.btn{font-family:var(--font-ui);border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;transition:background var(--motion-focus), color var(--motion-focus), border-color var(--motion-focus), filter var(--motion-focus);border:1.5px solid #0000;justify-content:center;align-items:center;font-weight:500;display:inline-flex}.btn:disabled{opacity:.4;cursor:not-allowed}.btn--primary{background:var(--accent-copper);color:var(--bg-base);border-color:#0000}.btn--primary:hover:not(:disabled){filter:brightness(.92)}.btn--primary:active:not(:disabled){filter:brightness(.84)}.btn--outlined{color:var(--accent-copper);border-color:var(--accent-copper);background:0 0}.btn--outlined:hover:not(:disabled){background:var(--bg-elevated)}.btn--outlined:active:not(:disabled){background:var(--bg-surface)}.btn--ghost{color:var(--text-secondary);background:0 0;border-color:#0000}.btn--ghost:hover:not(:disabled){color:var(--text-primary);background:var(--bg-elevated)}.btn--ghost:active:not(:disabled){background:var(--bg-surface)}.btn--sm{font-size:var(--text-label-size);line-height:var(--text-label-line);padding:6px 12px}.btn--md{font-size:var(--text-caption-size);line-height:var(--text-caption-line);padding:8px 16px}.btn--lg{font-size:var(--text-body-size);line-height:var(--text-body-line);padding:12px 24px}@keyframes retry-pulse{0%,to{box-shadow:0 0 #c8794100}50%{box-shadow:0 0 0 6px #c8794138}}.error-shell{width:100%;min-height:400px;padding:var(--gutter-tv);justify-content:center;align-items:center;gap:var(--space-4);background:var(--bg-base);color:var(--text-primary);text-align:center;outline-offset:-1px;outline:1px solid #c879411f;flex-direction:column;display:flex}.error-shell__icon{color:var(--accent-copper);flex-shrink:0;font-size:64px;line-height:1;display:block}.error-shell__title{font-size:var(--text-title-size);line-height:var(--text-title-line);font-weight:var(--text-title-weight);color:var(--text-primary);max-width:560px;margin:0}.error-shell__subtext{font-size:var(--text-body-size);line-height:var(--text-body-line);color:var(--text-secondary);max-width:480px;margin:0}.error-shell__actions{gap:var(--space-4);margin-top:var(--space-4);justify-content:center;align-items:center;display:flex}.error-shell__report{margin-top:var(--space-2);font-size:var(--text-caption-size)!important;color:var(--text-secondary)!important}.error-shell__actions .btn--outlined{animation:2.4s ease-in-out infinite retry-pulse}@media (prefers-reduced-motion:reduce){.error-shell__actions .btn--outlined{animation:none}}@keyframes skeleton-shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.skeleton{background:linear-gradient(90deg, var(--bg-elevated) 25%, #c8794112 50%, var(--bg-elevated) 75%);border-radius:var(--radius-sm);animation:skeleton-shimmer var(--motion-shimmer,2s) linear infinite;background-size:200% 100%}@media (prefers-reduced-motion:reduce){.skeleton{background:var(--bg-elevated);opacity:.7;animation:none}}