body {
    /*background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.8) 100%), url('../img/bg.png');*/
    background-image: url(http://quadrbs.com/uploads/bg.png);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: 0;
  }

  header.top {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(255, 255, 255, 0.8);
    z-index: 1;
  }

  header {
    position: absolute;
    top: 28%;
    left: 50%;
    transform: translate(-50%, -50%);
    /* background-color: #333; */
    color: #fff;
    text-align: center;
    padding: 10px 0;
    z-index: 2;
    box-sizing: border-box;
  }

  header::before,
  header::after {
    content: "";
    display: block;
    height: 10px;
    /* background-color: #333; */
  }

  nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 60px;
    padding: 0 20px;
    max-width: 100%;
    margin: 0 auto;
    /* background-image: linear-gradient(to right, #0066ff, #003cff); */
    border-radius: 5px;
    width: 100%;
    box-sizing: border-box;
  }

  .nav-item {
    color: #fff;
    text-decoration: none;
    margin: 0 10px;
    padding: 5px 10px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    font-size: 16px;
    font-weight: bold;
  }

  .nav-item:hover {
    /* background-color: #555; */
    color: #e5ff00;
  }

  .logo {
    /* height: 50px; */
    margin: 0 10px;
    /* position: absolute; */
    /* left: auto; */
    /* right: 50%; */
    /* transform: translateX(50%); */
  }

  .logo:hover {
    background-color: transparent;
  }

  main {
    margin-top: 160px;
    padding: 2rem 2rem;
  }

  .content {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin: 2rem auto;
    max-width: 800px;
  }

  nav .nav-item:first-child {
    margin-left: 0;
  }

  nav .nav-item:last-child {
    margin-right: 0;
  }

  nav {
    top: 80%;
    transform: translateY(-50%);
  }


  .image-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding: 0 20px;
  }
  
  .column img {
    width: 100%;
    height: auto;
    border-radius: 5px;
  }

  body.single-column .image-columns {
    grid-template-columns: 1fr;
  }

  .centered-image {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1.5); /* Adjust scale as needed */
    max-width: 50%;
    max-height: 50%;
    width: auto;
    height: auto;
    z-index: 10;
    transition: transform 0.3s ease-in-out;
    transform-origin: center center; /* Ensure the zoom effect comes from the center */
  }
  
  .hidden {
    display: none;
  }
  
  h1 {
    font-size: 1.5rem;
  }