/* EDU:CLASSROOM_PLAYER_V3 - fully scoped */
@keyframes ym3FadeIn  { from{opacity:0} to{opacity:1} }
@keyframes ym3FadeOut { from{opacity:1} to{opacity:0} }
@keyframes ym3SlideIn { from{opacity:0;transform:translateX(22px)} to{opacity:1;transform:translateX(0)} }
@keyframes ym3Pulse   { 0%,100%{opacity:1} 50%{opacity:0.4} }
@keyframes ym3SubFade { from{opacity:0.3} to{opacity:1} }
#ym3-overlay{position:fixed;inset:0;z-index:99999;background:rgba(8,8,28,.96);display:flex;align-items:center;justify-content:center;padding:12px;box-sizing:border-box;animation:ym3FadeIn .25s ease}
#ym3-overlay.ym3-fade-out{animation:ym3FadeOut .3s ease forwards}
#ym3-overlay #ym3-container{display:flex;flex-direction:column;width:100%;max-width:960px;max-height:96vh;border-radius:18px;overflow:hidden;box-shadow:0 12px 60px rgba(0,0,0,.7)}
#ym3-overlay #ym3-progress-bar{height:4px;background:rgba(255,255,255,.12);flex-shrink:0}
#ym3-overlay #ym3-progress-fill{height:100%;background:linear-gradient(90deg,#6c63ff,#a78bfa);transition:width .5s ease}
#ym3-overlay #ym3-slide-card{background:#fff;flex:1;display:flex;flex-direction:column;position:relative;overflow:hidden;animation:ym3SlideIn .35s cubic-bezier(.22,1,.36,1)}
#ym3-overlay #ym3-slide-num{position:absolute;top:14px;right:18px;font-size:2.4rem;font-weight:900;color:rgba(100,90,200,.12);line-height:1;pointer-events:none;z-index:1}
#ym3-overlay #ym3-slide-body{display:flex;flex:1;min-height:0}
#ym3-overlay #ym3-text-col{flex:1 1 54%;padding:2rem 1.8rem 1rem 2rem;display:flex;flex-direction:column;overflow-y:auto}
#ym3-overlay #ym3-title{font-size:1.45rem;font-weight:700;color:#1a1a2e;line-height:1.35;margin:0 0 .5rem}
#ym3-overlay .ym3-title-divider{height:3px;width:56px;background:linear-gradient(90deg,#6c63ff,#a78bfa);border-radius:3px;margin-bottom:1.2rem;flex-shrink:0}
#ym3-overlay #ym3-bullets{display:flex;flex-direction:column;gap:.65rem}
#ym3-overlay .ym3-bullet{display:flex;align-items:flex-start;gap:.5rem;font-size:.97rem;line-height:1.55;color:#2d2d44;padding:.45rem .7rem;border-radius:8px;transition:background .2s,color .2s}
#ym3-overlay .ym3-bullet-dot{color:#6c63ff;font-size:1.1rem;margin-top:.05rem;flex-shrink:0}
#ym3-overlay .ym3-bullet-text{flex:1}
#ym3-overlay .ym3-bullet-active{background:linear-gradient(135deg,rgba(108,99,255,.1),rgba(167,139,250,.08));color:#1a1a2e}
#ym3-overlay .ym3-bullet-active .ym3-bullet-dot{color:#4f46e5}
#ym3-overlay #ym3-img-col{flex:0 0 42%;display:flex;align-items:center;justify-content:center;padding:1.4rem 1.8rem 1rem 0}
#ym3-overlay .ym3-img-wrap{position:relative;width:100%;border-radius:14px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.12)}
#ym3-overlay #ym3-slide-img{width:100%;display:block;border-radius:14px}
#ym3-overlay .ym3-img-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:50px;height:50px;border-radius:50%;background:rgba(255,255,255,.9);border:none;font-size:1.3rem;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 12px rgba(0,0,0,.2);transition:transform .15s,background .15s;color:#4f46e5}
#ym3-overlay .ym3-img-play-btn:hover{transform:translate(-50%,-50%) scale(1.12);background:#fff}
#ym3-overlay #ym3-subtitle-bar{background:#1a1a2e;color:#e8e4ff;padding:.75rem 1.5rem;min-height:3rem;display:flex;align-items:center;gap:.6rem;font-size:.97rem;line-height:1.5;flex-shrink:0}
#ym3-overlay .ym3-sub-icon{font-size:1rem;flex-shrink:0;opacity:.7}
#ym3-overlay #ym3-subtitle-text{flex:1;font-style:italic;letter-spacing:.01em}
#ym3-overlay #ym3-subtitle-text:not(:empty){animation:ym3SubFade .2s ease}
#ym3-overlay #ym3-ctrl-bar{background:#13132b;padding:.8rem 1.2rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-shrink:0}
#ym3-overlay .ym3-ctrl-left{display:flex;align-items:center;gap:.75rem;flex:1;min-width:0}
#ym3-overlay .ym3-ctrl-center{display:flex;align-items:center;gap:.5rem;flex-shrink:0}
#ym3-overlay .ym3-ctrl-right{display:flex;align-items:center;gap:.5rem;flex:1;justify-content:flex-end}
#ym3-overlay .ym3-avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#6c63ff,#a78bfa);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;flex-shrink:0}
#ym3-overlay .ym3-teacher-name{font-size:.85rem;font-weight:600;color:#e0d9ff;white-space:nowrap}
#ym3-overlay .ym3-counter-text{font-size:.75rem;color:rgba(255,255,255,.45);white-space:nowrap}
#ym3-overlay .ym3-status-label{font-size:.78rem;color:#a78bfa;margin-left:.4rem;animation:ym3Pulse 1.2s infinite}
#ym3-overlay .ym3-ctrl-btn{padding:.45rem .85rem;border-radius:8px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.07);color:#e0d9ff;cursor:pointer;font-size:.88rem;font-weight:600;transition:background .15s,border-color .15s,transform .1s;white-space:nowrap}
#ym3-overlay .ym3-ctrl-btn:hover:not(:disabled){background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.35)}
#ym3-overlay .ym3-ctrl-btn:active:not(:disabled){transform:scale(.95)}
#ym3-overlay .ym3-ctrl-btn:disabled{opacity:.3;cursor:not-allowed}
#ym3-overlay .ym3-ctrl-main{width:48px;height:48px;border-radius:50%;padding:0;font-size:1.1rem;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#6c63ff,#a78bfa);border:none;box-shadow:0 3px 12px rgba(108,99,255,.5);color:#fff}
#ym3-overlay .ym3-ctrl-main.ym3-playing{background:linear-gradient(135deg,#f59e0b,#f97316);box-shadow:0 3px 12px rgba(245,158,11,.5)}
#ym3-overlay .ym3-ctrl-main:hover:not(:disabled){transform:scale(1.07)}
#ym3-overlay .ym3-speed-btn{min-width:36px;text-align:center}
#ym3-overlay .ym3-loop-active{background:rgba(108,99,255,.3);border-color:#6c63ff;color:#a78bfa}
#ym3-overlay .ym3-pptx-btn{background:rgba(16,185,129,.15);border-color:rgba(16,185,129,.35);color:#6ee7b7;font-size:.82rem}
#ym3-overlay .ym3-pptx-btn:hover:not(:disabled){background:rgba(16,185,129,.25)}
#ym3-overlay .ym3-exit-btn{background:rgba(239,68,68,.12);border-color:rgba(239,68,68,.3);color:#fca5a5}
#ym3-overlay .ym3-exit-btn:hover:not(:disabled){background:rgba(239,68,68,.25)}
#ym-classroom-play{display:block;width:100%;margin-bottom:14px;padding:13px 20px;background:linear-gradient(135deg,#4f46e5,#6c63ff);color:#fff;border:none;border-radius:12px;font-size:1.05rem;font-weight:700;cursor:pointer;letter-spacing:.4px;box-shadow:0 3px 14px rgba(79,70,229,.4);transition:opacity .2s,transform .15s}
#ym-classroom-play:hover{opacity:.9;transform:translateY(-1px)}
#ym-classroom-play:active{transform:translateY(0)}
@media(max-width:600px){
  #ym3-overlay #ym3-slide-body{flex-direction:column}
  #ym3-overlay #ym3-img-col{flex:none;padding:0 1.2rem .8rem}
  #ym3-overlay #ym3-text-col{padding:1.4rem 1.2rem .5rem}
  #ym3-overlay #ym3-title{font-size:1.15rem}
  #ym3-overlay .ym3-teacher-name,#ym3-overlay .ym3-counter-text{display:none}
  #ym3-overlay #ym3-ctrl-bar{padding:.7rem .8rem;gap:.5rem}
  #ym3-overlay .ym3-ctrl-btn{padding:.4rem .6rem;font-size:.82rem}
}