:root {
    --primary-color: #0078d4;
    --text-color: #333;
    --bg-color: #fff;
    --sidebar-bg: #f3f2f1;
    --border-color: #e1dfdd;
    --code-bg: #f4f4f4;
    --hover-color: #e1e1e1;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100%;
}

.sidebar {
    width: 300px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    margin: 0 0 1rem 0;
    font-size: 1.2rem;
}

#package-search {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.package-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 0;
}

.package-tree, .tree-children {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.tree-children {
    padding-left: 1.2rem;
    display: none;
}

.tree-node.expanded > .tree-children {
    display: block;
}

.node-content {
    display: flex;
    align-items: center;
    padding: 2px 0;
    cursor: default;
}

.tree-toggle {
    display: inline-block;
    width: 1.5rem;
    text-align: center;
    cursor: pointer;
    user-select: none;
    color: #666;
    font-size: 0.8rem;
}

.tree-toggle:hover {
    color: var(--text-color);
}

.node-label {
    flex: 1;
    padding: 2px 4px;
    border-radius: 3px;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.node-label.is-package {
    cursor: pointer;
}

.node-label.is-package:hover {
    background-color: var(--hover-color);
}

.node-label.active {
    background-color: #e5f1fb;
    color: var(--primary-color);
    font-weight: 500;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.content-wrapper {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.markdown-body {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    max-width: 1000px;
}

.toc-sidebar {
    width: 250px;
    padding: 2rem 1rem;
    border-left: 1px solid var(--border-color);
    overflow-y: auto;
    font-size: 0.85rem;
    display: none;
}

.toc-sidebar h3 {
    margin-top: 0;
    font-size: 1rem;
    color: #666;
}

.toc-link {
    display: block;
    padding: 0.25rem 0;
    color: #666;
    text-decoration: none;
}

.toc-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.markdown-body h1 { border-bottom: 1px solid var(--border-color); padding-bottom: 0.3em; }
.markdown-body h2 { border-bottom: 1px solid var(--border-color); padding-bottom: 0.3em; margin-top: 1.5em; }
.markdown-body code {
    background-color: var(--code-bg);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    font-size: 85%;
}
.markdown-body pre {
    background-color: var(--code-bg);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
}
.markdown-body pre code {
    background-color: transparent;
    padding: 0;
    font-size: 100%;
}
.markdown-body blockquote {
    margin: 0;
    padding: 0 1em;
    color: #6a737d;
    border-left: 0.25em solid #dfe2e5;
}
.markdown-body ul, .markdown-body ol {
    padding-left: 2em;
}
.markdown-body a {
    color: var(--primary-color);
    text-decoration: none;
}
.markdown-body a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: 200px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .toc-sidebar {
        display: none !important;
    }
}