body {
    background: #f0f0f0 url('https://www.transparenttextures.com/patterns/lined-paper.png');
    font-family: Verdana, Geneva, sans-serif;
    color: #333;
}

.header {
    background: linear-gradient(to bottom, #eaeaea, #cccccc);
    border-bottom: 1px solid #999;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-family: Georgia, Times, 'Times New Roman', serif;
    font-size: 2.5em;
    color: #000080; /* Classic Blue */
    margin: 0;
    text-shadow: 2px 2px 3px #aaa;
}

.auth-links a {
    margin-left: 15px;
    color: #000080;
    text-decoration: none;
}

.container {
    background-color: #fff;
    border: 1px solid #ccc;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 5px;
}

.category-list {
    background-color: #f8f9fa;
    border-right: 1px solid #dee2e6;
    padding: 15px;
}

.category-list h3 {
    font-family: Georgia, Times, "Times New Roman", serif;
    font-size: 1.5rem;
    color: #0048ad;
    border-bottom: 2px solid #f2c94c;
    padding-bottom: 10px;
    margin-bottom: 15px;
}

.category-list .nav-link {
    color: #0000FF;
    padding: 5px 0;
    font-size: 0.9rem;
    text-decoration: none;
}

.category-list .nav-link:hover {
    text-decoration: underline;
}

.content {
    padding: 20px;
}

.content h2 {
    font-family: Georgia, Times, "Times New Roman", serif;
    color: #0048ad;
    border-bottom: 2px solid #ccc;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.link-item {
    margin-bottom: 20px;
    border: 1px solid #ddd;
    padding: 15px;
    border-radius: 4px;
    background-color: #fff;
    transition: box-shadow 0.3s ease;
}

.link-item:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.link-item .thumbnail {
    width: 120px;
    height: 90px;
    object-fit: cover;
    border: 1px solid #ccc;
    margin-right: 15px;
    float: left;
}

.link-item-body {
    overflow: hidden;
}

.link-item-title {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.link-item-title a {
    color: #0000FF;
    text-decoration: none;
}

.link-item-title a:hover {
    text-decoration: underline;
}

.link-item-url {
    font-size: 0.8rem;
    color: #006400; /* Dark Green */
    margin-bottom: 5px;
    display: block;
}

.link-item-description {
    font-size: 0.9rem;
    color: #555;
}

.footer {
    text-align: center;
    padding: 20px 0;
    background-color: #343a40;
    color: white;
    font-size: 0.9rem;
}