/* Lesson TTS — play control for study-hub lesson copy.
   Tokens fall back so a hub can override via --navy / --teal / --card / --line / --ink. */

.lt-host {
  position: relative;
  padding-right: 5.2rem;
}

.lt-cluster {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  z-index: 3;
  display: flex;
  gap: 0.25rem;
  align-items: center;
}

.lt-btn {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  border: 1px solid var(--line, #e4ddd2);
  background: var(--card, #fffdf8);
  color: var(--navy, #1a365d);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: 0 1px 2px rgba(26, 39, 68, 0.08);
}
.lt-btn:hover { border-color: var(--teal, #2c7a7b); }
.lt-btn[disabled] { opacity: 0.45; cursor: default; }
.lt-btn.is-on {
  background: var(--teal, #2c7a7b);
  border-color: var(--teal, #2c7a7b);
  color: #fff;
}
.lt-btn svg { width: 1.05rem; height: 1.05rem; display: block; }

.lt-btn.is-wait .lt-icon { display: none; }
.lt-spin {
  display: none;
  width: 0.9rem;
  height: 0.9rem;
  border: 2px solid rgba(26, 54, 93, 0.2);
  border-top-color: var(--teal, #2c7a7b);
  border-radius: 50%;
}
.lt-btn.is-wait .lt-spin { display: block; }
.lt-btn.is-on.is-wait .lt-spin {
  border-color: rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
}

.lt-all {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1rem;
  background: var(--card, #fffdf8);
  border-bottom: 1px solid var(--line, #e4ddd2);
}
.lt-all[hidden] { display: none; }
.lt-all-btn {
  border: 1px solid var(--navy, #1a365d);
  background: var(--teal, #2c7a7b);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
}
.lt-all-btn.is-on {
  background: var(--navy, #1a365d);
  border-color: var(--navy, #1a365d);
}

.lt-err {
  display: none;
  margin: 0.4rem 2.6rem 0 0;
  color: var(--bad, #b3372c);
  font-size: 0.85rem;
}
.lt-host.is-err .lt-err { display: block; }

.lt-panel {
  display: none;
  position: fixed;
  z-index: 40;
  width: min(22rem, calc(100vw - 1.5rem));
  background: var(--card, #fffdf8);
  color: var(--ink, #1a2744);
  border: 1px solid var(--line, #e4ddd2);
  border-radius: 14px;
  padding: 0.9rem 1rem 1rem;
  box-shadow: 0 8px 28px rgba(26, 39, 68, 0.18);
}
.lt-panel.is-open { display: block; }
.lt-panel h3 {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
}
.lt-panel label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--soft, #5b6780);
  margin: 0.65rem 0 0.3rem;
}
.lt-panel select {
  width: 100%;
  font-size: 1rem;
  padding: 0.45rem 0.5rem;
  border-radius: 8px;
  border: 1px solid var(--line, #e4ddd2);
  background: #fff;
}
.lt-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.lt-pill {
  border: 1px solid var(--line, #e4ddd2);
  background: #fff;
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--ink, #1a2744);
}
.lt-pill.is-on {
  background: var(--navy, #1a365d);
  border-color: var(--navy, #1a365d);
  color: #fff;
}
.lt-panel-close {
  margin-top: 0.85rem;
  border: 0;
  background: transparent;
  color: var(--soft, #5b6780);
  font-weight: 700;
  cursor: pointer;
  padding: 0;
}

@media (prefers-reduced-motion: reduce) {
  .lt-spin { border-top-color: var(--teal, #2c7a7b); }
}