body {
    background-color: #F8F9FA;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  flex-direction: column;
  font-family: Arial, sans-serif;
}

header, footer {
  padding: 10px;
  background: #333;
  color: white;
  flex: 0 0 auto;
}

.content {
  flex: 1 1 auto;
  overflow: auto;
}