/* BandNine LMS — learning player page */
:root{
  --red:#E0301E; --red-d:#C4260F; --red-l:#FF8A75; --red-50:#FEF1EF; --red-100:#FDE1DC; --orange:#F7931E;
  --navy:#0B1020; --navy-2:#121829; --navy-3:#1B2236; --navy-line:#262E45;
  --ink:#101422; --ink-2:#30364A; --muted:#687083; --muted-2:#9AA1B2;
  --line:#E6E8EE; --line-2:#F0F1F5; --bg:#F7F8FA; --card:#fff;
  --green:#12A150; --green-50:#E8F7EE; --blue:#3B5BDB; --blue-50:#EDF1FF; --amber:#B4530A; --amber-50:#FFF4E6;
  --sb-w:380px; --top-h:60px;
  --shadow-sm:0 1px 2px rgba(16,20,34,.05);
  --shadow:0 1px 2px rgba(16,20,34,.04),0 4px 14px rgba(16,20,34,.05);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body.bnl{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
a{color:inherit;text-decoration:none}
svg{display:block;flex:none}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#D5D8E0;border-radius:10px;border:3px solid transparent;background-clip:content-box}

/* ============ Top bar ============ */
.topbar{position:sticky;top:0;z-index:40;height:var(--top-h);background:var(--navy);color:#fff;display:flex;align-items:center;gap:16px;padding:0 20px 0 16px;border-bottom:1px solid var(--navy-line)}
.tb-icon{width:36px;height:36px;border-radius:8px;display:grid;place-items:center;color:#C9CEDB;transition:.15s}
.tb-icon:hover{background:var(--navy-3);color:#fff}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:16.5px;letter-spacing:-.01em}
.logo-mark{width:28px;height:28px;border-radius:7px;background:#fff;color:var(--navy);display:grid;place-items:center;font-weight:800;font-size:15px;position:relative}
.logo-mark::after{content:"";position:absolute;right:5px;bottom:5px;width:5px;height:5px;border-radius:50%;background:var(--red)}
.logo b{color:var(--red-l)}
.tb-sep{width:1px;height:24px;background:var(--navy-line)}
.tb-title{min-width:0;display:flex;flex-direction:column}
.tb-title small{font-size:11.5px;color:var(--muted-2);display:flex;align-items:center;gap:6px}
.tb-title small i{width:6px;height:6px;border-radius:50%;background:var(--red-l);box-shadow:0 0 0 3px color-mix(in srgb,var(--red-l) 18%,transparent)}
.tb-title strong{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tb-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.tb-prog{display:flex;align-items:center;gap:10px;padding:6px 12px 6px 8px;border-radius:10px;transition:.15s}
.tb-prog:hover{background:var(--navy-3)}
.ring{position:relative;width:34px;height:34px}
.ring span{position:absolute;inset:0;display:grid;place-items:center;font-size:9.5px;font-weight:700}
.tb-prog small{display:block;font-size:11px;color:var(--muted-2);line-height:1.2}
.tb-prog b{font-size:12.5px;font-weight:600}
.tb-btn{height:36px;padding:0 14px;border-radius:8px;border:1px solid var(--navy-line);display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:#E3E6EE;transition:.15s}
.tb-btn:hover{background:var(--navy-3);color:#fff}
.me{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--red-l),var(--red));display:grid;place-items:center;font-size:12px;font-weight:700;color:#fff;border:2px solid var(--navy-3)}

/* ============ Shell ============ */
.shell{display:grid;grid-template-columns:var(--sb-w) minmax(0,1fr);min-height:calc(100vh - var(--top-h))}
body.sb-hidden .shell{grid-template-columns:0 minmax(0,1fr)}
body.sb-hidden .sidebar{transform:translateX(-100%);visibility:hidden}

/* ============ Sidebar (left) ============ */
.sidebar{position:sticky;top:var(--top-h);height:calc(100vh - var(--top-h));background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;transition:transform .25s ease;z-index:30;overflow:hidden}
.sb-top{padding:18px 18px 14px;border-bottom:1px solid var(--line)}
.sb-row{display:flex;align-items:center;justify-content:space-between;gap:8px}
.sb-row h2{font-size:15px;font-weight:700;letter-spacing:-.01em}
.sb-close{width:30px;height:30px;border-radius:7px;display:grid;place-items:center;color:var(--muted)}
.sb-close:hover{background:var(--line-2);color:var(--ink)}
.prog-card{margin-top:14px;border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:linear-gradient(180deg,#fff, #FCFCFD)}
.prog-card .pc-top{display:flex;justify-content:space-between;align-items:baseline}
.prog-card .pc-top b{font-size:20px;letter-spacing:-.02em}
.prog-card .pc-top span{font-size:12px;color:var(--muted)}
.bar{height:6px;border-radius:6px;background:var(--line-2);margin:8px 0 8px;overflow:hidden}
.bar i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,var(--red),var(--orange));transition:width .4s}
.prog-card .pc-meta{display:flex;gap:14px;font-size:12px;color:var(--muted)}
.prog-card .pc-meta span{display:flex;gap:5px;align-items:center}
.search{position:relative;margin-top:12px}
.search input{width:100%;height:36px;border:1px solid var(--line);border-radius:9px;padding:0 12px 0 34px;font:inherit;font-size:13px;outline:none;background:var(--bg);color:var(--ink);transition:.15s}
.search input:focus{border-color:#C9CDD8;background:#fff;box-shadow:0 0 0 3px rgba(16,20,34,.05)}
.search svg{position:absolute;left:11px;top:10.5px;color:var(--muted-2)}
.filters{display:flex;gap:6px;margin-top:10px}
.filters button{height:28px;padding:0 10px;border-radius:999px;border:1px solid var(--line);font-size:12px;font-weight:600;color:var(--muted)}
.filters button.on{background:var(--ink);border-color:var(--ink);color:#fff}
.sb-list{flex:1;overflow-y:auto;overscroll-behavior:contain}

.mod{border-bottom:1px solid var(--line)}
.mod-h{width:100%;display:flex;align-items:center;gap:12px;padding:14px 18px;text-align:left;background:#fff;position:sticky;top:0;z-index:2}
.mod-h:hover{background:#FBFBFC}
.mod-num{width:34px;height:34px;border-radius:9px;background:var(--line-2);display:grid;place-items:center;font-weight:700;font-size:13px;color:var(--ink-2);flex:none;position:relative}
.mod.current .mod-num{background:var(--red);color:#fff}
.mod.complete .mod-num{background:var(--green-50);color:var(--green)}
.mod.locked .mod-num{color:var(--muted-2)}
.mod-h .mt{flex:1;min-width:0}
.mod-h small{display:block;font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted-2)}
.mod.current .mod-h small{color:var(--red)}
.mod-h strong{display:block;font-size:13.5px;font-weight:600;line-height:1.35;margin-top:1px}
.mod-h .mm{font-size:12px;color:var(--muted);margin-top:2px;display:flex;gap:6px;align-items:center}
.mini{width:42px;height:4px;border-radius:4px;background:var(--line-2);overflow:hidden;display:inline-block}
.mini i{display:block;height:100%;background:var(--green)}
.mod.current .mini i{background:var(--red)}
.chev{color:var(--muted-2);transition:transform .2s}
.mod.open .chev{transform:rotate(180deg)}
.mod-body{display:none;padding:0 0 8px}
.mod.open .mod-body{display:block}

.ls{width:100%;display:flex;gap:12px;align-items:flex-start;padding:10px 18px 10px 26px;text-align:left;position:relative;transition:background .12s}
.ls:hover{background:var(--bg)}
.ls::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:transparent}
.ls.active{background:var(--red-50)}
.ls.active::before{background:var(--red)}
.ls .st{width:20px;height:20px;border-radius:50%;border:1.5px solid #CDD1DB;display:grid;place-items:center;margin-top:1px;flex:none;background:#fff}
.ls.done .st{background:var(--green);border-color:var(--green)}
.ls.active .st{background:var(--red);border-color:var(--red)}
.ls.locked{cursor:not-allowed}
.ls.locked .st{border:0;background:var(--line-2);color:var(--muted-2)}
.ls.locked .lt b{color:var(--muted)}
.ls .lt{flex:1;min-width:0}
.ls .lt b{display:block;font-size:13px;font-weight:500;line-height:1.4;color:var(--ink-2)}
.ls.active .lt b{font-weight:600;color:var(--ink)}
.ls .lt small{display:flex;gap:10px;align-items:center;margin-top:3px;font-size:11.5px;color:var(--muted)}
.ls .lt small span{display:flex;gap:4px;align-items:center}
.tag{font-size:10.5px;font-weight:600;padding:1px 7px;border-radius:5px;background:var(--line-2);color:var(--ink-2)}
.tag.mock{background:var(--amber-50);color:var(--amber)}
.tag.essay{background:var(--blue-50);color:var(--blue)}
.tag.free{background:var(--green-50);color:var(--green)}
.ls .resume{font-size:11px;color:var(--red);font-weight:600}
.ls .lp{height:3px;border-radius:3px;background:var(--line);margin-top:7px;overflow:hidden;max-width:160px}
.ls .lp i{display:block;height:100%;background:var(--red)}
.eq{display:flex;gap:1.5px;align-items:flex-end;height:9px}
.eq i{width:2px;background:#fff;border-radius:1px;height:3px}
body.is-playing .eq i{animation:eq .9s infinite ease-in-out}
.eq i:nth-child(2){animation-delay:.15s}.eq i:nth-child(3){animation-delay:.3s}
@keyframes eq{0%,100%{height:3px}50%{height:9px}}
.sb-foot{border-top:1px solid var(--line);padding:12px 18px;display:flex;gap:10px;align-items:center;font-size:12px;color:var(--muted)}
.sb-foot .ic{width:32px;height:32px;border-radius:8px;background:var(--green-50);color:var(--green);display:grid;place-items:center}
.sb-foot b{color:var(--ink);font-size:12.5px;display:block}

/* ============ Main ============ */
.main{min-width:0;display:flex;flex-direction:column}
.stage{background:var(--navy);display:flex;justify-content:center;position:relative}
.player{position:relative;width:100%;max-width:calc((100vh - var(--top-h) - 90px) * 16 / 9);aspect-ratio:16/9;overflow:hidden;background:#05070D;user-select:none;outline:none}
body.sb-hidden .player{max-width:calc((100vh - var(--top-h) - 60px) * 16 / 9)}

.center-play{position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);width:76px;height:76px;border-radius:50%;background:color-mix(in srgb,var(--red) 95%,transparent);display:grid;place-items:center;z-index:5;box-shadow:0 10px 40px rgba(224,48,30,.45);transition:transform .2s,opacity .2s}
.center-play:hover{transform:translate(-50%,-50%) scale(1.06)}
.player.playing .center-play{opacity:0;pointer-events:none;transform:translate(-50%,-50%) scale(.9)}
.player::after{content:"";position:absolute;inset:0;background:rgba(5,7,13,.28);transition:opacity .25s;pointer-events:none;z-index:2}
.player.playing::after{opacity:0}
.resume-pill{position:absolute;left:50%;top:calc(46% + 58px);transform:translateX(-50%);z-index:5;font-size:12.5px;color:#fff;background:rgba(0,0,0,.55);padding:5px 12px;border-radius:99px;backdrop-filter:blur(6px);white-space:nowrap}
.player.playing .resume-pill{display:none}

.controls{position:absolute;left:0;right:0;bottom:0;z-index:6;padding:36px 16px 10px;background:linear-gradient(transparent,rgba(3,5,10,.92));color:#fff;transition:opacity .25s}
.player.playing.idle .controls{opacity:0}
.seek{position:relative;height:18px;display:flex;align-items:center;cursor:pointer}
.chapters{position:relative;display:flex;gap:3px;width:100%;height:4px;transition:height .12s}
.seek:hover .chapters{height:6px}
.chap{position:relative;height:100%;background:rgba(255,255,255,.25);border-radius:2px;overflow:hidden}
.chap .buf{position:absolute;inset:0 auto 0 0;background:rgba(255,255,255,.22)}
.chap .fill{position:absolute;inset:0 auto 0 0;background:var(--red)}
.knob{position:absolute;top:50%;width:13px;height:13px;margin-left:-6.5px;border-radius:50%;background:#fff;transform:translateY(-50%) scale(0);transition:transform .12s;z-index:3;box-shadow:0 0 0 3px rgba(224,48,30,.55)}
.seek:hover .knob,.player:not(.playing) .knob{transform:translateY(-50%) scale(1)}
.cmark{position:absolute;top:-9px;width:12px;height:12px;margin-left:-6px;z-index:4;cursor:pointer;display:grid;place-items:center}
.cmark::before{content:"";width:6px;height:6px;border-radius:50%;background:#FFB547;box-shadow:0 0 0 2px rgba(0,0,0,.4)}
.hover-tip{position:absolute;bottom:26px;transform:translateX(-50%);background:#fff;color:var(--ink);font-size:12px;padding:6px 10px;border-radius:8px;white-space:nowrap;pointer-events:none;box-shadow:0 8px 24px rgba(0,0,0,.3);display:none;text-align:center;line-height:1.3;max-width:260px;overflow:hidden;text-overflow:ellipsis}
.hover-tip b{display:block;font-size:11px;color:var(--muted);font-weight:600}
.seek:hover .hover-tip{display:block}
.ctrl{display:flex;align-items:center;gap:2px;margin-top:6px}
.cb{width:38px;height:38px;border-radius:8px;display:grid;place-items:center;color:#fff;opacity:.92;position:relative}
.cb:hover{background:rgba(255,255,255,.1);opacity:1}
.cb[data-tip]:hover::after{content:attr(data-tip);position:absolute;bottom:44px;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.85);font-size:11.5px;padding:4px 8px;border-radius:6px;white-space:nowrap;font-weight:500}
.vol{display:flex;align-items:center}
.vol input{width:0;opacity:0;transition:.2s;accent-color:#fff}
.vol:hover input{width:70px;opacity:1;margin-right:6px}
.time{font-size:13px;font-variant-numeric:tabular-nums;margin-left:8px;white-space:nowrap}
.time em{font-style:normal;color:rgba(255,255,255,.6)}
.chap-name{font-size:13px;color:rgba(255,255,255,.75);margin-left:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;gap:6px;align-items:center}
.chap-name::before{content:"";width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.6)}
.ctrl .sp{flex:1}
.pill-btn{height:26px;padding:0 8px;border-radius:5px;font-size:12px;font-weight:700;width:auto;min-width:38px}
.c-at{display:flex;align-items:center;gap:6px;height:32px;padding:0 12px;border-radius:99px;background:rgba(255,255,255,.12);font-size:12.5px;font-weight:600;margin-right:6px;white-space:nowrap}
.c-at:hover{background:rgba(255,255,255,.2)}

/* lesson nav bar under player */
.lesson-bar{background:#fff;border-bottom:1px solid var(--line)}
.lesson-bar-in{max-width:1080px;margin:0 auto;padding:18px 32px;display:flex;align-items:center;gap:20px}
.lb-info{flex:1;min-width:0}
.crumb{font-size:12.5px;color:var(--muted);display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.crumb b{color:var(--ink-2);font-weight:600}
.lb-info h1{font-size:22px;font-weight:700;letter-spacing:-.022em;line-height:1.25;margin-top:4px}
.lb-actions{display:flex;gap:8px;align-items:center;flex:none}
.btn{height:38px;padding:0 15px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:13px;font-weight:600;transition:.15s;white-space:nowrap}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 1px 2px color-mix(in srgb,var(--red) 30%,transparent)}
.btn-primary:hover{background:var(--red-d)}
.btn-dark{background:var(--ink);color:#fff}
.btn-outline{border:1px solid var(--line);background:#fff;color:var(--ink-2)}
.btn-outline:hover{border-color:#CDD1DB;background:#FBFBFC}
.btn-square{width:38px;padding:0}
.btn-done.done{background:var(--green-50);border-color:#C3EBD2;color:var(--green)}

/* body */
.content{max-width:1080px;width:100%;margin:0 auto;padding:0 32px 64px}
.tabs{display:flex;gap:28px;border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{padding:16px 0 14px;font-weight:600;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap;display:flex;gap:8px;align-items:center;font-size:13.5px}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--ink);border-color:var(--ink)}
.tab .count{font-size:11px;padding:1px 7px;border-radius:99px;background:var(--line-2);color:var(--ink-2)}
.tab.active .count{background:var(--ink);color:#fff}
.panel{display:none;padding-top:24px}.panel.active{display:block}

.grid2{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm)}

/* comments */
.composer{padding:16px;display:flex;gap:12px}
.av{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:700;flex:none}
.av-me{background:linear-gradient(135deg,var(--red-l),var(--red));color:#fff}
.av-tr{background:var(--navy);color:#fff;position:relative}
.av-tr::after{content:"";position:absolute;right:-1px;bottom:-1px;width:11px;height:11px;border-radius:50%;background:var(--red) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='4'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/7px no-repeat;border:2px solid #fff}
.cp-body{flex:1;min-width:0}
.cp-field{border:1px solid var(--line);border-radius:11px;background:#fff;transition:.15s}
.cp-field:focus-within{border-color:#B9BECB;box-shadow:0 0 0 3px rgba(16,20,34,.05)}
.cp-field textarea{display:block;width:100%;min-height:64px;resize:none;border:0;outline:none;padding:12px 14px 6px;font:inherit;color:var(--ink);background:transparent;border-radius:11px}
.cp-tools{display:flex;align-items:center;gap:8px;padding:6px 8px 8px 10px;flex-wrap:wrap}
.ts-chip{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 10px 0 8px;border-radius:7px;font-size:12px;font-weight:600;color:var(--muted);border:1px dashed #CDD1DB;cursor:pointer}
.ts-chip input{display:none}
.ts-chip.on{border-style:solid;border-color:#FFD3A8;background:var(--amber-50);color:var(--amber)}
.ts-chip .tsv{font-variant-numeric:tabular-nums}
.type-seg{display:inline-flex;border:1px solid var(--line);border-radius:7px;overflow:hidden;height:28px}
.type-seg button{padding:0 10px;font-size:12px;font-weight:600;color:var(--muted);display:flex;gap:5px;align-items:center}
.type-seg button+button{border-left:1px solid var(--line)}
.type-seg button.on{background:var(--ink);color:#fff}
.cp-tools .sp{flex:1}
.cp-tools .count-c{font-size:11.5px;color:var(--muted-2);font-variant-numeric:tabular-nums}
.cp-help{font-size:12px;color:var(--muted);margin-top:8px;display:flex;gap:6px;align-items:center}
kbd{font-family:inherit;font-size:11px;border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;padding:0 5px;background:#fff;color:var(--ink-2)}

.list-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:26px 0 4px;flex-wrap:wrap}
.list-head h3{font-size:15px;font-weight:700}
.list-head h3 span{color:var(--muted);font-weight:500}
.seg{display:inline-flex;background:var(--line-2);border-radius:9px;padding:3px}
.seg button{height:28px;padding:0 11px;border-radius:7px;font-size:12px;font-weight:600;color:var(--muted)}
.seg button.on{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(16,20,34,.1)}

.cm{display:flex;gap:12px;padding:18px 0;border-bottom:1px solid var(--line)}
.cm:last-child{border-bottom:0}
.cm-b{flex:1;min-width:0}
.cm-h{display:flex;align-items:center;gap:8px;flex-wrap:wrap;line-height:1.3}
.cm-h b{font-size:13.5px;font-weight:600}
.cm-h .when{color:var(--muted-2);font-size:12px}
.badge{font-size:10.5px;font-weight:700;padding:2px 7px;border-radius:5px;letter-spacing:.01em}
.b-tr{background:var(--red-50);color:var(--red)}
.b-q{background:var(--blue-50);color:var(--blue)}
.b-ans{background:var(--green-50);color:var(--green);display:inline-flex;gap:3px;align-items:center}
.b-you{background:var(--line-2);color:var(--ink-2)}
.tsb{display:inline-flex;gap:5px;align-items:center;font-size:12px;font-weight:700;color:var(--amber);background:var(--amber-50);padding:2px 8px;border-radius:5px;font-variant-numeric:tabular-nums}
.tsb:hover{background:#FFE8CC}
.cm-t{margin-top:6px;color:var(--ink-2);white-space:pre-wrap;word-wrap:break-word;font-size:14px}
.cm-a{display:flex;gap:4px;margin-top:8px;margin-left:-8px}
.cm-a button{height:28px;padding:0 8px;border-radius:6px;display:flex;gap:6px;align-items:center;font-size:12px;font-weight:600;color:var(--muted)}
.cm-a button:hover{background:var(--line-2);color:var(--ink)}
.cm-a button.liked{color:var(--red)}
.replies{margin-top:12px;padding-left:16px;border-left:2px solid var(--line-2)}
.replies .cm{padding:10px 0;border:0}
.replies .av{width:30px;height:30px;font-size:11px}
.reply-form{display:flex;gap:8px;margin-top:10px}
.reply-form input{flex:1;min-width:0;height:36px;border:1px solid var(--line);border-radius:9px;padding:0 12px;font:inherit;outline:none}
.reply-form input:focus{border-color:#B9BECB}
.empty{padding:40px 20px;text-align:center;color:var(--muted)}
.empty b{display:block;color:var(--ink);font-size:14px;margin-bottom:4px}

/* side info */
.side-card{padding:16px}
.side-card h4{font-size:13px;font-weight:700;margin-bottom:12px}
.tr{display:flex;gap:12px;align-items:center}
.tr .av{width:44px;height:44px;border-radius:12px;font-size:14px}
.tr small{display:block;color:var(--muted);font-size:12px}
.tr-stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:14px;border-top:1px solid var(--line);padding-top:12px;text-align:center}
.tr-stats b{display:block;font-size:14px}
.tr-stats span{font-size:11px;color:var(--muted)}
.side-card + .side-card{margin-top:14px}
.guide li{display:flex;gap:8px;font-size:12.5px;color:var(--ink-2);margin-bottom:8px;list-style:none}
.guide li:last-child{margin-bottom:0}
.guide li i{width:18px;height:18px;border-radius:50%;background:var(--green-50);color:var(--green);display:grid;place-items:center;flex:none;font-style:normal;font-size:10px;font-weight:800;margin-top:1px}

/* overview */
.ov p{color:var(--ink-2);font-size:14.5px;line-height:1.65}
.ov h4{font-size:14px;margin:24px 0 10px}
.chap-list{overflow:hidden}
.chap-row{width:100%;display:flex;align-items:center;gap:14px;padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.chap-row:last-child{border-bottom:0}
.chap-row:hover{background:var(--bg)}
.chap-row .tsb{min-width:58px;justify-content:center}
.chap-row span{flex:1;font-weight:500}
.chap-row.now span{color:var(--red);font-weight:600}
.objs{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.obj{display:flex;gap:10px;padding:12px 14px;font-size:13.5px;color:var(--ink-2)}
.obj i{width:20px;height:20px;border-radius:50%;background:var(--green-50);color:var(--green);display:grid;place-items:center;flex:none;font-style:normal;font-size:11px;font-weight:800}

/* resources */
.res{display:flex;align-items:center;gap:14px;padding:14px 16px;border-bottom:1px solid var(--line)}
.res:last-child{border-bottom:0}
.res .ic{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font-size:10.5px;font-weight:800;flex:none}
.res .ic.pdf{background:var(--red-50);color:var(--red)}
.res .ic.mp3{background:var(--blue-50);color:var(--blue)}
.res div{flex:1;min-width:0}
.res small{color:var(--muted);font-size:12px}

/* next/prev footer */
.np{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:32px}
.np button{display:flex;align-items:center;gap:12px;padding:14px 16px;text-align:left;border-radius:12px}
.np button:hover{border-color:#CDD1DB}
.np small{display:block;font-size:11.5px;color:var(--muted)}
.np b{font-size:13.5px;font-weight:600}
.np .r{justify-content:flex-end;text-align:right}

.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,16px);background:var(--ink);color:#fff;padding:10px 16px;border-radius:10px;font-size:13px;font-weight:500;opacity:0;transition:.25s;z-index:99;display:flex;gap:8px;align-items:center;box-shadow:0 10px 30px rgba(0,0,0,.25);pointer-events:none}
.toast.show{opacity:1;transform:translate(-50%,0)}
.scrim{display:none}
.only-m{display:none!important}

@media (max-width:1240px){ .grid2{grid-template-columns:1fr} .side{display:none} }
@media (max-width:1024px){
  :root{--sb-w:340px}
}
@media (max-width:900px){
  .shell{grid-template-columns:1fr!important}
  .sidebar{position:fixed;left:0;top:0;bottom:0;height:100%;width:min(88vw,380px);transform:translateX(-100%);visibility:hidden;box-shadow:20px 0 60px rgba(0,0,0,.2);z-index:60}
  body.sb-open .sidebar{transform:none;visibility:visible}
  body.sb-hidden .sidebar{transform:translateX(-100%)}
  .scrim{display:block;position:fixed;inset:0;background:rgba(5,7,13,.5);z-index:55;opacity:0;pointer-events:none;transition:.2s}
  body.sb-open .scrim{opacity:1;pointer-events:auto}
  .only-m{display:inline-flex!important}
  .hide-m{display:none!important}
  .topbar{padding:0 12px;gap:10px}
  .player{max-width:none}
  .lesson-bar-in{padding:16px;flex-direction:column;align-items:stretch;gap:14px}
  .lb-info h1{font-size:19px}
  .lb-actions .btn{flex:1}
  .lb-actions .btn-square{flex:none}
  .content{padding:0 16px 48px}
  .objs,.np{grid-template-columns:1fr}
  .center-play{top:40%}
  .center-play{width:58px;height:58px}
  .resume-pill{display:none}
  .controls{padding:24px 6px 4px}
  .cb{width:34px;height:34px}
  .chap-name,.vol input{display:none}
}
@media (max-width:480px){ .hide-xs{display:none!important} .tb-title small{display:none} }

/* ===== plugin additions ===== */
body.bnl a{text-decoration:none}
body.bnl h1,body.bnl h2,body.bnl h3,body.bnl h4,body.bnl p{margin:0}
body.bnl ul{margin:0;padding:0}
.bnl .me{color:#fff}
.tb-btn-red{background:var(--red);border-color:var(--red);color:#fff}
.tb-btn-red:hover{background:var(--red-d)}
.btn-sm{height:32px;padding:0 14px}
.yt-wrap{position:absolute;inset:0;pointer-events:none;background:#000;overflow:hidden}
/* The iframe is taller than the player: YouTube's title/share bar (top) and logo/"more videos" (bottom) fall outside the visible area, the video itself stays fully visible. */
.yt-wrap iframe{position:absolute;left:0;top:-90px;width:100%;height:calc(100% + 180px);border:0}
.shield{position:absolute;inset:0;z-index:3}
.poster{position:absolute;inset:0;z-index:4;display:flex;align-items:flex-end;padding:6% 6% 16%;background:radial-gradient(90% 120% at 100% 0%,#3a1410 0%,#10131f 55%,#0a0d17 100%);transition:opacity .3s}
.poster::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:44px 44px}
.poster-in{position:relative;color:#fff;max-width:70%}
.poster-in small{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--red-l)}
.poster-in h3{font-size:clamp(18px,2.6vw,34px);line-height:1.15;letter-spacing:-.02em;margin-top:8px}
.player.started .poster{opacity:0;pointer-events:none}
.player.started:not(.playing)::after{opacity:1}
.player::after{z-index:4}
.center-play{z-index:6}
.resume-pill{z-index:6}
.player.started.playing .center-play{opacity:0}
.watermark{position:absolute;z-index:5;pointer-events:none;color:rgba(255,255,255,.22);font-size:13px;font-weight:600;white-space:nowrap;transition:left 1.2s ease,top 1.2s ease;text-shadow:0 1px 2px rgba(0,0,0,.4)}
.lock{position:absolute;inset:0;z-index:7;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:8px;color:#fff;background:rgba(5,7,13,.82);padding:20px}
.lock[hidden]{display:none}
.lock-ic{width:52px;height:52px;border-radius:50%;background:rgba(255,255,255,.1);display:grid;place-items:center;margin-bottom:6px}
.lock b{font-size:18px}
.lock p{color:#BCC1CF;max-width:420px;margin-bottom:8px}
.spinner{position:absolute;left:50%;top:46%;width:46px;height:46px;margin:-23px 0 0 -23px;border-radius:50%;border:3px solid rgba(255,255,255,.2);border-top-color:#fff;animation:spin .8s linear infinite;z-index:6;pointer-events:none}
.spinner[hidden]{display:none}
@keyframes spin{to{transform:rotate(360deg)}}
.player.no-video .controls{display:none}
.preview-card b{display:block;font-size:14px}
.preview-card p{font-size:12.5px;color:var(--muted);margin:4px 0 12px}
.preview-card .btn{width:100%}
.composer-locked{display:flex;align-items:center;gap:12px;padding:16px;color:var(--ink-2)}
.composer-locked span{flex:1}
.ov-text{color:var(--ink-2);font-size:14.5px;line-height:1.7;white-space:pre-wrap;margin-bottom:8px}
.cm-a .del{margin-left:auto}
.badge.b-pend{background:var(--amber-50);color:var(--amber)}
.res a.btn{flex:none}
.ls .prev-tag{background:var(--green-50);color:var(--green)}
@media (max-width:900px){.poster{align-items:flex-start;padding:5% 5%}.poster-in{max-width:100%}.poster-in h3{font-size:17px}.poster-in small{font-size:10.5px}}

html{margin-top:0!important}
#wpadminbar{display:none!important}