.three-column-thread-shell{display:grid;grid-template-columns:300px 1fr 52px;height:calc(100vh - 3.5rem);max-height:calc(100dvh - 3.5rem);overflow:hidden;background:var(--color-bg, var(--background, #f8fafc));font-family:var(--font-body, ui-sans-serif, system-ui, sans-serif)}.three-column-thread-shell__sidebar,.three-column-thread-shell__main,.three-column-thread-shell__rail{min-width:0;overflow:hidden}