.row {
    display: flex;
    justify-content: center;
}
.ace_editor {
    min-width: 400px;
    min-height: 320px;
}
.footer {
    display: flex;
    justify-content: center;
    position: fixed;
    bottom: 0;
    width: 100%;
}

.output-area {
    min-width: 400px;
    min-height: 190px;
    resize: none;
}

.h4-title {
    color: #337ab7;
    font-weight: bold;
    font-size: 22px;
}