:root{--bg:#f5f5f7;--panel:#fff;--panel2:#f1f1f3;--text:#111;--muted:#666;--line:#e5e5e5;--accent:#7c5cff;--accent2:#22c55e;--danger:#ff4d6d}*{box-sizing:border-box}html,body{height:100%}body{color:var(--text);background:var(--bg);margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}.container{max-width:980px;margin:0 auto;padding:28px 18px 60px}.header{justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;display:flex}.brand{align-items:center;gap:10px;display:flex}.logo{background:linear-gradient(135deg,#7c5cff,#22c55ef2);border-radius:14px;width:38px;height:38px;box-shadow:0 10px 25px #7c5cff2e}.title{letter-spacing:.2px;font-size:20px;font-weight:900}.small{color:var(--muted);font-size:12px}.badge{background:var(--panel2);border:1px solid var(--line);color:var(--muted);border-radius:999px;align-items:center;gap:8px;padding:7px 10px;font-size:12px;display:inline-flex}.grid{grid-template-columns:1.2fr .8fr;gap:16px;display:grid}@media (max-width:860px){.grid{grid-template-columns:1fr}}.card{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 10px 30px #00000014}.h1{letter-spacing:-.6px;margin:0 0 10px;font-size:38px;line-height:1.05}.p{color:var(--muted);margin:0 0 16px}.fieldLabel{color:var(--muted);margin-bottom:6px;font-size:12px}.input{border:1px solid var(--line);width:100%;color:var(--text);background:#fff;border-radius:14px;outline:none;padding:12px}.row{flex-wrap:wrap;gap:10px;display:flex}.pill{border:1px solid var(--line);background:var(--panel2);color:var(--text);cursor:pointer;border-radius:999px;padding:10px 12px;font-size:14px}.pillInactive{opacity:.6}.btn{cursor:pointer;color:#fff;background:#111;border:none;border-radius:14px;padding:12px 14px;font-weight:900}.btn:hover{background:#222}.btnGhost{border:1px solid var(--line);cursor:pointer;color:var(--text);background:#fff;border-radius:14px;padding:12px 14px;font-weight:800}.btnDanger{background:var(--danger);color:#fff;border:none}.btnDanger:hover{opacity:.9}.kpi{flex-wrap:wrap;gap:10px;display:flex}.kpiItem{background:var(--panel2);border:1px solid var(--line);border-radius:16px;flex:1;min-width:150px;padding:12px}.kpiNum{font-size:24px;font-weight:950}.kpiLabel{color:var(--muted);font-size:12px}.list{margin:10px 0 0;padding:0;list-style:none}.list li{border:1px solid var(--line);background:#fff;border-radius:14px;justify-content:space-between;align-items:center;margin-bottom:8px;padding:10px;display:flex}.hr{background:var(--line);border:0;height:1px;margin:14px 0}code{background:var(--panel2);border-radius:9px;padding:2px 6px}.notice{color:var(--text);background:#22c55e1a;border:1px solid #22c55e40;border-radius:16px;padding:10px 12px}html.classmate-board-drawing,html.classmate-board-drawing body,html.classmate-board-drawing .classmate-session-messages-list{-webkit-user-select:none!important;user-select:none!important}body.classmate-board-fullscreen{overflow:hidden}.classmate-push-bell-wrap{align-items:center;display:inline-flex}.classmate-push-bell{color:#6b7280;cursor:pointer;background:#fff;border:2px solid #e5e7eb;border-radius:999px;align-items:center;gap:6px;min-height:40px;padding:0 12px 0 10px;font-size:12px;font-weight:900;line-height:1;transition:transform .15s,box-shadow .2s,background .2s,border-color .2s;display:inline-flex}.classmate-push-bell:active:not(:disabled){transform:scale(.94)}.classmate-push-bell--off:hover:not(:disabled){background:#f9fafb;border-color:#cbd5e1}.classmate-push-bell--on{color:#15803d;background:linear-gradient(#ecfdf5 0%,#dcfce7 100%);border-color:#22c55e;animation:2.4s ease-in-out infinite classmate-bell-glow;box-shadow:0 0 0 3px #22c55e38,0 4px 14px #22c55e2e}.classmate-push-bell--busy{cursor:wait;opacity:.92}.classmate-push-bell-icon{transform-origin:50% 0;font-size:18px;display:inline-flex}.classmate-push-bell-label{letter-spacing:.04em;text-align:center;min-width:1.6em}.classmate-push-bell--wiggle .classmate-push-bell-icon{animation:.65s ease-in-out classmate-bell-wiggle}.classmate-push-bell--busy .classmate-push-bell-icon{animation:.8s ease-in-out infinite classmate-bell-wiggle}.classmate-push-bell-toast{z-index:80;color:#374151;background:#fff;border:1px solid #e5e7eb;border-radius:12px;min-width:220px;max-width:min(280px,72vw);padding:10px 12px;font-size:12px;font-weight:800;line-height:1.45;animation:.28s ease-out classmate-bell-toast-in;position:absolute;top:calc(100% + 8px);right:0;box-shadow:0 10px 28px #0f172a24}.classmate-push-bell-toast--on{color:#166534;background:#f0fdf4;border-color:#86efac}.classmate-push-bell-toast--busy{color:#92400e;background:#fffbeb;border-color:#fde68a}@keyframes classmate-bell-wiggle{0%,to{transform:rotate(0)}12%{transform:rotate(16deg)}24%{transform:rotate(-14deg)}36%{transform:rotate(10deg)}48%{transform:rotate(-8deg)}60%{transform:rotate(5deg)}72%{transform:rotate(-3deg)}}@keyframes classmate-bell-glow{0%,to{box-shadow:0 0 0 3px #22c55e38,0 4px 14px #22c55e2e}50%{box-shadow:0 0 0 6px #22c55e1f,0 6px 18px #22c55e3d}}@keyframes classmate-bell-toast-in{0%{opacity:0;transform:translateY(-6px)scale(.96)}to{opacity:1;transform:translateY(0)scale(1)}}