.lesson-shell {
  padding: 3.2rem 0 2.8rem;
}

.back-link {
  color: var(--green);
  font-weight: 900;
}

.lesson-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.4rem;
}

.lesson-nav {
  display: flex;
  gap: 0.6rem;
}

.lesson-header {
  display: flex;
  gap: 1.2rem;
  align-items: center;
  margin-bottom: 1.4rem;
}

.lesson-emoji {
  width: 92px;
  height: 92px;
  border-radius: 26px;
  display: grid;
  place-items: center;
  font-size: 2.6rem;
  background: linear-gradient(135deg, rgba(201, 166, 70, 0.18), rgba(46, 125, 90, 0.18));
  border: 1px solid rgba(230, 220, 201, 0.9);
  box-shadow: var(--shadow-soft);
}

.lesson-meta h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  color: var(--velvet);
}

.lesson-panel {
  margin-top: 1rem;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  padding: 1.5rem;
}

.lesson-panel-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.lesson-panel-title {
  color: var(--velvet);
  margin-bottom: 0.5rem;
}

.coach-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.coach-note {
  color: var(--muted);
  font-weight: 650;
  font-size: 0.95rem;
}

.coach-speed {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem;
  border-radius: 999px;
  border: 1px solid rgba(74, 30, 72, 0.14);
  background: rgba(74, 30, 72, 0.05);
}

.coach-speed-btn {
  border: 0;
  background: transparent;
  color: var(--velvet-dark);
  font-weight: 900;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  opacity: 0.82;
  transition: opacity 0.18s ease, transform 0.18s ease, background 0.18s ease;
}

.coach-speed-btn:hover {
  opacity: 1;
  transform: translateY(-1px);
}

.coach-speed-btn.is-active {
  opacity: 1;
  color: #2f2100;
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  box-shadow: 0 10px 18px rgba(201, 166, 70, 0.18);
}

.drill-row {
  margin-top: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.drill-timer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.95rem 1.1rem;
  border-radius: 20px;
  border: 1px solid rgba(230, 220, 201, 0.95);
  background: rgba(255, 255, 255, 0.72);
}

.drill-timer.is-done {
  border-color: rgba(46, 125, 90, 0.35);
  box-shadow: 0 0 0 4px rgba(46, 125, 90, 0.08);
}

.timer-display {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  font-weight: 950;
  color: var(--velvet);
  font-size: 1.6rem;
}

.timer-label {
  font-size: 1rem;
  color: var(--muted);
  font-weight: 850;
}

.drill-note strong {
  color: var(--velvet-dark);
}

.drill-note p {
  margin-top: 0.35rem;
  max-width: 54ch;
}

.prompt-box {
  margin-top: 1.4rem;
}

.prompt-box h3 {
  color: var(--velvet);
}

.prompt-box ul {
  margin-top: 0.8rem;
  display: grid;
  gap: 0.7rem;
}

.prompt-box li {
  padding: 0.85rem 1rem;
  border-radius: 16px;
  background: rgba(74, 30, 72, 0.06);
  border: 1px solid rgba(230, 220, 201, 0.8);
  color: var(--velvet-dark);
  font-weight: 750;
}

.complete-form {
  margin-top: 1.6rem;
  display: grid;
  gap: 1rem;
}

.confidence-block {
  padding: 1rem;
  border-radius: 20px;
  border: 1px solid rgba(230, 220, 201, 0.95);
  background: rgba(255, 255, 255, 0.65);
}

.confidence-label {
  display: inline-block;
  font-weight: 950;
  color: var(--velvet-dark);
  margin-bottom: 0.6rem;
}

.confidence-options {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.confidence-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(74, 30, 72, 0.14);
  background: rgba(74, 30, 72, 0.06);
  color: var(--velvet-dark);
  font-weight: 850;
  cursor: pointer;
}

.confidence-chip input {
  accent-color: var(--green);
}

.confidence-note {
  margin-top: 0.7rem;
  font-size: 0.95rem;
}

@media (max-width: 760px) {
  .coach-note {
    width: 100%;
  }
}

/* image hooks: lesson header visual */
.lesson-visual {
  width: 92px;
  height: 92px;
  border-radius: 26px;
  overflow: hidden;
  border: 1px solid rgba(230, 220, 201, 0.9);
  box-shadow: var(--shadow-soft);
  background: rgba(255, 255, 255, 0.72);
}

.lesson-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ================================
   lesson hero promote v1
   ================================ */

.lesson-visual--hero {
  max-width: 980px;
  margin: 0 auto 1.2rem;
}

.lesson-visual {
  --progress: 0.12;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(230, 220, 201, 0.9);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  transform: translateY(10px) scale(0.985);
  transition: opacity 320ms ease, transform 420ms cubic-bezier(0.2, 0.9, 0.2, 1);
}

.lesson-visual.is-mounted {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.lesson-visual img {
  width: 100%;
  height: auto;
  display: block;
  transform-origin: 50% 45%;
  will-change: transform, filter, opacity;

  opacity: calc(0.72 + (var(--progress) * 0.28));
  filter:
    blur(calc((1 - var(--progress)) * 5px))
    contrast(calc(1.02 + (var(--progress) * 0.10)))
    saturate(calc(0.92 + (var(--progress) * 0.08)));
  transform: scale(calc(1.02 + (var(--progress) * 0.03)));

  transition:
    transform 260ms cubic-bezier(0.2, 0.9, 0.2, 1),
    filter 260ms cubic-bezier(0.2, 0.9, 0.2, 1),
    opacity 260ms cubic-bezier(0.2, 0.9, 0.2, 1);
}

.lesson-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at top left, rgba(201, 166, 70, 0.10), transparent 55%),
    radial-gradient(circle at bottom right, rgba(46, 125, 90, 0.12), transparent 55%);
  opacity: calc(0.25 + (var(--progress) * 0.25));
  transition: opacity 260ms ease;
}

.lesson-visual.is-pop img {
  transform: scale(calc(1.035 + (var(--progress) * 0.03)));
}


/* ================================
   lesson hero promote fix v2
   ================================ */

/* never hide lesson visuals by default */
.lesson-visual {
  opacity: 1 !important;
  transform: none !important;
}

/* only the hero animates in */
.lesson-visual--hero {
  max-width: 980px;
  margin: 0 auto 1.2rem;
  opacity: 0 !important;
  transform: translateY(10px) scale(0.985) !important;
  transition: opacity 320ms ease, transform 420ms cubic-bezier(0.2, 0.9, 0.2, 1);
}

.lesson-visual--hero.is-mounted {
  opacity: 1 !important;
  transform: translateY(0) scale(1) !important;
}

/* ================================
   lesson hero image v1
   ================================ */

.lesson-hero {
  max-width: 980px;
  margin: 0 auto 1.25rem;
}

.lesson-visual--hero {
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(230, 220, 201, 0.9);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-soft);
  transform: translateY(8px) scale(0.985);
  opacity: 0;
  animation: lesson-hero-in 520ms cubic-bezier(0.2, 0.9, 0.2, 1) forwards;
}

.lesson-visual--hero img {
  width: 100%;
  height: auto;
  display: block;
}

.lesson-hero-missing {
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  padding: 1.2rem;
  text-align: center;
  background: rgba(0,0,0,0.03);
}

.lesson-hero-missing code {
  display: inline-block;
  margin-top: 0.6rem;
  padding: 0.5rem 0.7rem;
  border-radius: 12px;
  border: 1px solid rgba(230, 220, 201, 0.9);
  background: rgba(255,255,255,0.8);
  color: var(--velvet-dark);
  font-weight: 900;
  font-size: 0.9rem;
}

@keyframes lesson-hero-in {
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

/* ================================
   coach safari v2
   ================================ */

.coach-float {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.05rem;
  border-radius: 999px;
  border: 1px solid rgba(230, 220, 201, 0.9);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  cursor: pointer;
  font-weight: 900;
  color: var(--velvet-dark);
}

.coach-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--gold), var(--green-soft));
  box-shadow: 0 0 16px rgba(201, 166, 70, 0.45);
}

.coach-float.is-pulse {
  transform: translateY(-1px);
}

.coach-status {
  position: fixed;
  right: 16px;
  bottom: 64px;
  z-index: 9999;
  max-width: min(420px, calc(100vw - 32px));
  padding: 0.65rem 0.85rem;
  border-radius: 16px;
  border: 1px solid rgba(230, 220, 201, 0.9);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
  color: var(--muted);
  font-weight: 800;
  font-size: 0.92rem;
}

.coach-status.is-error {
  border-color: rgba(161, 39, 39, 0.25);
  background: rgba(161, 39, 39, 0.07);
  color: #8f1f1f;
}

/* ================================
   kill coach popup v1
   ================================ */

.coach-float,
.coach-status,
.tts-controls,
.speech-controls,
.playback-controls,
.playback-speed,
.speed-popup,
.voice-popup {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

/* ================================
   bubble coach v2
   ================================ */

.bubble-coach {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin: 0 auto 0.9rem;
  padding: 0.8rem 0.9rem;
  border-radius: 18px;
  border: 1px solid rgba(230, 220, 201, 0.9);
  background: rgba(255, 255, 255, 0.75);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
}

.bubble-coach__btn {
  border: 1px solid rgba(74, 30, 72, 0.15);
  background: rgba(255, 255, 255, 0.65);
  color: var(--velvet-dark);
  font-weight: 900;
  padding: 0.6rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
}

.bubble-coach__btn--primary {
  background: linear-gradient(135deg, var(--velvet), var(--green));
  color: #fff;
  border: 0;
}

.bubble-coach__rate {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-left: 0.25rem;
}

.bubble-coach__label {
  font-weight: 900;
  color: var(--muted);
  font-size: 0.9rem;
}

.bubble-coach__value {
  font-weight: 950;
  color: var(--velvet-dark);
  font-size: 0.92rem;
  min-width: 3.2rem;
}

.bubble-coach__status {
  margin-left: auto;
  font-weight: 900;
  color: var(--muted);
  font-size: 0.92rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 44ch;
}

.bubble-coach__status.is-error {
  color: #8f1f1f;
}

@media (max-width: 760px) {
  .bubble-coach__status {
    width: 100%;
    margin-left: 0;
    max-width: none;
  }
}

/* ================================
   simple bubble coach v1
   ================================ */

/* ensure any old coach bars/buttons are hidden */
.bubble-coach,
.coach-float,
.coach-status {
  display: none !important;
}

/* ================================
   coach controls v1
   ================================ */

.coach-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin: 0 auto 0.9rem;
  padding: 0.8rem 0.9rem;
  border-radius: 18px;
  border: 1px solid rgba(230, 220, 201, 0.9);
  background: rgba(255, 255, 255, 0.75);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
}

.coach-controls__toggle {
  border: 0;
  cursor: pointer;
  font-weight: 950;
  padding: 0.65rem 0.95rem;
  border-radius: 999px;
  background: rgba(74, 30, 72, 0.10);
  color: var(--velvet-dark);
}

.coach-controls.is-on .coach-controls__toggle {
  background: linear-gradient(135deg, var(--velvet), var(--green));
  color: #ffffff;
}

.coach-controls__rate {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.coach-controls__label {
  font-weight: 900;
  color: var(--muted);
  font-size: 0.9rem;
}

.coach-controls__slider {
  width: 160px;
}

.coach-controls__value {
  font-weight: 950;
  color: var(--velvet-dark);
  font-size: 0.92rem;
  min-width: 3.4rem;
}

.coach-controls__status {
  margin-left: auto;
  font-weight: 900;
  color: var(--muted);
  font-size: 0.92rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 44ch;
}

.coach-controls__status.is-error {
  color: #8f1f1f;
}

@media (max-width: 760px) {
  .coach-controls__status {
    width: 100%;
    margin-left: 0;
    max-width: none;
  }
  .coach-controls__slider {
    width: 140px;
  }
}

/* ================================
   coach controls v2
   ================================ */

.coach-controls__test {
  border: 1px solid rgba(74, 30, 72, 0.15);
  background: rgba(255, 255, 255, 0.65);
  color: var(--velvet-dark);
  font-weight: 950;
  padding: 0.65rem 0.95rem;
  border-radius: 999px;
  cursor: pointer;
}

.coach-controls__status {
  margin-left: auto;
  font-weight: 900;
  color: var(--muted);
  font-size: 0.92rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 60ch;
}

.coach-controls__status.is-error {
  color: #8f1f1f;
}

/* lesson scene image v1 */

.lesson-scene-hero {
  max-width: 980px;
  margin: 0 auto 1.2rem;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(230, 220, 201, 0.9);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  transform: translateY(8px) scale(0.985);
  transition: opacity 360ms ease, transform 420ms cubic-bezier(0.2, 0.9, 0.2, 1);
}

.lesson-scene-hero.is-mounted {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.lesson-scene-hero__img {
  display: block;
  width: 100%;
  height: auto;
}