.layout_Border2 {
    display: flex;
    flex-direction: column;
}
.layout_Border2 > .body {
    margin: 0;
    padding: 0;
    display: flex;
    flex-flow: row;
}

.layout_Border2 > .body > .center {
    flex: 1;
}

.layout_Border2 > .header {
    display: block;
}

.layout_Border2 > .footer {
    display: block;
}