Vertically centre align and bottom align content in section

I have set up a full height section but I am also wanting to vertically centre the 'statement' image and then bottom align the small text however although it looks perfect on desktop the little text sits too high and isn't bottom aligned on larger screen sizes. 

https://seadragon-cello-c7j6.squarespace.com/

Password is: statement1

Try adding this to Design > Custom CSS

/* align text */
.fe-63c623f4ffddee3362ce86e7 {
    position: relative !important;
}
.fe-block-yui_3_17_2_1_1674453236707_6867 {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}