body {
  margin: 0;
  padding: 0;
  background-color: black;
  color: white;
  font-family: sans-serif;
  overflow: hidden;
}

.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  width: 90%;
}

a {
  color: white;
  text-decoration: none;
}

pre {
  font-weight: bold;
  font-size: 16px;
  user-select: none;
  color: purple;
  background: repeating-linear-gradient(
    120deg,
    #3399FF 0%,
    #DB7093 40%,
    #3399FF 60%
  );
  background-size: 60vw 60vw;
  -webkit-text-fill-color: transparent;
  -webkit-background-clip: text;
  animation: slide 5s linear infinite forwards;
}

@keyframes slide {
  0% { background-position-x: 0%; }
  100% { background-position-x: 60vw; }
}

/* Audio glow effect */
#audio-glow {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  pointer-events: none;
  z-index: -1;
  background: radial-gradient(circle, rgba(0,191,253,0.4) 0%, rgba(143,0,255,0) 70%);
  opacity: 0;
  transform: scale(1.5);
  transition: opacity 0.1s ease, transform 0.1s ease;
}

#start-button {
  font-size: 14px; /* Adjust as necessary */
  padding: 10px 20px;
  color: white;
  background-color: black;
  border: 1px solid #3399FF;
  border-radius: 5px; /* Smooth corners */
  cursor: pointer;
  position: relative;
  z-index: 9999;
  transform: scale(1); /* Ensure it's not too small */
  transition: transform 0.3s ease, background-color 0.3s ease;
}

#start-button:hover {
  background-color: #333; /* Darken on hover */
  transform: scale(1.05); /* Slight scale-up effect */
}

.start-button:focus {
  outline: none;
}

.start-button span {
  color: #DB7093;
  font-size: 16px;
}

/* Button disappearance */
.start-button.disappear {
  animation: fadeOut 0.3s forwards;
}

@keyframes fadeOut {
  to {
    opacity: 0;
    pointer-events: none;
  }
}

/* Mobile */
@media (max-width: 600px) {
  pre {
    font-size: 14px;
  }

  .start-button {
    padding: 10px 18px;
    font-size: 14px;
    border-radius: 20px;
  }
}