.title {
  width: 100%;
  max-width: 900px;
  display: flex;
  padding-top: 0.5em;
}
.title img {
  height: 4em;
}

body {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.main section {
  max-width: 900px;
  padding: 1em;
  padding-top: 1em;
}

.main section:nth-child(odd) {
  background-color: whitesmoke;
}
.main {
  flex-grow: 1;
}

html {
  height: 100%;
}

footer {
  padding: 1em;
}