body {
    background-color:#000;
    margin:0;
    overflow:hidden;
    padding:0;
  }
  
  .screen {
    animation:colorPulse 5s infinite ease-in-out;
    background-image:radial-gradient(#444, #111);
    box-shadow:0 0 5vmin 1vmin #000 inset;
    box-sizing:border-box;
    font-family:'Fira Mono', monospace;
    font-size:20px;
    height:100vh;
    overflow:hidden;
    padding:10vmin;
    width:100vw;
  }
  
  .screen:before {
    animation:wave 5s infinite ease-in-out;
    content:"";
    height:20vh;
    left:0;
    opacity:.5;
    position:absolute;
    right:0;
    z-index:1;
  }
  
  .screen:after {
    background-image:linear-gradient(transparent, transparent 3px, #222);
    background-size:4px 4px;
    bottom:0;
    content:"";
    left:0;
    pointer-events:none;
    position:absolute;
    right:0;
    top:0;
    z-index:2;
  }
  
  p:last-child:after {
    animation:blink 1s infinite;
    content:"_";
  }
  
  @keyframes colorPulse {
    0%, 100% {
      color:#0c0;
    }
    48%, 52% {
      color:#090;
    }
    50% {
      color:#060;
    }
  }
  
  @keyframes wave {
    0% {
      box-shadow:0 -10vh 20vh #0c0;
      top:-100vh;
    }
    48%, 52% {
      box-shadow:0 -10vh 20vh #090;
    }
    50% {
      box-shadow:0 -10vh 20vh #060;
    }
    100% {
      box-shadow:0 -10vh 20vh #0c0;
      top:200vh;
    }
  }
  
  @keyframes blink {
    50% {
      opacity:0;
    }
  }

}
/* cyrillic-ext */
@font-face {
    font-family: 'Fira Mono';
    font-style: normal;
    font-weight: 400;
    src: url(https://fonts.gstatic.com/s/firamono/v14/N0bX2SlFPv1weGeLZDtgK_7SodY.woff2) format('woff2');
    unicode-range: U+0460-052F, U+1C80-1C88, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
  }
  /* cyrillic */
  @font-face {
    font-family: 'Fira Mono';
    font-style: normal;
    font-weight: 400;
    src: url(https://fonts.gstatic.com/s/firamono/v14/N0bX2SlFPv1weGeLZDtgIv7SodY.woff2) format('woff2');
    unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
  }
  /* greek-ext */
  @font-face {
    font-family: 'Fira Mono';
    font-style: normal;
    font-weight: 400;
    src: url(https://fonts.gstatic.com/s/firamono/v14/N0bX2SlFPv1weGeLZDtgKv7SodY.woff2) format('woff2');
    unicode-range: U+1F00-1FFF;
  }
  /* greek */
  @font-face {
    font-family: 'Fira Mono';
    font-style: normal;
    font-weight: 400;
    src: url(https://fonts.gstatic.com/s/firamono/v14/N0bX2SlFPv1weGeLZDtgJf7SodY.woff2) format('woff2');
    unicode-range: U+0370-03FF;
  }
  /* latin-ext */
  @font-face {
    font-family: 'Fira Mono';
    font-style: normal;
    font-weight: 400;
    src: url(https://fonts.gstatic.com/s/firamono/v14/N0bX2SlFPv1weGeLZDtgKP7SodY.woff2) format('woff2');
    unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
  }
  /* latin */
  @font-face {
    font-family: 'Fira Mono';
    font-style: normal;
    font-weight: 400;
    src: url(https://fonts.gstatic.com/s/firamono/v14/N0bX2SlFPv1weGeLZDtgJv7S.woff2) format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
  }