Answers for "how to align in center using css"

center with css

.parent {
  position: relative;
}
.child {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

center in css

.centre {
    display: flex;
    flex-direction: column;
    align-items: center;
    /* it center the item vertically */
    justify-content: center;
    /* it center the item horizontally */
}