/* Background */
body {
  color: white;

  font-family: 'Consolas', 'Courier New', monospace;

  background-color: #000000;
  background-image: url('https://i.pinimg.com/originals/5f/9f/bd/5f9fbdbe038edf4a09fdb52c94ad59bf.jpg');

  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  background-attachment: fixed;
}

body:before {
  content: '';
  position: absolute;
  background: rgba(0, 0, 0, 0.75);

  top: 0;
  left: 0;
  width: 100%;
  height: 100%;

  z-index: -1;
}

/* Text */
.tobeadded {
  color: white;
  font-size: calc(10px + 1vmin);
  font-family: 'Consolas', 'Courier New', monospace;

  /* With absolute position, put everything in the center of the page. */
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);

  /* Surround the text with a black box. */
  padding: 40px;
  background-color: black;
  border: 1px solid white;
  border-radius: 10px;

  /* Add shadows to the bottom */
  box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.5);

  /* Make the box responsive */
  width: 100%;
  max-width: 500px;

  animation: appear 1s linear forwards;
}

.blinking-underscore {
  animation-name: blink;
  animation-duration: 1s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}