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var(--radius) var(--radius);width:100%;height:100%;display:block}.board-lock-hint{color:#fff;pointer-events:none;white-space:nowrap;background:#0f172ac7;border-radius:999px;align-items:center;gap:6px;padding:7px 12px;font-size:12.5px;display:inline-flex;position:absolute;top:12px;left:50%;transform:translate(-50%)}.board-note{color:#475569e6;pointer-events:none;background:#f8fafcd9;border-radius:6px;padding:3px 8px;font-size:11.5px;position:absolute;bottom:8px;left:12px}.dark .board-note{color:#cbd5e1;background:#1e293bd9}.board-text-editor{z-index:5;background:var(--card-bg,#fff);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;gap:8px;width:min(92%,460px);padding:10px;display:flex;position:absolute;transform:translate(-50%,calc(-100% - 10px));box-shadow:0 18px 48px #0f172a38}.dark .board-text-editor{background:#1e293b}.board-text-input-row{align-items:center;gap:6px;display:flex}.board-text-input{flex:1;min-width:0}.board-sym-palette{flex-direction:column;gap:6px;display:flex}.board-sym-group{flex-wrap:wrap;align-items:center;gap:4px;display:flex}.board-sym-label{color:var(--muted,#64748b);min-width:96px;font-size:11px;font-style:normal}.board-sym{border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:7px;justify-content:center;align-items:center;min-width:30px;height:28px;padding:0 4px;font-size:14px;line-height:1;display:inline-flex}.board-sym:hover{background:var(--bg,#f1f5f9);border-color:var(--primary,#2563eb)}.board-text-hint{color:var(--muted,#64748b);font-size:11px}.board-zones{flex-direction:column;gap:6px;padding:8px 12px 12px;display:flex}.board-zones .field-label{align-items:center;gap:6px;display:flex}.board-zones-list{flex-wrap:wrap;gap:6px;display:flex}.board-zone-chip{color:#b91c1c;cursor:pointer;background:#fee2e2;border:1px solid #fecaca;border-radius:999px;align-items:center;gap:4px;padding:3px 9px;font-size:11.5px;display:inline-flex}.board-modal-backdrop{z-index:80;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#0f172a8c;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.board-crop-modal{background:var(--card-bg,#fff);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;gap:10px;width:min(92vw,560px);padding:14px;display:flex;box-shadow:0 24px 64px #0f172a4d}.dark .board-crop-modal{background:#1e293b}.board-crop-head{align-items:center;gap:6px;display:flex}.board-crop-stage{border:1px solid var(--border);border-radius:var(--radius);background:#f1f5f9;max-height:56vh;position:relative;overflow:auto}.board-crop-box{min-width:100%;display:inline-block;position:relative}.board-crop-box img{-webkit-user-select:none;user-select:none;-webkit-user-drag:none;width:100%;height:auto;display:block}.board-crop-rect{pointer-events:none;background:#2563eb38;border:2px solid #2563eb;position:absolute;box-shadow:inset 0 0 0 1px #fffc}.board-crop-rect:after{content:"";background:linear-gradient(90deg,#ffffff8c 1px,#0000 1px) 0 0/33.33% 100%,linear-gradient(#ffffff8c 1px,#0000 1px) 0 0/100% 33.33%;position:absolute;inset:0}.board-crop-hint{color:var(--muted,#64748b);font-size:12px}.board-crop-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.wait-row{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:8px;padding:8px 0;display:flex}.wait-row:last-child{border-bottom:none}.wait-row-name{text-overflow:ellipsis;white-space:nowrap;font-size:13.5px;font-weight:600;overflow:hidden}.wait-row-actions{gap:4px;display:flex}.member-list{flex-direction:column;gap:4px;margin-top:6px;display:flex}.member-row{border-radius:8px;align-items:center;gap:9px;min-width:0;padding:6px 4px;display:flex}.member-row.me{background:var(--surface-2)}.member-avatar{background:var(--primary-soft);width:28px;height:28px;color:var(--primary);border-radius:999px;flex:none;place-items:center;font-size:13px;font-weight:700;display:inline-grid}.member-name{text-overflow:ellipsis;white-space:nowrap;align-items:center;gap:6px;min-width:0;font-size:13.5px;font-weight:600;display:flex;overflow:hidden}.member-role{color:var(--primary);background:var(--primary-soft);border-radius:999px;flex:none;padding:1px 6px;font-size:11px;font-style:normal}.member-role.me-label{color:var(--muted);background:var(--surface-2)}.member-flags{color:var(--muted);flex:none;align-items:center;gap:6px;margin-left:auto;display:flex}.mflag{display:inline-flex}.mic-on{color:var(--danger)}.mic-off{opacity:.35}.hand-up{color:var(--warning)}.hand-down{opacity:.35}.chat-box{flex-direction:column;gap:6px;height:250px;margin:8px 0;padding:4px 2px;display:flex;overflow-y:auto}.chat-msg{background:var(--surface-2);border-radius:10px;flex-direction:column;align-self:flex-start;gap:2px;max-width:86%;padding:6px 10px;display:flex}.chat-msg.mine{background:var(--primary-soft);align-self:flex-end}.chat-who{color:var(--muted);text-transform:uppercase;font-size:10.5px;font-weight:700}.chat-who[data-role=teacher]{color:var(--danger)}.chat-body{white-space:pre-wrap;word-break:break-word;font-size:13.5px}.chat-system{color:var(--muted);background:var(--surface-2);text-align:center;border-radius:999px;align-self:center;padding:3px 10px;font-size:11.5px}.chat-input-row{align-items:center;gap:6px;display:flex}.chat-send{border:1px solid var(--border);background:var(--surface-2)}.chip-danger{color:#b91c1c!important;background:#fee2e2!important;border-color:#fecaca!important}@media (width<=980px){.sess-grid{grid-template-columns:1fr}.board-stage{height:420px}}