/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3366cc;
    --primary-hover: #2851a3;
    --secondary-color: #f8f9fa;
    --text-color: #333;
    --text-light: #666;
    --border-color: #ddd;
    --shadow: 0 1px 4px rgba(0,0,0,0.1);
    --max-width: 1200px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--secondary-color);
}

/* Header Styles */
header {
    background: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    white-space: nowrap;
}

.search-bar {
    flex: 1;
    max-width: 500px;
}

.search-bar input {
    width: 100%;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.auth-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-menu {
    display: none;
    background: white;
    border-top: 1px solid var(--border-color);
    padding: 1rem;
}

.mobile-menu a {
    display: block;
    padding: 0.5rem 0;
    color: var(--text-color);
    text-decoration: none;
}

.mobile-menu input {
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

/* Button Styles */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--secondary-color);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

/* Layout Styles */
.container {
    max-width: var(--max-width);
    margin: 2rem auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
}

/* Sidebar Styles */
.sidebar {
    background: white;
    padding: 1.5rem;
    border-radius: 4px;
    box-shadow: var(--shadow);
    height: fit-content;
}

.sidebar h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
    font-size: 1.1rem;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    margin-bottom: 0.5rem;
}

.sidebar a {
    color: var(--primary-color);
    text-decoration: none;
}

.sidebar a:hover {
    text-decoration: underline;
}

.sidebar a.active {
    font-weight: bold;
}

/* Main Content Styles */
.main-content {
    background: white;
    padding: 2rem;
    border-radius: 4px;
    box-shadow: var(--shadow);
    min-height: 400px;
}

/* Article Styles */
.article-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.article-title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.article-meta {
    color: var(--text-light);
    font-size: 0.9rem;
}

.article-meta a {
    color: var(--primary-color);
    text-decoration: none;
}

.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-content h1,
.article-content h2,
.article-content h3 {
    margin: 2rem 0 1rem;
    color: var(--text-color);
}

.article-content h2 {
    font-size: 1.8rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.article-content h3 {
    font-size: 1.4rem;
}

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

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

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

.article-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.article-content a:hover {
    text-decoration: underline;
}

/* Homepage Styles */
.welcome-box {
    background: var(--secondary-color);
    padding: 2rem;
    border-radius: 4px;
    margin-bottom: 2rem;
    text-align: center;
}

.welcome-box h1 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.featured-articles h2,
.recent-changes h2 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

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

.article-card {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: box-shadow 0.3s;
}

.article-card:hover {
    box-shadow: var(--shadow);
}

.article-card h3 {
    margin-bottom: 0.5rem;
}

.article-card a {
    color: var(--primary-color);
    text-decoration: none;
}

.changes-list {
    list-style: none;
}

.changes-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.change-meta {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Search Results Styles */
.search-form {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-form input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.search-summary {
    margin-bottom: 2rem;
    color: var(--text-light);
}

.search-results {
    margin-bottom: 2rem;
}

.search-result {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.search-result h2 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.search-result a {
    color: var(--primary-color);
    text-decoration: none;
}

.result-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Pagination Styles */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
}

.pagination a {
    padding: 0.5rem 1rem;
    background: var(--secondary-color);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.pagination a:hover {
    background: var(--primary-color);
    color: white;
}

/* Footer Styles */
footer {
    background: #222;
    color: #ccc;
    margin-top: 4rem;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

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

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

.footer-section a {
    color: #ccc;
    text-decoration: none;
}

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

.site-stats {
    margin-top: 1rem;
    font-size: 0.9rem;
}

.footer-bottom {
    background: #111;
    padding: 1rem;
    text-align: center;
    font-size: 0.9rem;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.form-group textarea {
    min-height: 200px;
    resize: vertical;
}

.form-error {
    color: #dc3545;
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.form-success {
    color: #28a745;
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* Editor Styles */
.editor-toolbar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    padding: 0.5rem;
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.toolbar-btn {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    background: white;
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.9rem;
}

.toolbar-btn:hover {
    background: var(--secondary-color);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content h2 {
    margin-bottom: 1.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        display: none;
    }
    
    .header-content {
        flex-wrap: wrap;
        padding: 0.5rem;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .search-bar {
        display: none;
    }
    
    .auth-buttons {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
        background: none;
        border: 1px solid var(--primary-color);
        color: var(--primary-color);
        padding: 0.5rem 0.75rem;
        border-radius: 4px;
        font-size: 1.2rem;
    }
    
    .mobile-menu {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        z-index: 999;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }
    
    .mobile-menu.show {
        display: block;
    }
    
    .mobile-menu a {
        display: block;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        color: var(--text-color);
        text-decoration: none;
    }
    
    .mobile-menu a:hover {
        background: var(--secondary-color);
    }
    
    .mobile-menu input {
        width: calc(100% - 2rem);
        margin: 1rem;
        padding: 0.75rem;
        border: 1px solid var(--border-color);
        border-radius: 4px;
    }
    
    .article-title {
        font-size: 2rem;
    }
    
    .article-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 1rem;
    }
    
    .article-title {
        font-size: 1.5rem;
    }
    
    .article-meta {
        font-size: 0.8rem;
    }
    
    .btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
    }
}

/* Print Styles */
@media print {
    header, 
    footer, 
    .sidebar, 
    .auth-buttons, 
    .search-bar,
    .article-meta a {
        display: none;
    }
    
    .container {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        box-shadow: none;
        padding: 0;
    }
    
    .article-content {
        font-size: 12pt;
        line-height: 1.5;
    }
}