/* ===== Lesson YouTube Embed Card ===== */

:root {
  --yt-radius: 12px;
  --yt-accent: #1F2A44;
  --yt-badge-bg: #DC2626;
  --yt-title-color: #1F2A44;
  --yt-meta-color: #64748b;
  --yt-bg: #ffffff;
  --yt-border: #E2E8F0;
}

.lesson_youtube_card {
  background: var(--yt-bg);
  border: 1px solid var(--yt-border);
  border-top: 5px solid var(--yt-accent);
  border-radius: var(--yt-radius);
  padding: 18px 20px 20px;
  margin: 20px 0;
  box-shadow: 0 3px 10px rgba(31, 42, 68, 0.08);
}

.lesson_youtube_header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.lesson_youtube_icon {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  background: #FEE2E2;
  color: var(--yt-badge-bg);
}

.lesson_youtube_badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 10px;
  border-radius: 100px;
  margin-bottom: 4px;
  color: #ffffff;
  background: var(--yt-badge-bg);
}

.lesson_youtube_title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--yt-title-color);
}

.lesson_youtube_source {
  margin: 1px 0 0 0;
  font-size: 0.85rem;
  color: var(--yt-meta-color);
  font-style: italic;
}

/* Responsive 16:9 embed container */
.lesson_youtube_embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: 8px;
  background: #0f172a;
}

.lesson_youtube_embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---------- Mobile adaptation ---------- */
@media (max-width: 480px) {
  .lesson_youtube_card {
    padding: 14px 14px 16px;
  }
}