body {
            background-color: #4d4643;
            color: #fff;
            position: relative;
            min-height: 100vh;
        }
        a{
            color: inherit;
        }
        .navbar-custom {
            background-color: #EAFBF3 !important;
        }
        .navbar-custom .nav-link {
            color: #4d4643 !important;
        }
        .navbar-custom .nav-link:hover {
            color: #0070C0 !important;
        }
        .document-container {
            background-color: #fff;
            color: #333;
            border-radius: 8px;
            padding: 20px;
            margin-top: 20px;
            margin-bottom: 60px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .btn-download {
            background-color: #0070C0;
            color: #fff;
            border: none;
        }
        .btn-download:hover {
            background-color: #13a2efff;
            color: #fff;
        }
        .document-embed {
            width: 100%;
            height: 70vh;
            border: 1px solid #ddd;
            border-radius: 4px;
        }
        #preloader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.7);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
        }
        .spinner-border {
            width: 4.5rem;
            height: 4.5rem;
        }
        footer {
            background-color: #000;
            color: #fff;
            padding: 40px 0;
        }
        .footer-column {
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #fff;
            text-decoration: none;
        }
        .footer-links a:hover {
            color: #0070C0;
        }
        .social-icon {
            font-size: 1.5rem;
            margin-right: 10px;
        }
        @media (max-width: 768px) {
            .document-embed {
                height: 50vh;
            }
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: #0070C0;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            text-decoration: none;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 999;
        }
        .back-to-top:hover {
            background-color: #13a2efff;
            color: white;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }