body{padding:0}.cb-wrap{padding:28px 20px 52px;max-width:1100px;margin:0 auto}.cb-hero h1{font-size:30px;font-weight:800;letter-spacing:-.5px;margin-bottom:6px}.cb-hero p{font-size:14px;color:var(--text-muted);font-family:var(--font-mono);font-weight:500}.cb-tabs{display:flex;gap:7px;flex-wrap:wrap;margin:24px 0 18px}.cb-tab{font-size:12.5px;font-weight:800;padding:7px 16px;border-radius:99px;border:1.5px solid var(--border2);background:var(--surface);color:var(--text-muted);cursor:pointer;transition:all .15s;font-family:var(--font-mono)}.cb-tab.active,.cb-tab:hover{background:#ede9fe;border-color:#a78bfa;color:#4c1d95}.cb-layout{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start}@media (max-width: 700px){.cb-layout{grid-template-columns:1fr}}.cb-concept{background:var(--surface);border:1.5px solid var(--border);border-radius:16px;padding:20px 18px;box-shadow:var(--shadow-sm)}.cb-concept h2{font-size:17px;font-weight:800;margin-bottom:8px}.cb-concept p{font-size:13px;color:var(--text-muted);font-weight:600;line-height:1.7;margin-bottom:12px}.cb-example-label{font-size:11px;font-family:var(--font-mono);font-weight:800;color:var(--text-dim);margin-bottom:4px}.cb-code-block{background:#1e1e2e;border-radius:10px;padding:14px 16px;font-family:var(--font-mono);font-size:13px;line-height:1.8;color:#cdd6f4;overflow-x:auto;margin-bottom:12px;cursor:pointer;border:1.5px solid #313244;transition:border-color .15s}.cb-code-block:hover{border-color:#a78bfa}.cb-code-block .kw{color:#cba6f7}.cb-code-block .str{color:#a6e3a1}.cb-code-block .num{color:#fab387}.cb-code-block .cmt{color:#6c7086;font-style:italic}.cb-code-block .fn{color:#89dceb}.cb-code-block .op{color:#f38ba8}.cb-tip{font-size:12px;font-weight:700;padding:9px 12px;border-radius:9px;border-left:3px solid #a78bfa;background:#ede9fe;color:#4c1d95;line-height:1.6}.cb-editor-panel{background:var(--surface);border:1.5px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm)}.cb-editor-toolbar{display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1.5px solid var(--border);background:var(--surface2)}.cb-editor-toolbar span{font-size:11px;font-family:var(--font-mono);font-weight:800;color:var(--text-dim);margin-right:auto}.cb-run-btn{font-size:12px;font-weight:800;padding:6px 18px;border-radius:99px;background:#4f46e5;color:#fff;border:none;cursor:pointer;font-family:var(--font-mono);transition:background .15s}.cb-run-btn:hover{background:#4338ca}.cb-clear-btn{font-size:12px;font-weight:800;padding:6px 14px;border-radius:99px;background:var(--surface);color:var(--text-muted);border:1.5px solid var(--border2);cursor:pointer;font-family:var(--font-mono);transition:all .15s}.cb-clear-btn:hover{color:var(--text);background:var(--surface2)}#cb-editor{width:100%;min-height:220px;resize:vertical;background:#1e1e2e;color:#cdd6f4;font-family:var(--font-mono);font-size:13.5px;line-height:1.75;border:none;outline:none;padding:16px 18px;tab-size:2;-moz-tab-size:2;box-sizing:border-box}#cb-output{background:#11111b;min-height:90px;max-height:200px;overflow-y:auto;font-family:var(--font-mono);font-size:13px;line-height:1.7;padding:12px 16px;border-top:1.5px solid #313244}.cb-out-line{color:#a6e3a1;font-weight:600;white-space:pre-wrap;word-break:break-all}.cb-out-err{color:#f38ba8;font-weight:700;white-space:pre-wrap}.cb-out-info{color:#6c7086;font-style:italic;font-weight:600}.cb-quiz{margin-top:24px;background:var(--surface);border:1.5px solid var(--border);border-radius:16px;padding:20px 18px;box-shadow:var(--shadow-sm)}.cb-quiz h2{font-size:16px;font-weight:800;margin-bottom:14px}.cb-quiz-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:10px}.cb-q-card{background:var(--surface2);border-radius:12px;padding:14px;cursor:pointer;border:1.5px solid var(--border2);transition:border-color .15s}.cb-q-card:hover{border-color:#a78bfa}.cb-q-card .q-text{font-size:13px;font-weight:700;margin-bottom:10px}.cb-q-card .q-options{display:flex;flex-direction:column;gap:5px}.cb-q-card .q-opt{font-size:12px;font-weight:700;padding:6px 10px;border-radius:8px;border:1.5px solid var(--border);background:var(--surface);cursor:pointer;transition:all .15s;font-family:var(--font-mono)}.cb-q-card .q-opt:hover{border-color:#a78bfa;background:#ede9fe;color:#4c1d95}.cb-q-card .q-opt.correct{border-color:#86efac;background:#d1fae5;color:#065f46}.cb-q-card .q-opt.wrong{border-color:#fca5a5;background:#fee2e2;color:#7f1d1d}.cb-q-card .q-feedback{font-size:11.5px;color:var(--text-dim);font-weight:700;margin-top:6px}