/* Lecture section only. Keep existing media lazy loading and source links. */
#giang-duong{--lecture-muted:#526457;--lecture-line:#d0d9c7;padding:48px 0;scroll-margin-top:24px}
#giang-duong .lecture-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}
#giang-duong .lecture-heading .eyebrow{font-size:11px;letter-spacing:1.5px}
#giang-duong .lecture-heading h2{font:400 clamp(32px,3.6vw,46px)/1.2 var(--serif);letter-spacing:-1px;margin:8px 0}
#giang-duong .lecture-heading p{font-size:15px;line-height:1.6;color:var(--lecture-muted);margin:0}
#giang-duong .lecture-total{font-size:13px;color:var(--lecture-muted);white-space:nowrap}
#giang-duong .lecture-player{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.4fr);gap:24px;align-items:center;padding:18px;background:#fbfaf4;border:1px solid var(--lecture-line);border-radius:9px;scroll-margin-top:24px}
#giang-duong .lecture-screen{width:100%;aspect-ratio:16/9;border-radius:5px}
#giang-duong .lecture-screen>img{object-fit:cover}
#giang-duong .lecture-current{min-width:0;padding:4px 6px}
#giang-duong .lecture-current-meta{display:flex;gap:8px 14px;flex-wrap:wrap;font-size:12px;color:var(--lecture-muted);line-height:1.6}
#giang-duong #lecture-playing-label{font-size:10px;letter-spacing:1.1px;color:#776039}
#giang-duong #lecture-now-title{font:500 clamp(21px,2.1vw,27px)/1.45 var(--serif);margin:10px 0;overflow-wrap:anywhere}
#giang-duong .lecture-source-links{gap:8px 18px;display:flex;flex-wrap:wrap}
#giang-duong .lecture-source-links a,#giang-duong .lecture-source-links button{display:inline-flex;align-items:center;min-height:44px;font-size:13px;line-height:1.5;text-decoration:underline;text-underline-offset:4px;border:0;padding:0;color:#315d52}
#giang-duong #lecture-stop[hidden]{display:none}
#giang-duong .lecture-find-link{display:inline-flex;align-items:center;gap:14px;min-height:44px;font-size:13px;margin-top:4px;color:#315d52}
#giang-duong .lecture-start{font-size:14px;gap:12px}
#giang-duong .lecture-start .play-circle{width:52px;height:52px;font-size:25px;box-shadow:0 0 0 6px #fff3}
#giang-duong .media-catalog{margin-top:28px;padding-top:0;border-top:0;scroll-margin-top:24px}
#giang-duong .lecture-catalog-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px}
#giang-duong .lecture-catalog-heading h3{font:26px/1.4 var(--serif);margin:0}
#giang-duong .lecture-catalog-heading>span{font-size:12px;color:var(--lecture-muted)}
#giang-duong .lecture-finder{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(0,1fr) minmax(0,.8fr);gap:14px;align-items:end;padding:18px;background:#fbfaf4;border:1px solid var(--lecture-line);border-radius:7px}
#giang-duong .lecture-finder label{display:block;font-size:12px;line-height:1.6;color:var(--lecture-muted);margin:0 0 6px}
#giang-duong .lecture-search-field>div{display:flex;align-items:center;gap:8px;padding:4px 4px 4px 12px;background:#fffefa;border:1px solid #a9baaa;border-radius:5px}
#giang-duong .lecture-search-field svg{width:18px;height:18px;flex-shrink:0;fill:none;stroke:#71836b;stroke-width:1.5}
#giang-duong .lecture-search-field input{min-width:0;width:100%;flex:1;border:0;background:none;font:15px/1.5 var(--sans);padding:8px 0;color:var(--ink)}
#giang-duong .lecture-search-field input::placeholder{color:var(--lecture-muted)}
#giang-duong .lecture-search-field button{background:#315d52;color:#fffdf5;min-height:44px;padding:8px 13px;border-radius:3px;font-size:13px;white-space:nowrap;flex-shrink:0}
#giang-duong .lecture-finder .lecture-select-label{margin:0;min-width:0}
#giang-duong .lecture-finder select{display:block;width:100%;min-width:0;min-height:54px;margin-top:6px;padding:10px 28px 10px 12px;color:var(--ink);font:14px/1.5 var(--sans);background:#fffefa;border:1px solid #c5d0bc;border-radius:5px}
#giang-duong .lecture-result-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px}
#giang-duong .content-result{margin:0;font-size:13px;color:var(--lecture-muted)}
#giang-duong #lecture-reset{font-size:13px;min-height:44px;padding:8px;color:#315d52;text-decoration:underline;text-underline-offset:4px}
#giang-duong #lecture-reset[hidden]{display:none}
#giang-duong .lecture-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
#giang-duong .lecture-card{display:grid;grid-template-columns:128px minmax(0,1fr);gap:16px;padding:16px;background:#fcfbf6;border:1px solid var(--lecture-line);border-radius:6px;align-items:start;overflow:visible;transition:border-color .18s}
#giang-duong .lecture-card:hover{border-color:#99ad91}
#giang-duong .lecture-card.is-selected{border-color:#81997a;background:#f7faef}
#giang-duong .lecture-poster{height:auto;width:100%;aspect-ratio:16/9;border-radius:4px;padding:0;overflow:hidden;align-self:start}
#giang-duong .lecture-poster img{width:100%;height:100%;object-fit:cover}
#giang-duong .lecture-poster .play-circle{width:32px;height:32px;font-size:18px;box-shadow:none;border:1px solid #eee5bd}
#giang-duong .lecture-card>div{padding:0;min-width:0}
#giang-duong .lecture-card-copy>small{font-size:11px;color:var(--lecture-muted);line-height:1.5;letter-spacing:0}
#giang-duong .lecture-card h4{font:500 18px/1.45 var(--serif);margin:6px 0 3px}
#giang-duong .lecture-card h4 button{font:inherit;text-align:left;width:100%;min-height:44px;color:var(--ink);display:block;padding:0}
#giang-duong .lecture-card a{display:inline-flex;align-items:center;min-height:44px;padding:3px 0;border:0;font-size:12px;color:#315d52;text-decoration:underline;text-underline-offset:4px}
#giang-duong .content-pages{margin-top:22px;gap:12px}
#giang-duong .content-pages button{min-width:44px;min-height:44px;font-size:14px}
#giang-duong .content-pages span{font-size:13px}
#giang-duong .content-empty{grid-column:1/-1;padding:28px 16px;text-align:center;background:#fbfaf4;border:1px solid var(--lecture-line);border-radius:6px}
#giang-duong .content-empty h4{font:24px/1.4 var(--serif);margin:0 0 8px}
#giang-duong .content-empty p{font-size:14px;line-height:1.6;margin:0 0 12px}
#giang-duong .content-empty button{font-size:14px;min-height:44px;padding:10px 16px;background:#315d52;color:#fff;border-radius:4px}
#giang-duong :is(button,a,input,select):focus-visible{outline:2px solid #82683d;outline-offset:3px}
@media(max-width:950px){#giang-duong .lecture-finder{grid-template-columns:1fr 1fr}#giang-duong .lecture-search-field{grid-column:1/-1}#giang-duong .lecture-catalog-heading>span{display:none}#giang-duong .lecture-card{grid-template-columns:100px minmax(0,1fr);gap:12px}}
@media(max-width:700px){#giang-duong .lecture-heading{align-items:start;flex-direction:column;gap:10px}#giang-duong .lecture-player{grid-template-columns:1fr;gap:14px;padding:14px}#giang-duong .lecture-current{padding:0 2px}#giang-duong .lecture-grid{grid-template-columns:1fr}#giang-duong .lecture-card{grid-template-columns:112px minmax(0,1fr)}#giang-duong .lecture-finder{gap:12px;padding:14px}#giang-duong .lecture-finder select{min-height:44px}#giang-duong .lecture-search-field input{font-size:16px}}
@media(max-width:480px){#giang-duong{padding:32px 0}#giang-duong .wrap{width:calc(100% - 32px)}#giang-duong .lecture-heading .eyebrow{font-size:10px;letter-spacing:1px}#giang-duong .lecture-heading h2{font-size:34px}#giang-duong .lecture-heading p{font-size:14px}#giang-duong .lecture-heading{margin-bottom:18px}#giang-duong #lecture-now-title{font-size:22px}#giang-duong .lecture-search-field>div{padding-left:8px;gap:5px}#giang-duong .lecture-search-field svg{display:none}#giang-duong .lecture-search-field button{padding-inline:10px}#giang-duong .lecture-finder select{font-size:13px;padding-inline:8px 20px}#giang-duong .lecture-card{grid-template-columns:90px minmax(0,1fr);gap:12px;padding:14px 12px}#giang-duong .lecture-card h4{font-size:18px}#giang-duong .lecture-catalog-heading h3{font-size:25px}#giang-duong .content-result{font-size:12px}#giang-duong #lecture-reset{font-size:12px;padding:4px}}
@media(prefers-reduced-motion:reduce){#giang-duong .lecture-card,#giang-duong .play-circle{transition:none}}