Which CSS property is used to horizontally center text?

.container {
    width: 400px;
    margin: 0 auto;
}

What does margin: 0 auto do?

.parent {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
}

What does this CSS do?

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

Why is transform: translate(-50%, -50%) needed?

Which property is used to vertically align text within an inline-block element?