/* Fichier : css/header.css */

/* Header collé en haut */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  background-color: #3498db;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}