h1, h2 {
    text-align: center;
}

#ListOfTickets {
    font-size: 20px;
}

.MainDiv {
    display: flex;
    justify-content: center;
}

.DivGrid {
    display: inline-grid;
    justify-content: center;
    border: solid red 3px;
    padding: 5px;
    min-width: 200px;
    width: auto;
    height: auto;
}