/* Base */
body {
    font-family: sans-serif;
    margin: 0; padding: 0;
    display: flex; flex-direction: column;
    height: 100vh;
  }
  header {
    background: #004a7c; color: #fff; padding: 0.5rem;
  }
  #controls {
    margin-top: 0.5rem;
  }
  #controls input,
  #controls button {
    font-size: 1rem; margin-right: 0.5rem; padding: 0.3rem;
  }
  main {
    flex: 1; overflow: auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 0.5rem; padding: 0.5rem;
  }
  
  /* Cellule de grille */
  .cell {
    background: #f5f5f5; border: 1px solid #ddd;
    display: flex; flex-direction: column;
    position: relative;
  }
  .cell header {
    background: #eee; padding: 0.3rem; font-weight: bold;
    display: flex; justify-content: space-between; align-items: center;
  }
  .cell header button {
    background: transparent; border: none; cursor: pointer; font-size: 1.1rem;
  }
  .cell .pdf-viewer,
  .cell .perturb {
    flex: 1; overflow: auto;
  }
  .cell .pdf-viewer canvas {
    width: 100% !important; /* pour page width */
  }
  .cell.landscape .pdf-viewer {
    display: none; /* paysage itinéraire */
  }
  .cell.landscape iframe {
    display: block; width: 100%; height: 100%;
  }
  .cell iframe {
    display: none;
  }