:root{--bg:#f7f8fa;--accent:#2563eb;--text:#111827}
body{font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);margin:0;padding:0}
header{background:white;border-bottom:1px solid #e6e7ea;padding:1rem}
main{padding:1.5rem}
footer{padding:1rem;text-align:center;color:#6b7280}
h1{margin:0;font-size:1.25rem}