.home-course-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.home-course-item {
  margin: 0;
  padding: 14px 16px;
  background: var(--home-surface);
  border: 1px solid var(--home-border);
  border-radius: 10px;
}

.home-course-item--playlist {
  display: grid;
  grid-template-columns: minmax(140px, 180px) minmax(0, 1fr);
  gap: 16px 20px;
  padding: 16px;
  align-items: start;
}

.home-course-cover-link {
  display: block;
  text-decoration: none;
  border-radius: 10px;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.home-course-cover-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}

.home-course-item-main {
  min-width: 0;
}

.home-course-item-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin: 0 0 6px;
}

.home-course-item-head h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
  color: #e8e8e8;
}

.home-course-item-head h3 a {
  color: inherit;
  text-decoration: none;
}

.home-course-item-head h3 a:hover {
  color: var(--home-accent);
}

.home-tier {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.home-tier--free {
  color: #b5e8b5;
  border: 1px solid #3d6b3d;
  background: rgba(61, 107, 61, 0.25);
}

.home-tier--pro {
  color: #4fc1ff;
  border: 1px solid #0e639c;
  background: rgba(14, 99, 156, 0.28);
}

.home-course-meta {
  margin: 0 0 8px !important;
  font-size: 0.8rem !important;
  color: var(--home-accent) !important;
  font-weight: 500;
}

.home-course-tagline {
  margin: 0 0 10px !important;
  font-size: 0.85rem !important;
  color: var(--home-muted);
}

.home-course-item p,
.home-course-item-main > p {
  margin: 0 0 10px;
  font-size: 0.9rem;
  color: var(--home-muted);
}

.home-course-item code,
.home-course-item-main code {
  font-size: 0.85em;
  color: #d7ba7d;
}

.home-course-item .home-btn,
.home-course-item-main .home-btn {
  font-size: 0.85rem;
  padding: 5px 12px;
  margin-top: 4px;
}

.home-syllabus {
  margin: 0 0 12px;
  padding: 0;
  border: 1px solid var(--home-border);
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.18);
}

.home-syllabus > summary {
  cursor: pointer;
  list-style: none;
  padding: 10px 12px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #e8e8e8;
  user-select: none;
}

.home-syllabus > summary::-webkit-details-marker {
  display: none;
}

.home-syllabus > summary::before {
  content: "▸ ";
  color: var(--home-accent);
  font-weight: 700;
}

.home-syllabus[open] > summary::before {
  content: "▾ ";
}

.home-syllabus-body {
  padding: 0 12px 12px;
  border-top: 1px solid var(--home-border);
}

.home-syllabus-part {
  margin: 12px 0 0;
}

.home-syllabus-part:first-child {
  margin-top: 10px;
}

.home-syllabus-part-title {
  margin: 0 0 4px;
  font-size: 0.92rem;
  font-weight: 600;
  color: #e8e8e8;
}

.home-syllabus-lead {
  margin: 0 0 6px;
  font-size: 0.82rem;
  color: var(--home-muted);
  font-style: italic;
}

.home-lesson-list {
  margin: 0;
  padding: 0 0 0 1.15em;
  font-size: 0.84rem;
  color: var(--home-muted);
}

.home-lesson-list li {
  margin: 0 0 5px;
  padding: 0;
  line-height: 1.45;
}

.home-lesson-title {
  color: #d4d4d4;
  font-weight: 600;
}

.home-lesson-blurb {
  color: var(--home-muted);
  font-weight: 400;
}

.home-syllabus-section-title {
  margin: 14px 0 6px;
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  color: var(--home-accent);
}

.learn-cover {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(ellipse at 30% 20%, rgba(79, 193, 255, 0.35), transparent 55%),
    radial-gradient(ellipse at 80% 80%, rgba(78, 201, 176, 0.22), transparent 50%),
    linear-gradient(160deg, #0c1c22 0%, #141414 55%, #0a0a0a 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.learn-cover--systemverilog {
  background:
    radial-gradient(ellipse at 25% 15%, rgba(120, 160, 255, 0.35), transparent 55%),
    radial-gradient(ellipse at 85% 75%, rgba(180, 100, 255, 0.18), transparent 50%),
    linear-gradient(160deg, #12182a 0%, #141414 60%, #0a0a0a 100%);
}

.learn-cover--uvm {
  background:
    radial-gradient(ellipse at 30% 20%, rgba(255, 180, 80, 0.28), transparent 55%),
    radial-gradient(ellipse at 80% 80%, rgba(79, 193, 255, 0.18), transparent 50%),
    linear-gradient(160deg, #1c1610 0%, #141414 60%, #0a0a0a 100%);
}

.learn-cover--axi {
  background:
    radial-gradient(ellipse at 28% 18%, rgba(78, 201, 176, 0.32), transparent 55%),
    radial-gradient(ellipse at 78% 78%, rgba(79, 193, 255, 0.2), transparent 50%),
    linear-gradient(160deg, #0e1c1a 0%, #141414 60%, #0a0a0a 100%);
}

.learn-cover-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.06em;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #dfffe8;
}

.learn-cover--pro .learn-cover-badge {
  color: #b8e7ff;
}

.learn-cover-count {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 42%;
  transform: translateY(-50%);
  font-family: var(--home-display);
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #f4f8ff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.55);
  line-height: 1.15;
}

.learn-cover-label {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 36px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: rgba(180, 230, 255, 0.92);
}

.learn-cover-brand {
  position: absolute;
  left: 14px;
  bottom: 14px;
  font-size: 11px;
  font-weight: 600;
  color: rgba(220, 220, 220, 0.7);
}

.learn-cover--compact .learn-cover-count {
  font-size: 1.15rem;
}

.learn-cover--compact .learn-cover-label {
  bottom: 30px;
  font-size: 10px;
}

.learn-body--playlist .home-shell {
  background: #0f0f0f;
}

.learn-body--playlist .home-main.learn-playlist-page,
.learn-playlist-page {
  flex: 1 1 auto;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 20px 56px;
}

.learn-body--playlist .home-main {
  max-width: none;
  padding: 0;
}

.learn-playlist {
  display: grid;
  grid-template-columns: minmax(260px, 340px) minmax(0, 1fr);
  gap: 28px 32px;
  align-items: start;
}

.learn-playlist-aside {
  position: sticky;
  top: 72px;
  padding: 4px 4px 8px;
}

.learn-playlist-aside .learn-cover {
  margin-bottom: 18px;
  max-width: 320px;
}

.learn-playlist-eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  font-size: 12px;
  color: var(--home-muted);
}

.learn-playlist-aside h1 {
  margin: 0 0 14px;
  font-family: var(--home-display);
  font-size: clamp(1.45rem, 2.6vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1.2;
}

.learn-playlist-channel {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  color: #f0f0f0;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.learn-playlist-channel img {
  border-radius: 50%;
  background: #222;
}

.learn-playlist-channel:hover {
  color: var(--home-accent);
}

.learn-playlist-meta {
  margin: 0 0 12px;
  font-size: 13px;
  color: #aaa;
}

.learn-playlist-desc {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.5;
  color: #c8c8c8;
  max-width: 36em;
}

.learn-playlist-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.learn-playlist-actions .learn-play-all {
  flex: 1 1 100%;
  justify-content: center;
}

.learn-playlist-actions .home-btn {
  flex: 1 1 calc(50% - 5px);
  justify-content: center;
  text-align: center;
  box-sizing: border-box;
}

.learn-play-all {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: #f1f1f1;
  color: #0f0f0f;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.15s ease;
}

.learn-play-all:hover {
  background: #fff;
  transform: translateY(-1px);
}

.learn-play-all.is-disabled,
.learn-play-all[aria-disabled="true"] {
  background: #2a2a2a;
  color: #9a9a9a;
  cursor: default;
  transform: none;
}

.learn-play-all-icon {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 6px 0 6px 10px;
  border-color: transparent transparent transparent currentColor;
}

.learn-playlist-main {
  min-width: 0;
  padding-top: 2px;
}

.learn-playlist-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  margin: 0 0 10px;
  padding: 0 4px;
}

.learn-playlist-order {
  margin: 0;
  font-size: 13px;
  font-weight: 650;
  color: #e8e8e8;
}

.learn-playlist-hint {
  margin: 0;
  font-size: 12px;
  color: #888;
}

.learn-playlist-hint strong {
  color: #bbb;
  font-weight: 600;
}

.learn-playlist-stage {
  margin: 0 0 16px;
  padding: 0 0 14px;
  border-bottom: 1px solid #2a2a2a;
}

.learn-playlist-stage-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
  border: 1px solid #2a2a2a;
}

.learn-playlist-stage-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.learn-playlist-stage-title {
  margin: 10px 4px 0;
  font-size: 15px;
  font-weight: 600;
  color: #f0f0f0;
}

.learn-playlist-tracks {
  list-style: none;
  margin: 0;
  padding: 0;
}

.learn-playlist-part,
.learn-playlist-section {
  margin: 0;
  padding: 14px 10px 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #8a8a8a;
}

.learn-playlist-section {
  padding-top: 8px;
  color: #6a9bb0;
  letter-spacing: 0.04em;
}

.learn-playlist-item {
  margin: 0;
}

.learn-track {
  display: grid;
  grid-template-columns: 28px 168px minmax(0, 1fr);
  gap: 12px 14px;
  align-items: center;
  width: 100%;
  margin: 0;
  padding: 8px 10px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: background 0.12s ease;
}

div.learn-track {
  cursor: default;
}

.learn-track:hover,
.learn-track.is-active {
  background: rgba(255, 255, 255, 0.06);
}

.learn-track.is-active {
  background: rgba(79, 193, 255, 0.1);
}

.learn-track-index {
  font-size: 13px;
  font-weight: 600;
  color: #888;
  text-align: center;
}

.learn-track.is-active .learn-track-index {
  color: var(--home-accent);
}

.learn-track-thumb {
  position: relative;
  display: block;
  width: 168px;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  overflow: hidden;
  background: #1a1a1a;
  border: 1px solid #2c2c2c;
  flex-shrink: 0;
}

.learn-track-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.learn-track-thumb--soon {
  background:
    linear-gradient(135deg, #152028 0%, #1a1a1a 45%, #121820 100%);
}

.learn-track-thumb-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 10px 12px;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.55));
  pointer-events: none;
}

.learn-track-thumb--soon .learn-track-thumb-overlay {
  background: linear-gradient(180deg, rgba(10, 20, 28, 0.2), rgba(0, 0, 0, 0.45));
}

.learn-track-num {
  font-family: var(--home-display);
  font-size: 1.35rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  color: #5eead4;
  line-height: 1.1;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.55);
}

.learn-track-topic {
  margin-top: 2px;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.04em;
  color: #f5f5f5;
  text-transform: uppercase;
}

.learn-track-soon-chip {
  position: absolute;
  right: 6px;
  bottom: 6px;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #ddd;
  background: rgba(0, 0, 0, 0.72);
}

.learn-track-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.learn-track-title {
  font-size: 14px;
  font-weight: 600;
  color: #f1f1f1;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.learn-track-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
  font-size: 12px;
  color: #8f8f8f;
  line-height: 1.35;
}

.learn-track-channel {
  color: #b0b0b0;
  font-weight: 500;
}

.learn-track-sep {
  opacity: 0.6;
}

.learn-track--soon .learn-track-title {
  color: #c0c0c0;
}

.home-openip-box {
  margin: 0;
  padding: 16px 18px;
  background: var(--home-surface);
  border: 1px solid var(--home-border);
  border-radius: 6px;
}

.home-openip-box p {
  margin: 0 0 10px;
  font-size: 0.95rem;
  color: var(--home-muted);
  max-width: 42em;
}

.home-openip-box p:last-of-type {
  margin-bottom: 12px;
}

.home-openip-box strong {
  color: #e8e8e8;
  font-weight: 600;
}

@media (max-width: 900px) {
  .learn-playlist {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .learn-playlist-aside {
    position: static;
  }

  .learn-playlist-aside .learn-cover {
    max-width: 220px;
  }

  .learn-track {
    grid-template-columns: 22px 132px minmax(0, 1fr);
    gap: 10px;
    padding: 8px 6px;
  }

  .learn-track-thumb {
    width: 132px;
  }
}

@media (max-width: 620px) {
  .home-course-item--playlist {
    grid-template-columns: 1fr;
  }

  .home-course-cover-link {
    max-width: 200px;
  }

  .learn-playlist-page {
    padding: 12px 12px 40px;
  }

  .learn-track {
    grid-template-columns: 18px minmax(0, 1fr);
  }

  .learn-track-thumb {
    grid-column: 2;
    width: min(100%, 220px);
  }

  .learn-track-body {
    grid-column: 2;
  }

  .learn-track-index {
    grid-row: 1 / span 2;
    align-self: start;
    padding-top: 8px;
  }
}