom: 40px;
    text-align: center;
    margin-top: -20px;
    padding-left: 0px;
}

#portfolio #filters li {
    display: inline-block;
    font-size: 20px;
    margin: 0px 6px;
}

#portfolio #filters li.separator {
    color: #c0c0c0;
    font-weight: lighter;
}

#portfolio #filters li a {
    color: #3f3f3f;
    // font-style: italic;
    -webkit-transition: color .2s;
    -moz-transition: color .2s;
    -ms-transition: color .2s;
    transition: color .2s;
}

#portfolio #filters li a:hover,
#portfolio #filters li a.active {
    color: #1189d9;
}

#portfolio #gallery_container {
    margin-bottom: 50px;
}

#portfolio #gallery_container .photo {
    width: 285px;
    margin: 5px;
    float: left;
    position: relative;
}

#portfolio #gallery_container .photo:hover .mask {
    display: block;
    opacity: 1;
    filter: alpha(opacity=100);
}

#portfolio #gallery_container .photo .mask {
    position: absolute;
    opacity: 0;
    filter: alpha(opacity=0);
    box-shadow: 0px 1px 6px 2px #b1b1b1;
    top: 0px;
    left: 0px;
    border-radius: 5px;
    height: 100%;
    padding: 0px 20px;
    width: 100%;
    background: rgba(17, 137, 217, 0.5);
    -webkit-transition: opacity .25s ease-in-out;
    -moz-transition: opacity .25s ease-in-out;
    transition: opacity .25s ease-in-out;
}

#portfolio #gallery_container .photo .mask h3 {
    color: #fff;
    font-size: 22px;
    position: relative;
    top: 39%;
}

#portfolio #gallery_container .photo .mask small {
    color: #f0f0f0;
    font-size: 15px;
    font-style: italic;
    position: relative;
    top: 35%;
    display: block;
}

#portfolio #gallery_container .photo .mask .more {
    color: #fff;
    font-size: 30px;
    font-weight: bold;
    position: absolute;
    bottom: 7%;
    left: 47%;
}


/* Responsive
-------------------------------------------------- */
@media(max-width: 990px) {
    #gallery_container {
        width: 600px;
        margin: 0 auto;
    }
}


@media (max-width: 767px) {
    #portfolio #gallery_container .photo .mask {
        opacity: 1;
    }
}

@media(max-width: 669px) {
    #gallery_container {
        width: 285px;
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    #portfolio #filters li {
        margin: 0px 4px;
    }
    #portfolio #filters li a {
        font-size: 18px;
    }
    #portfolio #gallery_container .photo {
        // margin-left: 35px;
        width: 100%;
    }
    #portfolio #gallery_container .photo img {
        left: 10%;
        width: 100%;
    }
}