/* Titre */
h2 {
  text-align: center;
}

/* Menu principal */
#menu {
  position: absolute;
  top: 10px;
  left: 10px;
  background: white;
  padding: 10px 15px;
  border-radius: 6px;
  box-shadow: 0 0 6px rgba(0,0,0,0.3);
  z-index: 20;
  font-family: sans-serif;
}
#menu a {
  margin-right: 10px;
  text-decoration: none;
  color: #0077cc;
  font-weight: bold;
}

/* Sous-menu */
#sub-menu {
  position: absolute;
  top: 60px;
  left: 10px;
  background: white;
  padding: 10px 15px;
  border-radius: 6px;
  box-shadow: 0 0 6px rgba(0,0,0,0.3);
  z-index: 20;
  font-family: sans-serif;
}
#sub-menu button {
  margin-right: 5px;
  cursor: pointer;
}

/* Légende */
#legend {
  position: absolute;
  bottom: 60px;
  left: 20px;
  background: white;
  padding: 10px 15px;
  border-radius: 6px;
  box-shadow: 0 0 6px rgba(0,0,0,0.3);
  font-family: sans-serif;
  font-size: 14px;
  z-index: 10;
}
.legend-item { 
  display: flex; 
  align-items: center; 
  gap: 6px;
}
.color-box {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 6px;
  vertical-align: middle;
}