@import url("https://cdnjs.cloudflare.com/ajax/libs/meyer-reset/2.0/reset.min.css");

body{
    margin: 0;
    color: #fff;
  } 
  .wrapper{
    min-height: 100vh;
    background: #ccc;
    display: flex;
    flex-direction: column;
  }
  .header{
    height: 50px;
    background: #666;
  }
  .content {
    flex: 1;
    background: #999;
}