style.css

body {
    background-image: url("https://i.ibb.co/YTN069M/tetris.jpg");
    padding-top: 1em;
    text-align: center;
    background-size: cover;
  }
  
  h2,
  h3,
  h4 {
    font-family: "Press Start 2P", monospace;
    color: white;
  }
  p {
    font-family: "Press Start 2P", monospace;
    line-height: 1.5;
    color: white;
    font-size: 15px;
  }
  
  #tetris {
    border: solid 0.2em white;
    background-color: black;
  }
  #score {
    font-family: "Press Start 2P", monospace;
    color: white;
  }
  
  #start {
    background-color: blue;
    color: white;
    padding: 0.5em;
    margin: 0px 0px 25px 0px;
    font-family: "Press Start 2P", monospace;
  }
  
  #reset {
    background-color: red;
    color: white;
    padding: 0.5em;
    margin: 0px 0px 25px 0px;
    font-family: "Press Start 2P", monospace;
  }
  
  #instructions {
    background-color: purple;
    color: white;
    padding: 0.5em;
    margin: 0px 0px 25px 0px;
    font-family: "Press Start 2P", monospace;
  }
  /* The Modal (background) */
  .modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    padding-top: 100px; /* Location of the box */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: white; /* Fallback color */
    background-color: rgba(0, 0, 0, 0.4); /* Black w/ opacity */
  }
  
  /* Modal Content */
  .modal-content {
    background-color: black;
    margin: auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
  }
  
  /* The Close Button */
  .close {
    color: #aaaaaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
  }
  
  .close:hover,
  .close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
  }