hover effect style : demo 26

                        .box{
                            position:relative;
                            overflow: hidden;
                        }
                        .box img{
                            width:100%;
                            height: auto;
                        }
                        .box .over-layer{
                            position: absolute;
                            top:0;
                            left:0;
                            width:100%;
                            height:100%;
                            background:rgba(0,0,0,0.7);
                            transform:translateY(-100%);
                            transition:all 0.50s linear;
                        }
                        .box:hover .over-layer{
                            transform:translateY(0);
                        }
                        .box .social-links{
                            padding:0;
                            margin:0;
                            list-style:none;
                            text-align:center;
                            position:relative;
                            top:45%;
                        }
                        .box .social-links li{
                            display:inline-block;
                            margin-right:10px;
                        }
                        .box .social-links li a{
                            border:1px solid #808080;
                            padding:8px;
                            color:#fff;
                            font-size:20px;
                        }
                        .box .social-links li a.fa-twitter:hover,
                        .box .social-links li a.fa-google:hover,
                        .box .social-links li a.fa-instagram:hover{
                            background: #15a8ba;
                            text-decoration:none;
                        }
                        .box .social-links li a.fa-google:hover{
                            background: #942e32;
                        }
                        .box .social-links li a.fa-instagram:hover{
                            background:#007bb6;
                        }
                        @media only screen and (max-width: 990px) {
                            .box{
                                margin-bottom:15px;
                            }
                        }