.classroom{color:#183149;background:#eef3f6;min-height:100vh}.classroom>header{color:#fff;background:#102a43;grid-template-columns:1fr auto 1fr;align-items:center;height:70px;padding:0 24px;display:grid}.classroom>header a{color:#fff;text-decoration:none}.classroom>header div{text-align:center}.classroom>header div b,.classroom>header div span{display:block}.classroom>header div span{color:#b9c9d5;font-size:10px}.classroom>header strong{text-align:right;color:#f3b33d;font-size:20px}.room-grid{grid-template-columns:1fr 300px;gap:15px;height:calc(100vh - 145px);padding:15px;display:grid}.board-wrap{background:#fff;border-radius:12px;flex-direction:column;display:flex;overflow:hidden}.board-tools{border-bottom:1px solid #dbe6ec;align-items:center;gap:8px;min-height:54px;padding:8px 13px;display:flex}.board-tools svg{width:18px}.board-tools input{border:0;width:38px;height:32px}.board-tools button{background:#fff;border:1px solid #ccd9e0;border-radius:7px;align-items:center;gap:5px;padding:8px;display:flex}.board-wrap canvas{touch-action:none;cursor:crosshair;background:#fff;width:100%;height:100%}.board-wrap>p{text-align:center;color:#748797;font-size:10px}.room-grid aside{grid-template-rows:1fr 1.2fr;gap:12px;display:grid}.participants,.chat{background:#fff;border-radius:12px;min-height:0;padding:15px}.participants h3,.chat h3{align-items:center;gap:7px;margin:0 0 15px;font:17px Georgia;display:flex}.participants h3 svg{width:18px}.participants article{align-items:center;gap:9px;margin:13px 0;display:flex}.participants article>span{background:#dcedf5;border-radius:50%;place-items:center;width:38px;height:38px;font-weight:700;display:grid}.participants b,.participants small{display:block}.participants small{color:#708494;font-size:9px}.chat{flex-direction:column;display:flex}.chat>div{flex:1;overflow:auto}.chat p{background:#edf4f7;border-radius:8px;padding:9px;font-size:11px}.chat p b{color:#1565c0;display:block}.chat form{display:flex}.chat input{border:1px solid #cbd9e1;border-radius:8px 0 0 8px;flex:1;padding:10px}.chat button{color:#fff;background:#1565c0;border:0;border-radius:0 8px 8px 0}.chat button svg{width:17px}.classroom>footer{background:#102a43;justify-content:center;align-items:center;gap:10px;height:75px;display:flex}.classroom>footer button{color:#fff;background:#ffffff17;border:0;border-radius:9px;align-items:center;gap:7px;padding:10px 15px;display:flex}.classroom>footer svg{width:18px}.classroom>footer .leave{background:#d94747}@media (max-width:800px){.room-grid{grid-template-columns:1fr;height:auto}.board-wrap{height:60vh}.room-grid aside{grid-template-rows:auto;grid-template-columns:1fr 1fr}.classroom>footer{position:sticky;bottom:0}.classroom>footer span{display:none}}@media (max-width:520px){.classroom>header{grid-template-columns:1fr auto}.classroom>header>div{display:none}.room-grid aside{grid-template-columns:1fr}.board-tools{overflow:auto}.classroom>footer{gap:6px}}
.board-tools{overflow-x:auto}.board-tools button.active{color:#fff;background:#1565c0}.board-tools select{border:1px solid #ccd9e0;border-radius:7px;padding:8px}.upload{white-space:nowrap;border:1px solid #ccd9e0;border-radius:7px;align-items:center;gap:5px;padding:8px;font-size:12px;display:flex}.upload svg{width:18px}.upload input{display:none}.board-wrap canvas.grid-on{background-color:#fff;background-image:linear-gradient(#e4edf1 1px,#0000 1px),linear-gradient(90deg,#e4edf1 1px,#0000 1px);background-size:28px 28px}.page-bar{border-top:1px solid #dbe6ec;align-items:center;gap:7px;min-height:44px;padding:7px 12px;display:flex;overflow:auto}.page-bar span{color:#64788a;white-space:nowrap;font-size:11px}.page-bar button{background:#fff;border:1px solid #ccd9e0;border-radius:6px;align-items:center;gap:4px;padding:6px 9px;display:flex}.page-bar button.active{color:#fff;background:#1565c0}.page-bar svg{width:15px}