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

      body {
        background-image: url("frontpage/bg8.jpg");
        background-size:contain;
        background-attachment: fixed;
        background-repeat: repeat;
        font-family: Arial, sans-serif;
      }
      
      /* Header Styles */
      .realvjy {
        width: 100vw;
        position: fixed;
        top: 0px;
        padding: 8px;
        display: grid;
        grid-template-columns: 40px 1fr auto auto;
        justify-items: center;
        align-items: center;
        z-index: 111;
        background-color: rgba(0, 0, 0, 0.485);
      }

      #contact {
        display: flex;
        flex-direction: row;
        place-content: center;
        color: white;
        padding: 0 20px 0 0px;
        text-decoration: none;
      }

      /* Sidebar Styles */
      .sidebar-toggle {
        color: white;
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        
        margin-right: 10px;
      }
      
      .sidebar {
        position: fixed;
        top: 60px;
        right: -250px;
        width: 250px;
        height: calc(100vh - 60px);
          background-color: rgba(0, 0, 0, 0.436);
        transition: right 0.3s ease;
        z-index: 100;
        overflow-y: auto;
        padding: 20px 0;
      }
      
      .sidebar.open {
        right: 0;
      }
      
      .sidebar-category {
        color: white;
        padding: 10px 20px;
        cursor: pointer;
        transition: all 0.3s;
        border-left: 3px solid transparent;
      }
      
      .sidebar-category:hover, .sidebar-category.active {
        background-color: rgba(255, 255, 255, 0.1);
        border-left: 3px solid #fff;
      }
      
      /* Main Content Styles */
      .main-content {
        margin-top: 60px;
        display: flex;
        flex-direction: column;
        padding: 20px;
      }
      
      .book-wrapper {
        width: 100%;
        max-width: 900px;
        position: relative;
        margin: 0 auto;
        column-count: 3;
        column-gap: 12px;
        padding: 4px;
      }
      
      .book-items {
        position: relative;
        cursor: default;
        padding: 30px;
        margin: 0;
        display: grid;
        break-inside: avoid;
      }

      .main-book-wrap {
        position: relative;
      }

      .book-cover {
        position: relative;
      }

      .book-cover .book-inside {
        position: absolute;
        width: 90%;
        height: 96%;
        top: 1%;
        left: 16px;
        border: 1px solid grey;
        border-radius: 2px 6px 6px 2px;
        background: white;
        box-shadow:
          10px 40px 40px -10px #00000030,
          inset -2px 0 0 grey,
          inset -3px 0 0 #dbdbdb,
          inset -4px 0 0 white,
          inset -5px 0 0 #dbdbdb,
          inset -6px 0 0 white,
          inset -7px 0 0 #dbdbdb,
          inset -8px 0 0 white,
          inset -9px 0 0 #dbdbdb;
      }

      .book-cover .book-image {
        line-height: 0;
        position: relative;
        border-radius: 2px 6px 6px 2px;
        box-shadow:
          6px 6px 18px -2px rgba(0, 0, 0, 0.2),
          24px 28px 40px -6px rgba(0, 0, 0, 0.1);
        transition: all 0.3s ease-in-out;
        transform: perspective(2000px) rotateY(-15deg) translateX(-10px)
          scaleX(0.94);
        cursor: pointer;
      }

      .book-image img {
        grid-row: 1 / -1;
        grid-column: 1;
        width: 100%;
        border-radius: 2px 6px 6px 2px;
      }

      .book-image:hover {
        transform: perspective(2000px) rotateY(0deg) translateX(0px) scaleX(1);
        transform-style: preserve-3d;
        box-shadow:
          6px 6px 12px -1px rgba(0, 0, 0, 0.1),
          20px 14px 16px -6px rgba(0, 0, 0, 0.1);
      }

      .effect {
        position: absolute;
        width: 20px;
        height: 100%;
        margin-left: 16px;
        top: 0;
        border-left: 2px solid #00000010;
        background-image: linear-gradient(
          90deg,
          rgba(255, 255, 255, 0.2) 0%,
          rgba(255, 255, 255, 0) 100%
        );
        transition: all 0.5s ease;
        z-index: 5;
      }

      .light {
        width: 90%;
        height: 100%;
        position: absolute;
        border-radius: 3px;
        background-image: linear-gradient(
          90deg,
          rgba(255, 255, 255, 0) 0%,
          rgba(255, 255, 255, 0.2) 100%
        );
        top: 0;
        right: 0;
        opacity: 0.1;
        transition: all 0.5s ease;
        z-index: 4;
      }

      .book-image:hover .effect {
        margin-left: 14px;
      }
      
      /* Category Highlight */
      .category-highlight .book-image {
        box-shadow: 
          0 0 0 4px rgb(255, 165, 75),
          6px 6px 18px -2px rgba(0, 0, 0, 0.2),
          24px 28px 40px -6px rgba(0, 0, 0, 0.1);
          border: 2px solid white;
      }
      
      /* Category Title */
      .category-title {
        font-size: 1.5em;
        color: rgb(255, 255, 255);
        background-color: rgba(0, 0, 0, 0.183);
        padding: 10px;
        border-radius: 10px;
        margin: 20px 0;
        text-align: center;
        grid-column: 1 / -1;
      }

      /* Responsive Styles */
      @media screen and (max-width: 780px) {
        .book-wrapper {
          column-count: 2;
        }
        
        .sidebar {
          width: 200px;
        }
      }
      
      @media screen and (max-width: 480px) {
        .book-wrapper {
          column-count: 1;
        }
        
        .sidebar {
          width: 180px;
        }
        
        .realvjy {
          grid-template-columns: 40px 1fr auto auto;
        }
      }
      
      @media only screen and (max-width: 800px) {
        body {
          background-attachment: fixed;
          background-repeat: repeat;
        }
      }