:root{--primary:#6366f1;--primary-hover:#4f46e5;--primary-light:#eef2ff;--bg:#f8f9fc;--card-bg:#fff;--text:#1f2937;--text-muted:#6b7280;--border:#e5e7eb;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--radius:12px;--shadow:0 1px 4px #00000014, 0 4px 16px #0000000f}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}.container{max-width:900px;margin:0 auto;padding:0 20px}.container-sm{max-width:600px;margin:0 auto;padding:0 20px}.btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-size:15px;font-weight:500;transition:all .15s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-secondary{color:var(--text);background:#eee}.btn-secondary:hover:not(:disabled){background:#ddd}.btn-danger{background:var(--danger);color:#fff}.btn-ghost{color:var(--primary);border:1.5px solid var(--primary);background:0 0}.btn-ghost:hover:not(:disabled){background:var(--primary-light)}.btn-lg{padding:14px 28px;font-size:16px}.btn-sm{padding:6px 12px;font-size:13px}.btn-full{width:100%}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.badge{letter-spacing:.3px;border-radius:20px;padding:3px 10px;font-size:12px;font-weight:600;display:inline-block}.badge-green{color:#065f46;background:#d1fae5}.badge-yellow{color:#92400e;background:#fef3c7}.badge-red{color:#991b1b;background:#fee2e2}.badge-blue{color:#1e40af;background:#dbeafe}.badge-gray{color:#374151;background:#f3f4f6}.badge-purple{color:#5b21b6;background:#ede9fe}.form-group{margin-bottom:20px}.form-label{color:var(--text);margin-bottom:6px;font-size:14px;font-weight:600;display:block}.form-hint{color:var(--text-muted);margin-bottom:8px;font-size:13px}.form-input{border:1.5px solid var(--border);background:#fff;border-radius:8px;width:100%;padding:10px 14px;font-size:15px;transition:all .15s}.form-input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #6366f11f}.form-textarea{resize:vertical;min-height:90px}.form-error{color:var(--danger);margin-top:4px;font-size:13px}.radio-group,.checkbox-group{flex-direction:column;gap:10px;display:flex}.radio-option,.checkbox-option{border:1.5px solid var(--border);cursor:pointer;background:#fff;border-radius:8px;align-items:flex-start;gap:12px;padding:12px 16px;transition:all .15s;display:flex}.radio-option:hover,.checkbox-option:hover,.radio-option.selected,.checkbox-option.selected{border-color:var(--primary);background:var(--primary-light)}.radio-option input,.checkbox-option input{accent-color:var(--primary);margin-top:2px}.radio-label,.checkbox-label{font-size:15px;line-height:1.4}.radio-description{color:var(--text-muted);margin-top:2px;font-size:13px}.progress-bar{background:var(--border);border-radius:4px;width:100%;height:4px;overflow:hidden}.progress-fill{background:var(--primary);height:100%;transition:width .3s}.alert{border-left:4px solid;border-radius:8px;padding:16px 20px;font-size:14px;line-height:1.6}.alert-warning{border-color:var(--warning);color:#78350f;background:#fffbeb}.alert-info{border-color:var(--primary);color:#1e3a8a;background:#eff6ff}.alert-success{border-color:var(--success);color:#14532d;background:#f0fdf4}.alert-danger{border-color:var(--danger);color:#7f1d1d;background:#fef2f2}.page-header{background:var(--card-bg);border-bottom:1px solid var(--border);z-index:50;margin-bottom:32px;padding:16px 0;position:sticky;top:0}.page-header-inner{justify-content:space-between;align-items:center;max-width:1100px;margin:0 auto;padding:0 24px;display:flex}.logo-text{color:var(--primary);letter-spacing:-.3px;font-size:18px;font-weight:700}.page-section{padding:32px 0 48px}.section-title{margin-bottom:8px;font-size:26px;font-weight:700}.section-subtitle{color:var(--text-muted);margin-bottom:28px;font-size:16px}.class-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;display:grid}.divider{border:none;border-top:1px solid var(--border);margin:24px 0}.score-ring{border:5px solid var(--primary);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:72px;height:72px;font-weight:700;display:flex}.score-value{font-size:20px;line-height:1}.score-label{color:var(--text-muted);font-size:10px}.admin-layout{min-height:100vh;display:flex}.admin-sidebar{color:#cdd6f4;background:#1e1e2e;flex-shrink:0;width:220px;padding:24px 0}.admin-sidebar-logo{color:#cba6f7;border-bottom:1px solid #ffffff14;margin-bottom:16px;padding:0 20px 24px;font-size:16px;font-weight:700}.admin-nav-item{cursor:pointer;color:#a6adc8;border-radius:0;padding:10px 20px;font-size:14px;transition:all .15s;display:block}.admin-nav-item:hover,.admin-nav-item.active{color:#cba6f7;background:#cba6f71f}.admin-main{background:var(--bg);flex:1;padding:32px;overflow-y:auto}.admin-page-title{margin-bottom:24px;font-size:22px;font-weight:700}.data-table{border-collapse:collapse;width:100%;font-size:14px}.data-table th{text-align:left;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);border-bottom:2px solid var(--border);padding:10px 14px;font-size:12px;font-weight:600}.data-table td{border-bottom:1px solid var(--border);vertical-align:middle;padding:12px 14px}.data-table tr:last-child td{border-bottom:none}.data-table tr:hover td{background:var(--primary-light)}@keyframes spin{to{transform:rotate(360deg)}}.spinner{border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:32px;height:32px;margin:40px auto;animation:.7s linear infinite spin}@media (width<=640px){.container,.container-sm{padding:0 16px}.admin-sidebar{display:none}.admin-main{padding:20px}.section-title{font-size:22px}}