:root{--bg-base:#0f172a;--bg-glass:#1e293bb3;--bg-glass-hover:#1e293be6;--bg-surface:#0f172af2;--bg-deep:#0b1120;--primary-accent:#3b82f6;--primary-glow:#3b82f680;--secondary-accent:#8b5cf6;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--border-color:#ffffff1a;--border-highlight:#fff3;--blur-md:blur(12px);--blur-lg:blur(24px);--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-glow:0 0 20px var(--primary-glow);--transition-fast:.15s ease-in-out;--transition-smooth:.3s cubic-bezier(.4, 0, .2, 1);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;font-family:Inter,Roboto,system-ui,-apple-system,sans-serif}body{background-color:var(--bg-base);color:var(--text-primary);background:radial-gradient(circle at 15% 50%, #3b82f626, transparent 25%), radial-gradient(circle at 85% 30%, #8b5cf626, transparent 25%), var(--bg-base);background-attachment:fixed;flex-direction:column;min-height:100vh;margin:0;padding:0;display:flex;overflow-x:hidden}.glass-panel{background:var(--bg-glass);-webkit-backdrop-filter:var(--blur-md);border:1px solid var(--border-color);box-shadow:var(--shadow-md);border-radius:16px}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulseGlow{0%{box-shadow:0 0 0 0 var(--primary-glow)}70%{box-shadow:0 0 0 10px #3b82f600}to{box-shadow:0 0 #3b82f600}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#fff3}#root{flex-direction:column;height:100vh;display:flex}.app-container{box-sizing:border-box;flex-direction:column;width:100%;max-width:1200px;height:100vh;margin:0 auto;padding:1rem;display:flex}.header{animation:fadeIn 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1.25rem;font-size:.95rem;line-height:1.6}.message.user{background:linear-gradient(135deg, var(--primary-accent), #2563eb);color:#fff;border-bottom-right-radius:4px;box-shadow:0 4px 12px #3b82f64d}.message.agent{background:var(--bg-glass);-webkit-backdrop-filter:var(--blur-md);border:1px solid var(--border-color);color:var(--text-primary);border-bottom-left-radius:4px}.message-header{opacity:.8;align-items:center;gap:.5rem;margin-bottom:.5rem;font-size:.75rem;font-weight:600;display:flex}.input-area{align-items:flex-end;gap:1rem;padding:1rem;display:flex}.input-field{border:1px solid var(--border-highlight);color:var(--text-primary);resize:none;min-height:24px;max-height:150px;transition:border-color var(--transition-fast);background:#0f172a99;border-radius:12px;outline:none;flex:1;padding:1rem;font-family:inherit;font-size:1rem}.input-field:focus{border-color:var(--primary-accent);box-shadow:0 0 0 2px #3b82f633}.input-field::placeholder{color:var(--text-muted)}.send-button{background:var(--primary-accent);color:#fff;cursor:pointer;width:48px;height:48px;transition:all var(--transition-fast);border:none;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;margin-bottom:4px;display:flex}.send-button:hover:not(:disabled){background:#2563eb;transform:translateY(-2px);box-shadow:0 4px 12px #3b82f666}.send-button:disabled{opacity:.5;cursor:not-allowed;background:var(--text-muted)}.tool-card{border:1px dashed var(--border-highlight);color:var(--text-secondary);background:#0003;border-radius:8px;flex-direction:column;gap:.5rem;margin-top:.75rem;padding:.75rem 1rem;font-size:.85rem;display:flex}.tool-card-header{color:var(--warning);align-items:center;gap:.5rem;font-weight:500;display:flex}.typing-indicator{align-items:center;gap:4px;height:20px;display:inline-flex}.typing-indicator span{background-color:var(--text-secondary);border-radius:50%;width:6px;height:6px;animation:1.4s ease-in-out infinite both typing}.typing-indicator span:first-child{animation-delay:-.32s}.typing-indicator span:nth-child(2){animation-delay:-.16s}@keyframes typing{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.animate-spin{animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#0009;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-surface);border-radius:12px;flex-direction:column;width:90%;max-width:800px;max-height:90vh;display:flex;overflow:hidden}.modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:1.5rem;display:flex}.modal-header h2{align-items:center;gap:.5rem;margin:0;font-size:1.2rem;display:flex}.icon-btn{cursor:pointer;color:var(--text-secondary);background:0 0;border:none}.modal-body{padding:1.5rem;overflow-y:auto}.upload-dropzone{border:2px dashed var(--border-color);text-align:center;cursor:pointer;border-radius:8px;padding:3rem;transition:all .2s}.upload-dropzone:hover{border-color:var(--primary-accent);background:#0ea5e90d}.alert-box{color:#eab308;background:#eab3081a;border:1px solid #eab30833;border-radius:8px;align-items:center;gap:1rem;margin-bottom:1.5rem;padding:1rem;display:flex}.alert-box strong{color:#fff;margin-bottom:.2rem;display:block}.alert-box p{color:var(--text-secondary);margin:0;font-size:.9rem}.status-summary{grid-template-columns:repeat(4,1fr);gap:1rem;margin-bottom:1.5rem;display:grid}.stat-card{background:var(--bg-deep);border-radius:6px;justify-content:space-between;padding:.8rem;font-weight:700;display:flex}.stat-card.success{color:#22c55e}.stat-card.warning{color:#eab308}.stat-card.danger{color:#ef4444}.file-list{flex-direction:column;gap:.5rem;display:flex}.file-row{background:var(--bg-deep);border-radius:4px;grid-template-columns:2fr 1fr auto;align-items:center;padding:.5rem;font-size:.9rem;display:grid}.file-row 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var(--border-color);align-items:center;gap:.5rem;margin:0;padding:1rem;font-size:1rem;display:flex}.class-list{padding:1rem}.class-group{margin-bottom:1rem}.class-name{color:var(--text-secondary);margin-bottom:.5rem;font-size:.9rem;font-weight:700}.student-list{flex-direction:column;gap:.2rem;padding-left:.5rem;display:flex}.student-btn{color:var(--text-primary);text-align:left;cursor:pointer;background:0 0;border:none;border-radius:4px;align-items:center;gap:.5rem;padding:.4rem .5rem;transition:all .2s;display:flex}.student-btn:hover{background:#ffffff0d}.student-btn.active{background:var(--primary-accent);color:#fff}.dashboard-main{flex-direction:column;flex:1;padding:1.5rem;display:flex;overflow-y:auto}.student-content{flex-direction:column;gap:1.5rem;width:100%;max-width:900px;margin:0 auto;display:flex}.section-title{color:var(--primary-accent);align-items:center;gap:.5rem;margin:0;display:flex}.radar-section{border-radius:12px;padding:1rem}.radar-wrapper{width:100%;height:250px;margin-top:1rem}.records-section,.records-grid{flex-direction:column;gap:1rem;display:flex}.record-card{border-radius:12px;flex-direction:column;gap:.8rem;padding:1.2rem;display:flex}.record-header{justify-content:space-between;display:flex}.exam-tag{background:#0000004d;border-radius:12px;padding:2px 8px;font-size:.8rem}.subject-tag{color:var(--success);font-size:.8rem}.record-question{font-size:1rem;line-height:1.6}.question-num{color:var(--primary-accent);margin-right:.5rem;font-weight:700}.record-footer{justify-content:space-between;align-items:flex-end;margin-top:.5rem;display:flex}.tags-container{flex-wrap:wrap;gap:.5rem;display:flex}.knowledge-tag{color:var(--secondary-accent);background:#8b5cf61a;border:1px solid #8b5cf633;border-radius:4px;align-items:center;gap:2px;padding:2px 6px;font-size:.75rem;display:flex}.empty-tag{color:var(--text-muted);font-size:.75rem}.date-tag{color:var(--text-muted);font-size:.8rem}.empty-text{color:var(--text-muted);font-size:.9rem}.print-only{display:none}@media print{@page{margin:15mm;size:A4}body{color:#000!important;background:#fff!important}.no-print,.header,.chat-container,.input-area{display:none!important}.dashboard-overlay{background:0 0!important;padding:0!important;position:static!important}.dashboard-container{height:auto!important;box-shadow:none!important;background:0 0!important;border:none!important;padding:0!important;display:block!important}.dashboard-body{display:block!important;overflow:visible!important}.dashboard-main{padding:0!important;overflow:visible!important}.student-content{gap:2rem!important;max-width:100%!important;margin:0!important}.print-only{display:block}.print-title{text-align:center;border-bottom:2px solid #333;margin-bottom:2rem;padding-bottom:1rem}.print-title h2{color:#000;margin:0 0 .5rem;font-size:24pt}.print-title p{color:#666;margin:0;font-size:12pt}.record-card{page-break-inside:avoid;margin-bottom:1rem;background:0 0!important;border:none!important;border-bottom:1px dashed #ccc!important;border-radius:0!important;padding:1rem 0 2rem!important}.record-question{color:#000;font-size:14pt}.question-num{color:#000}.answer-space{border:1px solid #0000;min-height:150px;margin-top:1rem}}.text-green{color:#22c55e}.text-red{color:#ef4444}.login-overlay{z-index:9999;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:radial-gradient(circle,#0f172ae6 0%,#000000f2 100%);justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.login-box{background:#0f172a99;border:1px solid #ffffff1a;border-radius:16px;flex-direction:column;gap:2rem;width:90%;max-width:400px;padding:2.5rem 2rem;display:flex;box-shadow:0 25px 50px -12px #00000080}.login-header{text-align:center;flex-direction:column;align-items:center;gap:1rem;display:flex}.login-header h2{color:#fff;margin:0;font-size:1.5rem}.login-header p{color:var(--text-secondary);margin:0;font-size:.9rem}.login-form{flex-direction:column;gap:1.5rem;display:flex}.login-input{border:1px solid var(--border-color);color:#fff;text-align:center;letter-spacing:.2rem;box-sizing:border-box;background:#0000004d;border-radius:8px;width:100%;padding:1rem;font-size:1.1rem;transition:all .3s}.login-input:focus{border-color:var(--primary-accent);outline:none;box-shadow:0 0 0 2px #0ea5e94d}.login-btn{border-radius:8px;justify-content:center;align-items:center;gap:.5rem;width:100%;padding:1rem;font-size:1.1rem;font-weight:700;display:flex}.login-error{color:#ef4444;background:#ef44441a;border-radius:6px;justify-content:center;align-items:center;gap:.5rem;padding:.8rem;font-size:.9rem;display:flex}