.btn{display: inline-block; padding: 3px 8px; font-size: 14px; color: #fff; border: 2px solid #4d92d9; background-color: #4d92d9; text-decoration: none; transition: 0.4s;}
.btn:hover{background-color: #4d92d9; color: #4d92d9; transition: 0.4s;}
.text-desc{position: absolute; left: 0; top: 0; background-color: #fff; height: 100%; opacity: 0; width: 100%; padding: 20px;}
.port-1{float: left; width: 100%; position: relative; overflow: hidden; text-align: center; }
.port-1 .text-desc{opacity: 0.9; top: -100%; transition: 0.5s; color: #000; padding: 45px 20px 20px;}
.port-1 img{transition: 0.5s;}
.port-1:hover img{transform: scale(1.2);}
.port-1.effect-1:hover .text-desc{top: 0;}
.port-1.effect-2 .text-desc{top: auto; bottom: -100%;}
.port-1.effect-2:hover .text-desc{bottom: 0;}
.port-1.effect-3 .text-desc{top: 50%; left: 50%; width: 0; height: 0; overflow: hidden; padding: 0;}
.port-1.effect-3:hover .text-desc{width: 100%; top: 0; left: 0; height: 100%; padding: 45px 20px 20px;}