#echo_packet_window {
    font-size: 18px;
    visibility: hidden;
    position: absolute;
    left: calc(50% - 140px);
    top: -10px;
    background-color: #ddd;
    border-radius: 10px;
    border-style: solid;
    border-width: .5px;
    width: 280px;
    height: 240px;
	z-index: 999; 
}

#echo_packet_window > * {
	display: block;
    margin: 10px auto;
}

#echo_packet {
    margin: 10px auto;
    width: 100%;
    display: span;
}

#packet_holder {
    padding: 10px;
}

#packet_holder > *, #echo_header {
    text-align: center;
}