html,
body {
  height: 100%;
  margin: 0;
}

body {
  background: #f2f2f2;
  font-family: Arial, Helvetica, sans-serif;
}

main {
  box-sizing: border-box;
  height: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 16px;
}

/* Dentro do iframe (embed.js): ocupa tudo, sem margens */
body.embed {
  background: #ffffff;
}

body.embed main {
  max-width: none;
  padding: 0;
}

@media (max-width: 600px) {
  main {
    padding: 0;
  }
}