.course-player {
  width: min(100%, 96rem);
  margin: 0 auto;
  padding: 1rem;
}

.course-player__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.course-player__eyebrow {
  margin: 0 0 0.25rem;
  color: var(--primary-light, #8f88ff);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.course-player__header h1 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.2;
}

.course-player__status,
.course-player__error {
  margin-bottom: 1rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md, 0.75rem);
}

.course-player__status {
  border: 1px solid rgba(108, 99, 255, 0.45);
  background: rgba(108, 99, 255, 0.12);
  color: var(--text-primary, #f7f7fb);
}

.course-player__error {
  border: 1px solid var(--danger, #e85d75);
  background: rgba(232, 93, 117, 0.12);
}

.course-player__error p {
  margin: 0 0 0.75rem;
}

.course-player__frame-wrap {
  overflow: hidden;
  border: 1px solid var(--border-color, rgba(255, 255, 255, 0.12));
  border-radius: var(--radius-lg, 1rem);
  background: var(--dark-card, #181824);
}

.course-player__frame {
  display: block;
  width: 100%;
  min-height: max(42rem, calc(100vh - 13rem));
  border: 0;
  background: #fff;
}

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

.course-player__back:focus-visible,
.course-player__error:focus-visible,
.course-player__error button:focus-visible,
.course-player__frame:focus-visible {
  outline: 3px solid var(--primary-light, #8f88ff);
  outline-offset: 3px;
}

@media (max-width: 48rem) {
  .course-player {
    padding: 0.75rem;
  }

  .course-player__header {
    align-items: stretch;
    flex-direction: column;
  }

  .course-player__back {
    align-self: flex-start;
  }

  .course-player__frame {
    min-height: max(36rem, calc(100vh - 15rem));
  }
}

@media (prefers-reduced-motion: reduce) {
  .course-player *,
  .course-player *::before,
  .course-player *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}