body {
    background: #333;
    color: #fff;
    text-align: center;
    padding-top: 100px;
}
body h1 {
    margin-bottom: 50px;
}

#meeting-elem {
    min-width: 600px;
    min-height: 400px;
}

._row {
    display: flex;
    justify-content: center;
    align-items: center;
}
._row ._col {
    padding: 10px;
    border: 1px solid #fff;
    border-radius: 5px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 300px;
    margin: 10px;
}

._row ._col form {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}
._row ._col form input {
    width: 200px;
    padding: 5px 10px;
    color: #222;
}
._row ._col form input[type="submit"] {
    background: #222;
    border: none;
    outline: none;
    margin-top: 5px;
    color: #fff;
}
._row ._col form input[type="submit"]:hover {
    background: #555;
}