.et-cbt-root{--cbt-blue:#036;--cbt-blue-mid:#1a4f8a;--cbt-header:#0d2b4a;--cbt-bg:#dfe6ee;--cbt-panel:#fff;--cbt-green:#1b8a3e;--cbt-red:#c62828;--cbt-gray:#9e9e9e;--cbt-violet:#6a1b9a;--cbt-orange:#ef6c00;--cbt-edu-blue:#1565c0;--cbt-edu-header:#0d47a1;color:#111;background:var(--cbt-bg);min-height:100vh;font-family:Tahoma,Segoe UI,Arial,sans-serif;font-size:14px}.et-cbt-root *{box-sizing:border-box}.et-cbt-header{color:#fff;background:linear-gradient(#0d2b4a 0%,#036 100%);border-bottom:3px solid #c9a227;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;padding:8px 12px;display:flex}.et-cbt-header strong{letter-spacing:.02em;font-size:15px}.et-cbt-meta{opacity:.95;flex-wrap:wrap;gap:12px 18px;font-size:12px;display:flex}.et-cbt-timer{color:#b71c1c;font-variant-numeric:tabular-nums;text-align:center;background:#fff;border:1px solid #90a4ae;border-radius:2px;min-width:5.5rem;padding:4px 10px;font-weight:700}.et-cbt-body{grid-template-columns:220px 1fr;gap:0;min-height:calc(100vh - 52px);display:grid}@media (max-width:860px){.et-cbt-body{grid-template-columns:1fr}.et-cbt-palette{order:2;max-height:220px}}.et-cbt-palette{background:#e8eef5;border-right:1px solid #90a4ae;padding:10px;overflow:auto}.et-cbt-palette h3{color:var(--cbt-blue);margin:0 0 8px;font-size:13px}.et-cbt-legend{color:#333;gap:4px;margin-bottom:10px;font-size:11px;display:grid}.et-cbt-legend span{align-items:center;gap:6px;display:inline-flex}.et-cbt-dot{border:1px solid #555;border-radius:2px;flex-shrink:0;width:14px;height:14px;display:inline-block}.et-cbt-dot-green{background:var(--cbt-green);border-color:#0d5c28}.et-cbt-dot-red{background:var(--cbt-red);border-color:#8e0000}.et-cbt-dot-gray{background:var(--cbt-gray)}.et-cbt-dot-violet{background:var(--cbt-violet)}.et-cbt-dot-violet-check{background:var(--cbt-violet);position:relative}.et-cbt-dot-violet-check:after{content:"✓";color:#fff;justify-content:center;align-items:center;font-size:10px;display:flex;position:absolute;inset:0}.et-cbt-grid{grid-template-columns:repeat(5,1fr);gap:6px;display:grid}.et-cbt-qbtn{cursor:pointer;color:#fff;background:var(--cbt-gray);border:1px solid #555;border-radius:2px;height:32px;font-size:12px;font-weight:600}.et-cbt-qbtn[data-status=answered]{background:var(--cbt-green)}.et-cbt-qbtn[data-status=not_answered]{background:var(--cbt-red)}.et-cbt-qbtn[data-status=not_visited]{background:var(--cbt-gray)}.et-cbt-qbtn[data-status=marked]{background:var(--cbt-violet)}.et-cbt-qbtn[data-status=answered_marked]{background:var(--cbt-violet);box-shadow:inset 0 0 0 2px #fff}.et-cbt-qbtn[data-current="1"]{outline-offset:1px;outline:2px solid #ffeb3b}.et-cbt-main{background:var(--cbt-panel);flex-direction:column;gap:12px;padding:12px 16px 24px;display:flex}.et-cbt-toolbar{border-bottom:1px solid #cfd8dc;flex-wrap:wrap;align-items:center;gap:8px;padding-bottom:8px;display:flex}.et-cbt-btn{color:#102027;cursor:pointer;background:#eceff1;border:1px solid #455a64;border-radius:2px;padding:6px 12px;font-size:12px;font-weight:600}.et-cbt-btn:hover{filter:brightness(.97)}.et-cbt-btn-primary{color:#fff;background:#1565c0;border-color:#0d47a1}.et-cbt-btn-mark{color:#fff;background:#ef6c00;border-color:#e65100}.et-cbt-btn-danger{color:#fff;background:#c62828;border-color:#8e0000}.et-cbt-lang{align-items:center;gap:6px;margin-left:auto;font-size:12px;display:flex}.et-cbt-qnum{color:var(--cbt-blue);margin-bottom:6px;font-weight:700}.et-cbt-qtext{white-space:pre-line;margin-bottom:14px;font-size:15px;line-height:1.55}.et-cbt-opt{cursor:pointer;background:#fafafa;border:1px solid #b0bec5;border-radius:2px;align-items:flex-start;gap:10px;margin-bottom:8px;padding:8px 10px;display:flex}.et-cbt-opt:hover{background:#e3f2fd}.et-cbt-opt[data-selected="1"]{background:#e8f5e9;border-color:#2e7d32}.et-cbt-opt input{margin-top:3px}.et-cbt-footer-note{color:#546e7a;margin-top:auto;padding-top:12px;font-size:11px}.et-edu-root{--edu-header:#0d47a1;--edu-accent:#1565c0;--edu-bg:#f4f6f9;background:var(--edu-bg);color:#1a1a1a;min-height:100vh;font-family:Segoe UI,Tahoma,Arial,sans-serif}.et-edu-top{background:var(--edu-header);color:#fff;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:10px 16px;display:flex;box-shadow:0 2px 6px #0000002e}.et-edu-body{grid-template-columns:1fr 240px;gap:12px;max-width:1200px;margin:0 auto;padding:12px;display:grid}@media (max-width:860px){.et-edu-body{grid-template-columns:1fr}}.et-edu-card{background:#fff;border:1px solid #c5cae9;border-radius:6px;padding:16px;box-shadow:0 1px 3px #0d47a114}.et-edu-side{background:#fff;border:1px solid #c5cae9;border-radius:6px;padding:12px}.et-edu-opt-key{color:#1565c0;flex-shrink:0;min-width:1.65rem;margin-right:2px;font-weight:700}.et-edu-opt{cursor:pointer;background:#fafcff;border:1px solid #90caf9;border-radius:6px;align-items:flex-start;gap:10px;margin-bottom:8px;padding:10px 12px;display:flex}.et-edu-opt[data-selected="1"]{background:#e3f2fd;border-color:#1565c0;box-shadow:inset 0 0 0 1px #1565c0}.et-edu-actions{flex-wrap:wrap;gap:8px;margin-top:16px;display:flex}.et-edu-btn{cursor:pointer;border:none;border-radius:4px;padding:8px 14px;font-size:13px;font-weight:600}.et-edu-btn-primary{color:#fff;background:#1565c0}.et-edu-btn-secondary{color:#263238;background:#eceff1}.et-edu-btn-mark{color:#fff;background:#ff8f00}.et-edu-btn-submit{color:#fff;background:#2e7d32}.et-edu-grid{grid-template-columns:repeat(5,1fr);gap:6px;display:grid}.et-edu-qbtn{cursor:pointer;color:#fff;border:1px solid #90a4ae;border-radius:4px;height:34px;font-weight:700}