/* Time-flow button (src/ui/time-flow.js). Bottom right, the same night glass as the tool bar.
   Where the bottom-center tool bar leaves no room beside it (a narrow window), the button stacks just
   above the bar at the right edge. */

.ebb-time {
  --tf-btn: 48px;
  --tf-icon: 28px;
  --tf-state: 26px;
  /* Tool bar height: button + 2 x 6 px padding + 2 x 1 px border (tools.css). */
  --tf-bar: calc(var(--tf-btn) + 14px);
  --tf-edge: 12px;

  position: fixed;
  right: max(var(--tf-edge), env(safe-area-inset-right));
  bottom: max(var(--tf-edge), env(safe-area-inset-bottom));
  z-index: 10;
  pointer-events: none;
  transition: opacity 200ms ease, transform 220ms ease, visibility 0s;
}

.ebb-time__btn {
  appearance: none;
  -webkit-appearance: none;
  pointer-events: auto;
  height: var(--tf-btn);
  min-width: var(--tf-btn);
  margin: 0;
  padding: 0 12px 0 10px;
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(30, 38, 36, 0.72);
  border: 1px solid rgba(244, 238, 228, 0.12);
  border-radius: 16px;
  box-shadow: 0 6px 24px rgba(10, 14, 13, 0.28);
  color: var(--ui-cream);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 160ms ease;
}
@media (pointer: fine) {
  .ebb-time__btn { -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
}
.ebb-time__btn:hover { background: rgba(48, 58, 55, 0.8); }
.ebb-time__btn:focus-visible {
  outline: 2px solid var(--wordmark-dark);
  outline-offset: 2px;
}
.ebb-time__btn[data-flow='0'] .ebb-time__state { color: var(--wordmark-dark); }

.ebb-time .icon { display: block; flex: none; }
.ebb-time__icon { width: var(--tf-icon); height: var(--tf-icon); }
.ebb-time__state {
  width: var(--tf-state);
  height: var(--tf-state);
  display: grid;
  place-items: center;
  flex: none;
}
.ebb-time__pips { width: var(--tf-state); height: var(--tf-state); }

/* Narrow windows: no room beside the centered bar, so sit just above it at the right edge.
   The brush card opens full width over that spot, so the button steps aside while a tool is on. */
@media (max-width: 560px) {
  .ebb-time { bottom: calc(max(var(--tf-edge), env(safe-area-inset-bottom)) + var(--tf-bar) + 10px); }
  .ebb-time.has-tool {
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 200ms ease, transform 220ms ease, visibility 0s linear 220ms;
  }
  .ebb-time.has-tool .ebb-time__btn { pointer-events: none; }
}

/* Reduced motion: the system's (unless Settings says Full), or Settings' Calm (src/ui/motion.js). */
@media (prefers-reduced-motion: reduce) {
  :root:not(.ebb-motion-full) .ebb-time,
  :root:not(.ebb-motion-full) .ebb-time.has-tool { transform: none; }
}
:root.ebb-motion-calm .ebb-time,
:root.ebb-motion-calm .ebb-time.has-tool { transform: none; }