.runtime-loading{display:grid;gap:8px;padding:12px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface);font-size:.85rem;min-width:0}
.runtime-loading[hidden]{display:none}
.runtime-loading progress{width:100%;height:10px;accent-color:var(--cyan)}
.runtime-loading small{color:var(--muted);overflow-wrap:anywhere}
.runtime-loading[data-state=failed] progress{accent-color:#fa7373}
.runtime-loading[data-state=ready]{opacity:.8}
.runtime-preview-pane:has(.runtime-loading:not([hidden])){grid-template-rows:auto minmax(0,1fr) auto}