body, html {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
  color: white;
  height: 100%;
  overflow: hidden;
}

.background {
  position: fixed;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at bottom, #001f3f 0%, #0074D9 100%);
  overflow: hidden;
  z-index: -1;
}

.bubble {
  position: absolute;
  bottom: -50px;
  width: 20px;
  height: 20px;
  background-color: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  animation: rise 10s infinite ease-in;
}

@keyframes rise {
  0% {
    transform: translateY(0) scale(1);
    opacity: 0.6;
  }
  100% {
    transform: translateY(-120vh) scale(0.8);
    opacity: 0;
  }
}

@keyframes flow {
  0% { background-position: 0 0; }
  100% { background-position: 0 -20px; }
}

.light-rays {
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: repeating-linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.05),
    rgba(255, 255, 255, 0.05) 2px,
    transparent 2px,
    transparent 6px
  );
  mix-blend-mode: overlay;
  animation: lightMove 8s ease-in-out infinite alternate;
  z-index: 0;
}

@keyframes lightMove {
  0% {
    transform: translateY(0px) rotate(0deg);
  }
  100% {
    transform: translateY(-30px) rotate(1deg);
  }
}

.nav-button {
  position: absolute;
  top: 20px;
  left: 20px;
  background-color: rgba(0, 188, 212, 0.8);
  color: white;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  z-index: 10;
  transition: background-color 0.3s ease;
}

.nav-button:hover {
  background-color: rgba(0, 188, 212, 1);
}


.container {
  text-align: center;
  padding: 40px;
}

button {
  background-color: #00bcd4;
  border: none;
  padding: 10px 20px;
  font-size: 16px;
  border-radius: 5px;
  cursor: pointer;
  color: white;
}

#log {
  margin-top: 40px;
  max-height: 200px;
  overflow-y: auto;
  text-align: left;
}