:root {
  color-scheme: dark;
  background: #030303;
  font-family: Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body,
.frame,
#static-canvas {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background: #030303;
}

.frame {
  position: relative;
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.12), transparent 52%),
    #030303;
}

#static-canvas {
  position: absolute;
  inset: 0;
  image-rendering: pixelated;
  filter: contrast(1.26) brightness(1.07) saturate(0);
}

.scanlines,
.phosphor,
.vignette,
.sync-roll {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.scanlines {
  opacity: 0.2;
  mix-blend-mode: multiply;
  background-image:
    repeating-linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.72),
      rgba(0, 0, 0, 0.72) 1px,
      transparent 1px,
      transparent 4px
    );
}

.phosphor {
  opacity: 0.18;
  mix-blend-mode: screen;
  background:
    repeating-linear-gradient(90deg, rgba(255, 42, 42, 0.42) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, transparent 0 2px, rgba(70, 255, 109, 0.34) 2px 3px, transparent 3px 5px),
    repeating-linear-gradient(90deg, transparent 0 4px, rgba(76, 150, 255, 0.32) 4px 5px, transparent 5px 7px);
}

.vignette {
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.42), transparent 18%, transparent 82%, rgba(0, 0, 0, 0.42)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent 8%, transparent 88%, rgba(0, 0, 0, 0.38)),
    radial-gradient(circle at center, transparent 42%, rgba(0, 0, 0, 0.52) 100%);
}

.sync-roll {
  opacity: 0.52;
  mix-blend-mode: screen;
  background:
    linear-gradient(
      180deg,
      transparent 0%,
      transparent 38%,
      rgba(255, 255, 255, 0.28) 43%,
      rgba(0, 0, 0, 0.44) 45%,
      transparent 50%,
      transparent 100%
    );
  background-size: 100% 160%;
  animation: roll 7.5s linear infinite;
}

.channel-id {
  position: absolute;
  right: 28px;
  bottom: 24px;
  min-width: 164px;
  padding: 8px 11px;
  text-align: center;
  color: rgba(255, 255, 255, 0.72);
  background: rgba(0, 0, 0, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.28);
  font-size: 16px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0;
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.28);
  animation: label-flicker 5.2s steps(1, end) infinite;
}

@keyframes roll {
  from {
    transform: translateY(-64%);
  }

  to {
    transform: translateY(64%);
  }
}

@keyframes label-flicker {
  0%,
  84%,
  100% {
    opacity: 0.72;
  }

  85%,
  86%,
  91% {
    opacity: 0.16;
  }

  87%,
  90% {
    opacity: 0.86;
  }
}

@media (max-width: 760px) {
  .channel-id {
    right: 14px;
    bottom: 14px;
    min-width: 132px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sync-roll,
  .channel-id {
    animation: none;
  }

  .sync-roll {
    opacity: 0.34;
    transform: translateY(0);
  }
}