body {
  font-family: Helvetica, Arial, 'sans-serif';
  font-size: 100%;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-items: stretch;
}

h1 {
  text-align: center;
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

img {
  max-width: 100%;
}

.text-center {
  text-align: center;
}

@media screen and (min-width: 600px) {

  .graph-container .grid {
    display: grid;
    grid-column-gap: 1em;
    grid-row-gap: 1em;
    grid-template-columns: 1fr 1fr 1fr;
  }

  .graph-container .grid div {
    text-align: center;
  }

}

.admin-links {
  text-align: center;
  margin: 1rem 0;
}

.admin-links a {
  color: #0072ff;
  display: inline-block;
  padding: 0.4rem 0.2rem;
}

footer {
  margin-top: auto;
  text-align: center;
}

footer span {
  opacity: 0;
  pointer-events: none;
}

.mailqueue pre {
  white-space: pre-wrap;
}