.grammar-error{background:#fef2f2;color:#dc2626;padding:1px 4px;border-radius:4px;font-weight:500;text-decoration:line-through;text-decoration-color:#fca5a5}.grammar-fix{background:#f0fdf4;color:#16a34a;padding:1px 4px;border-radius:4px;font-weight:500}.tone-meter-fill{transition:stroke-dashoffset 1.5s ease-out}#scroll-progress{will-change:width}.grammar-demo-audio{border-radius:1rem;padding:.85rem;background:#f8fafc;border:1px solid #e2e8f0}.grammar-demo-audio.product-frame-audio--after{background:#ecfdf5;border-color:#a7f3d0}