/* Reset and Base Styles */
* {
    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: #f8f9fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header Styles */
.site-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.site-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.nav-menu a:hover {
    opacity: 0.8;
    background-color: rgba(255, 255, 255, 0.1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

.article-content {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.article-content h1 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 1rem;
    border-bottom: 3px solid #667eea;
    padding-bottom: 0.5rem;
}

.article-content h2 {
    font-size: 1.8rem;
    color: #444;
    margin: 2rem 0 1rem 0;
    padding-left: 1rem;
    border-left: 4px solid #667eea;
}

.article-content h3 {
    font-size: 1.4rem;
    color: #555;
    margin: 1.5rem 0 0.8rem 0;
}

.article-content p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    line-height: 1.7;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    margin: 1.5rem 0;
}

.article-content ul, .article-content ol {
    margin: 1rem 0 1rem 2rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content strong {
    color: #667eea;
    font-weight: 600;
}

/* Footer Styles */
.site-footer {
    background-color: #2c3e50;
    color: white;
    padding: 3rem 0 1rem 0;
    margin-top: 3rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #ecf0f1;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 1rem;
    text-align: center;
    color: #bdc3c7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #667eea;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .article-content {
        padding: 1rem;
        margin: 1rem 0;
    }
    
    .article-content h1 {
        font-size: 2rem;
    }
    
    .article-content h2 {
        font-size: 1.5rem;
    }
    
    .article-content h3 {
        font-size: 1.2rem;
    }
    
    .article-content p {
        font-size: 1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.5rem;
    }
    
    .article-content h1 {
        font-size: 1.8rem;
    }
    
    .article-content h2 {
        font-size: 1.3rem;
    }
    
    .main-content {
        padding: 1rem 0;
    }
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer {
        display: none;
    }
    
    .article-content {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}