* {
    box-sizing: border-box;
  }
  
  body {
    font-family: Arial, sans-serif;
    background-color: lightgoldenrodyellow;
    margin: 0;
    padding: 0;
    text-align: center;
  }
  
  .container {
    padding: 20px;
    max-width: 900px;
    margin: 0 auto;
  }
  
  .nav {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 30px;
  }
  
  .nav button,
  .nav select {
    font-size: 18px;
    padding: 10px 16px;
    cursor: pointer;
    border-radius: 8px;
    border: 1px solid #ccc;
    background: white;
  }
  
  #year {
    font-size: 24px;
    font-weight: bold;
  }
  
  .content {
    background: white;
    padding: 20px;
    border: 4px solid goldenrod;
    border-radius: 12px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    transition: opacity 0.5s ease;
    opacity: 1;
  }
  
  .content img {
    display: block;
    margin: 20px auto;
    max-width: 100%;
    height: auto;
    border-radius: 10px;
  }
  
  .fade-out {
    opacity: 0;
  }
  
  .fade-in {
    opacity: 1;
  }
  
  /* Mobilbarát beállítások */
  @media (max-width: 600px) {
    .nav {
      flex-direction: column;
    }
  
    .nav button,
    .nav select {
      width: 100%;
      font-size: 16px;
    }
  
    #year {
      font-size: 20px;
    }
  
    .container {
      padding: 10px;
    }
  
    .content {
      padding: 15px;
    }
  }

  /*--------------------new----------------------*/
  .page-wrapper {
    display: flex;
    flex-direction: row;
    min-height: 100vh;
  }
  
  /* Oldalsávok */
  .side-panel {
    width: 200px;
    background-color: #e9e9e9;
    padding: 20px;
    overflow-y: auto;
    flex-shrink: 0;
  }
  
  /* Középső fő rész */
  .main-content {
    flex-grow: 1;
    padding: 20px;
    max-width: 900px;
    margin: auto;
  }
  
  .content img {
    display: block;
    margin: 20px auto;
    max-width: 100%;
    height: auto;
    border-radius: 10px;
  }
  
  /* Reszponzív nézet (mobil) */
  @media (max-width: 900px) {
    .page-wrapper {
      flex-direction: column;
    }
  
    .side-panel {
      width: 100%;
      order: 2;
    }
  
    .main-content {
      order: 1;
      padding: 10px;
    }
  }
  
  /* === HEADER === */
.site-header {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 5px 5px;
    font-size: 15px;
  }
  
  /* === FOOTER === */
  .site-footer {
    background-color: #f1f1f1;
    color: #333;
    text-align: center;
    padding: 8px 10px;
    font-size: 14px;
    border-top: 1px solid #ccc;
  }
  
  /* Ha fix alsó footert szeretnél, válts erre (opcionális) */
  /*
  .site-footer {
    position: fixed;
    bottom: 0;
    width: 100%;
  }
  */
  
  @media (max-width: 600px) {
    .site-header {
      font-size: 18px;
      padding: 12px;
    }
  
    .site-footer {
      font-size: 12px;
    }
  }