.course-shell {
  min-height: 65vh;
}
.course-shell h1,
.course-shell h2,
.course-admin h2,
.course-admin h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.025em;
}
.course-shell h1 {
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1.08;
  margin: 18px 0 24px;
}
.course-shell h2 {
  font-size: 28px;
  margin: 30px 0 14px;
}
.course-hero {
  padding-top: 85px;
  padding-bottom: 60px;
}
.course-hero h1 {
  font-size: clamp(45px, 7vw, 88px);
  max-width: 850px;
}
.course-hero h1 em {
  color: var(--accent);
  font-weight: 500;
}
.course-hero p,
.course-lead {
  font-size: 19px;
  color: var(--text-dim);
  max-width: 680px;
}
.course-hero-meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 30px;
}
.course-hero-meta span:before {
  content: "✓";
  color: var(--accent);
  margin-right: 8px;
}
.course-catalogue {
  padding-bottom: 80px;
}
.course-section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 25px;
}
.course-section-heading h2 {
  margin: 0;
}
.course-section-heading a,
.course-back,
.course-footer a:hover,
.auth-links button {
  color: var(--accent);
}
.course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.course-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  overflow: hidden;
  transition:
    border-color 0.2s,
    transform 0.2s;
}
.course-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}
.course-card img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.course-card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}
.course-card h2,
.course-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 25px;
  line-height: 1.2;
}
.course-card p {
  color: var(--text-dim);
  font-size: 14px;
}
.course-card-price {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}
.course-card small {
  color: var(--text-dim);
}
.course-empty {
  grid-column: 1/-1;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 65px 35px;
  background: var(--bg-card);
}
.course-empty h2 {
  margin: 12px 0;
}
.course-empty p {
  color: var(--text-dim);
  max-width: 550px;
  margin: 15px 0;
}
.course-footer {
  padding: 45px 0;
  margin-top: 60px;
  border-top: 1px solid var(--border);
}
.course-footer p {
  color: var(--text-dim);
  margin: 12px 0;
}
.course-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 13px;
}
.course-detail {
  padding-top: 50px;
}
.course-back {
  display: inline-block;
  margin-bottom: 30px;
  font-size: 14px;
}
.course-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 350px;
  gap: 60px;
  align-items: start;
}
.course-purchase {
  position: sticky;
  top: 100px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
}
.course-cover {
  aspect-ratio: 16/9;
  width: 100%;
  object-fit: cover;
}
.course-purchase-content {
  padding: 25px;
}
.course-purchase h2 {
  margin: 15px 0;
}
.course-purchase .eyebrow {
  font-size: 10px;
  letter-spacing: 0.06em;
}
.course-purchase .btn {
  width: 100%;
  margin: 15px 0;
}
.course-fine {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.6;
  margin-top: 12px;
}
.course-benefits {
  padding-left: 18px;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 2;
}
.course-rich {
  line-height: 1.85;
  color: var(--text-dim);
  overflow-wrap: anywhere;
}
.course-rich p,
.course-rich ul,
.course-rich ol {
  margin: 16px 0;
}
.course-rich ul,
.course-rich ol {
  padding-left: 25px;
}
.course-rich h2,
.course-rich h3,
.course-rich strong {
  color: var(--text);
}
.course-rich a {
  color: var(--accent);
  text-decoration: underline;
}
.course-lines {
  white-space: pre-line;
  color: var(--text-dim);
  line-height: 1.9;
}
.curriculum details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 12px 0;
  background: var(--bg-card);
}
.curriculum summary {
  padding: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 15px;
}
.curriculum summary small {
  margin-left: auto;
  color: var(--text-dim);
  white-space: nowrap;
}
.course-number {
  font-family: var(--font-mono);
  color: var(--accent);
}
.curriculum ul {
  list-style: none;
  border-top: 1px solid var(--border);
}
.curriculum li {
  padding: 14px 20px;
  display: flex;
  gap: 14px;
  align-items: center;
  font-size: 14px;
}
.curriculum li > span {
  color: var(--accent);
}
.curriculum li small {
  margin-left: auto;
  color: var(--text-dim);
  white-space: nowrap;
}
.course-account {
  padding-top: 60px;
  padding-bottom: 40px;
}
.course-auth-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 1000px;
  margin: 30px auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.course-auth-panel > div,
.course-auth-panel > aside {
  padding: 40px;
  background: var(--bg-card);
}
.course-auth-panel > aside {
  background: linear-gradient(
    150deg,
    rgba(34, 211, 238, 0.1),
    rgba(226, 58, 160, 0.08)
  );
}
.course-auth-panel h2 {
  margin-top: 0;
}
.course-auth-panel p {
  color: var(--text-dim);
  margin-bottom: 24px;
}
.course-shell label,
.course-admin label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin: 16px 0 7px;
}
.course-shell input,
.course-shell select,
.course-admin input,
.course-admin select,
.course-admin textarea {
  width: 100%;
  min-width: 0;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 12px;
  font: inherit;
}
.course-shell button,
.course-admin button {
  cursor: pointer;
}
.course-shell button:disabled,
.course-admin button:disabled {
  opacity: 0.5;
  cursor: wait;
}
.course-shell input:focus,
.course-shell select:focus,
.course-admin input:focus,
.course-admin select:focus,
.course-admin textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.course-shell [role="status"],
.course-admin [role="status"] {
  margin: 16px 0;
  overflow-wrap: anywhere;
}
.course-shell .btn:focus-visible,
.lesson-sidebar button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.course-auth-panel form .btn {
  margin-top: 22px;
  width: 100%;
}
.auth-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.auth-links button {
  background: none;
  border: 0;
  text-decoration: underline;
  font-size: 12px;
}
.course-orders {
  overflow-x: auto;
}
.course-orders table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}
.course-orders td,
.course-orders th {
  padding: 14px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.course-learning {
  padding-top: 35px;
}
.learning-grid {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 35px;
}
.lesson-sidebar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  align-self: start;
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.lesson-sidebar h2 {
  font-size: 22px;
}
.lesson-sidebar h3 {
  font-size: 13px;
  margin: 25px 0 10px;
  color: var(--text-dim);
}
.lesson-sidebar button {
  display: block;
  text-align: left;
  width: 100%;
  background: none;
  border: 1px solid transparent;
  color: var(--text-dim);
  padding: 10px;
  border-radius: 5px;
  font: inherit;
  font-size: 13px;
}
.lesson-sidebar button.active {
  background: rgba(34, 211, 238, 0.08);
  border-color: var(--border-strong);
  color: var(--accent);
}
.lesson-sidebar button:hover {
  color: var(--text);
}
.lesson-stage h1 {
  font-size: clamp(28px, 3.5vw, 42px);
}
.lesson-actions {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin: 35px 0;
  border-top: 1px solid var(--border);
  padding-top: 25px;
}
.lesson-stage mux-player {
  width: 100%;
  aspect-ratio: 16/9;
  --media-accent-color: var(--accent);
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
}
.course-download {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid var(--border);
  padding: 15px;
  border-radius: var(--radius);
  margin-top: 10px;
}
.course-download span {
  overflow-wrap: anywhere;
  font-size: 14px;
}
.course-progress-track {
  height: 5px;
  background: var(--bg);
  border-radius: 5px;
  overflow: hidden;
  margin: 10px 0;
}
.course-progress-track span {
  display: block;
  height: 100%;
  background: var(--accent);
}
.admin-tabs {
  display: flex;
  gap: 12px;
  margin: 25px 0;
}
.admin-tabs [aria-selected="true"] {
  border-color: var(--accent);
  color: var(--accent);
}
.course-admin {
  margin-top: 25px;
}
.course-admin-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 25px;
}
.course-admin-list,
.course-admin-editor {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--bg-card);
}
.course-admin-list button {
  display: block;
  width: 100%;
  margin: 10px 0;
  text-align: left;
}
.course-admin-list small {
  display: block;
  color: var(--text-dim);
  margin-top: 4px;
}
.course-admin-list button.active {
  border-color: var(--accent);
}
.course-admin-editor h2 {
  font-size: 28px;
}
.course-admin-editor textarea {
  min-height: 100px;
}
.course-admin-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.course-admin-module {
  border: 1px solid var(--border-strong);
  padding: 20px;
  margin: 20px 0;
  border-radius: var(--radius);
}
.course-admin-lesson {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 20px;
}
.course-admin-tools {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 12px 0;
}
.course-admin-tools button {
  font-size: 12px;
  padding: 8px 12px;
}
.course-admin small {
  color: var(--text-dim);
}
.course-admin-video-state {
  display: block;
  padding: 12px;
  background: var(--bg);
  font-size: 13px;
  margin: 12px 0;
}
.course-admin-status {
  border: 1px solid var(--border);
  padding: 16px;
  margin-bottom: 20px;
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: 13px;
}
.course-admin .ql-toolbar,
.course-admin .ql-container {
  border-color: var(--border-strong);
}
.course-admin .ql-editor {
  min-height: 180px;
  color: var(--text);
}
.course-admin mux-uploader {
  --progress-bar-fill-color: var(--accent);
  --progress-bar-background-color: var(--bg);
  --progress-bar-height: 6px;
  display: block;
  margin: 15px 0;
  color-scheme: dark;
}
.course-admin-cover {
  max-width: 280px;
  max-height: 160px;
  object-fit: cover;
  margin: 15px 0;
}
.course-preview {
  border: 1px solid var(--accent);
  padding: 25px;
  margin: 20px 0;
}
.course-error {
  color: #ffacb6;
}
.course-ok {
  color: var(--accent);
}
[hidden] {
  display: none !important;
}
@media (max-width: 1100px) {
  .course-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .course-detail-grid {
    gap: 30px;
    grid-template-columns: minmax(0, 1fr) 310px;
  }
  .course-admin-layout {
    grid-template-columns: 190px minmax(0, 1fr);
  }
}
@media (max-width: 760px) {
  .course-hero {
    padding-top: 45px;
    padding-bottom: 40px;
  }
  .course-grid,
  .course-detail-grid,
  .course-auth-panel,
  .learning-grid,
  .course-admin-layout,
  .course-admin-row {
    grid-template-columns: 1fr;
  }
  .course-purchase,
  .lesson-sidebar {
    position: static;
    max-height: none;
  }
  .course-detail-grid > aside {
    grid-row: 1;
  }
  .course-auth-panel > div,
  .course-auth-panel > aside {
    padding: 25px;
  }
  .course-auth-panel > aside {
    display: none;
  }
  .course-section-heading {
    align-items: flex-start;
    flex-wrap: wrap;
  }
  .curriculum li small {
    display: none;
  }
  .course-admin-list {
    max-height: 230px;
    overflow: auto;
  }
  .course-admin-editor {
    padding: 15px;
  }
  .course-admin-module {
    padding: 12px;
  }
  .lesson-sidebar nav {
    max-height: 260px;
    overflow: auto;
  }
  .course-hero-meta {
    gap: 12px;
  }
  .course-shell .nav-links {
    display: none;
  }
  .course-hero h1 {
    font-size: 48px;
  }
}

.course-admin .eyebrow {
  overflow-wrap: anywhere;
  max-width: 100%;
}
.course-admin-editor {
  min-width: 0;
}
.course-admin mux-player {
  width: 100%;
  aspect-ratio: 16/9;
}