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p{font-size:12px;color:var(--text-muted);margin-top:2px;text-transform:uppercase;letter-spacing:.5px}.sidebar-user{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px}.sidebar-user img{width:42px;height:42px;border-radius:50%;border:2px solid var(--border);object-fit:cover}.sidebar-user-info{flex:1;min-width:0}.sidebar-user-info strong{display:block;font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user-info span{font-size:12px;color:var(--text-muted);display:inline-block;padding:2px 8px;border-radius:20px;margin-top:2px}.role-admin{background:#fef3c7;color:#d97706}.role-teacher{background:#dbeafe;color:#2563eb}.role-student{background:#dcfce7;color:#16a34a}.sidebar-nav{flex:1;padding:12px}.sidebar-nav-section{margin-bottom:8px}.sidebar-nav-label{font-size:10px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;padding:8px 8px 4px}.sidebar-nav a,.sidebar-nav 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var(--border);padding:20px;display:flex;align-items:center;gap:16px;box-shadow:var(--shadow)}.stat-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}.stat-icon.blue{background:#dbeafe}.stat-icon.green{background:#dcfce7}.stat-icon.yellow{background:#fef3c7}.stat-icon.purple{background:#ede9fe}.stat-info h3{font-size:26px;font-weight:800;color:var(--text)}.stat-info p{font-size:13px;color:var(--text-muted);margin-top:2px}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.table-container{overflow-x:auto}table{width:100%;border-collapse:collapse}thead th{text-align:left;padding:12px 16px;font-size:12px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border);background:#f8fafc}tbody td{padding:14px 16px;font-size:14px;border-bottom:1px solid var(--border);vertical-align:middle}tbody tr:last-child td{border-bottom:none}tbody tr:hover{background:#f8fafc}.user-cell{display:flex;align-items:center;gap:10px}.user-cell img{width:36px;height:36px;border-radius:50%;object-fit:cover;border:2px solid var(--border)}.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}.badge-blue{background:#dbeafe;color:#1d4ed8}.badge-green{background:#dcfce7;color:#15803d}.badge-yellow{background:#fef3c7;color:#b45309}.badge-gray{background:#f1f5f9;color:#475569}.badge-red{background:#fee2e2;color:#b91c1c}.login-page{min-height:100vh;display:grid;place-items:center;padding:28px;background:radial-gradient(circle at 20% 20%,rgba(99,102,241,.22),transparent 35%),radial-gradient(circle at 80% 80%,rgba(129,140,248,.15),transparent 35%),linear-gradient(135deg,#06060f,#0a0a20,#06060f);overflow:hidden}.login-shell{position:relative;width:min(100%,940px);min-height:590px;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(380px,.95fr);overflow:hidden;border:1px solid rgba(129,140,248,.2);border-radius:28px;background:#08081ad9;box-shadow:0 32px 90px #0204148c,0 0 0 1px #6366f126;-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px)}.login-showcase{position:relative;z-index:1;display:flex;flex-direction:column;justify-content:space-between;padding:44px;color:#fff;background:linear-gradient(160deg,#4f46e5eb,#06060ff5),radial-gradient(circle at 30% 70%,rgba(129,140,248,.3),transparent 60%)}.login-showcase:after{content:"";position:absolute;top:22px;right:22px;bottom:22px;left:22px;border:1px solid rgba(255,255,255,.15);border-radius:22px;pointer-events:none}.brand-mark,.mini-mark{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;font-weight:800}.brand-mark{width:58px;height:58px;border-radius:18px;color:#0f172a;background:linear-gradient(135deg,#fff,#dbeafe);box-shadow:0 18px 35px #0f172a33}.login-eyebrow{margin-bottom:14px;color:#ffffffc7;font-size:12px;font-weight:800;letter-spacing:1.2px;text-transform:uppercase}.login-showcase h1{font-size:48px;line-height:1.05;font-weight:800;margin-bottom:16px}.showcase-copy{max-width:370px;color:#ffffffd1;font-size:16px}.showcase-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.showcase-grid div{padding:18px;border:1px solid rgba(255,255,255,.16);border-radius:16px;background:#ffffff1a}.showcase-grid strong{display:block;font-size:24px;font-weight:800}.showcase-grid 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p{font-size:12px;color:#eef2ff66;margin-bottom:10px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.quick-btns{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.quick-btn{min-height:40px;padding:8px 10px;border-radius:12px;border:1.5px solid rgba(99,102,241,.2);background:#ffffff0a;font-size:12px;font-weight:800;cursor:pointer;transition:all .15s;color:#eef2ff8c;font-family:inherit}.quick-btn:hover{transform:translateY(-1px);border-color:#818cf8;color:#a5b4fc;background:#6366f11f}.error-msg{background:#fff1f2;color:var(--danger);padding:12px 14px;border:1px solid #fecdd3;border-radius:12px;font-size:13px;margin-bottom:16px}@media(max-width:820px){.login-page{padding:18px}.login-shell{grid-template-columns:1fr;min-height:auto}.login-showcase{min-height:300px;padding:30px}.login-showcase h1{font-size:38px}.login-card{padding:32px 24px}}@media(max-width:460px){.login-showcase{display:none}.login-shell{border-radius:22px}.quick-btns{grid-template-columns:1fr}}.profile-header{display:flex;align-items:center;gap:24px;padding:24px;background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:var(--radius);color:#fff;margin-bottom:20px}.profile-avatar{width:88px;height:88px;border-radius:50%;border:4px solid rgba(255,255,255,.4);object-fit:cover}.profile-header h2{font-size:24px;font-weight:800}.profile-header p{opacity:.85;margin-top:4px}.profile-info-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.profile-info-item{padding:14px 16px;background:var(--bg);border-radius:8px}.profile-info-item label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);display:block;margin-bottom:4px}.profile-info-item span{font-size:15px;font-weight:600;color:var(--text)}.class-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.class-card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);padding:20px;box-shadow:var(--shadow);cursor:pointer;transition:all .2s;text-decoration:none;color:inherit;display:block}.class-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--primary-light)}.class-card-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:12px}.class-card h3{font-size:16px;font-weight:700;margin-bottom:4px}.class-card .subject{font-size:13px;color:var(--text-muted)}.class-card-meta{display:flex;flex-direction:column;gap:6px;margin:12px 0;font-size:13px;color:var(--text-muted)}.class-card-meta span{display:flex;align-items:center;gap:6px}.progress-bar{height:6px;background:var(--border);border-radius:999px;overflow:hidden;margin-top:12px}.progress-fill{height:100%;background:var(--primary);border-radius:999px;transition:width .4s ease}.progress-label{font-size:12px;color:var(--text-muted);margin-top:4px;text-align:right}.lessons-list{display:flex;flex-direction:column;gap:8px}.lesson-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:8px;background:var(--bg);border:1px solid var(--border)}.lesson-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}.dot-completed{background:var(--success)}.dot-today{background:var(--primary)}.dot-upcoming{background:var(--border);border:2px solid #cbd5e1}.lesson-item .lesson-title{flex:1;font-size:14px;font-weight:500}.lesson-item .lesson-date{font-size:12px;color:var(--text-muted)}.section-title{font-size:16px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;justify-content:space-between}.section-title a{font-size:13px;color:var(--primary);text-decoration:none;font-weight:500}.empty-state{text-align:center;padding:40px;color:var(--text-muted)}.empty-state .emoji{font-size:40px;margin-bottom:12px}.ut-loading-state{min-height:220px;display:flex;align-items:center;justify-content:center;gap:12px;color:var(--text-muted);font-size:14px;font-weight:600}.ut-loading-ring{width:28px;height:28px;border-radius:999px;border:3px solid var(--border);border-top-color:var(--primary);animation:spin .75s linear infinite}.btn-sm{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1.5px solid var(--border);background:var(--surface);font-size:13px;font-weight:600;color:var(--text);cursor:pointer;text-decoration:none;transition:all .15s}.btn-sm:hover{border-color:var(--primary);color:var(--primary);background:#eef2ff}.btn-primary-sm{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary-sm:hover{background:var(--primary-dark);color:#fff;border-color:var(--primary-dark)}.tab-bar{display:flex;border-bottom:1px solid var(--border);padding:0 16px;background:#f8fafc;overflow-x:auto}.tab-btn{display:flex;align-items:center;gap:6px;padding:13px 16px;border:none;background:none;font-size:14px;font-weight:500;color:var(--text-muted);cursor:pointer;border-bottom:2px solid transparent;white-space:nowrap;transition:all .15s;margin-bottom:-1px}.tab-btn:hover{color:var(--text);background:var(--bg)}.tab-btn.active{color:var(--primary);font-weight:700;border-bottom-color:var(--primary)}.tab-count{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 6px;border-radius:999px;background:var(--bg);font-size:11px;font-weight:700;color:var(--text-muted)}.tab-btn.active .tab-count{background:#eef2ff;color:var(--primary)}.material-item{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--bg);border-radius:9px;border:1px solid var(--border)}.ai-chat-box{display:flex;flex-direction:column;gap:12px}.chat-message{display:flex;gap:10px;align-items:flex-start}.chat-message.user{flex-direction:row-reverse}.chat-bubble{padding:11px 16px;border-radius:14px;max-width:80%;font-size:14px;line-height:1.55}.chat-bubble.ai{background:#f1f5f9;color:var(--text);border-radius:4px 14px 14px}.chat-bubble.user{background:var(--primary);color:#fff;border-radius:14px 4px 14px 14px}.typing-dot{display:inline-block;width:7px;height:7px;background:var(--text-muted);border-radius:50%;animation:bounce 1s infinite}@keyframes bounce{0%,80%,to{transform:translateY(0)}40%{transform:translateY(-6px)}}.em-root.dark .page-header{background:var(--surface);border-bottom-color:var(--border)}.em-root.dark .page-header h2,.em-root.dark .page-header p{color:var(--text)}.em-root.dark .stat-card{background:var(--cardBg);border-color:var(--cardBorder)}.em-root.dark .stat-info h3{color:var(--text)}.em-root.dark .stat-info p{color:var(--textMuted)}.em-root.dark .stat-icon.blue{background:#3b82f626}.em-root.dark .stat-icon.green{background:#10b98126}.em-root.dark .stat-icon.yellow{background:#f59e0b26}.em-root.dark .stat-icon.purple{background:#8b5cf626}.em-root.dark .card{background:var(--cardBg);border-color:var(--cardBorder)}.em-root.dark thead th{background:var(--surface2);color:var(--textMuted);border-bottom-color:var(--border)}.em-root.dark tbody td{color:var(--text);border-bottom-color:var(--border)}.em-root.dark tbody tr:hover{background:var(--surfaceHover)}.em-root.dark .table-container table,.em-root.dark .section-title{color:var(--text)}.em-root.dark .class-card{background:var(--cardBg);border-color:var(--cardBorder);color:var(--text)}.em-root.dark .class-card:hover{border-color:var(--accentBorder)}.em-root.dark .class-card h3{color:var(--text)}.em-root.dark .class-card .subject,.em-root.dark .class-card-meta{color:var(--textMuted)}.em-root.dark .badge-blue{background:#3b82f626;color:#60a5fa}.em-root.dark .badge-green{background:#10b98126;color:#34d399}.em-root.dark .badge-yellow{background:#f59e0b26;color:#fcd34d}.em-root.dark .badge-gray{background:var(--surface2);color:var(--textMuted)}.em-root.dark .badge-red{background:#ef444426;color:#f87171}.em-root.dark .user-cell img{border-color:var(--border)}.em-root.dark .lesson-item{background:var(--surface2);border-color:var(--border)}.em-root.dark .lesson-item .lesson-title{color:var(--text)}.em-root.dark .lesson-item .lesson-date{color:var(--textMuted)}.em-root.dark .material-item{background:var(--surface2);border-color:var(--border)}.em-root.dark .tab-bar{background:var(--surface2);border-bottom-color:var(--border)}.em-root.dark .tab-btn{color:var(--textMuted)}.em-root.dark .tab-btn:hover{color:var(--text);background:var(--surfaceHover)}.em-root.dark .tab-btn.active{color:var(--accent);border-bottom-color:var(--accent)}.em-root.dark .chat-bubble.ai{background:var(--surface2);color:var(--text)}.em-root.light .page-body,.em-root.dark .page-body{background:transparent}.em-root.dark[data-role=admin],.em-root.dark[data-role=teacher]{--bg: #06060f;--bg2: #08081a;--bg3: #0a0a20;--surface: rgba(255,255,255,.04);--surface2: rgba(255,255,255,.07);--surface3: rgba(255,255,255,.1);--surfaceHover: rgba(255,255,255,.09);--glass: rgba(6,6,20,.78);--glassBorder: rgba(129,140,248,.14);--sidebarBg: rgba(6,6,15,.93);--sidebarActive: rgba(129,140,248,.13);--sidebarActBorder:rgba(129,140,248,.38);--navText: rgba(238,242,255,.45);--navTextActive: #a5b4fc;--text: #eef2ff;--text2: rgba(238,242,255,.85);--textMuted: rgba(238,242,255,.45);--textSubtle: rgba(238,242,255,.28);--border: rgba(255,255,255,.07);--border2: rgba(255,255,255,.13);--accent: #818cf8;--accentHover: #a5b4fc;--accentBg: rgba(99,102,241,.13);--accentBorder: rgba(99,102,241,.28);--cardBg: rgba(255,255,255,.04);--cardBorder: rgba(255,255,255,.08);--cardShadow: 0 4px 24px rgba(0,0,0,.32);--inputBg: rgba(255,255,255,.05);--inputBorder: rgba(99,102,241,.22);--inputFocus: rgba(99,102,241,.4);--modalBg: #08081a;--modalOverlay: rgba(0,0,0,.72);--scrollbar: rgba(255,255,255,.05);--scrollThumb: rgba(129,140,248,.35);background:#06060f;color:#eef2ff}.em-root.light[data-role=admin],.em-root.light[data-role=teacher]{--bg: #ffffff;--bg2: #f5f3ff;--bg3: #f9f8ff;--surface: #ffffff;--surface2: #f5f3ff;--surface3: #ede9fe;--surfaceHover: #ede9fe;--glass: rgba(255,255,255,.85);--glassBorder: rgba(199,210,254,.9);--sidebarBg: #ffffff;--sidebarActive: rgba(79,70,229,.09);--sidebarActBorder:rgba(79,70,229,.4);--navText: #6b7280;--navTextActive: #4f46e5;--text: #1e1b4b;--text2: 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.13s;min-width:8px}.em-ic-bar:hover{opacity:1}.em-progress-wrap{background:var(--cardBorder);border-radius:99px;height:6px;overflow:hidden}.em-progress-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--accentHover))}.em-plag-wrap{display:flex;align-items:center;gap:8px}.em-plag-bar{flex:1;background:var(--cardBorder);border-radius:99px;height:6px;overflow:hidden}.em-plag-fill{height:100%;border-radius:99px}.em-settings-section{background:var(--cardBg);border:1px solid var(--cardBorder);border-radius:14px;padding:20px;margin-bottom:16px}.em-settings-section h3{font-size:13.5px;font-weight:800;color:var(--text);margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--cardBorder)}.em-sr{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--cardBorder)}.em-sr:last-child{border-bottom:none}.em-sr-label{font-size:13px;font-weight:600;color:var(--text)}.em-sr-sub{font-size:11px;color:var(--textMuted)}.em-toggle{position:relative;width:40px;height:22px;cursor:pointer;display:inline-block}.em-toggle input{opacity:0;width:0;height:0}.em-toggle-slider{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--cardBorder);border-radius:99px;transition:.2s}.em-toggle-slider:before{content:"";position:absolute;width:16px;height:16px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:.2s}.em-toggle input:checked~.em-toggle-slider{background:var(--accent)}.em-toggle input:checked~.em-toggle-slider:before{transform:translate(18px)}.em-notif-item{display:flex;align-items:flex-start;gap:12px;padding:13px 0;border-bottom:1px solid var(--cardBorder)}.em-notif-item:last-child{border-bottom:none}.em-notif-icon{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}.em-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px}.em-modal{background:var(--cardBg);border:1px solid var(--cardBorder);border-radius:18px;padding:28px;width:100%;max-width:480px;max-height:90vh;overflow-y:auto;box-shadow:0 24px 60px #0000004d}.em-modal h2{font-size:18px;font-weight:800;margin-bottom:20px;color:var(--text)}.em-fg{margin-bottom:14px}.em-fg label{display:block;font-size:11.5px;font-weight:700;color:var(--textMuted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}.em-input,.em-select,.em-textarea{width:100%;padding:10px 13px;border-radius:9px;border:1.5px solid var(--cardBorder);background:var(--bg);color:var(--text);font-size:13px;outline:none;transition:border-color .15s;font-family:inherit}.em-input:focus,.em-select:focus,.em-textarea:focus{border-color:var(--accent)}.em-textarea{resize:vertical;min-height:90px}.em-rep-card{background:var(--cardBg);border:1px solid var(--cardBorder);border-radius:14px;padding:20px;display:flex;flex-direction:column;gap:12px}.em-rep-card-icon{font-size:28px}.em-rep-card h3{font-size:15px;font-weight:800;color:var(--text)}.em-rep-card p{font-size:12.5px;color:var(--textMuted);flex:1}.em-rep-actions{display:flex;gap:8px}.em-btn{padding:9px 16px;border-radius:9px;border:1.5px solid var(--cardBorder);background:transparent;color:var(--text);font-size:12.5px;font-weight:700;cursor:pointer;transition:all .15s;font-family:inherit}.em-btn:hover{border-color:var(--accent);color:var(--accent)}.em-btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.em-btn-primary:hover{background:var(--accentHover);border-color:var(--accentHover)}.em-btn-danger{border-color:#ef4444;color:#ef4444}.em-btn-danger:hover{background:#ef4444;color:#fff}