html, body {
  position: relative;
  height: 100%;
}

.content {
  width: 80%;
  margin: 0 auto;
  position: relative;
  top: 35%;
  transform: translateY(-50%);
  background-color: #e7e7e7;
  box-shadow: 0 0 4px 1px #b7b7b7;
  padding: 15px;
}

.content p:first-child {
  margin-top: 0;
}

.content p:last-child {
  margin-bottom: 0;
}