/*
 * Training workspace
 * This page uses the same visual contract as the CourseOS shell:
 * blue primary actions, white work surfaces, quiet borders and compact SaaS density.
 */
.courseos-app .ts-page {
  color: var(--cos-ink);
  min-width: 0;
}

.courseos-app .ts-head,
.courseos-app .ts-section-title,
.courseos-app .ts-section > header,
.courseos-app .ts-actions,
.courseos-app .ts-row-actions,
.courseos-app .ts-learn-filter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.courseos-app .ts-head {
  margin-bottom: 22px;
}

.courseos-app .ts-head h1 {
  margin: 0 0 6px;
  color: var(--cos-ink);
  font-size: 26px;
  letter-spacing: 0;
}

.courseos-app .ts-head p,
.courseos-app .ts-section-title p {
  margin: 0;
  color: var(--cos-muted);
  font-size: 12px;
  line-height: 1.6;
}

.courseos-app .ts-head > .primary,
.courseos-app .ts-section-title > .primary {
  flex: none;
}

.courseos-app .ts-admin-layout {
  display: grid;
  grid-template-columns: minmax(260px, 312px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.courseos-app .ts-catalog {
  position: sticky;
  top: 92px;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .ts-section-title {
  margin: 0 0 13px;
}

.courseos-app .ts-section-title h2 {
  margin: 0 0 4px;
  color: var(--cos-ink);
  font-size: 16px;
}

.courseos-app .ts-section-title > span,
.courseos-app .ts-kicker {
  color: var(--cos-primary);
  font-size: 11px;
  font-weight: 800;
}

.courseos-app .ts-course-list {
  display: grid;
  gap: 8px;
  max-height: calc(100vh - 210px);
  overflow: auto;
  padding-right: 2px;
}

.courseos-app .ts-course-pick {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 11px;
  align-items: center;
  width: 100%;
  padding: 9px;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius-sm);
  background: var(--cos-surface);
  color: var(--cos-ink);
  text-align: left;
  transition: border-color .16s ease, background .16s ease, box-shadow .16s ease;
}

.courseos-app .ts-course-pick:hover {
  border-color: #b9cdfb;
  background: var(--cos-surface-soft);
}

.courseos-app .ts-course-pick.active {
  border-color: #a9c3fb;
  background: var(--cos-primary-soft);
  box-shadow: 0 0 0 2px #dce8ff;
}

.courseos-app .ts-course-pick > span {
  min-width: 0;
}

.courseos-app .ts-course-pick b,
.courseos-app .ts-course-pick small,
.courseos-app .ts-course-pick em {
  display: block;
  overflow-wrap: anywhere;
}

.courseos-app .ts-course-pick b {
  font-size: 12px;
  line-height: 1.45;
}

.courseos-app .ts-course-pick small {
  margin: 5px 0;
  color: var(--cos-muted);
  font-size: 10px;
  line-height: 1.45;
}

.courseos-app .ts-course-pick em {
  color: var(--cos-success);
  font-size: 10px;
  font-style: normal;
  font-weight: 700;
}

.courseos-app .ts-cover {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 74px;
  overflow: hidden;
  border-radius: 9px;
  background: #dce8ff;
  color: #2f63d6;
}

.courseos-app .ts-cover.cover-coral {
  background: #ffe8dd;
  color: #c86b45;
}

.courseos-app .ts-cover.cover-indigo {
  background: #e7e9ff;
  color: #6259c7;
}

.courseos-app .ts-cover.cover-lime {
  background: #eef6d9;
  color: #64833c;
}

.courseos-app .ts-cover.cover-mint {
  background: #e4f7f0;
  color: #238a6b;
}

.courseos-app .ts-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.courseos-app .ts-cover span {
  position: relative;
  z-index: 1;
  font-size: 22px;
  font-weight: 800;
}

.courseos-app .ts-detail-head {
  display: grid;
  grid-template-columns: minmax(190px, 250px) minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .ts-detail-head .ts-cover {
  aspect-ratio: 16 / 9;
}

.courseos-app .ts-detail-head h2,
.courseos-app .ts-learn-head h2 {
  margin: 6px 0;
  color: var(--cos-ink);
  font-size: 22px;
  line-height: 1.35;
}

.courseos-app .ts-detail-head p,
.courseos-app .ts-learn-head p {
  max-width: 720px;
  margin: 0 0 10px;
  color: var(--cos-ink-soft);
  font-size: 12px;
  line-height: 1.7;
}

.courseos-app .ts-detail-head small,
.courseos-app .ts-learn-head span:last-child {
  color: var(--cos-muted);
  font-size: 11px;
}

.courseos-app .ts-actions {
  justify-content: flex-start;
  flex-wrap: wrap;
  margin: 14px 0 22px;
  padding: 0 0 18px;
  border-bottom: 1px solid var(--cos-line);
}

.courseos-app .ts-actions button,
.courseos-app .ts-row-actions button,
.courseos-app .ts-file-button,
.courseos-app .ts-dialog button,
.courseos-app .ts-add-lesson,
.courseos-app .ts-back {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  cursor: pointer;
  border: 1px solid var(--cos-line-strong);
  border-radius: 9px;
  background: var(--cos-surface);
  color: var(--cos-ink-soft);
  padding: 7px 11px;
  font-size: 11px;
  font-weight: 700;
  transition: border-color .16s ease, background .16s ease, color .16s ease;
}

.courseos-app .ts-actions button:hover,
.courseos-app .ts-row-actions button:hover,
.courseos-app .ts-file-button:hover,
.courseos-app .ts-dialog button:hover,
.courseos-app .ts-add-lesson:hover,
.courseos-app .ts-back:hover {
  border-color: #b9cdfa;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
}

.courseos-app .ts-actions .ts-danger {
  margin-left: auto;
  color: var(--cos-danger);
}

.courseos-app .ts-file-button {
  overflow: hidden;
}

.courseos-app .ts-file-button input {
  position: absolute;
  inset: 0;
  width: 100%;
  opacity: 0;
  cursor: pointer;
}

.courseos-app .ts-uploading {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 2;
  min-width: 180px;
  padding: 8px 10px;
  border: 1px solid var(--cos-line);
  border-radius: 8px;
  background: var(--cos-surface);
  color: var(--cos-primary);
  box-shadow: var(--cos-shadow);
  white-space: nowrap;
}

.courseos-app .ts-section {
  margin: 13px 0;
  overflow: hidden;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .ts-section > header {
  align-items: flex-start;
  padding: 15px 17px;
  background: var(--cos-surface-soft);
  border-bottom: 1px solid var(--cos-line);
}

.courseos-app .ts-section header span {
  color: var(--cos-primary);
  font-size: 10px;
  font-weight: 800;
}

.courseos-app .ts-section h3 {
  margin: 4px 0;
  color: var(--cos-ink);
  font-size: 15px;
}

.courseos-app .ts-section header p {
  margin: 0;
  color: var(--cos-muted);
  font-size: 11px;
  line-height: 1.5;
}

.courseos-app .ts-row-actions {
  justify-content: flex-end;
  flex-wrap: wrap;
}

.courseos-app .ts-row-actions button,
.courseos-app .ts-row-actions .ts-file-button {
  min-height: 29px;
  padding: 5px 8px;
  font-size: 10px;
}

.courseos-app .ts-lessons {
  background: var(--cos-surface);
}

.courseos-app .ts-lesson {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 13px 17px;
  border-bottom: 1px solid var(--cos-line);
}

.courseos-app .ts-lesson:last-child {
  border-bottom: 0;
}

.courseos-app .ts-lesson-index {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
  font-size: 10px;
  font-weight: 800;
}

.courseos-app .ts-lesson-info {
  min-width: 0;
}

.courseos-app .ts-lesson-info b,
.courseos-app .ts-lesson-info span {
  display: block;
  overflow-wrap: anywhere;
}

.courseos-app .ts-lesson-info b {
  color: var(--cos-ink);
  font-size: 12px;
}

.courseos-app .ts-lesson-info span,
.courseos-app .ts-lesson-info p {
  margin: 4px 0 0;
  color: var(--cos-muted);
  font-size: 10px;
  line-height: 1.5;
}

.courseos-app .ts-add-lesson {
  margin: 12px 17px;
  border-style: dashed;
  color: var(--cos-primary);
}

.courseos-app .ts-empty,
.courseos-app .ts-loading,
.courseos-app .ts-error {
  padding: 22px;
  color: var(--cos-muted);
  font-size: 12px;
  line-height: 1.7;
}

.courseos-app .ts-wide {
  min-height: 260px;
  display: grid;
  place-items: center;
  border: 1px dashed var(--cos-line-strong);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
}

.courseos-app .ts-error {
  margin: 0 0 14px;
  border: 1px solid #f3c7cf;
  border-radius: var(--cos-radius-sm);
  background: #fff4f6;
  color: var(--cos-danger);
}

.ts-overlay {
  position: fixed;
  z-index: 400;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(30, 41, 59, .42);
  backdrop-filter: blur(4px);
}

.ts-dialog {
  width: min(560px, 100%);
  max-height: 90vh;
  overflow: auto;
  padding: 22px;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  color: var(--cos-ink);
  box-shadow: var(--cos-shadow-lg);
}

.ts-dialog header,
.ts-dialog footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.ts-dialog h2 {
  margin: 0;
  color: var(--cos-ink);
  font-size: 19px;
}

.ts-dialog header button {
  width: 32px;
  min-height: 32px;
  padding: 0;
  font-size: 18px;
}

.ts-video-dialog {
  width: min(960px, 100%);
}

.ts-video-dialog .video-js,
.ts-video-dialog video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-top: 18px;
  background: #101827;
}

.ts-video-dialog p {
  margin-bottom: 0;
  color: var(--cos-muted);
  font-size: 12px;
}

.ts-form-fields {
  display: grid;
  gap: 13px;
  padding: 20px 0;
}

.ts-form-fields label {
  display: grid;
  gap: 6px;
  color: var(--cos-ink-soft);
  font-size: 12px;
  font-weight: 700;
}

.ts-form-fields input,
.ts-form-fields textarea,
.ts-form-fields select {
  box-sizing: border-box;
  width: 100%;
  padding: 10px 11px;
  border: 1px solid var(--cos-line-strong);
  border-radius: 9px;
  background: var(--cos-surface);
  color: var(--cos-ink);
  font: inherit;
  font-weight: 400;
  outline: 0;
}

.ts-form-fields input:focus,
.ts-form-fields textarea:focus,
.ts-form-fields select:focus {
  border-color: var(--cos-primary);
  box-shadow: 0 0 0 3px var(--cos-primary-soft);
}

.ts-form-error {
  color: var(--cos-danger);
  font-size: 12px;
}

.courseos-app .ts-dialog footer {
  justify-content: flex-end;
}

.courseos-app .ts-dialog footer button.primary {
  border-color: var(--cos-primary);
  background: var(--cos-primary);
  color: #fff;
}

.courseos-app .ts-dialog footer button.primary:hover {
  border-color: var(--cos-primary-strong);
  background: var(--cos-primary-strong);
  color: #fff;
}

.courseos-app .ts-learn-filter {
  margin: 18px 0;
  color: var(--cos-muted);
  font-size: 12px;
}

.courseos-app .ts-learn-filter select {
  margin-left: 8px;
  padding: 9px 12px;
  border: 1px solid var(--cos-line-strong);
  border-radius: 9px;
  color: var(--cos-ink-soft);
}

.courseos-app .ts-learn-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
}

.courseos-app .ts-learn-card {
  overflow: hidden;
  padding: 0;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  color: var(--cos-ink);
  box-shadow: var(--cos-shadow-sm);
  text-align: left;
  transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}

.courseos-app .ts-learn-card:hover {
  border-color: #b9cdfa;
  box-shadow: var(--cos-shadow);
  transform: translateY(-2px);
}

.courseos-app .ts-learn-card .ts-cover {
  aspect-ratio: 16 / 9;
  border-radius: 0;
}

.courseos-app .ts-learn-card > div:last-child {
  padding: 15px;
}

.courseos-app .ts-learn-card span,
.courseos-app .ts-learn-card p {
  color: var(--cos-muted);
  font-size: 11px;
}

.courseos-app .ts-learn-card h2 {
  margin: 7px 0;
  color: var(--cos-ink);
  font-size: 15px;
  line-height: 1.45;
}

.courseos-app .ts-learn-card p {
  min-height: 36px;
  line-height: 1.6;
}

.courseos-app .ts-learn-card footer {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding-top: 11px;
  border-top: 1px solid var(--cos-line);
  font-size: 11px;
}

.courseos-app .ts-learn-card footer b {
  color: var(--cos-primary);
}

.courseos-app .ts-back {
  margin-bottom: 15px;
  color: var(--cos-primary);
}

.courseos-app .ts-learning-layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  margin-top: 22px;
}

.courseos-app .ts-chapter-list {
  overflow: hidden;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .ts-chapter-list section {
  padding: 13px;
  border-bottom: 1px solid var(--cos-line);
}

.courseos-app .ts-chapter-list section:last-child {
  border-bottom: 0;
}

.courseos-app .ts-chapter-list h3 {
  margin: 0;
  color: var(--cos-ink);
  font-size: 13px;
}

.courseos-app .ts-chapter-list p {
  margin: 5px 0 8px;
  color: var(--cos-muted);
  font-size: 10px;
  line-height: 1.5;
}

.courseos-app .ts-chapter-list button {
  display: flex;
  align-items: center;
  gap: 7px;
  width: 100%;
  padding: 10px 8px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--cos-ink-soft);
  text-align: left;
  font-size: 11px;
}

.courseos-app .ts-chapter-list button:hover,
.courseos-app .ts-chapter-list button.active {
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
}

.courseos-app .ts-chapter-list button b {
  flex: 1;
  min-width: 0;
}

.courseos-app .ts-chapter-list button small {
  color: var(--cos-muted);
}

.courseos-app .ts-play-area {
  min-width: 0;
}

.courseos-app .ts-play-area .video-js,
.courseos-app .ts-play-area video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #101827;
}

.courseos-app .ts-lesson-copy {
  padding: 16px 0;
}

.courseos-app .ts-lesson-copy span {
  color: var(--cos-primary);
  font-size: 10px;
  font-weight: 800;
}

.courseos-app .ts-lesson-copy h2 {
  margin: 6px 0;
  color: var(--cos-ink);
  font-size: 18px;
}

.courseos-app .ts-lesson-copy p,
.courseos-app .ts-lesson-copy small {
  color: var(--cos-muted);
  font-size: 11px;
  line-height: 1.6;
}

@media (max-width: 1100px) {
  .courseos-app .ts-admin-layout {
    grid-template-columns: minmax(230px, 280px) minmax(0, 1fr);
  }

  .courseos-app .ts-learn-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .courseos-app .ts-catalog {
    position: static;
  }

  .courseos-app .ts-admin-layout,
  .courseos-app .ts-learning-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .courseos-app .ts-course-list {
    display: flex;
    max-height: none;
    overflow-x: auto;
    padding-bottom: 3px;
  }

  .courseos-app .ts-course-pick {
    flex: 0 0 min(290px, 78vw);
  }

  .courseos-app .ts-chapter-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 10px;
  }

  .courseos-app .ts-chapter-list section {
    flex: 0 0 min(260px, 75vw);
    border: 1px solid var(--cos-line);
    border-radius: 10px;
  }
}

@media (max-width: 620px) {
  .courseos-app .ts-head {
    display: block;
  }

  .courseos-app .ts-head > .primary {
    margin-top: 12px;
  }

  .courseos-app .ts-section-title {
    align-items: flex-start;
  }

  .courseos-app .ts-section-title > .primary {
    white-space: nowrap;
  }

  .courseos-app .ts-detail-head,
  .courseos-app .ts-learn-head {
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 12px;
    align-items: start;
    padding: 13px;
  }

  .courseos-app .ts-detail-head .ts-cover,
  .courseos-app .ts-learn-head .ts-cover {
    min-height: 68px;
    aspect-ratio: 1;
  }

  .courseos-app .ts-detail-head .ts-cover span,
  .courseos-app .ts-learn-head .ts-cover span {
    font-size: 18px;
  }

  .courseos-app .ts-detail-head h2,
  .courseos-app .ts-learn-head h2 {
    font-size: 17px;
  }

  .courseos-app .ts-actions .ts-danger {
    margin-left: 0;
  }

  .courseos-app .ts-lesson {
    grid-template-columns: 32px minmax(0, 1fr);
  }

  .courseos-app .ts-lesson .ts-row-actions {
    grid-column: 2;
    justify-content: flex-start;
  }

  .courseos-app .ts-learn-grid {
    grid-template-columns: 1fr;
  }

  .ts-dialog {
    padding: 17px;
  }
}