:root{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color-scheme:dark}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:radial-gradient(circle at 10% 20%,#1f2937,#0f172a 45%,#020617);color:#e2e8f0}.app-shell{min-height:100vh;padding:16px}.app-header{margin:0 auto 16px;max-width:1480px;padding:12px 16px;border:1px solid #334155;border-radius:12px;background:#0f172ab3;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.app-header h1{margin:0;font-size:1.375rem}.app-header p{margin:4px 0 0;color:#94a3b8;font-size:.875rem}