:root{--bg: #ffffff;--fg: #111827}html,body,#root{height:100%}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;background:var(--bg);color:var(--fg)}.app-header{display:flex;gap:1rem;align-items:center;padding:1rem 1.5rem;border-bottom:1px solid #e5e7eb}.app-root main{padding:1.5rem}