/* Floating Bubble — single large bubble drifting in soft light */
:root {
  --bg-0: #0d1730;
  --bg-1: #1a2750;
  --bg-2: #2a3a78;
  --ink:  #eaf3ff;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; height: 100%; overflow: hidden;
  background:
    radial-gradient(120% 90% at 30% 20%, var(--bg-2) 0%, var(--bg-1) 40%, var(--bg-0) 90%);
  color: var(--ink);
  font-family: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  cursor: crosshair;
}
#bubble { position: fixed; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; }
.hint {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  display: inline-flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 12px 22px; border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.10);
  color: rgba(234, 243, 255, 0.7);
  font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase;
  pointer-events: none; user-select: none;
  transition: opacity 1.6s ease 1.2s;
}
.hint.hidden { opacity: 0; }
.dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #b9d8ff;
  box-shadow: 0 0 12px rgba(185, 216, 255, 0.9);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.45; transform: scale(0.85); }
  50%      { opacity: 1;    transform: scale(1.15); }
}