h1 {
  color: green;
  font-size: 50px;
}

h2{
  color: green;
  font-size: 25px;
}

body {
  font-family: Arial, sans-serif;
  background-image: url(taustakuva.jpg);
  background-attachment: fixed;
  background-size: cover;
  background-position: center center;
}

img {
  max-width: 100%;
  height: auto;
}

.kokosivu{
   max-width: 800px;
   background-color: #fff; 
   margin-left: auto;
   margin-right: auto;
   padding: 15px;
   
}

.erityinen{
   border: 3px;
}