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

:root {
  --bg: #04040f;
  --accent-a: #7c3aed;
  --accent-b: #2563eb;
  --accent-c: #db2777;
  --accent-d: #059669;
  --text: rgba(255, 255, 255, 0.85);
  --text-dim: rgba(255, 255, 255, 0.25);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
}

#scene {
  position: fixed;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
}

#ui {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

#wordmark {
  font-size: clamp(2.5rem, 8vw, 6rem);
  font-weight: 900;
  letter-spacing: 0.25em;
  color: var(--text);
  text-transform: uppercase;
  background: linear-gradient(135deg, #e0d7ff 0%, #a78bfa 40%, #818cf8 70%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  mix-blend-mode: screen;
  user-select: none;
  filter: drop-shadow(0 0 40px rgba(124, 58, 237, 0.4));
}

#hint {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-dim);
  user-select: none;
  animation: pulse-hint 3s ease-in-out infinite;
}

@keyframes pulse-hint {
  0%, 100% { opacity: 0.25; }
  50%       { opacity: 0.6; }
}

/* ── Nav ─────────────────────────────────────────────── */
#nav {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  gap: 12px;
}

.nav-link {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  padding: 7px 18px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.nav-link:hover {
  color: #a78bfa;
  border-color: rgba(167,139,250,0.35);
  background: rgba(124,58,237,0.1);
}

/* SVG node styles set via D3, but glow filter is here */