/*
 * CSS Credits:
 *  the starting point http://js13kgames.com/entries/lost-in-cyberspace
 *  flicker animation taken from http://goonhub.com/secret
 *  scanlines based on https://blog.carbonfive.com/2015/01/07/vintage-terminal-effect-in-css3/
 *  noise solution based on Temani Afif https://codepen.io/t_afif/pen/RwyqLKZ
 */
body {
  margin: 0;
  background: black;
}

.terminal img[src*="blob:"],
.terminal video {
  max-width: 100%;
}

#terminal {
  height: 100vh;
}

/* glow */
.terminal {
  text-shadow: 0 0.2rem 1rem #427b46;
}

:root {
  --background: #031e11;
}

@media (min-width: 800px) {
  :root {
    --size: 1.2;
  }
}

@media (min-width: 1200px) {
  :root {
    --size: 1.5;
  }
}

/* to see yourself like in a mirror */
.self {
  transform: scale(-1, 1);
}

.flicker {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: rgba(18, 16, 16, 0.2);
  opacity: 0;
  z-index: 1000;
  pointer-events: none;
  animation: flicker 0.12s infinite;
}

@keyframes flicker {
  0% {
    opacity: 0.552;
  }

  5% {
    opacity: 0.48287;
  }

  10% {
    opacity: 0.59134;
  }

  15.0% {
    opacity: 0.79543;
  }

  20% {
    opacity: 0.75134;
  }

  25% {
    opacity: 0.1956;
  }

  30.0% {
    opacity: 0.90687;
  }

  35% {
    opacity: 0.122;
  }

  40% {
    opacity: 0.62254;
  }

  45% {
    opacity: 0.56977;
  }

  50% {
    opacity: 0.9925;
  }

  55.0% {
    opacity: 0.55487;
  }

  60.0% {
    opacity: 0.16607;
  }

  65% {
    opacity: 0.12353;
  }

  70% {
    opacity: 0.2214;
  }

  75% {
    opacity: 0.67908;
  }

  80% {
    opacity: 0.97163;
  }

  85.0% {
    opacity: 0.1275;
  }

  90% {
    opacity: 0.37186;
  }

  95% {
    opacity: 0.24475;
  }

  100% {
    opacity: 0.37221;
  }
}

.scanlines {
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: linear-gradient(to bottom,
      rgba(255, 255, 255, 0),
      rgba(255, 255, 255, 0) 50%,
      rgba(0, 0, 0, .2) 70%,
      rgba(0, 0, 0, .6));
  background-size: 100% .3rem;
  position: fixed;
  pointer-events: none;
}

.scanlines:before {
  position: absolute;
  top: 0px;
  width: 100%;
  height: 5px;
  background: #fff;
  background: linear-gradient(to bottom,
      rgba(255, 0, 0, 0) 0%,
      rgba(255, 250, 250, 1) 50%,
      rgba(255, 255, 255, 0.98) 51%,
      rgba(255, 0, 0, 0) 100%);
  /* W3C */
  opacity: .1;
}

.scanlines:after {
  box-shadow: 0 2px 6px rgba(25, 25, 25, 0.2),
    inset 0 1px rgba(50, 50, 50, 0.1),
    inset 0 3px rgba(50, 50, 50, 0.05),
    inset 0 3px 8px rgba(64, 64, 64, 0.05),
    inset 0 -5px 10px rgba(25, 25, 25, 0.1);
}

#terminal:focus-within~.scanlines:before {
  content: '';
  display: block;
  animation: vline calc(var(--time, 2) * 1s) linear infinite;
}

/*
 * MS Edge don't support focus-within and css vars
 * inside pseudo selector
 */
@supports (-ms-ime-align:auto) {
  .scanlines:before {
    content: '';
    animation: vline 3s linear infinite;
  }
}

@keyframes vline {
  to {
    transform: translate(0, 100vh)
  }
}

/* turn off animation */
.tv {
  height: 100vh;
  position: relative;
}

.tv.collapse {
  animation: size 2s ease-out;
  animation-fill-mode: forwards;
}

.tv.collapse:before {
  content: '';
  display: block;
  height: 100%;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  background: white;
  z-index: 1;
  opacity: 0;
  animation: opacity 2s ease-out;
  animation-fill-mode: forwards;
}

@keyframes opacity {
  to {
    opacity: 1;
  }
}

@keyframes size {
  50% {
    transform: scaleX(calc(1 / var(--width)));
    opacity: 1;
  }

  98% {
    transform: scaleX(calc(1 / var(--width))) scaleY(calc(1 / var(--height)));
    opacity: 1;
  }

  100% {
    transform: scaleX(calc(1 / var(--width))) scaleY(calc(1 / var(--height)));
    opacity: 0;
  }
}

#terminal {
  padding-bottom: 36px;
}

.collection {
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 10px;
}

.noise {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  z-index: 2000;
  opacity: 0.05;
  pointer-events: none;
  background:
    repeating-radial-gradient(#000 0 0.0001%, #fff 0 0.0002%) 50% 0/2500px 2500px,
    repeating-conic-gradient(#000 0 0.0001%, #fff 0 0.0002%) 50% 50%/2500px 2500px;
  background-blend-mode: difference;
  animation: shift .2s infinite alternate;
}

@keyframes shift {
  100% {
    background-position: 50% 0, 50% 60%;
  }
}

@media (prefers-reduced-motion) {

  .noise,
  .flicker,
  .scanlines:before {
    animation: none !important;
  }
}