 <div class="time-group">
            <div class="time-label">Current Time:</div>
            <div class="timestamp" id="timestamp"></div>
          </div>
          <div class="time-group">
            <div class="time-label">Last Reading:</div>
            <div class="last-updated" id="last-updated"></div>
          </div>
          <div class="time-group">
            <div class="time-label">Next Update:</div>
            <div class="countdown" id="countdown">60s</div>
            <button class="refresh-