.bt-page{max-width:640px}.bt-tally{font-size:12px;color:var(--mute);margin-bottom:16px}.bt-card{background:var(--sheet);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:0 8px 24px #0000000d;margin-bottom:16px}.bt-task{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--mute);margin-bottom:8px}.bt-text{font-size:13.5px;line-height:1.65;background:#f6f7f9;border:1px solid var(--line);border-radius:10px;padding:14px;margin-bottom:16px;white-space:pre-wrap}.bt-options{display:flex;flex-direction:column;gap:8px;margin-bottom:8px}.bt-opt{text-align:left;padding:11px 14px;border:1.5px solid var(--line);border-radius:10px;background:var(--sheet);font-family:var(--display);font-weight:700;font-size:13px;transition:all .3s}.bt-opt:hover:not(:disabled){border-color:var(--clay);transform:translateY(-1px)}.bt-opt:disabled{cursor:default}.bt-opt.correct{background:#ecfdf5;border-color:#10a37f;color:#065f46}.bt-opt.wrong{background:#fef2f2;border-color:#ef4444;color:#991b1b}.bt-verdict{font-size:13px;line-height:1.6;margin:14px 0}.bt-speeds{font-size:11.5px;color:var(--mute);line-height:1.7;margin-bottom:14px}.bt-next{padding:11px 16px;border-radius:9px;border:1.5px solid var(--ink);background:var(--ink);color:var(--sheet);font-family:var(--display);font-weight:700;font-size:13px;transition:all .3s}.bt-next:hover{transform:translateY(-2px);box-shadow:0 8px 18px #14161a33}