.user-avatar{border:2px solid rgba(245,158,11,.3);transition:border-color .2s}.user-avatar:hover{border-color:#f59e0b99}.avatar-sm{width:1.5rem;height:1.5rem}.avatar-md{width:2rem;height:2rem}.avatar-lg{width:2.5rem;height:2.5rem}.avatar-fallback{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;font-weight:600}.fallback-sm{font-size:.625rem}.fallback-md{font-size:.75rem}.fallback-lg{font-size:.875rem}