.flex-main {
    max-width: 80%;
    margin-left: 10%;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.flex-container {
    position: relative;
    display: flex;
    flex: 1;
    flex-direction: column;
}

    .flex-container .flex-data {
        display: flex;
        flex: 1 0 auto;
        overflow: auto;
        flex-basis: 0;
        flex-direction: column;
        text-align: center;
    }

    .flex-container .flex-btn {
        display: flex;
    }