.parent {
position: relative;
}
.child {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}.class {
text-align: center;
}/* this will center all children within the parent element. */
.parent {
display: flex;
justify-content: center; /* horizontal */
align-items: center; /* vertical */
}.centered {
position: fixed;
top: 50%;
left: 50%;
/* bring your own prefixes */
transform: translate(-50%, -50%);
}