/* Shared terminal scrollbar, separated from pointer presentation. */
html { scrollbar-width: none; }
::-webkit-scrollbar { width: 0; height: 0; display: none; }

.asb--rail {
  position: fixed;
  top: 60px;
  bottom: 40px;
  right: 4px;
  width: 24px;
  z-index: 40;
  cursor: none;
  user-select: none;
  touch-action: none;
}
.asb--rail.is-void { opacity: 0; pointer-events: none; }
.asb__col {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}
.asb__cell {
  --asb-cell: 13px;   /* ASCII ramp cell: leading must equal cell height */
  width: 100%;
  height: var(--asb-cell);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--shadow);
  font-family: var(--ff-mono);
  font-size: var(--fs-small);
  line-height: var(--asb-cell);
  text-align: center;
  transition: color 120ms linear, text-shadow 120ms linear, opacity 120ms linear;
}
.asb__cell[data-state="faint"] { color: var(--shadow); opacity: 0.5; }
.asb__cell[data-state="thumb"] { color: var(--ash); }
.asb__cell[data-state="thumb-dim"] { color: var(--ghost); }
.asb--rail.is-hot .asb__cell[data-state="thumb"] {
  color: var(--signal);
  text-shadow: 0 0 10px var(--signal-glow);
}
.asb--rail.is-hot .asb__cell[data-state="thumb-dim"] { color: var(--signal-dim); }
.asb--rail.is-hot .asb__cell[data-state="faint"] { color: var(--ghost); opacity: 0.7; }

.asb--rail::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 50%;
  width: 1px;
  background: var(--hairline);
  opacity: 0;
  transform: translateX(-50%);
  transition: opacity 150ms;
}
.asb--rail.is-hot::after { opacity: 0.4; }

.asb__tag {
  position: absolute;
  right: 100%;
  margin-right: 11px;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  color: var(--ghost);
  font-family: var(--ff-mono);
  white-space: nowrap;
  pointer-events: none;
  text-align: right;
  opacity: 0;
  transition: opacity 160ms;
}
.asb--rail.is-hot .asb__tag { opacity: 1; }
.asb__tag b {
  color: var(--signal);
  font-weight: 500;
  font-size: var(--fs-small);
  letter-spacing: var(--tr-wide);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.asb__tag span {
  color: var(--ghost);
  font-size: var(--fs-nano);
  letter-spacing: var(--tr-caps);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

@media (pointer: coarse) {
  .asb--rail { display: none; }
  html { scrollbar-width: auto; }
}