:root{color:#e6edf3;background:#0b1220;font-family:Inter,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{background:radial-gradient(circle at top,#1f2d4a 0%,#0b1220 45%);min-height:100vh;margin:0}#root{min-height:100vh}.classroom-page{gap:1rem;padding:1.25rem;display:grid;position:relative}.card{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0a111ec2;border:1px solid #adc3e033;border-radius:12px;padding:1rem}.classroom-header h1{margin:0;font-size:1.45rem}.classroom-header p,.host-meta{color:#bdd0e5;margin:.45rem 0 0}.host-meta a{color:#8cc4ff}.security-banner{color:#ffdca8;align-items:center;gap:.75rem;display:flex}.warning-box{color:#ffdca8;border-color:#ffc06a99}.warning-box p{margin:0}.classroom-grid{grid-template-columns:minmax(0,2fr) minmax(300px,1fr);gap:1rem;display:grid}.live-panel,.discussion-panel{min-height:460px}.panel-header{justify-content:space-between;align-items:center;gap:.75rem;margin-bottom:.8rem;display:flex}.panel-header h2{margin:0;font-size:1.05rem}.status-pill{text-transform:capitalize;border-radius:999px;padding:.25rem .6rem;font-size:.78rem}.status-connected{color:#97f2b8;background:#173528}.join-session-state{text-align:center;color:#bdd0e5;place-content:center;gap:.7rem;min-height:390px;display:grid}.join-session-state button{color:#fff;cursor:pointer;background:linear-gradient(90deg,#4f9bff,#7e73ff);border:none;border-radius:8px;justify-self:center;padding:.55rem .9rem;font-weight:600}.member-live-column{gap:.8rem;display:grid}.waiting-instructor-state{color:#ffdca8;text-align:center;border-color:#ffc06a80}.waiting-instructor-state p{margin:0}.jitsi-stage{background:#040914;border:1px solid #5c709180;border-radius:10px;width:100%;height:390px;overflow:hidden}.hide-video-view .jitsi-stage{position:relative}.hide-video-view .jitsi-stage:after{content:"Instructor video hidden by member";color:#dce8ff;z-index:3;background:#000000eb;place-items:center;font-weight:600;display:grid;position:absolute;inset:0}.member-controls{flex-wrap:wrap;gap:.65rem;display:flex}.member-controls button{color:#ecf4ff;cursor:pointer;background:#12223d;border:1px solid #7c9dcb73;border-radius:8px;padding:.42rem .68rem}.control-note{color:#9eb6d8;margin:.7rem 0 0;font-size:.88rem}.discussion-panel{flex-direction:column;display:flex}.message-list{flex:1;gap:.75rem;padding-right:.25rem;display:grid;overflow:auto}.message-item{background:#0d1626cc;border:1px solid #7e96b752;border-radius:10px;padding:.65rem}.message-meta{color:#9ab2d4;justify-content:space-between;margin-bottom:.3rem;font-size:.85rem;display:flex}.message-item p{color:#dde8f6;margin:0;line-height:1.35}.message-composer{gap:.5rem;margin-top:.85rem;display:grid}.message-composer textarea{resize:vertical;color:#ecf4ff;background:#050d1b;border:1px solid #7791b88c;border-radius:8px;min-height:75px;padding:.65rem}.message-composer button{color:#fff;cursor:pointer;background:linear-gradient(90deg,#4f9bff,#7e73ff);border:none;border-radius:8px;padding:.55rem .8rem;font-weight:600}.message-composer button:disabled{opacity:.55;cursor:not-allowed}.watermark-layer{pointer-events:none;z-index:3;opacity:.11;transform-origin:50%;grid-template-columns:repeat(4,1fr);gap:1.4rem;padding:2rem;display:grid;position:fixed;inset:0;transform:rotate(-18deg)scale(1.15)}.watermark-layer span{color:#f5f8ff;text-wrap:nowrap;font-size:.86rem}@media (width<=1024px){.classroom-grid{grid-template-columns:1fr}.live-panel,.discussion-panel{min-height:unset}}