body { font-family: "Segoe UI", sans-serif; margin: 40px; }
table { border-collapse: collapse; margin: 1em 0; }
th, td { border: 1px solid #ccc; padding: 6px 10px; }
th { background: #f2f2f2; }

@media (min-resolution: 2dppx) {
  body {
    background-image:
      linear-gradient(to right, rgba(0,0,0,0.2) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(0,0,0,0.2) 1px, transparent 1px);
  }
}