.site-title {
    text-align: center;
}

.description p {
    text-align: center;
}

.main-input {
    display: flex;
}

#urlInput {
    flex: 1;
    padding: 0.5rem 0.5rem;
    text-align: center;
}

.operation-area {
    display: flex;
    justify-content: center;
    margin-top: 1rem;
}

#startBtn {
    font-size: large;
}