.gpx-map {
    width: 100% !important;
    height: 420px !important;
    min-height: 420px !important;
    margin: 8px 0;
    display: block;
    clear: both;
    box-sizing: border-box;
    position: relative;
}

.inline-attachment .gpx-map {
    width: 100% !important;
    min-width: 100% !important;
}
.inline-attachment {
    display: block;
    width: 100% !important;
}
.attachbox .gpx-map,
.postbody .gpx-map {
    width: 100% !important;
    max-width: 100% !important;
}