/* BENTECH video library + learning player */
.video-library{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.video-card{display:block;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:.2s ease;box-shadow:0 8px 28px rgba(16,34,53,.04)}.video-card:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(16,34,53,.1)}.video-thumb{position:relative;aspect-ratio:16/9;background:#102235;overflow:hidden}.video-thumb img{width:100%;height:100%;object-fit:cover;display:block}.video-thumb:after{content:'▶';position:absolute;left:18px;bottom:16px;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#22A53A;color:white;font-size:15px;box-shadow:0 8px 22px rgba(0,0,0,.25)}.video-card-body{padding:16px}.video-card h3{margin:6px 0 7px;font-size:16px;line-height:1.35;color:var(--navy)}.video-card p{margin:0;color:var(--muted);font-size:12px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.video-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:10px;color:var(--muted)}.library-empty{grid-column:1/-1;border:1px dashed #cfdad2;border-radius:18px;padding:42px;text-align:center;color:var(--muted);background:#fbfdfb}.watch-page{background:#f5f8f6;min-height:100vh}.watch-shell{width:min(1500px,calc(100% - 30px));margin:auto;padding:22px 0 50px}.watch-top{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:16px}.watch-grid{display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:18px;align-items:start}.player-card{background:#07111d;border-radius:20px;overflow:hidden;box-shadow:0 24px 60px rgba(5,16,28,.18)}.player-ratio{position:relative;aspect-ratio:16/9;background:#000}.player-ratio iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.watch-info{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;margin-top:14px}.watch-info h1{font-size:clamp(25px,3vw,38px);line-height:1.15;letter-spacing:-1.4px;color:var(--navy);margin:7px 0 11px}.watch-description{white-space:pre-line;color:var(--muted);font-size:13px;line-height:1.7}.watch-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:16px}.side-learning{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;position:sticky;top:92px;max-height:calc(100vh - 112px);display:flex;flex-direction:column}.side-tabs{display:flex;border-bottom:1px solid var(--line);padding:8px 8px 0}.side-tabs button{flex:1;border:0;background:transparent;padding:11px 8px;font-size:11px;font-weight:850;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent}.side-tabs button.active{color:var(--green);border-color:var(--green)}.tab-panel{display:none;overflow:auto;padding:12px}.tab-panel.active{display:block}.chapter-item{display:grid;grid-template-columns:60px 1fr;gap:10px;padding:11px;border-radius:12px;cursor:pointer;border:1px solid transparent}.chapter-item:hover{background:var(--green-soft);border-color:#d9efde}.chapter-time{color:var(--green);font-weight:900;font-size:11px}.chapter-item b{font-size:12px;color:var(--navy);display:block}.chapter-item p{font-size:10px;color:var(--muted);line-height:1.45;margin:4px 0 0}.resource-item,.quiz-item{border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:9px}.resource-item b,.quiz-item b{font-size:11px;color:var(--navy)}.resource-item p,.quiz-item p{font-size:10px;color:var(--muted);line-height:1.5}.related{margin-top:18px}.related h2{font-size:20px;color:var(--navy);margin:0 0 12px}.related-list{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.related-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}.related-card img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}.related-card b{display:block;padding:10px;font-size:11px;line-height:1.4}.ai-state{display:inline-flex;align-items:center;gap:7px;padding:6px 9px;border-radius:999px;background:var(--green-soft);color:var(--green-dark);font-size:10px;font-weight:850}.ai-state.failed{background:#fff1f0;color:#b42318}.focus-mode .watch-grid{grid-template-columns:1fr}.focus-mode .side-learning{display:none}.focus-mode .watch-shell{width:min(1700px,calc(100% - 24px))}.yt-admin-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:16px}.video-admin-list{display:grid;gap:8px;max-height:570px;overflow:auto}.video-admin-item{display:grid;grid-template-columns:86px 1fr auto;gap:10px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:9px}.video-admin-item img{width:86px;aspect-ratio:16/9;object-fit:cover;border-radius:8px}.video-admin-item b{font-size:11px;display:block;color:var(--navy)}.video-admin-item small{font-size:9px;color:var(--muted)}.video-admin-actions{display:flex;gap:6px;align-items:center}.status-dot{font-size:9px;font-weight:850;padding:5px 7px;border-radius:999px;background:var(--green-soft);color:var(--green-dark)}.status-dot.failed{background:#fff1f0;color:#b42318}.sync-note{font-size:10px;color:var(--muted);line-height:1.5;margin-top:9px}@media(max-width:1050px){.watch-grid{grid-template-columns:1fr}.side-learning{position:static;max-height:none}.video-library{grid-template-columns:repeat(2,1fr)}.related-list{grid-template-columns:repeat(2,1fr)}.yt-admin-grid{grid-template-columns:1fr}}@media(max-width:600px){.video-library,.related-list{grid-template-columns:1fr}.watch-shell{width:min(100% - 16px,1500px);padding-top:10px}.watch-top{align-items:flex-start}.watch-top .btn{padding:9px 11px}.watch-info{padding:16px}.video-admin-item{grid-template-columns:70px 1fr}.video-admin-item img{width:70px}.video-admin-actions{grid-column:1/-1}}