@property --blink-opacity {
  syntax: "<number>";
  inherits: false;
  initial-value: 1;
}

@keyframes blink-animation {
  0%,
  100% {
    opacity: var(--blink-opacity, 1);
  }
  50% {
    opacity: 0;
  }
}

:root {
  --stripe-color: #fff;
  --bg: var(--stripe-color);
  --maincolor: var(--bg);
}

@keyframes smoothBg {
  from {
    background-position: 50% 50%, 50% 50%;
  }
  to {
    background-position: 350% 50%, 350% 50%;
  }
}

.wrapper {
  width: 100%;
  height: auto;
  position: relative;
}

.rainbow {
  width: 100%;
  height: 100%;
  min-height: 100vh;
  position: relative;
  display: flex;
  place-content: center;
  place-items: center;
  --stripes: repeating-linear-gradient(
    100deg,
    var(--stripe-color) 0%,
    var(--stripe-color) 7%,
    transparent 10%,
    transparent 12%,
    var(--stripe-color) 16%
  );

  --rainbow: repeating-linear-gradient(
    100deg,
    #60a5fa 10%,
    #e879f9 15%,
    #60a5fa 20%,
    #5eead4 25%,
    #60a5fa 30%
  );
  background-image: var(--stripes), var(--rainbow);
  background-size: 300%, 200%;
  background-position: 50% 50%, 50% 50%;

  filter: blur(10px) invert(100%);

  mask-image: radial-gradient(ellipse at 100% 0%, black 40%, transparent 70%);
  &::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: var(--stripes), var(--rainbow);
    background-size: 200%, 100%;
    animation: smoothBg 60s linear infinite;
    background-attachment: fixed;
    mix-blend-mode: difference;
  }
  opacity: 40%;
}

:has(:checked) {
  --stripe-color: #000;
}
:has(:checked) .rainbow,
:has(:checked) .rainbow::after {
  filter: blur(10px) opacity(50%) saturate(200%);
}

.content {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-flow: column;
  gap: 4.5%;
  padding: 20px;
}

@media (max-width: 600px) {
  .rainbow {
    background-image: none;
    mask-image: none;
    &::after {
      background-image: none;
    }
  }
}