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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 2rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

nav {
    background: #34495e;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    display: block;
    transition: background 0.3s;
    border-radius: 4px;
}

nav ul li a:hover {
    background: #2c3e50;
}

main {
    padding: 2rem 0;
    min-height: calc(100vh - 300px);
}

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

.post-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.post-card h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.post-card h2 a {
    color: #2c3e50;
    text-decoration: none;
}

.post-card h2 a:hover {
    color: #3498db;
}

.post-excerpt {
    color: #666;
    margin-bottom: 1rem;
}

.post-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.category-badge {
    background: #3498db;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
}

.read-more {
    display: inline-block;
    background: #3498db;
    color: white;
    padding: 0.5rem 1.5rem;
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.3s;
}

.read-more:hover {
    background: #2980b9;
}

article {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    max-width: 800px;
    margin: 2rem auto;
}

article h1 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 2rem;
}

article h2 {
    color: #2c3e50;
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

article h3 {
    color: #34495e;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

article p {
    margin-bottom: 1rem;
    text-align: justify;
}

article ul, article ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.back-link {
    display: inline-block;
    margin-bottom: 1rem;
    color: #3498db;
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
}

footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav ul li {
        margin: 0.5rem 0;
    }
}