/* ============================
   Layout & Containers
============================= */
#main-header {
  background: none;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  color: #fff;
  text-align: center;
  border-radius: 0 0 12px 12px;
  backdrop-filter: blur(6px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: background-image 0.5s ease-in-out, opacity 0.3s ease;
  position: sticky;
  top: 0;
}

  
#header-placeholder {
  position: sticky;
  top: 0;
  z-index: 999;
}
  

  


  .container {
    max-width: 960px;
    margin: auto;
    padding: 2rem;
    background-color: rgba(255, 255, 255, 0.85);
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  .content-container {
    background: #fff;
    max-width: 800px;
    margin: 2rem auto;
    padding: 1rem;
  }

  .background-overlay {
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(243, 241, 237, 0.85);
  }

  footer {
    margin-top: 40px;
    text-align: center;
    color: #777;
  }