/* ===== Theme Switcher ===== */
#theme-switcher {
  position: fixed;
  bottom: 18px;
  right: 18px;
  display: flex;
  gap: 8px;
  z-index: 100;
  align-items: center;
}

.theme-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.45);
  cursor: pointer;
  padding: 0;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.theme-btn:hover {
  transform: scale(1.18);
  border-color: rgba(255,255,255,0.9);
}

.theme-btn.active {
  border-color: #ffffff;
  box-shadow: 0 0 0 2px rgba(255,255,255,0.5);
  transform: scale(1.15);
}

/* Colour swatches */
.theme-btn[data-theme="default"] { background: linear-gradient(135deg, #4488aa 0%, #43a9df 100%); }
.theme-btn[data-theme="neon"]    { background: linear-gradient(135deg, #050008 0%, #00ffff 50%, #ff00ff 100%); }

/* ===== Theme Label ===== */
#theme-label {
  position: fixed;
  bottom: 18px;
  left: 18px;
  font-family: monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}

#theme-label.visible {
  opacity: 1;
}