/* ============================================================
   aws.css — Universal Skeleton Layout & Equal-Height Player
   ============================================================ */


/* ── 1. AWS HERO SECTION ──────────────────────────────────── */
.aws-hero {
  padding: 72px 0 60px;
  background: radial-gradient(ellipse at top left, #1a3a6e 0%, var(--clr-surface, #111827) 50%, var(--clr-bg, #0a0e1a) 100%) !important;
  color: var(--clr-text, #f8fafc);
  position: relative;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  align-items: center;
}

.aws-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 8% 20%,  var(--glow-accent, rgba(56, 189, 248, 0.25)) 0, transparent 50%),
    radial-gradient(circle at 85% 75%, rgba(167, 139, 250, 0.18) 0, transparent 50%);
  pointer-events: none;
}

.aws-hero .container { position: relative; z-index: 1; }

.aws-hero-pill {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 50px;
  background: var(--glow-accent, rgba(56, 189, 248, 0.15));
  border: 1px solid var(--clr-border-blue, rgba(56, 189, 248, 0.35));
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-accent, #38bdf8);
  margin-bottom: 18px;
}

.aws-hero-title {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  font-weight: 800;
  color: var(--clr-text, #f8fafc);
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.aws-hero-subtitle {
  font-size: 1rem;
  color: var(--clr-text-muted, #94a3b8);
  max-width: 500px;
  line-height: 1.75;
  margin-bottom: 20px;
}

.aws-hero-highlights {
  list-style: none;
  padding: 0;
  margin-bottom: 28px;
}

.aws-hero-highlights li {
  font-size: 0.92rem;
  color: var(--clr-text-muted, #94a3b8);
  margin-bottom: 7px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.aws-hero-highlights li span {
  font-weight: 700;
  color: var(--clr-accent, #38bdf8);
  min-width: 80px;
}

.aws-hero-cta {
  display: inline-block;
  background: var(--clr-accent, #38bdf8) !important;
  color: #000000 !important;
  border-radius: 50px;
  padding: 13px 30px;
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  text-decoration: none !important;
  cursor: pointer;
  box-shadow: 0 0 20px var(--glow-accent, rgba(56, 189, 248, 0.25));
  transition: all 0.25s ease;
}

.aws-hero-cta:hover {
  background: var(--clr-accent-light, #7dd3fc) !important;
  transform: translateY(-2px);
  box-shadow: var(--glow-strong, 0 0 25px rgba(56, 189, 248, 0.45));
}

.aws-hero-card {
  background: var(--clr-surface, #111827) !important;
  border-radius: 16px;
  padding: 26px 24px;
  border: 1px solid var(--clr-border, rgba(255, 255, 255, 0.08)) !important;
  box-shadow: var(--card-shadow, 0 10px 30px rgba(0, 0, 0, 0.4)) !important;
  color: var(--clr-text, #f8fafc);
  backdrop-filter: blur(8px);
}

.aws-hero-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text, #f8fafc);
  margin-bottom: 8px;
}

.aws-hero-card p {
  font-size: 0.875rem;
  color: var(--clr-text-muted, #94a3b8);
  margin-bottom: 16px;
  line-height: 1.65;
}

.aws-hero-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aws-hero-card li {
  font-size: 0.875rem;
  color: var(--clr-text-muted, #94a3b8);
  padding-left: 18px;
  position: relative;
  line-height: 1.5;
}

.aws-hero-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--clr-accent, #38bdf8);
  font-weight: 700;
  font-size: 0.8rem;
}


/* ── 2. COURSE CONTENT & EQUAL HEIGHT SKELETON GRID ────── */
#aws-course-content {
  scroll-margin-top: var(--nav-height, 72px);
  background: var(--clr-bg, #0a0e1a) !important;
  padding: 32px 0 64px;
}

.course-player-row {
  display: flex;
  align-items: stretch;
}

/* ── 3. LEFT VIDEO CONTAINER ────────────────────────────── */
.course-video-wrapper {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.aws-video-card {
  background: var(--clr-surface, #111827) !important;
  border-radius: 16px;
  padding: 16px;
  border: 1px solid var(--clr-border, rgba(255, 255, 255, 0.08)) !important;
  box-shadow: var(--card-shadow, 0 10px 30px rgba(0, 0, 0, 0.4)) !important;
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Video Aspect Ratio Box */
.aws-video-body {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  background: #000000;
  overflow: hidden;
}

.aws-video-body iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* Details area below video */
.aws-video-info-bottom {
  padding: 12px 4px 4px;
  border-bottom: 1px solid var(--clr-border, rgba(255, 255, 255, 0.08));
}

.aws-video-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-text, #f8fafc);
}

.aws-video-subtitle {
  font-size: 0.85rem;
  color: var(--clr-text-muted, #94a3b8);
}

/* Badge removed per requirement */
.aws-video-badge {
  display: none !important;
}


/* ── 4. RIGHT SIDEBAR — YOUTUBE PLAYLIST SKELETON ────────── */
.course-sections {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--clr-surface, #111827) !important;
  border: 1px solid var(--clr-border, rgba(255, 255, 255, 0.08)) !important;
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--card-shadow, 0 10px 30px rgba(0, 0, 0, 0.4)) !important;
}

.course-sections-header {
  flex-shrink: 0;
  margin-bottom: 12px;
}

.course-accordion-scroll {
  flex: 1;
  overflow-y: auto;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--clr-accent, #38bdf8) var(--clr-surface2, #1a2235);
}

.course-accordion-scroll::-webkit-scrollbar {
  width: 5px;
}

.course-accordion-scroll::-webkit-scrollbar-track {
  background: var(--clr-surface2, #1a2235);
  border-radius: 10px;
}

.course-accordion-scroll::-webkit-scrollbar-thumb {
  background: var(--clr-accent, #38bdf8);
  border-radius: 10px;
}


/* ── 5. ACCORDION & LESSON ITEMS ─────────────────────────── */
.course-sections .accordion-item {
  background: var(--clr-surface2, #1a2235) !important;
  border: 1px solid var(--clr-border, rgba(255, 255, 255, 0.08)) !important;
  border-radius: 8px !important;
  overflow: hidden;
  margin-bottom: 8px;
}

.course-sections .accordion-button {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-text, #f8fafc);
  background: var(--clr-surface2, #1a2235);
  padding: 12px 14px;
  box-shadow: none !important;
}

.course-sections .accordion-button:not(.collapsed) {
  background: var(--glow-accent, rgba(56, 189, 248, 0.15));
  color: var(--clr-accent, #38bdf8);
}

.course-sections .accordion-button::after {
  filter: invert(1) brightness(0.7);
}

.course-sections .accordion-button:not(.collapsed)::after {
  filter: none;
}

.course-sections .accordion-body {
  background: var(--clr-surface3, #050811);
  padding: 0 !important;
}

.course-video-list .list-group-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--clr-border, rgba(255, 255, 255, 0.05));
  font-size: 0.82rem;
  color: var(--clr-text-muted, #94a3b8);
  padding: 10px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.course-video-list .list-group-item:hover {
  background: var(--glow-accent, rgba(56, 189, 248, 0.1));
  color: var(--clr-text, #f8fafc);
}

.course-video-list .list-group-item.active {
  background: var(--glow-accent, rgba(56, 189, 248, 0.2)) !important;
  color: var(--clr-accent, #38bdf8) !important;
  font-weight: 700;
  border-left: 3px solid var(--clr-accent, #38bdf8);
}


/* ── 6. BREADCRUMBS & STATS BAR ───────────────────────────── */
.aws-breadcrumb {
  background: var(--clr-surface, #111827) !important;
  border-bottom: 1px solid var(--clr-border, rgba(255, 255, 255, 0.08));
  padding: 10px 0;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.breadcrumb-list li a {
  font-size: 0.82rem;
  color: var(--clr-text-muted, #94a3b8);
}

.breadcrumb-list .current {
  font-size: 0.82rem;
  color: var(--clr-accent, #38bdf8);
  font-weight: 500;
}

.aws-stats-bar {
  background: var(--clr-surface, #111827) !important;
  border-bottom: 1px solid var(--clr-border, rgba(255, 255, 255, 0.08));
  padding: 14px 0;
}

.aws-stats-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.aws-stat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 24px;
}

.aws-stat-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-text, #f8fafc);
}

.aws-stat-label {
  font-size: 0.75rem;
  color: var(--clr-text-muted, #94a3b8);
}

.aws-stat-divider {
  width: 1px;
  height: 28px;
  background: var(--clr-border, rgba(255, 255, 255, 0.08));
  flex-shrink: 0;
}


/* ── 7. NEXT LESSON BAR ───────────────────────────────────── */
.aws-next-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 4px 4px;
  margin-top: 14px;
  gap: 12px;
  flex-wrap: wrap;
}

.aws-next-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--clr-text-dim, #64748b);
}

.aws-next-title {
  font-size: 0.88rem;
  color: var(--clr-text-muted, #94a3b8);
}

.aws-next-btn {
  background: var(--clr-accent, #38bdf8) !important;
  color: #000000 !important;
  border: none;
  border-radius: 50px;
  padding: 9px 22px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s ease;
}

.aws-next-btn:hover {
  background: var(--clr-accent-light, #7dd3fc) !important;
  box-shadow: var(--glow-strong, 0 0 20px rgba(56, 189, 248, 0.35));
}


/* ── 8. PROGRESS BOX ──────────────────────────────────────── */
.aws-progress-box {
  background: var(--clr-surface2, #1a2235) !important;
  border: 1px solid var(--clr-border, rgba(255, 255, 255, 0.08)) !important;
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 12px;
  flex-shrink: 0;
}

.aws-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.aws-progress-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text, #f8fafc);
}

.aws-progress-count {
  font-size: 0.78rem;
  color: var(--clr-accent, #38bdf8);
  font-weight: 600;
}

.aws-progress-track {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50px;
  overflow: hidden;
  margin-bottom: 6px;
}

.aws-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-accent, #38bdf8), var(--clr-accent2, #a78bfa));
  border-radius: 50px;
  transition: width 0.5s ease;
}

.aws-progress-footer {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--clr-text-muted, #94a3b8);
}


/* ── 9. RESPONSIVE ────────────────────────────────────────── */
@media (max-width: 991px) {
  .aws-hero {
    padding: 48px 0 36px !important;
    min-height: auto !important;
  }

  .course-player-row {
    flex-direction: column !important;
    row-gap: 20px;
  }

  .course-player-col {
    width: 100% !important;
  }

  .course-playlist-col {
    width: 100% !important;
  }

  .course-sections {
    height: auto !important;
    max-height: 460px !important;
    overflow-y: auto !important;
    margin-top: 12px !important;
  }

  .aws-hero-card {
    margin-top: 24px;
  }
}

@media (max-width: 576px) {
  .aws-breadcrumb {
    padding: 10px 0 !important;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }

  .aws-breadcrumb ol {
    flex-wrap: nowrap;
  }

  .aws-hero-title {
    font-size: clamp(1.6rem, 6vw, 2.2rem) !important;
  }

  .aws-hero-cta {
    width: 100%;
    text-align: center;
  }

  .aws-video-info {
    padding: 14px 16px !important;
  }

  .aws-video-title {
    font-size: 1.05rem !important;
  }

  .aws-next-bar {
    padding: 12px 16px !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 12px !important;
  }

  .aws-next-btn {
    width: 100% !important;
    text-align: center !important;
  }

  .course-accordion-header {
    padding: 12px 14px !important;
    font-size: 0.85rem !important;
  }

  .lesson-item {
    padding: 10px 12px !important;
    font-size: 0.8rem !important;
  }
}