*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a0e27;
}

#ocean {
  width: 100vw;
  height: 100vh;
  background: linear-gradient(180deg, #1a1a4e 0%, #0f1535 40%, #0a0e27 100%);
  position: relative;
  overflow: hidden;
}

#shark {
  position: fixed;
  font-family: "Courier New", Courier, monospace;
  font-size: 14px;
  line-height: 1.15;
  white-space: pre;
  z-index: 10;
  pointer-events: none;
  will-change: transform;
  text-shadow: 0 0 6px rgba(90, 122, 154, 0.3);
}

#shark .body {
  color: #4a6d8c;
  text-shadow: 0 0 2px rgba(74, 109, 140, 0.3);
}

#shark .spot {
  color: #c0dff0;
  text-shadow: 0 0 3px rgba(192, 223, 240, 0.4);
}

#shark .eye {
  color: #1a1a2e;
  text-shadow: 0 0 4px rgba(200, 220, 255, 0.7);
}

#shark .gills {
  color: #3a5570;
  text-shadow: 0 0 2px rgba(58, 85, 112, 0.3);
}

/* Bubbles */
#bubbles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.bubble {
  position: absolute;
  bottom: -20px;
  font-size: 14px;
  color: rgba(150, 200, 255, 0.15);
  animation: rise linear infinite;
  pointer-events: none;
}

@keyframes rise {
  0% {
    transform: translateY(0) translateX(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-105vh) translateX(30px);
    opacity: 0;
  }
}

/* Vignette overlay */
#vignette {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 20;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(5, 5, 20, 0.5) 100%);
}