html,
body {
  margin: 0;
  background-color: #ffffff;
}

#ribbon-stage {
  position: fixed;
  inset: 0;
}

#ribbon-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* scroll length that drives the timeline: the ribbon's whole run, top row to bottom row, is stretched over it */
#scroll-track {
  height: 95700vh;
}

/* PROTOTYPE — floating bar for switching entrance variants */
#variant-switcher {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 16px;
  background-color: #111111;
  color: #ffffff;
  font-family: system-ui, sans-serif;
  font-size: 14px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.switch-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

#variant-switcher[hidden] {
  display: none;
}

#variant-switcher button {
  border: 0;
  border-radius: 999px;
  padding: 4px 10px;
  background-color: #333333;
  color: #ffffff;
  font-size: 16px;
  cursor: pointer;
}