/* ============================================================
   Speaker Mode – overlay, menu, waveform, avatar
   ============================================================ */

/* --- Trigger dot (lower-left corner, barely visible) --- */
.speaker-trigger {
  position: fixed;
  bottom: 14px;
  left: 14px;
  z-index: 901;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(126, 179, 255, .08);
  cursor: pointer;
  opacity: 0;
  transition: opacity .6s;
  pointer-events: none;
}
.speaker-trigger.hint {
  opacity: 1;
  pointer-events: auto;
}
.speaker-trigger:hover {
  background: rgba(126, 179, 255, .25);
}

/* --- Options menu (expands from trigger on hover) --- */
.speaker-menu {
  position: fixed;
  bottom: 14px;
  left: 14px;
  z-index: 900;
  background: rgba(10, 18, 37, .92);
  border: 1px solid rgba(126, 179, 255, .15);
  border-radius: 12px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  opacity: 0;
  transform: translateY(6px) scale(.95);
  transition: opacity .2s, transform .2s;
  pointer-events: none;
  backdrop-filter: blur(12px);
  min-width: 180px;
}
.speaker-menu.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.speaker-menu-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: #c8d6e5;
  font-size: 13px;
  font-family: 'Segoe UI', system-ui, sans-serif;
  cursor: pointer;
  transition: background .15s, color .15s;
  white-space: nowrap;
  text-align: left;
}
.speaker-menu-btn:hover {
  background: rgba(126, 179, 255, .12);
  color: #fff;
}
.speaker-menu-btn .icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}
.speaker-menu-sep {
  height: 1px;
  background: rgba(126, 179, 255, .12);
  margin: 2px 8px;
}
.speaker-menu-lang {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
}
.speaker-menu-lang label {
  color: #5a7a9b;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.speaker-menu-lang select {
  flex: 1;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid rgba(126, 179, 255, .15);
  background: rgba(0, 0, 0, .3);
  color: #c8d6e5;
  font-size: 12px;
  cursor: pointer;
}

/* --- Speaker pill (compact floating bar, draggable) --- */
.speaker-bar {
  position: fixed;
  bottom: 8px;
  left: 8px;
  z-index: 950;
  width: 390px;
  height: 46px;
  background: rgba(10, 18, 37, .82);
  border: 1px solid rgba(0, 180, 235, .12);
  border-radius: 23px;
  backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  padding: 0 8px 0 5px;
  gap: 8px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .35s, transform .35s;
  pointer-events: none;
  cursor: grab;
  user-select: none;
}
.speaker-bar.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  box-shadow: 0 2px 20px rgba(0, 61, 143, .25), 0 0 30px rgba(0, 180, 235, .06);
}
.speaker-bar.speaking {
  border-color: rgba(0, 180, 235, .22);
  box-shadow: 0 2px 24px rgba(0, 61, 143, .3), 0 0 16px rgba(0, 180, 235, .12);
}
.speaker-bar.dragging {
  cursor: grabbing;
  transition: none;
}

/* Avatar */
.speaker-bar .spk-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 180, 235, .08) 0%, rgba(0, 61, 143, .12) 100%);
  border: 1.5px solid rgba(0, 180, 235, .25);
  box-shadow: 0 0 8px rgba(0, 180, 235, .1), inset 0 0 6px rgba(0, 180, 235, .05);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: border-color .3s, box-shadow .3s;
}
/* Accent ring pulses when audio is playing */
.speaker-bar.speaking .spk-avatar {
  border-color: rgba(0, 180, 235, .45);
  box-shadow: 0 0 12px rgba(0, 180, 235, .2), 0 0 4px rgba(0, 180, 235, .15);
}
.speaker-bar .spk-avatar svg { width: 22px; height: 22px; }

/* Waveform — fills all remaining space */
.speaker-bar .spk-wave-wrap {
  flex: 1;
  height: 34px;
  min-width: 0;
}
.speaker-bar .spk-wave-wrap canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Controls: appear on hover / pinned when paused */
.speaker-bar .spk-ctrls {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  max-width: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-width .25s, opacity .2s;
  pointer-events: none;
}
.speaker-bar:hover .spk-ctrls,
.speaker-bar .spk-ctrls.pinned {
  max-width: 120px;
  opacity: 1;
  pointer-events: auto;
}

.speaker-bar .spk-status {
  color: #5a7a9b;
  font-size: 9px;
  min-width: 24px;
  text-align: center;
  white-space: nowrap;
}
.speaker-bar .spk-btn {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid rgba(126, 179, 255, .12);
  background: rgba(10, 18, 37, .7);
  color: #c8d6e5;
  font-size: 11px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s, color .15s;
}
.speaker-bar .spk-btn:hover {
  background: rgba(255, 255, 255, .12);
  color: #fff;
}
.speaker-bar .spk-btn.play {
  background: rgba(0, 180, 235, .1);
  border-color: rgba(0, 180, 235, .2);
  color: #00d4aa;
}
.speaker-bar .spk-btn.play:hover {
  background: rgba(0, 180, 235, .2);
}

/* --- Mobile --- */
@media (pointer: coarse) {
  /* Speaker bar: compact */
  .speaker-bar { width: min(320px, calc(100vw - 16px)); left: 8px; height: 38px; padding: 0 5px 0 3px; gap: 5px; }
  .speaker-bar .spk-ctrls { opacity: 1; max-width: 100px; pointer-events: auto; }
  .speaker-bar .spk-btn { width: 24px; height: 24px; font-size: 10px; }
  .speaker-bar .spk-avatar { width: 28px; height: 28px; }
  .speaker-bar .spk-avatar svg { width: 16px; height: 16px; }
  .speaker-bar .spk-wave-wrap { height: 24px; }
  .speaker-bar .spk-status { font-size: 8px; min-width: 20px; }

  /* Trigger: larger tap target */
  .speaker-trigger { width: 44px; height: 44px; bottom: 10px; left: 10px; border-radius: 50%;
    background: rgba(0, 180, 235, .12); border: 1px solid rgba(0, 180, 235, .2);
    opacity: 0; }
  .speaker-trigger.hint { opacity: 1; }

  /* Menu: full-width bottom sheet */
  .speaker-menu { bottom: 0; left: 0; right: 0; width: auto; min-width: 0;
    border-radius: 16px 16px 0 0; padding: 16px; gap: 8px; }
  .speaker-menu-btn { padding: 14px 18px; font-size: 16px; }
  .speaker-menu-btn .icon { font-size: 20px; }
  .speaker-menu-lang { padding: 10px 18px; }
  .speaker-menu-lang select { font-size: 15px; padding: 8px 12px; }
  .speaker-menu-lang label { font-size: 14px; }
}

/* === Learning-mode navigation arrows ======================== */
.ds-nav-arrow {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 64px; height: 64px;
  display: none;
  align-items: center; justify-content: center;
  background: rgba(255,255,255,.86);
  color: rgba(11,31,51,.55);
  border: 1px solid rgba(11,31,51,.12);
  border-radius: 50%;
  box-shadow: 0 14px 38px rgba(11,31,51,.18);
  cursor: pointer;
  z-index: 90;
  opacity: 0.35;
  transition: opacity .25s ease, color .25s ease, background .25s ease, transform .15s ease;
}
.ds-nav-arrow:hover { transform: translateY(-50%) scale(1.04); }
.ds-nav-arrow.visible { display: flex; }
.ds-nav-arrow.ready  { opacity: 1; color: #00539f; background: #ffffff; }
.ds-nav-arrow.blocked {
  opacity: 0.18;
  color: rgba(11,31,51,.45);
  cursor: not-allowed;
  pointer-events: none;
}
#ds-nav-left  { left: 28px; }
#ds-nav-right { right: 28px; }

.ds-nav-continue {
  position: fixed;
  right: 18px;
  top: calc(50% + 50px);
  display: none;
  padding: 6px 12px;
  border-radius: 999px;
  background: #1e8f5c;
  color: #ffffff;
  font: 700 14px/1 'Inter', system-ui, sans-serif;
  letter-spacing: .04em;
  text-transform: uppercase;
  box-shadow: 0 10px 26px rgba(30,143,92,.35);
  z-index: 90;
  width: 84px; text-align: center;
}
.ds-nav-continue.visible { display: block; }