clock" aria-hidden="true"></i>
                <span>Analog</span>
            </button>
            <button class="tab-btn" data-tab="digital-clock" aria-selected="false" aria-controls="digital-clock">
                <i class="fas fa-digital-tachograph" aria-hidden="true"></i>
                <span>Digital</span>
            </button>
            <button class="tab-btn" data-tab="stopwatch" aria-selected="false" aria-controls="stopwatch">
                <i class="fas fa-stopwatch" aria-hidden="true"></i>