.cat {
  --bg:         var(--lec-bg);
  --surface:    var(--lec-surface);
  --border:     var(--lec-border);
  --text:       var(--lec-text);
  --text-muted: var(--lec-text-muted);
  --accent:     var(--lec-accent);

  background: var(--bg);
  min-height: 100vh;
  padding: 28px 20px 64px;
  color: var(--text);
  box-sizing: border-box;
}

.lec { font-family: inherit; background: #001119;}

.lec__hero {
  background: #03202f;
  padding: 28px 32px 32px;
  border-radius: 12px;
  margin-bottom: 24px;
}

.lec__breadcrumb {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: #8BA0AD;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.lec__breadcrumb a { color: #8BA0AD; text-decoration: none; }
.lec__breadcrumb a:hover { color: #FF6900; }
.lec__breadcrumb span { color: #FF6900; font-weight: 500; }
.lec__breadcrumb i { font-size: 12px; color: #4a6070; }

.lec__hero-tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,105,0,0.12);
  border: 1px solid rgba(255,105,0,0.25);
  color: #FF6900;
  font-size: 11px; font-weight: 600;
  padding: 4px 12px; border-radius: 99px;
  margin-bottom: 14px;
  letter-spacing: 0.05em; text-transform: uppercase;
}

.lec__hero-title {
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 700; line-height: 1.15;
  color: #E8EEF2; margin-bottom: 16px;
  text-align: left;
}

.lec__hero-meta {
  display: flex; align-items: center; gap: 16px;
  flex-wrap: wrap;
}
.lec__hero-meta-item {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: #8BA0AD;
}
.lec__hero-meta-item i { font-size: 14px; color: white;}

.lec__grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 20px; align-items: start;
}
@media (max-width: 820px) {
  .lec__grid { grid-template-columns: 1fr; }
}

.lec__video-wrap {
  background: #000c12;
  border-radius: 12px; overflow: hidden;
  aspect-ratio: 16/9;
  border: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 20px;
}
.lec__video-wrap iframe {
  width: 100%; height: 100%; border: none;
}

.lec__card {
  background: #00202F;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 12px; padding: 16px;
  margin-bottom: 14px;
}
.lec__card-label {
  font-size: 10px; font-weight: 700;
  color: #4a6070; text-transform: uppercase;
  letter-spacing: 0.08em; margin-bottom: 12px;
}

.lec__speaker {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 10px;
}
.lec__speaker:last-child { margin-bottom: 0; }
.lec__speaker-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255,105,0,0.15);
  border: 1px solid rgba(255,105,0,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: #FF6900;
  flex-shrink: 0;
}
.lec__speaker-name {
  font-size: 14px; font-weight: 500;
  color: #E8EEF2; margin-bottom: 2px;
}
.lec__speaker-role { font-size: 12px; color: #8BA0AD; line-height: 1.3; }

.lec__desc { font-size: 14px; line-height: 1.75; color: #C4D0D8; }

.lec__resource-item {
  display: flex; align-items: center; gap: 12px;
  background: #001119;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px; padding: 12px 14px;
  margin-bottom: 8px;
  text-decoration: none;
  transition: border-color 0.15s;
}
.lec__resource-item:hover { border-color: rgba(255,105,0,0.4); }
.lec__resource-name { font-size: 14px; font-weight: 500; color: #E8EEF2; margin-bottom: 2px; }
.lec__resource-type { font-size: 12px; color: #8BA0AD; }


.cat__breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.cat__breadcrumb a { color: var(--text-muted); text-decoration: none; }
.cat__breadcrumb a:hover { color: var(--accent); }
.cat__breadcrumb-sep { opacity: 0.4; color: white;}
.cat__breadcrumb-current { color: var(--text); }

.cat__header {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 10px;
}
.cat__header-icon {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  background: rgba(255,105,0,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: var(--accent);
  flex-shrink: 0;
}
.cat__header-title {
  font-size: 35px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 6px;
  text-align: left;
}
.cat__header-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}
@media (max-width: 600px) {
  .cat__header-title { font-size: 22px; }
  .cat__header { gap: 12px; }
}

.cat__module {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 18px;
  overflow: hidden;
}
.cat__module-header {
  padding: 20px 22px;
  border-bottom: 1px solid var(--border);
}
.cat__module-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 4px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.cat__module-num {
  font-size: 11px;
  font-weight: 600;
  background: rgba(255,105,0,0.12);
  color: var(--accent);
  padding: 2px 9px;
  border-radius: 99px;
  flex-shrink: 0;
}
.cat__module-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin: 6px 0 0;
  line-height: 1.5;
}

.cat__lesson-list { display: flex; flex-direction: column; }
.cat__lesson-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: background 0.15s;
}
.cat__lesson-item:last-child { border-bottom: none; }
.cat__lesson-item:hover { background: rgba(255,105,0,0.06); }

.cat__lesson-play {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,105,0,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s;
}
.cat__lesson-item:hover .cat__lesson-play { background: var(--accent); }
.cat__lesson-item:hover .cat__lesson-play .cat__play-icon { color: #fff !important; }
.cat__play-icon { color: var(--accent); font-size: 15px; margin-left: 2px; }

.cat__lesson-info { flex: 1; min-width: 0; }
.cat__lesson-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin: 0 0 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cat__lesson-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.cat__empty-module {
  padding: 24px 22px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}
.cat__no-modules {
  text-align: center;
  padding: 64px 20px;
  color: var(--text-muted);
  font-size: 15px;
}
i.ti.ti-school{ color: #FF6900;}

i.ti.ti-clock{ color: white;}

i.ti.ti-message-circle { color: white;}