.header-img {
    background-image: url('obrazek.jpg');

}

.header-text {

    top: 20%;

}



.tile {
    position: relative;
    display: block;
   
    width: auto; /* nadpisuje width:33.3% gdy jest */
    min-height: 200px;
    border-radius: 14px;
    overflow: hidden;
    transition: 
        flex-basis 1s ease,
        transform 5s ease,
        box-shadow 5s ease;
    box-shadow: 0 6px 18px rgba(0,0,0,.08);
}