:root { color-scheme: light; font-family: Arial, Helvetica, sans-serif; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: #f3f4f6; color: #111827; }
.probe { width: min(720px, calc(100vw - 32px)); border: 1px solid #d1d5db; background: #fff; padding: 32px; }
h1 { margin: 0 0 16px; font-size: 30px; letter-spacing: 0; }
p { margin: 0 0 24px; font-size: 18px; font-weight: 700; color: #374151; }
pre { margin: 0; padding: 16px; background: #f9fafb; border: 1px solid #e5e7eb; white-space: pre-wrap; }