body {
            font-family: 'Lato', sans-serif;
        }

        .overlay {
            height: 100%;
            width: 0;
            position: fixed;
            z-index: 1;
            top: 0;
            left: 0;
            background-color: rgb(0,0,0);
            background-color: rgba(0,0,0, 0.9);
            overflow-x: hidden;
            transition: 0.5s;
        }

        .overlay-content {
            position: relative;
            top: 25%;
            width: 80%;
            text-align: center;
            margin-top: -180px;
        }

        .overlay a {
            padding: 8px;
            text-decoration: none;
            font-size: 36px;
            color: #818181;
            display: block;
            transition: 0.3s;
        }

            .overlay a:hover, .overlay a:focus {
                color: #f1f1f1;
            }

        .overlay .closebtn {
            position: absolute;
            top: 5px;
            right: 65px;
            font-size: 60px;
        }

        @media screen and (max-height: 450px) {
            .overlay a {
                font-size: 20px;
            }

            .overlay .closebtn {
                font-size: 40px;
                top: 15px;
                right: 35px;
            }
        }