.not-found{display:flex;align-items:center;justify-content:center;min-height:60vh;text-align:center}.not-found-content{max-width:500px;padding:var(--spacing-xl)}.not-found-code{font-size:6rem;font-weight:700;color:var(--rfc-border);line-height:1;margin:0 0 var(--spacing-md) 0}.not-found-title{font-size:1.75rem;font-weight:600;color:var(--rfc-text);margin:0 0 var(--spacing-md) 0;border:none;padding:0}.not-found-message{font-size:1.125rem;color:var(--rfc-text-secondary);margin-bottom:var(--spacing-xl);line-height:1.6}.not-found-actions{display:flex;gap:var(--spacing-md);justify-content:center;flex-wrap:wrap}.not-found-link{display:inline-flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-lg);background-color:var(--rfc-link);color:#fff;text-decoration:none;border-radius:6px;font-weight:500;font-size:.9375rem;transition:background-color .2s ease,transform .2s ease}.not-found-link:hover{background-color:var(--rfc-link-hover);transform:translateY(-1px);color:#fff;text-decoration:none}.not-found-link:visited{color:#fff}.not-found-link.secondary{background-color:transparent;color:var(--rfc-link);border:1px solid var(--rfc-border)}.not-found-link.secondary:hover{background-color:var(--rfc-sidebar-hover);color:var(--rfc-link-hover)}.not-found-link.secondary:visited{color:var(--rfc-link)}@media (max-width:600px){.not-found-code{font-size:4rem}.not-found-title{font-size:1.5rem}.not-found-message{font-size:1rem}.not-found-actions{flex-direction:column;align-items:center}.not-found-link{width:100%;justify-content:center}}