/* wisp-chart-book.css — shared chart-chapter styles. Loaded by
   book.toml's `additional-css`. Keep this file *small* — global
   utilities only, no per-chapter overrides. */

/* ── Replay animation button ───────────────────────────────────
   Each chart chapter has a `<button class="replay-btn">` that
   refreshes the iframe to restart the animation. The button must
   render legibly on every mdbook theme (light / rust / coal /
   navy / ayu) and on whatever the host page colour-scheme is. We
   ship one high-contrast dark style with explicit overrides for
   mdbook's light themes. */
.replay-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.95rem;
  border: 1px solid rgba(140, 150, 170, 0.45);
  background: linear-gradient(180deg, #2f3542 0%, #1f242e 100%);
  color: #f5f7fa;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  border-radius: 6px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.05) inset,
    0 1px 2px rgba(0, 0, 0, 0.25);
  transition:
    background 120ms ease,
    border-color 120ms ease,
    transform 80ms ease,
    box-shadow 120ms ease;
}

.replay-btn:hover {
  background: linear-gradient(180deg, #3a4150 0%, #292f3a 100%);
  border-color: rgba(190, 200, 220, 0.7);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.07) inset,
    0 2px 6px rgba(0, 0, 0, 0.3);
}

.replay-btn:active {
  transform: translateY(1px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2) inset;
}

.replay-btn:focus-visible {
  outline: 2px solid #5e9cff;
  outline-offset: 2px;
}

.replay-btn .replay-icon {
  font-size: 1.05em;
  line-height: 1;
}

/* mdBook light themes — keep a high-contrast dark button instead
   of inverting (the dark capsule reads as a deliberate "do this"
   affordance against either background). */
.light .replay-btn,
.rust .replay-btn {
  background: linear-gradient(180deg, #303644 0%, #1f242e 100%);
  color: #ffffff;
  border-color: rgba(100, 110, 130, 0.5);
}

.light .replay-btn:hover,
.rust .replay-btn:hover {
  background: linear-gradient(180deg, #3a4150 0%, #292f3a 100%);
}

/* Inline source-citation link beside the replay button. */
.replay-source-link {
  margin-left: 0.85rem;
  font-size: 0.9rem;
  opacity: 0.85;
}

.replay-source-link:hover {
  opacity: 1;
}