#thover {
    position: fixed;
    background: #000;
    width: 100%;
    height: 100%;
    opacity: .6
}

#tclose {
    position: absolute;
    background: black;
    color: white;
    right: -15px;
    top: -15px;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    font-size: 8px;
    font-weight: bold;
    font-family: 'Arial Black', Arial, sans-serif;
    cursor: pointer;
    box-shadow: 0 0 10px 0 #000;
}