A centred call-to-action above a four-tile countdown (days, hours, minutes, seconds) to a launch date. Each digit sits in its own window and rolls to the next value like an odometer, a CSS transform driven by a custom property, no @keyframes. A thin bar beneath shows how much of the wait has passed, and once the target time arrives the countdown tiles are swapped for a launched message, announced once through a polite live region. Section options: data-target (ISO datetime) the launch moment; data-start (ISO datetime) when the wait began, for the progress bar.