* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
  }

/* body */
  body {
    height: 100%;
    margin: 0;
    overflow: hidden;
    background: linear-gradient(to bottom, #202020, #111119);
  }

  /* container */
  .container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    
  }
  
  h1 {
    font-size: 5rem;
    margin-bottom: 0.5em;
    color: gold;
    -webkit-animation:colorchange 10s infinite alternate;
  }
  
  h2 {
    margin-top: 1em;
    font-size: 2rem;
    color: #818d1a;
    margin-bottom: 0.5em;
  }
  
  .play-area {
    display: grid;
    width: 300px;
    height: 300px;
    grid-template-columns: auto auto auto;
  }
  
  .block {
    display: flex;
    width: 100px;
    height: 100px;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: bold;
    border: 3px solid rgb(0, 0, 0);
    transition: background 0.2s ease-in-out;
    -webkit-animation:colorchange 10s infinite alternate;
    border-radius: 10px;
    color: blanchedalmond;
    
  }
  
  .block:hover {
    cursor: pointer;
    background: #e6e08e;
    
  }
  
  .occupied:hover {
    background: #8a8a8a80;
  }
  
  .win {
    background: #08ff0850;
  }
  
  .win:hover {
    background: #0ff30f;
  }
  
  #b_0,#b_1,#b_2 {
    border-top: none;
  }
  
  #b_0,#b_3,#b_6 {
    border-left: none;
  }
  
  #b_6,#b_7,#b_8 {
    border-bottom: none;
  }
  
  #b_2,#b_5,#b_8 {
    border-right: none;
  }
  

  button {
    outline: none;
    border: 4px solid rgba(255, 238, 0, 0.966);
    padding: 10px 20px;
    font-size: 1rem;
    font-weight: bold;
    background: none;
    transition: all 0.2s ease-in-out;
    border-radius: 25px;
    color: white;
    
  }
  
  button:hover {
    cursor: pointer;
    color: black;
    background: rgb(238, 255, 0);
    transform: scaleX(1.2);
    
  }
  
  .playerWin {
    color: rgb(0, 255, 0);
    
  }
  
  .computerWin {
    color: red;
    
  }
  
  .draw {
    color: rgb(255, 230, 0);
    
  }
  
  @media only screen and (max-width: 600px) {
  
    h1 {
      font-size: 3rem;
      margin-bottom: 0.5em;
    }
  
    h2 {
      margin-top: 1em;
      font-size: 1.3rem;
    }
  }

  .line-1{
    position: relative;
    top: 50%;  
    width: 24em;
    margin: 0 auto;
    border-right: 2px solid rgba(255,255,255,.75);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    transform: translateY(-50%);   
    
}

/* Animation */
.anim-typewriter{
  animation: typewriter 4s steps(44) 1s 1 normal both,
             blinkTextCursor 500ms steps(44) infinite normal;
}
@keyframes typewriter{
  from{width: 0;}
  to{width: 8em;}
}
@keyframes blinkTextCursor{
  from{border-right-color: rgba(255,255,255,.75);}
  to{border-right-color: transparent;}
}


@-webkit-keyframes colorchange {
    0% {
      border-color: gold;
      
      
    }
    
    10% {
      
        border-color: rgb(208, 255, 0);
        
    }
    
    20% {
      
        border-color: rgb(166, 255, 0);
        
    }
    
    30% {
      
        border-color: rgb(21, 255, 0);
        
    }
    
    40% {
      
        border-color: rgb(0, 255, 191);
        
    }
    
    50% {
      
        border-color: rgb(0, 247, 255);
        
    }
    
    60% {
      
        border-color: rgb(0, 225, 255);
        
    }
    
    70% {
      
        border-color: rgb(0, 26, 255);
        
    }
    80% {
   
        border-color: rgb(119, 0, 255);
        
    }
    
    90% {
   
        border-color: rgb(204, 0, 255);
    }
    
    100% {
      
        border-color: rgb(255, 0, 157);
        
    }
  }