.course-page {
  background: #ffffff;
  color: #1E1E1E;
}

.course-page .app-shell {
  background: #ffffff;
}

.course-page .content {
  background: #F5F6F7;
}

.course-player-shell {
  display: grid;
  gap: 20px;
  color: #1E1E1E;
}

.course-player,
.course-player__state {
  display: grid;
  gap: 18px;
  width: 100%;
  color: #1E1E1E;
}

.course-player__state {
  min-height: 360px;
  place-items: center;
  text-align: center;
  padding: 32px;
  background: #ffffff;
  border: 1px solid rgba(30, 30, 30, .08);
  border-radius: 12px;
}

.course-player__top-link {
  color: #1E1E1E;
  font-size: 16px;
  font-weight: 700;
  width: fit-content;
}

.course-player__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 24px;
  background: #ffffff;
  border: 1px solid rgba(30, 30, 30, .08);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.course-player__eyebrow {
  margin: 0 0 8px;
  color: #6B7280;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.course-player__title {
  margin: 0;
  color: #1E1E1E;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.05;
}

.course-player__meta {
  margin: 10px 0 0;
  color: #6B7280;
  font-size: 16px;
  line-height: 1.5;
}

.course-player__badge {
  flex: 0 0 auto;
  border-radius: 999px;
  padding: 10px 14px;
  background: #C9E4C5;
  color: #1E1E1E;
  font-size: 16px;
  font-weight: 800;
}

.course-player__slide-title {
  margin: 0;
  color: #1E1E1E;
  font-size: clamp(1.2rem, 2vw, 1.7rem);
}

.course-player__stage {
  display: grid;
  justify-items: center;
  gap: 16px;
}

.course-player__slide-frame {
  width: 100%;
  max-width: 1400px;
  aspect-ratio: 16 / 9;
  background: #ffffff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.course-player__slide-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.course-player__progress-wrap {
  width: 100%;
  max-width: 1400px;
  display: grid;
  gap: 8px;
}

.course-player__progress-labels {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: #6B7280;
  font-size: 16px;
  font-weight: 700;
}

.course-player__progress {
  width: 100%;
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: #e5e7eb;
}

.course-player__progress-fill {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #C9E4C5, #9fd19a);
  transition: width .2s ease;
}

.course-player__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px;
  background: #ffffff;
  border: 1px solid rgba(30, 30, 30, .08);
  border-radius: 12px;
}

.course-player__button,
.course-player__transcript-button,
.course-player__retry {
  min-height: 44px;
  border: 1px solid rgba(30, 30, 30, .14);
  border-radius: 8px;
  padding: 10px 16px;
  background: #ffffff;
  color: #1E1E1E;
  font-family: inherit;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
}

.course-player__button--primary,
.course-player__retry {
  background: #1E1E1E;
  color: #ffffff;
}

.course-player__button:hover,
.course-player__transcript-button:hover,
.course-player__retry:hover {
  border-color: #1E1E1E;
  transform: translateY(-1px);
}

.course-player__button:focus-visible,
.course-player__transcript-button:focus-visible,
.course-player__retry:focus-visible,
.course-player__top-link:focus-visible {
  outline: 3px solid #C9E4C5;
  outline-offset: 3px;
}

.course-player__button:disabled {
  cursor: not-allowed;
  opacity: .45;
  transform: none;
}

.course-player__transcript {
  max-width: 1400px;
  width: 100%;
  padding: 20px;
  background: #ffffff;
  border: 1px solid rgba(30, 30, 30, .08);
  border-radius: 12px;
  color: #1E1E1E;
  font-size: 16px;
  line-height: 1.6;
}

.course-player__transcript[hidden] {
  display: none;
}

.course-player__message {
  margin: 0;
  color: #6B7280;
  font-size: 16px;
}

.course-player__message--error {
  color: #9f1239;
}

@media (max-width: 760px) {
  .course-player__header {
    display: grid;
  }

  .course-player__badge {
    width: fit-content;
  }

  .course-player__controls {
    justify-content: stretch;
  }

  .course-player__button,
  .course-player__transcript-button {
    flex: 1 1 42%;
  }
}