html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
  font-family: 'Arial Black', sans-serif;
  background: #111; /* fallback */
  position: relative;
}

/* The blurred purple-cyan blobs behind everything */
.background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none; /* don’t block mouse */
  z-index: -1;

  background:
    radial-gradient(circle at 20% 30%, rgba(128,0,255,0.6), transparent 60%),
    radial-gradient(circle at 80% 70%, rgba(0,255,255,0.6), transparent 60%);

  filter: blur(150px);
  opacity: 0.8;
}

.center {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  gap: 20px;
  text-align: center;
}

.rgb-text {
  font-size: 4rem;
  font-weight: bold;
  background: linear-gradient(45deg, red, orange, yellow, green, cyan, blue, violet);
  background-size: 400% 400%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: rainbow 4s linear infinite;
}

@keyframes rainbow {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 1s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.download-button {
  padding: 20px 50px;
  font-size: 1.5rem;
  border: none;
  border-radius: 12px;
  background: linear-gradient(90deg, red, orange, yellow, green, blue, indigo, violet);
  background-size: 300% 300%;
  color: white;
  cursor: pointer;
  transition: transform 0.1s linear;
  animation: rgbLoop 5s linear infinite;
  will-change: transform;
  perspective: 1000px;
  text-decoration: none;
  display: inline-block;
}

@keyframes rgbLoop {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.made-by {
  position: fixed;
  bottom: 10px;
  right: 10px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: 'Arial Black', sans-serif;
  user-select: none;
  pointer-events: none;
  text-shadow: 0 0 5px rgba(0,0,0,0.7);
  z-index: 10;
}