*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #fff;
}

header,
main,
footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
}

img {
  max-width: 100%;
  height: auto;
}