:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
    --text-color: #343a40;
    --card-bg-color: #ffffff;
    --border-color: #dee2e6;
    --link-color: #0056b3;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
    line-height: 1.6;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 15px;
}

.header {
    text-align: center;
    padding: 40px 0;
    background-color: var(--primary-color);
    color: white;
    margin-bottom: 20px;
}

.header h1 {
    font-size: 2.5em;
    margin: 0;
}

.header p {
    font-size: 1.2em;
    margin-top: 5px;
    opacity: 0.8;
}

.article {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.article-preview {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

.article-preview h3 {
    margin-top: 0;
}

.article-preview a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.2s;
}

.article-preview a:hover {
    color: var(--link-color);
    text-decoration: underline;
}

.article-title {
    font-size: 2em;
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 10px;
}

.article-meta {
    font-size: 0.9em;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.article-meta .category {
    font-weight: bold;
}

.article-content p {
    margin-top: 0;
}

.article-content a {
    color: var(--link-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease-in-out;
}

.article-content a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    color: var(--secondary-color);
    margin-top: 40px;
}

/* Media Queries */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2em;
    }

    .header p {
        font-size: 1em;
    }
    
    .article-title {
        font-size: 1.5em;
    }

    .container {
        padding: 0 10px;
    }
}