:root{--v2-bg:#fff;--v2-bg-muted:#f8f9fa;--v2-text:#1a1a2e;--v2-text-muted:#6b7280;--v2-accent:#3b82f6;--v2-accent-light:#eff6ff;--v2-green:#22c55e;--v2-green-light:#f0fdf4;--v2-orange:#f59e0b;--v2-orange-light:#fffbeb;--v2-red:#ef4444;--v2-red-light:#fef2f2;--v2-border:#e5e7eb;--v2-shadow:0 1px 3px #00000014, 0 4px 12px #0000000a}iframe{border:none;outline:none}.v2-blank{border:none;border-bottom:2px dashed var(--v2-accent);text-align:center;background:0 0;border-radius:0;outline:none;padding:2px 6px;font-family:inherit;transition:border-color .2s,background-color .2s}.v2-blank:focus{border-bottom-style:solid;border-color:var(--v2-accent);background:var(--v2-accent-light)}.v2-blank.correct{border-color:var(--v2-green);background:var(--v2-green-light);border-bottom-style:solid}.v2-blank.wrong{border-color:var(--v2-red);background:var(--v2-red-light);border-bottom-style:solid}@keyframes v2-fade-up{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.v2-fade-up{animation:.3s ease-out both v2-fade-up}