.qb-stats{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:18px}.qb-stat{background:var(--card, #fff);border:1px solid var(--border, #e5e7eb);border-radius:10px;padding:12px 16px;min-width:120px}.qb-stat-sm{min-width:84px;padding:10px 12px}.qb-stat-n{display:block;font-size:1.5rem;font-weight:700;line-height:1.1}.qb-stat-sm .qb-stat-n{font-size:1.15rem}.qb-stat-l{display:block;font-size:.78rem;opacity:.7;margin-top:2px}.qb-tabs{display:flex;gap:4px;margin-bottom:14px;border-bottom:1px solid var(--border, #e5e7eb)}.qb-tab{background:none;border:none;border-bottom:2px solid transparent;padding:9px 14px;font:inherit;font-weight:500;cursor:pointer;opacity:.65;color:inherit}.qb-tab:hover{opacity:.9}.qb-tab.active{opacity:1;font-weight:600;border-bottom-color:var(--primary, #4f46e5)}.qb-toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}.qb-toolbar .input{width:auto}.qb-toolbar-right{margin-left:auto;display:flex;gap:8px}.qb-table td:first-child{max-width:520px}.qb-prompt{white-space:pre-wrap;word-break:break-word;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.qb-answer{font-size:.8rem;opacity:.7;margin-top:4px}.qb-acc{opacity:.7}.qb-err{color:var(--danger, #dc2626)}.qb-opt-row{display:flex;align-items:center;gap:8px;margin-bottom:6px}.qb-opt-row .input{flex:1 1 auto}.qb-opt-row input[type=radio]{flex:0 0 auto;width:16px;height:16px;cursor:pointer}.qb-grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}.qb-check{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.qb-check input[type=checkbox]{width:16px;height:16px}.qb-check small{flex-basis:100%}.qb-json{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.85rem}.qb-chips{display:flex;flex-wrap:wrap;gap:6px}.qb-chip{border:1px solid var(--border, #e5e7eb);background:transparent;border-radius:999px;padding:4px 11px;font:inherit;font-size:.82rem;cursor:pointer;color:inherit}.qb-chip:hover{border-color:var(--primary, #4f46e5)}.qb-chip.on{background:var(--primary, #4f46e5);border-color:var(--primary, #4f46e5);color:#fff}.qb-chip-n{opacity:.65;font-size:.75em;margin-left:3px}.qb-preview{margin-top:10px}.qb-preview-item{border:1px solid var(--border, #e5e7eb);border-radius:8px;padding:10px 12px;margin-top:8px}.qb-preview-prompt{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.82rem;line-height:1.5;white-space:pre-wrap;word-break:break-word;margin:0 0 8px;background:#7f7f7f14;border-radius:6px;padding:9px 11px;overflow-x:auto}.qb-samples{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:12px}.qb-sample{border:1px solid var(--border, #e5e7eb);border-radius:10px;padding:12px}.qb-sample-head{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:8px;font-size:.78rem}.qb-sample-opts{margin:0;padding-left:20px;font-size:.85rem}.qb-sample-opts li{margin-bottom:3px}.qb-sample-opts li.correct{font-weight:600;color:var(--success, #16a34a)}:root{--bg: #0f1220;--bg-2: #171a2b;--panel: #1c2036;--panel-2: #232843;--border: #2c3252;--text: #e8eaf3;--muted: #9aa0bd;--primary: #6c5ce7;--primary-2: #8a7bff;--success: #22c55e;--danger: #ef4444;--warn: #f59e0b;--radius: 12px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);font-size:14px}a{color:inherit;text-decoration:none}.loading-screen{display:grid;place-items:center;height:100vh;color:var(--muted)}.login-page{min-height:100vh;display:grid;place-items:center;background:radial-gradient(1200px 600px at 20% -10%,#2a2660 0%,transparent 60%),radial-gradient(1000px 500px at 100% 100%,#17324a 0%,transparent 55%),var(--bg)}.login-card{width:360px;background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:32px;box-shadow:0 20px 60px #0006}.login-brand{text-align:center;margin-bottom:24px}.login-brand h1{margin:12px 0 2px;font-size:22px}.login-brand p{margin:0;color:var(--muted)}.brand-mark{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-2));font-weight:800;color:#fff}.brand-mark.big{width:56px;height:56px;font-size:20px}.field{display:block;margin-bottom:16px}.field>span{display:block;margin-bottom:6px;color:var(--muted);font-size:13px}.field input,.field select,.field textarea,.input{width:100%;padding:10px 12px;border-radius:10px;background:var(--bg-2);border:1px solid var(--border);color:var(--text);outline:none;font-size:14px}.field input:focus,.field select:focus,.field textarea:focus,.input:focus{border-color:var(--primary)}.btn{display:inline-flex;align-items:center;gap:6px;cursor:pointer;padding:9px 14px;border-radius:10px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);font-size:14px;font-weight:600;transition:filter .15s ease,transform .05s ease}.btn:hover{filter:brightness(1.1)}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.6;cursor:default}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));border-color:transparent}.btn-ghost{background:transparent}.btn-danger{background:var(--danger);border-color:transparent}.btn-success{background:var(--success);border-color:transparent}.btn-block{width:100%;justify-content:center;margin-top:8px}.btn-sm{padding:5px 10px;font-size:13px}.icon-btn{background:transparent;border:none;color:var(--text);font-size:20px;cursor:pointer}.admin-shell{display:grid;grid-template-columns:240px 1fr;height:100vh}.admin-shell.collapsed{grid-template-columns:72px 1fr}.admin-sidebar{background:var(--bg-2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto}.brand{display:flex;align-items:center;gap:10px;padding:18px 16px}.brand-name{font-weight:800;font-size:16px}.admin-nav{display:flex;flex-direction:column;padding:8px;gap:2px}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;color:var(--muted);font-weight:600;white-space:nowrap}.nav-item:hover{background:var(--panel);color:var(--text)}.nav-item.active{background:var(--panel-2);color:#fff}.nav-icon{width:20px;text-align:center}.admin-main{display:flex;flex-direction:column;overflow:hidden}.admin-topbar{display:flex;align-items:center;gap:12px;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--bg-2)}.spacer{flex:1}.admin-user{display:flex;align-items:center;gap:12px}.admin-user-info{display:flex;flex-direction:column;align-items:flex-end}.role-badge{font-size:11px;color:var(--primary-2);text-transform:uppercase;letter-spacing:.5px}.admin-content{padding:24px;overflow-y:auto}.page-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:20px}.page-title{margin:0;font-size:22px}.page-subtitle{margin:4px 0 0;color:var(--muted)}.page-actions{display:flex;gap:8px}.muted{color:var(--muted)}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}.stat-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px}.stat-title{color:var(--muted);font-size:13px}.stat-value{font-size:30px;font-weight:800;margin:6px 0}.stat-sub{color:var(--muted);font-size:12px}.quick-actions{margin-top:28px}.qa-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border)}.table th{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.4px}.table tbody tr:hover{background:var(--panel-2)}.table-actions{display:flex;gap:6px}.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:700}.pill-green{background:#22c55e26;color:#4ade80}.pill-gray{background:#9aa0bd26;color:var(--muted)}.pill-red{background:#ef444426;color:#f87171}.pill-amber{background:#f59e0b26;color:#fbbf24}.alert{padding:10px 14px;border-radius:10px;margin-bottom:16px}.alert-error{background:#ef44441f;border:1px solid rgba(239,68,68,.4);color:#fca5a5}.alert-success{background:#22c55e1f;border:1px solid rgba(34,197,94,.4);color:#86efac}.empty-state{text-align:center;color:var(--muted);padding:60px 20px}.empty-icon{font-size:42px;margin-bottom:12px}.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:16px;flex-wrap:wrap}.toolbar .input,.toolbar select{max-width:260px}.modal-overlay{position:fixed;inset:0;background:#0000008c;display:grid;place-items:center;z-index:100;padding:20px}.modal{width:100%;max-width:560px;max-height:90vh;overflow-y:auto;background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:24px}.modal-lg{max-width:820px}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.modal-header h2{margin:0;font-size:18px}.modal-footer{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}textarea.input{min-height:90px;resize:vertical;font-family:inherit}.content-editor{display:flex;flex-direction:column;gap:12px}.ce-module{border:1px solid var(--border);border-radius:10px;background:var(--bg-2)}.ce-module-head{display:flex;align-items:center;gap:8px;padding:10px}.ce-module-head .input{flex:1}.ce-lessons{padding:0 12px 12px 34px;display:flex;flex-direction:column;gap:10px}.ce-lesson{border:1px solid var(--border);border-radius:8px;padding:10px;background:var(--panel);display:flex;flex-direction:column;gap:8px}.ce-lesson-head{display:flex;align-items:center;gap:8px}.ce-lesson-head .input{flex:1}.ce-kc{margin-top:10px;padding:12px;border:1px dashed var(--border);border-radius:10px;background:#6c5ce70f}.ce-kc-head{display:flex;align-items:center;justify-content:space-between;font-weight:600;font-size:13px}.ce-kc-hint{margin:8px 0 0;font-size:12px;color:var(--muted)}.ce-kc-pool{display:flex;align-items:flex-end;flex-wrap:wrap;gap:12px;margin-top:10px;padding:10px;border:1px solid var(--border);border-radius:8px;background:var(--bg-2)}.ce-kc-pool-check{display:flex;align-items:center;gap:6px;font-size:12px}.ce-kc-pool-field{display:flex;flex-direction:column;gap:4px;font-size:11px;color:var(--muted)}.ce-kc-pool-field .input{width:110px}.ce-kc-pool-field.wide{flex:1;min-width:180px}.ce-kc-pool-field.wide .input{width:100%}.ce-kc-q{margin-top:10px;padding:10px;border:1px solid var(--border);border-radius:8px;background:var(--bg-2);display:flex;flex-direction:column;gap:8px}.ce-kc-opt{display:flex;align-items:center;gap:8px}.ce-kc-opt input[type=radio]{accent-color:var(--success);flex:0 0 auto}.pager{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}.pager-info{font-size:13px;color:var(--muted, #7a869a)}.pager-controls{display:flex;flex-wrap:wrap;align-items:center;gap:6px}.pager-ellipsis{padding:0 4px;color:var(--muted, #7a869a)}