/* Training tab — VLC-inspired education player */

#v-training {
  --edu-touch: 44px;
}

.edu-app {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  min-height: calc(100vh - 220px);
  border: 1px solid var(--card-edge);
  border-radius: 12px;
  overflow: hidden;
  background: var(--card);
}

.edu-sidebar {
  border-right: 1px solid var(--card-edge);
  background: var(--inset);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.edu-sidebar-head {
  padding: 16px;
  border-bottom: 1px solid var(--card-edge);
}

.edu-sidebar-head h3 {
  margin: 0 0 10px;
  font-size: 14px;
}

.edu-search {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--card-edge);
  background: var(--card);
  color: var(--text);
  font-size: 16px;
  min-height: var(--edu-touch);
}

.edu-lesson-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  -webkit-overflow-scrolling: touch;
}

.edu-section-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 12px 8px 6px;
}

.edu-lesson-row {
  width: 100%;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px;
  margin-bottom: 4px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  min-height: var(--edu-touch);
}

.edu-lesson-row:hover,
.edu-lesson-row.active {
  background: rgba(99, 102, 241, 0.15);
}

.edu-lesson-row.done .edu-lesson-name {
  opacity: 0.85;
}

.edu-lesson-icon {
  font-size: 14px;
  width: 20px;
  flex-shrink: 0;
}

.edu-lesson-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.edu-lesson-name {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
}

.edu-lesson-dur {
  font-size: 11px;
  color: var(--muted);
}

.edu-main {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.edu-main-head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.edu-back-btn {
  display: none;
  min-width: var(--edu-touch);
  min-height: var(--edu-touch);
  border: 1px solid var(--card-edge);
  border-radius: 8px;
  background: var(--inset);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
}

.edu-main-head h2 {
  margin: 0;
  font-size: 20px;
  font-family: 'Outfit', sans-serif;
}

.edu-bot-hint {
  margin: 6px 0 0;
  font-size: 12px;
  color: var(--accent);
}

.edu-player-wrap {
  position: relative;
  background: #000;
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  max-height: min(56vh, 520px);
}

.edu-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.edu-video.hidden {
  display: none;
}

.edu-no-video {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
  background: var(--inset);
}

.edu-no-video.hidden {
  display: none;
}

.edu-file-label {
  margin-top: 16px;
  padding: 12px 20px;
  border-radius: 8px;
  border: 1px dashed var(--card-edge);
  cursor: pointer;
  font-size: 13px;
  min-height: var(--edu-touch);
  display: inline-flex;
  align-items: center;
}

.edu-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.85);
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
}

.edu-controls button {
  min-width: var(--edu-touch);
  min-height: 36px;
  border: none;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  cursor: pointer;
  font-size: 13px;
}

.edu-controls button.active {
  background: rgba(247, 121, 44, 0.5);
}

.edu-controls #edu-seek {
  flex: 1;
  min-width: 80px;
}

.edu-time {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.8);
  white-space: nowrap;
}

.edu-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
}

.edu-instructor-banner {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px;
  border-radius: 10px;
  background: var(--inset);
  border: 1px solid var(--card-edge);
}

.edu-instructor-banner.hidden {
  display: none;
}

.edu-instructor-photo {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
}

.edu-instructor-name {
  font-weight: 700;
  font-size: 15px;
}

.edu-instructor-tag {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
  line-height: 1.4;
}

.edu-lesson-script {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.edu-script-heading {
  margin: 20px 0 10px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
}

.edu-key-points {
  margin: 0 0 16px;
  padding-left: 20px;
}

.edu-key-points li {
  margin-bottom: 8px;
}

.edu-script p {
  margin: 0 0 12px;
}

.edu-script-cue {
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
}

.edu-lesson-poster {
  max-width: 200px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.edu-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.edu-tag {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--inset);
  border: 1px solid var(--card-edge);
  color: var(--muted);
}

.edu-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.edu-shortcut-hint {
  font-size: 11px;
  color: var(--faint);
  margin: 0;
}

.edu-status-bar {
  font-size: 12px;
  color: var(--muted);
  padding: 8px 16px;
  border-top: 1px solid var(--card-edge);
}

@media (max-width: 900px) {
  .edu-app {
    grid-template-columns: 1fr;
    min-height: calc(100dvh - 160px);
  }

  .edu-sidebar {
    display: flex;
  }

  .edu-app.mobile-detail .edu-sidebar {
    display: none;
  }

  .edu-back-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .edu-controls button {
    min-height: var(--edu-touch);
  }
}