body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}.app-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 1.5rem;border-bottom:1px solid #d4d4d8}.app-title{font-weight:600}.app-main{max-width:72rem;margin:0 auto;padding:1.5rem}