body.gradient {
  background: linear-gradient(to right, #ff0055, #ff9900);
  color: #fff;
}

body.dark {
  background: #111;
  color: #eee;
}

body.light {
  background: #f0f0f0;
  color: #333;
}

.theme-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #ff0055;
  color: #fff;
  border: none;
  padding: 12px 18px;
  font-size: 14px;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  transition: background 0.3s;
  z-index: 9999;
}

.theme-toggle:hover {
  background: #ff3300;
}