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

html, body{height:100%;}

img {max-width: 100%;}

a{text-decoration: none;}

.row {
    display: flex;
  }
  
  .y-center {
    align-items: center;
  }
  
  .x-center {
    justify-content: center;
  }
  
  .split {
    justify-content: space-between;
  }