/* Right-edge date scrubber. Idles invisible and fades in while scrolling, so it never
   competes with the memory on screen. */

.scrubber {
  position: fixed;
  top: calc(env(safe-area-inset-top) + 72px);
  right: 0;
  bottom: calc(var(--tray-h) + env(safe-area-inset-bottom) + 16px);
  width: 60px;
  z-index: 8;
  opacity: 0;
  transition: opacity 0.25s ease;
  /* Vertical drags belong to the scrubber, not the page, once one starts here */
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
}

.scrubber.is-active { opacity: 1; }

.scrubber[hidden] { display: none; }

/* The hairline the ticks hang off */
.scrubber::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: 13px;
  width: 2px;
  border-radius: 1px;
  background: var(--hairline);
}

.scrubber-ticks {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.scrubber-tick {
  position: absolute;
  right: 22px;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  /* At phone width the rail rides over the cards, so a label can land on any photo.
     Carry a scrap of the page background so it stays legible whatever is behind it. */
  padding: 1px 5px;
  border-radius: 6px;
  background: rgba(var(--bg-rgb), 0.85);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

/* Every tick also gets a dash on the rail itself */
.scrubber-tick::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -13px;
  width: 8px;
  height: 2px;
  border-radius: 1px;
  transform: translateY(-50%);
  background: var(--accent);
}

.scrubber-thumb {
  position: absolute;
  top: 0;
  right: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--blue-ink);
  box-shadow: 0 1px 4px rgba(46, 58, 48, 0.28);
  /* The transform positions it; this keeps it centred on its own fraction */
  margin-top: -6px;
  will-change: transform;
}

.scrubber-bubble {
  position: absolute;
  top: 0;
  right: 30px;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--blue-ink);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
  margin-top: -14px;
  opacity: 0;
  transition: opacity 0.18s ease;
  pointer-events: none;
  will-change: transform;
}

/* The bubble is only worth the space while you are actually dragging */
.scrubber.is-dragging .scrubber-bubble { opacity: 1; }

.scrubber.is-dragging .scrubber-thumb { transform-origin: center; }

@media (prefers-reduced-motion: reduce) {
  .scrubber { transition: none; }
}