.activity_start_container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.head_row {
    display: flex;
    flex-direction: column;
}

.head_row_prev {
    margin-bottom: 10px;
    margin-right: 10px;
}

.activity_form_container {
    width: 600px;
    margin-top: 20px;
}

.common_form_row {
    display: flex;
    align-items: center;
}