body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20px;
    padding: 0 20px 30px 0;
    line-height: 1.4;
}

.flex-container {
    display: flex;
    flex-wrap: nowrap;
    width: 100%;
    height: 400px;
    justify-content: center;
    align-items: flex-end; /* Aligns bars from the bottom */
    transition: 2s all ease;
}

.flex-item {
    background: cyan;
    border: 1pt solid #000;
    width: 10px;
    transition: 0.1s all ease;
}

#input {
    display: flex;
    padding: 10px;
    justify-content: space-around;
}

.h1,
h1 {
    margin-bottom: 20px;
}

@media screen and (max-width: 600px) {
    .col #input {
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .col span {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: 10px;
    }

    .row {
        display: inline;
        text-align: center;
    }

    .flex-container {
        margin-top: 0;
    }

    #input {
        display: inline;
        text-align: center;
    }

    .justify-content-end {
        margin-top: 0;
    }

    .btn {
        margin-bottom: 10px;
    }
}