* {
   margin: 0;
   padding: 0;
   box-sizing: border-box;
}
body {
    font-family: Arial, Helvetica, sans-serif;    
    background-color: #f1f1f1;
}
header {
    text-align: center;
    background-color: #333;
    color: #fff;
    padding: 50px;
}
header h1 {
    font-size: 48px;
    margin-bottom: 30px;
}
header p {
    font-size: 22px;
}
main {
    width: 90vw;
    margin: 0 auto;
    padding: 30px 20px;
}
article {
    background-color: #fff;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 5px;
  }
  article:last-child {
    margin-bottom: 0;
  }
  article h3 {
    margin: 10px 0 25px 0;
  }
  article p {
    margin-top: 16px;
    line-height: 24px;
  }
  footer {
    text-align: center;
    background-color: #333;
    color: #fff;
    padding: 20px;
    position: absolute;
    bottom: 0;
    width: 100%;
    /* position: fixed;
    z-index: 1; */
  }
  
  @media(max-width:768px) {
    header { padding: 30px 20px; }
    header h1 { font-size: 36px; margin-bottom: 22px; }
    header p { font-size: 18px; }
    main { width: 100vw; padding: 20px; }
    article { margin-bottom: 16px; font-size: 14px; }
    article h3 { margin: 10px 0 20px 0; }
    article p { margin-top: 16px; line-height: 20px; }
  }

  .splash{
    cursor : pointer;
    position : fixed;
    top : 50%;
    left : 50%;
    height : 100%;
    width : 100%;
    transform : translate(-50%,-50%);    
    background-color: rgba(0,0,0);
    transition : all ease-in-out 600ms;
  }
  .hidden{
    transition : 0.5s;
    display : none;
  }
  .splash-header {
    height : 90%;
    color : white;
    font-family : consolas;
    font-size : 30px;
    display : flex;
    justify-content: center;
    align-items : center;
  }
  
  body {
    background-color: rgba(200,200,170);
  }
  
  .btn {
  /*   border : none; */
  /*   padding : 10px; */
  /*   position : fixed; */
    z-index : -1;
    left : 50%;
    transform : translateX(-50%);
  }