body {
  max-width: 60em;
  margin: 0 auto;
  padding: 1em;
}
div.lightbox {
  width: 100%;
  text-align: center;
}
html,
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: montserrat, sans-serif;
  margin-block-end: 0.9em;
}

header.container, main.container {
  padding: 0;
}

div.grid>div {
  padding: 1em;
  margin-top: .5em;
  margin-left: -.5em;
  border-radius: .5em;
}