:root {
  --bg-color: #ffffff;
  --text-color: #000000;
  --accent-color: #007BFF;
}

body.dark {
  --bg-color: #1e1e1e;
  --text-color: #f0f0f0;
  --accent-color: #4dabf7;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
}

/* Bouton thème */
.theme-wrapper-fixed {
  position: fixed;
  top: 15px;
  left: 15px;
  background-color: var(--bg-color);
  border: 1px solid #ccc;
  padding: 6px 10px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

#theme-toggle {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 18px;
  cursor: pointer;
  padding: 0;
  margin: 0;
}

/* Popup messages */
#popup-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 20px 30px;
  font-size: 1.2em;
  border-radius: 10px;
  color: #fff;
  background-color: #333;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease-in-out;
  z-index: 10000;
}

#popup-message.visible {
  opacity: 1;
}

#popup-message.success {
  background-color: #28a745;
}

#popup-message.error {
  background-color: #dc3545;
}