* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: #f5f5f5; padding: 20px 0; font-family: Arial, Helvetica, sans-serif; }
body > table { margin: 0 auto; }
body > h2 { text-align: center; }
img { max-width: 100%; height: auto; }
table { border-collapse: collapse; }