Top, Right, Bottom & Left

The Top, Right, Bottom & Left CSS property participates in specifying position of a positioned element.

For responsive

add -sm, -md, -lg or -xl to class name, for example:

<div class="t0-md t50%-xl"></div>

.t0 {
    top: 0;
}
.r0 {
    right: 0;
}
.b0 {
    bottom: 0;
}
.l0 {
    left: 0;
}
.t50\% {
    top: 50%;
}
.l50\% {
    left: 50%;
}