body {
            font-family: Arial, sans-serif;
            background-color: #1e1e2e;
            color: #ffffff;
            text-align: center;
            margin: 0;
            padding: 0;
        }
        header {
            background-color: #4c566a;
            padding: 20px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        }
        h1, h2 {
            margin: 10px 0;
        }
        main {
            margin-top: 40px;
        }
        .folders {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 20px;
        }
        .folder {
            display: inline-block;
            padding: 15px 25px;
            background-color: #88c0d0;
            color: #2e3440;
            text-decoration: none;
            font-weight: bold;
            border-radius: 8px;
            transition: 0.3s;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            cursor: pointer;
        }
        .folder:hover {
            background-color: #81a1c1;
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
        }
        .card {
            background-color: #3b4252;
            border-radius: 8px;
            width: 50%;
            margin: 20px auto;
            padding: 15px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .card h3 {
            margin: 0;
            padding: 10px;
        }
        .card ul {
            list-style: none;
            padding: 0;
            display: none;
        }
        .card.active ul {
            display: block;
        }
        .card:hover {
            background-color: #4c566a;
        }
        .card ul li {
            margin: 10px 0;
        }
        .card ul li a {
            text-decoration: none;
            color: #88c0d0;
            font-weight: bold;
            transition: 0.3s;
        }
        .card ul li a:hover {
            color: #81a1c1;
        }
        footer {
            position: fixed;
            bottom: 0px;
            width: 100%;
            padding: 10px;
            background-color: #3b4252;
        }

        .card ul li a i {
            margin-right: 8px;
            transition: transform 0.3s ease-in-out;
        }

        .card ul li a:hover i {
            transform: scale(1.3) translateY(-3px);
        }

        .folder {
            transition: box-shadow 0.3s ease-in-out, transform 0.3s ease-in-out;
        }

        .folder:hover {
            box-shadow: 0px 0px 15px rgba(255, 255, 255, 0.4);
            transform: scale(1.05);
        }
        .subtitle {
            font-size: 0.9em;
            color: #bbbbbb;
            margin-top: 5px;
        }