.course-page {
  width: min(100% - (2 * var(--lesson-page-gutter)), var(--lesson-content-max));
  margin-inline: auto;
  padding-block: var(--lesson-page-top) var(--lesson-page-bottom);
}

.course-view-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  width: min(960px, calc(100% - 24px));
  margin: 18px auto 0;
}

.course-view-tabs button {
  padding: 9px 16px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.course-view-tabs button.is-active {
  color: #fff;
  background: var(--accent, #176b55);
  border-color: var(--accent, #176b55);
}

.course-page-header {
  margin-bottom: var(--lesson-header-gap);
}

.course-page-label {
  margin: 0 0 var(--lesson-label-gap);
  color: var(--muted);
  font-size: var(--lesson-label-size);
  font-weight: 600;
  letter-spacing: var(--lesson-label-tracking);
  text-transform: uppercase;
}

.course-page-title {
  margin: 0;
  color: var(--text);
  font-size: var(--lesson-title-size);
  line-height: var(--lesson-title-line-height);
}

.lesson-list {
  border-top: var(--lesson-border-width) solid var(--border);
}

.lesson-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--lesson-column-gap);
  padding-block: var(--lesson-row-padding);
  border-bottom: var(--lesson-border-width) solid var(--border);
}

.lesson-language {
  min-width: 0;
}

.lesson-primary,
.lesson-secondary {
  display: block;
  overflow-wrap: anywhere;
}

.lesson-primary {
  color: var(--text);
  font-size: var(--lesson-primary-size);
  font-weight: 500;
  line-height: var(--lesson-primary-line-height);
}

.lesson-secondary {
  margin-top: var(--lesson-secondary-gap);
  color: var(--muted);
  font-size: var(--lesson-secondary-size);
  line-height: var(--lesson-secondary-line-height);
}

[data-segment-id] {
  border-radius: var(--lesson-active-radius);
  transition: color var(--lesson-active-transition), background-color var(--lesson-active-transition);
}

[data-segment-id].is-active {
  color: var(--lesson-active-text);
  background: var(--lesson-active-bg);
}

.lesson-play-all {
  position: fixed;
  left: 50%;
  bottom: var(--lesson-play-bottom);
  display: block;
  min-height: var(--lesson-play-height);
  margin: var(--lesson-play-margin) auto 0;
  padding-inline: var(--lesson-play-padding);
  color: var(--lesson-play-text);
  background: var(--lesson-play-bg);
  border: 0;
  border-radius: var(--lesson-play-radius);
  box-shadow: var(--shadow-hover);
  transform: translateX(-50%);
  z-index: var(--lesson-play-z-index);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.lesson-player-error {
  margin: 10px 0 0;
  color: #b42318;
  font-size: 14px;
  text-align: center;
}

@media (min-width: 48rem) {
  .course-page {
    padding-block: var(--lesson-page-top-desktop) var(--lesson-page-bottom);
  }

  .lesson-row {
    gap: var(--lesson-column-gap-desktop);
  }
}