.portfolio-section {
    padding-bottom:40px;
}


/* category filter */

ul.filter > li > a {
    line-height:40px
}

ul.filter > li > a:hover,ul.filter > li > a:focus {
    text-decoration:none;
    outline:none
}

ul.filter > li.active a {
    color:#111;
    font-weight: bolder;
}

ul.filter > li span {
    color:#ddd;
    font-size:20px;
    display:inline-block;
    margin:0 5px
}

/* the color of the transparent overlay border */

.portfolio-section.port-col figure .overlay-background {
    background-color:#000;
    background-color:rgba(0,0,0,0.4);
}


/* portfolio images */

.portfolio-section figure {
    float:left;
    width:100%;
    position:relative;
    margin-bottom: 20px;
}

.portfolio-section figure img {
    width:100%;
    height:auto
}


/* project title under image */

.portfolio-section .article-title {
    float:left;
    width:100%;
    font-size:18px;
    line-height:24px;
    padding:10px 0 30px 0;
}

.portfolio-section .article-title a {
    color:#aaa
}


/* transparent overlay */

.portfolio-section figure:hover .overlay {
    opacity:1;
    visibility:visible
}

.portfolio-section figure:hover .overlay-background {
    opacity:.8;
    visibility:visible
}

.portfolio-section figure .overlay-background {
    z-index:1;
    -webkit-transition:all .2s ease-in-out;
    -moz-transition:all .2s ease-in-out;
    -o-transition:all .2s ease-in-out;
    transition:all .2s ease-in-out;
    position:absolute;
    top:0;
    left:0;
    opacity:0;
    visibility:hidden;
    width:100%;
    height:100%
}

.portfolio-section figure .overlay-background .inner {
    position:absolute;
    left:0;
    right:0;
    bottom:0;
    top:0;
    margin:11px;
/*    background-color:#c8e9c8;
    background-color:rgba(194,231,194,0.9)
*/
    background-color: rgba(0,0,0,0.9);
}

.portfolio-section figure .overlay {
    z-index:2;
    transition:all .2s ease-in-out;
    position:absolute;
    top:0;
    left:0;
    opacity:0;
    visibility:hidden;
    width:100%;
    height:100%
}

.portfolio-section figure .inner-overlay {
    display:table;
    width:100%;
    height:100%
}

.portfolio-section figure .inner-overlay-content {
    display:table-cell;
    vertical-align:middle;
    width:100%;
    padding:20px 40px
}

.portfolio-section figure .inner-overlay-content {
    text-align:center
}


/* icons inside overlay */
.portfolio-section figure .inner-overlay-content .article-title {
    display:inline-block;
    margin:0 10px;
    text-decoration:none;
    font-size:20px;
    /*background:rgba(0,0,0,0.9);*/
    color:#fff;
    border-radius:0
}
.portfolio-section figure .inner-overlay-content .article-subtitle {
    color:#fff;
}
.portfolio-section figure .inner-overlay-content .with-icons a {
    width:40px;
    height:40px;
    line-height:42px;
}


/* skew image on hover */ 

.isotopeSelector img {
    /*
    -webkit-transition:all .4s ease;
    -moz-transition:all .4s ease;
    -ms-transition:all .4s ease;
    -o-transition:all .4s ease;
    transition:all .4s ease
    */
}

.isotopeSelector:hover img {
    -moz-transform:scale(1.5) rotate(0deg);
    -webkit-transform:scale(1.5) rotate(0deg);
    -o-transform:scale(1.5) rotate(0deg);
    -ms-transform:scale(1.5) rotate(0deg);
    transform:scale(1.5) rotate(0deg);
    -webkit-transition:all .8s ease;
    -moz-transition:all .8s ease;
    -ms-transition:all .8s ease;
    -o-transition:all .8s ease;
    transition:all .8s ease
}

.isotopeSelector:hover img.rotate {
    -moz-transform:scale(1.5) rotate(2deg);
    -webkit-transform:scale(1.5) rotate(2deg);
    -o-transform:scale(1.5) rotate(2deg);
    -ms-transform:scale(1.5) rotate(2deg);
    transform:scale(1.5) rotate(2deg);
    -webkit-transition:all .8s ease;
    -moz-transition:all .8s ease;
    -ms-transition:all .8s ease;
    -o-transition:all .8s ease;
    transition:all .8s ease
}

.isotopeSelector figure {
    overflow:hidden
}

.isotopeSelector figure {
    box-shadow:0 0 2px rgba(0,0,0,0.2)
}

.isotopeSelector-disabled
{
    pointer-events: none;
    opacity: 0.4;
}
.isotopeSelector-disabled img
{
    -webkit-filter: grayscale(100%); /* Safari 6.0 - 9.0 */
    filter: grayscale(100%);
}

button.btn-go-back
{
    border: medium none;
    color: #ffffff;
    font-size: 16px;
    margin: 15px 0;
    padding: 15px 30px;
    text-align: center;
    text-decoration: none;
    transition-duration: 0.4s;
    border-radius: 4px;
    display: inline-block;
}