body {
    background-color: #D6D6D6;

    background-image:
        linear-gradient(#B8B8B8 1px, transparent 1px),
        linear-gradient(90deg, #B8B8B8 1px, transparent 1px);

    background-size: 25px 25px;
}

.error h1 {
  padding: 15px 0; 
  
}