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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

/* Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
    text-decoration: none;
}

.tagline {
    color: #666;
    font-size: 0.9rem;
}

/* Main Content */
main {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    margin-bottom: 2rem;
}

/* Articles Header */
.articles-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid #f0f0f0;
}

.articles-header h1 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: #666;
    font-size: 1.1rem;
}

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Article Card */
.article-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e9ecef;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.article-card-header h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.article-link {
    color: #667eea;
    text-decoration: none;
    transition: color 0.3s ease;
}

.article-link:hover {
    color: #764ba2;
    text-decoration: underline;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.article-date {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.article-actions {
    margin-top: 1rem;
}

.btn-read-more {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    font-weight: 500;
}

.btn-read-more:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* No Articles */
.no-articles {
    text-align: center;
    padding: 3rem;
    color: #666;
}

/* Article Detail */
.article-detail {
    max-width: 900px;
    margin: 0 auto;
}

.back-link {
    display: inline-block;
    color: #667eea;
    text-decoration: none;
    margin-bottom: 1rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: #764ba2;
}

.article-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid #f0f0f0;
}

.article-header h1 {
    font-size: 2.5rem;
    color: #333;
    margin: 1rem 0;
    line-height: 1.2;
}

.article-content {
    line-height: 1.8;
    color: #444;
}

.article-content h1,
.article-content h2,
.article-content h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

.article-content h1 {
    font-size: 2rem;
}

.article-content h2 {
    font-size: 1.5rem;
}

.article-content h3 {
    font-size: 1.2rem;
}

.article-content p {
    margin-bottom: 1rem;
}

.article-content code {
    background: #f4f4f4;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.article-content pre {
    background: #f4f4f4;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.article-content pre code {
    background: none;
    padding: 0;
}

.article-content svg {
    max-width: 100%;
    height: auto;
}

.error-message {
    text-align: center;
    padding: 3rem;
    color: #d32f2f;
    background: #ffebee;
    border-radius: 5px;
}

/* Footer */
.footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1.5rem 0;
    text-align: center;
    color: #666;
    margin-top: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }

    .articles-header h1 {
        font-size: 2rem;
    }

    .article-header h1 {
        font-size: 1.8rem;
    }

    .navbar .container {
        flex-direction: column;
        gap: 0.5rem;
    }
}