.fullw {
    width: 100%;
}

.fullh {
    height: 100vh;
}

.flexcenter {
    display: flex;
    justify-content: center;
    align-items: center;
}

.abstop {
    position: absolute; top: 0; left: 0;
}

.absbot {
    position: absolute; bottom: 0; left: 0;
}