* {     box-sizing: border-box;   }   body {     margin: 0;   }   * {     box-sizing: border-box;   }   body {     margin-top: 0px;     margin-right: 0px;     margin-bottom: 0px;     margin-left: 0px;   }   section {     min-height: 40px;   }   div.container {     min-height: 40px;   }