.overlay {
    height: 0%;
    width: 100%;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background: rgb(227,62,37);
    background: linear-gradient(180deg, rgba(227,62,37,0.9) 81%, rgba(244,134,47,0.9) 100%);
    overflow-y: auto;
    transition: 0.5s;
}

.overlay-content {
    position: relative;
    top: 10%;
    width: 100%;
    text-align: left;
    margin-top: 0px;
}

.overlay a {
    padding: 8px;
    padding-left: 15px;
    text-decoration: none;
    font-size: 16px;
    color: #f1f1f1;
    display: block;
    transition: 0.3s;
    border-bottom: 1px solid rgba(244,134,47,0.9);
}

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

.overlay .closebtn {
    font-size: 30px;
    border-top: 2px solid #f1f1f1;
}