* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  body {
    padding-top: 40px; /* Space for fixed header + 20px extra */
  }

  header {
    width: 100%;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
  }

  .logo-container {
    position: absolute;
    left: 0;
    top: 0;
    height: 100px; /* Default height for large screens */
    display: flex;
    z-index: 10;
  }

  .logo {
    display: block;
  }

  #main_logo img {
    height: 100px; /* Default height for large screens */
    width: auto;
    display: block;
  }

  .top-header {
    background-color: #7ebed0;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
  }

  .search-form {
    display: flex;
    flex-grow: 0;
    width: 500px;
    margin: 0 auto;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }

  .search-input {
    padding: 9px 16px;
    border: 2px solid #fff;
    border-radius: 20px 0 0 20px;
    width: 100%;
    font-size: 14px;
  }

  .search-button {
    background-color: #5f9ea0;
    color: white;
    border: none;
    padding: 0px 24px;
    border-radius: 0 20px 20px 0;
    cursor: pointer;
    font-weight: bold;
    font-size: 16px;
    text-align: center;
  }

  .donate-container {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-left: auto;
    z-index: 5;
  }

  .paypal-link {
    display: flex;
    align-items: center;
  }

  .paypal-img {
    height: 25px;
    width: auto;
  }

  .donbtn {
    height: 25px;
    vertical-align: middle;
    transition: height 0.2s ease;
  }

  .donate-container .donate-link {
    background-color: #5f9ea0;
    color: white;
    text-decoration: none;
    font-weight: bold;
    padding: 5px 22px;
    border: 2px solid #5f9ea0;
    border-radius: 4px;
    transition: all 0.2s ease;
    transition:
      opacity 0.2s ease,
      padding 0.2s ease,
      font-size 0.2s ease;
  }

  .donate-container .donate-link:hover {
    opacity: 0.9;
  }

  .lower-header {
    background-color: #c7dde3;
    padding: 0 8px;
    display: flex;
    justify-content: center;
    height: 60px;
    align-items: center;
  }

  /* Dropdown overlay */
  .dropdown-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: transparent;
    z-index: 0;
    display: none;
    cursor: default;
  }
  
  #about-toggle:checked ~ .dropdown-overlay {
    display: block;
    z-index: 900;
  }

  .dropdown {
    position: relative;
    display: inline-block;
  }

  .dropdown-button {
    background-color: transparent;
    color: black;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-weight: bold;
    display: flex;
    align-items: center;
    margin: 0 20px;
    font-size: 16px;
    font-family: inherit;
    padding: 0;
  }

  .dropdown-icon {
    font-size: 12px;
    margin-left: 8px;
    display: inline-block;
    color: black;
    transition: transform 0.2s ease;
  }

  .dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
  }

  .dropdown-content {
    display: none;
    position: absolute;
    background-color: white;
    min-width: 200px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    z-index: 910;
    border-radius: 4px;
    overflow: hidden;
  }

  .dropdown-content a {
    color: black;
    padding: 10px 16px;
    text-decoration: none;
    display: block;
    font-weight: bold;
    font-size: 14px;
  }

  .dropdown-content a:hover {
    background-color: #f1f1f1;
    text-decoration: underline;
  }

  .dropdown:hover .dropdown-content {
    display: block;
  }

  /* About dropdown toggle */
  #about-toggle:checked ~ .lower-header .dropdown .dropdown-content {
    display: block;
  }

  #about-toggle:checked ~ .lower-header .dropdown .dropdown-icon {
    transform: rotate(180deg);
  }

  .main-links {
    display: flex;
    align-items: center;
    overflow-x: auto;
    flex-wrap: nowrap;
  }

  .main-links a {
    color: black;
    text-decoration: none;
    margin: 0 20px;
    font-weight: bold;
    font-size: 16px;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .main-links a:hover,
  .dropdown-button:hover {
    text-decoration: underline;
  }

  .tertiary-header {
    background-color: #e0ecf0;
    padding: 0 20px;
    display: none;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
    overflow-x: auto;
    height: 60px;
    min-height: 60px;
  }

  .tertiary-header a,
  .tertiary-header::before,
  .tertiary-header::after {
    color: black;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .tertiary-header a:hover,
  .tertiary-header::before:hover,
  .tertiary-header::after:hover {
    text-decoration: underline;
  }

  .tertiary-header .tertiary-link {
    display: none;
    color: black;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .tertiary-header .tertiary-link:hover {
    text-decoration: underline;
  }

  .search-icon-btn {
    display: none;
  }

  @media (max-width: 1400px) {
    .donbtn {
      height: 20px;
    }
    .donate-link {
      padding: 4px 18px;
      font-size: 14px;
    }
  }

  @media (max-width: 1200px) {
    .logo-container {
      height: 85px; /* Smaller logo for medium screens */
    }
    #main_logo img {
      height: 85px; /* Smaller logo for medium screens */
    }
  }

  @media (max-width: 1110px) {
    .logo-container {
      height: 60px; /* Match top header height */
    }
    #main_logo img {
      height: 60px; /* Match top header height */
    }
  }

  @media (max-width: 1024px) {
    .logo-container {
      height: 100px; /* Restore original logo height */
    }
    #main_logo img {
      height: 100px; /* Restore original logo height */
    }
    .search-form {
      width: 300px;
    }
    .top-header {
      justify-content: space-between;
    }
    .tertiary-header {
      display: flex;
    }
    .lower-header .main-links .link-freq-downloaded,
    .lower-header .main-links .link-main-categories {
      display: none;
    }
    .tertiary-header .tertiary-link {
      display: inline-block;
    }
    .lower-header,
    .tertiary-header {
      padding-left: 10px;
      padding-right: 10px;
    }
    .lower-header .dropdown-button,
    .lower-header .main-links a {
      margin: 0 15px;
    }
    .tertiary-header .tertiary-link {
      margin: 0 15px;
    }
    body {
      padding-top: 100px; /* Space for taller fixed header + 20px extra */
    }
  }

  /* For touch devices, use click/tap instead of hover */
  @media (hover: none) {
    .dropdown:hover .dropdown-content {
      display: none;
    }
  }

  @media (max-width: 935px) {
    .logo-container {
      height: 90px; /* Smaller logo for medium screens */
    }
    #main_logo img {
      height: 90px; /* Smaller logo for medium screens */
    }
  }

  @media (max-width: 835px) {
    .logo-container {
      height: 85px; /* Smaller logo for medium screens */
    }
    #main_logo img {
      height: 85px; /* Smaller logo for medium screens */
    }
  }

  @media (max-width: 735px) {
    .logo-container {
      height: 60px; /* Smaller logo for medium screens */
    }
    #main_logo img {
      height: 60px; /* Smaller logo for medium screens */
    }
  }

  @media (max-width: 768px) {
    .donbtn {
      height: 15px;
    }
    .donate-link {
      padding: 3px 15px;
      font-size: 13px;
    }
  }

  @media (max-width: 715px) {
    .donatelink {
      display: none;
    }
    .donate-link {
      padding: 5px 22px;
      font-size: 16px;
    }
  }

  @media (max-width: 620px) {
    .donbtn {
      height: 12px;
    }
    .donate-link {
      padding: 3px 12px;
      font-size: 12px;
    }
  }

  @media (max-width: 500px) {
    .search-form {
      width: auto;
      justify-content: center;
    }
    .search-input,
    .search-button {
      display: none;
    }
    .search-icon-btn {
      display: inline-block;
      background-color: #5f9ea0;
      color: white;
      border: 2px solid #5f9ea0;
      padding: 4px 8px;
      border-radius: 4px;
      font-size: 16px;
      transition: opacity 0.2s ease;
      line-height: 1;
    }
    .search-icon-btn:hover {
      opacity: 0.9;
    }
    .search-icon-btn .search-icon {
      display: inline-block;
      width: 2em;
      height: 2em;
      vertical-align: middle;
      fill: currentColor;
    }

    /* Toggle Search Bar on Small Screens */
    #search-toggle:checked ~ .logo-container,
    #search-toggle:checked ~ .top-header .donate-container,
    #search-toggle:checked
      ~ .top-header
      .search-form
      label.search-icon-btn {
      display: none; /* Hide logo, donate, search icon when active */
    }

    #search-toggle:checked ~ .top-header .search-form {
      width: calc(100% - 120px); /* Further reduced width */
      position: absolute; /* Keep absolute positioning */
      left: 60px; /* Adjust position based on new padding */
      transform: none; /* Remove centering */
      justify-content: flex-start; /* Align items left */
      display: flex; /* Ensure form is flex container */
    }

    #search-toggle:checked ~ .top-header .search-form .search-input,
    #search-toggle:checked ~ .top-header .search-form .search-button {
      display: block; /* Show input and button */
    }

    #search-toggle:checked ~ .top-header .search-form .search-input {
      flex-grow: 1; /* Allow input to grow */
    }

    #search-toggle:checked ~ .top-header {
      justify-content: flex-start; /* Align the form within the header */
    }
  }

  @media (max-width: 550px) {
    .search-form {
      width: 200px;
    }
  }

  @media (max-width: 435px) {
    .lower-header .dropdown-button,
    .lower-header .main-links a,
    .tertiary-header .tertiary-link {
      font-size: 15px;
      margin: 0 10px; /* Also reduce margin slightly */
    }
    .lower-header,
    .tertiary-header {
      padding-left: 5px;
      padding-right: 5px;
    }
    .search-icon-btn {
      padding: 3px 6px; /* Reduce padding */
    }
  }

  @media (max-width: 400px) {
    .donate-container .donate-link {
      padding: 5px 18px;
      font-size: 11px;
    }
  }