.my-container {
    height: calc(100vh - 70px);
}

.banner-container {
    width: 320px;
    height: 120px;
    margin: auto;
}

.banner-container-h50 {
    width: 320px;
    height:50px;
    margin: auto;
}

.chat-container {
    min-width: 320px;
    min-height: 100px;
}

.banner-container-long {
    width: 320px;
    height: 650px;
    margin: auto;
}