body { font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; margin:24px; }
table { border-collapse: collapse; width:100%; }
th, td { border-bottom: 1px solid #eee; padding: 8px 6px; text-align:left; }
.btn { display:inline-block; padding:8px 12px; border:1px solid #ccc; border-radius:8px; text-decoration:none; background:#fff; cursor:pointer; }