:root {
  --bg-color: #e3e1dc;
  --text-muted: #b5b3ae;
  --toggle-hover: #9e9c96;
}

[data-theme="dark"] {
  --bg-color: #161618;
  --text-muted: #5e5d63;
  --toggle-hover: #8f8e96;
}

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

body {
  background: var(--bg-color);
  font-family: 'Cormorant Garamond', Georgia, serif;
  cursor: default;
  overflow: hidden;
  height: 100vh;
  transition: background 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

canvas#physics {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1;
  will-change: contents;
  pointer-events: none;
}

.theme-toggle {
  position: fixed;
  top: 40px;
  right: 50px;
  z-index: 10;
  font-family: 'Overpass Mono', monospace;
  font-weight: 300;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.3s ease;
  user-select: none;
  opacity: 0;
  animation: fadeUp 1s ease 1s forwards;
}

.theme-toggle:hover {
  color: var(--toggle-hover);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}