* {
    padding: 0;
    margin: 0;
    direction: rtl;
}

.all {
    width: 100%;
    height: 200vh;
    background: black;
}

.topbar {
    width: 100%;
    height: 120px;
    background: lightgray;
    display: flex;
    justify-content: center;
    align-items: center;
}