#css

The inset keyword on box-shadow is effectively ignored in s&box Razor panels: an inner vignette renders as an outer halo, and a full-screen inset vignette renders nothing at all. Build inner glows and vignettes from linear-gradient bands instead.

A child-combinator rule targeting the universal selector (`.parent > *`) is silently dead in s&box razor SCSS: no error, no warning, the rule simply never applies.

CSS @keyframes plus the animation: shorthand are supported in s&box razor SCSS, so a spinner or looping effect is pure CSS -- do not drive it from a per-frame BuildHash re-render.

A flex-grow slider track holding a normal-flow fill child sized by width:N% balloons wider as the value increases: take the fill out of flow with position:absolute, and make sure the track carries no overflow:hidden.

s&box blends UI alpha in linear color space while browser-authored mockups blend in sRGB, so every low-alpha white/light surface renders substantially lighter in-engine than the same rgba() value looks in a browser. Opaque colors match bit-for-bit: the divergence is isolated to the alpha compositing step and worst at low alpha. Match target rendered pixels, never authored alpha numbers.

The engine SliderControl renders its thumb position as a raw float in a CSS style attribute: near-min values with snap residue produce scientific notation (4.9E-06%), causing a style parse error.

An undefined SCSS variable in a .razor.scss fails at runtime with only a console warning (no compile error, no toast) and the affected panels can render fully invisible. A trailing // comment on a value line fails the same way.