* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
}

.container {
  height: 100%;
  padding: 20px;
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
}

.container img {
  width: 100%;
  max-width: 600px;
}