.lesson-hero .container {
  max-width: 980px;
}

.lesson-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.lesson-hero .btn-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, .58);
  background: rgba(255, 255, 255, .08);
}

.lesson-solution .article {
  max-width: none;
}

.lesson-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, .9fr);
  gap: 28px;
  align-items: center;
}

.lesson-overview p {
  margin: 0;
  color: #4b5b70;
  font-size: 17px;
  line-height: 1.85;
}

.lesson-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.lesson-stat-grid div {
  min-height: 108px;
  padding: 18px 14px;
  border: 1px solid #dfe8f2;
  border-radius: 8px;
  background: #f7fbff;
  text-align: center;
}

.lesson-stat-grid strong {
  display: block;
  color: #17345b;
  font-size: 34px;
  line-height: 1;
}

.lesson-stat-grid span {
  display: block;
  margin-top: 10px;
  color: #526274;
  font-size: 14px;
}

.lesson-watch .section-heading,
#downloads .section-heading {
  max-width: none;
  margin: 0 0 18px;
}

.lesson-watch-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, .85fr);
  gap: 18px;
  align-items: start;
}

.lesson-player-stage {
  overflow: hidden;
  border: 1px solid #dfe8f2;
  border-radius: 8px;
  background: #07111f;
}

.lesson-course-video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #07111f;
}

.lesson-player-details {
  min-height: 100%;
  padding: 22px;
  border: 1px solid #dfe8f2;
  border-radius: 8px;
  background: #f7fbff;
}

.lesson-player-details p {
  margin: 0;
}

.lesson-player-details #activeLessonSummary {
  color: #24364b;
  font-size: 17px;
  line-height: 1.7;
}

.lesson-video-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.lesson-video-facts span {
  padding: 7px 10px;
  border-radius: 999px;
  background: #e9f1f8;
  color: #526274;
  font-size: 13px;
}

.lesson-playlist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.lesson-button {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  width: 100%;
  min-height: 72px;
  padding: 14px 16px;
  border: 1px solid #d9e2ed;
  border-radius: 8px;
  background: #fff;
  color: #13213a;
  text-align: left;
  cursor: pointer;
}

.lesson-button:hover,
.lesson-button.active {
  border-color: #17345b;
  box-shadow: 0 0 0 1px #17345b inset;
}

.lesson-button span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: #eff4fa;
  color: #17345b;
  font-weight: 700;
}

.lesson-button strong {
  font-size: 15px;
  line-height: 1.35;
}

.lesson-button em {
  color: #6a7788;
  font-size: 12px;
  font-style: normal;
  white-space: nowrap;
}

.lesson-download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.lesson-download-card {
  padding: 24px;
  border: 1px solid #dfe8f2;
  border-radius: 8px;
  background: #fff;
}

.lesson-download-card span {
  color: #6a7788;
  font-size: 12px;
  letter-spacing: .08em;
}

.lesson-download-card h3 {
  margin: 8px 0 10px;
  color: #16263a;
  font-size: 22px;
}

.lesson-download-card p {
  margin: 0 0 18px;
  color: #526274;
  line-height: 1.7;
}

@media (max-width: 900px) {
  .lesson-overview,
  .lesson-watch-layout,
  .lesson-download-grid {
    grid-template-columns: 1fr;
  }

  .lesson-playlist {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .lesson-hero-actions {
    gap: 10px;
  }

  .lesson-stat-grid {
    grid-template-columns: 1fr;
  }

  .lesson-button {
    grid-template-columns: 46px minmax(0, 1fr);
  }

  .lesson-button em {
    grid-column: 2;
  }
}