/* Reset and Base Styles */
* {
    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;
    display: flex;
    min-height: 100vh;
    background-color: #ffffff;
}

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background-color: #f8f9fa;
    border-right: 1px solid #dee2e6;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    padding: 20px 0;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #ced4da;
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #adb5bd;
}

.site-title {
    font-size: 18px;
    font-weight: 600;
    padding: 0 20px 15px;
    margin-bottom: 15px;
    color: #212529;
    border-bottom: 1px solid #dee2e6;
}

.home-link {
    display: block;
    margin: 0 15px 20px;
    padding: 8px 15px;
    background-color: #ffffff;
    color: #495057;
    text-decoration: none;
    border: 1px solid #dee2e6;
    text-align: center;
    font-size: 14px;
}

.home-link:hover {
    background-color: #e9ecef;
    border-color: #adb5bd;
}

/* Navigation Category Styles */
.nav-category {
    margin-bottom: 2px;
}

.category-toggle {
    width: 100%;
    padding: 10px 20px;
    background: none;
    border: none;
    color: #495057;
    text-align: left;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    position: relative;
}

.category-toggle::after {
    content: '›';
    position: absolute;
    right: 20px;
    transition: transform 0.2s ease;
    font-size: 16px;
}

.category-toggle.active::after {
    transform: rotate(90deg);
}

.category-toggle:hover {
    background-color: #e9ecef;
}

.category-toggle.active {
    color: #212529;
}

/* Navigation Items */
.nav-items {
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: #ffffff;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    display: block !important;
}

.nav-items.open {
    max-height: 2000px;
    border-top: 1px solid #f1f3f5;
    border-bottom: 1px solid #f1f3f5;
}

.nav-link {
    display: block;
    padding: 8px 20px 8px 40px;
    color: #6c757d;
    text-decoration: none;
    font-size: 14px;
}

.nav-link:hover {
    background-color: #f8f9fa;
    color: #212529;
}

.nav-link.active {
    background-color: #e7f1ff;
    color: #0056b3;
    font-weight: 500;
}

/* Main Content Styles */
.content {
    margin-left: 260px;
    flex: 1;
    padding: 40px;
    max-width: 1200px;
}

.content h1 {
    color: #495057;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #dee2e6;
    font-size: 1.5em;
}

.content h2 {
    color: #495057;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.content h3 {
    color: #495057;
    margin-top: 25px;
    margin-bottom: 12px;
}

.content p {
    margin-bottom: 15px;
}

.content ul, .content ol {
    margin-bottom: 15px;
    padding-left: 30px;
}

.content li {
    margin-bottom: 8px;
}

.content code {
    background-color: #f8f9fa;
    padding: 2px 6px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
    color: #e83e8c;
}

.content pre {
    background-color: #f8f9fa;
    padding: 15px;
    border: 1px solid #dee2e6;
    overflow-x: auto;
    margin-bottom: 20px;
}

.content pre code {
    background-color: transparent;
    padding: 0;
    color: #212529;
}

/* Home Page Specific Styles */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.category-card {
    background: #ffffff;
    border: 1px solid #dee2e6;
    padding: 20px;
}

.category-card:hover {
    border-color: #adb5bd;
}

.category-card h3 {
    color: #495057;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1em;
    font-weight: 600;
}

.category-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-card li {
    margin-bottom: 8px;
    font-size: 14px;
}

.category-card a {
    color: #0056b3;
    text-decoration: none;
}

.category-card a:hover {
    color: #004085;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid #dee2e6;
    }
    
    .content {
        margin-left: 0;
        padding: 20px;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
}