/* Header */
header {
  margin-left: 220px;
  width: calc(100% - 220px);
  height: 400px;
  background-image: url('../../afbeeldingen/achtergrond/A11L.jpg');
  background-size: cover;
  background-position: center;
  background-color: #333; /* fallback kleur */
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-align: center;
  box-shadow: inset 0 0 100px rgba(0,0,0,0.4);
  position: relative;
  overflow: hidden;
  top: 0;
  transition: margin-left 0.3s ease;
}

    header h1 {
      margin: 0;
      padding: 0;
      font-size: 2.5rem;
      text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
    }



    /* Responsive */
    @media (max-width: 900px) {
      header {
        margin-left: 0;
        width: 100%;
        height: auto;
        min-height: 200px;
        background-size: cover;
        background-position: center;
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        justify-content: center;
        padding: 20px;
      }

                header h1 {
        font-size: 1.8rem;
        padding: 0 10px;
      }
    }