*{box-sizing:border-box}body{color:#1f2937;margin:0;font-family:Arial,sans-serif}.app-shell{background:#f7f8fa;min-height:100vh}.app-shell__header{background:#fff;border-bottom:1px solid #d9dee7;padding:1rem 1.5rem}.app-shell__content,.auth-layout{padding:2rem}