html {
  box-sizing: border-box;
  font-family: arial, helvetica, sans-serif;
}
img {
  max-width: 100%;
}
*,
*:before,
*:after {
  box-sizing: inherit;
}
.container {
  margin: 30px;
}
.container > * {
  border: 1px solid #000;
  padding: 10px;
}
.header {
  background-color: #566246;
  color: #d8dad3;
}
.navigation {
  background-color: #d8dad3;
  color: #4a4a48;
}
.links {
  background-color: #a4c2a5;
  color: #4a4a48;
}
.ads {
  background-color: #f1f2eb;
  color: #4a4a48;
}
.footer {
  background-color: #4a4a48;
  color: #f1f2eb;
}