:root {
    --bg-color: #0d1117;
    --sidebar-bg: #161b22;
    --accent-color: #7d5fff;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --border-color: #30363d;
    --glass-bg: rgba(22, 27, 34, 0.8);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar Styling */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 10;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h1 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-color);
}

.file-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.file-item {
    padding: 12px;
    margin-bottom: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    color: var(--text-secondary);
}

.file-item:hover {
    background-color: rgba(125, 95, 255, 0.1);
    color: var(--text-primary);
}

.file-item.active {
    background-color: var(--accent-color);
    color: white;
}

.file-item i {
    margin-right: 12px;
}

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: radial-gradient(circle at top right, rgba(125, 95, 255, 0.05), transparent);
}

.content-header {
    padding: 16px 40px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
}

.file-path {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

#markdown-body {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
    line-height: 1.6;
}

/* Markdown Rendering Styles */
.markdown-container {
    max-width: 800px;
    margin: 0 auto;
}

.markdown-container h1, .markdown-container h2, .markdown-container h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.markdown-container h1 { border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; }

.markdown-container p { margin-bottom: 1rem; }

.markdown-container code {
    background-color: rgba(110, 118, 129, 0.4);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.markdown-container pre {
    background-color: #161b22;
    padding: 16px;
    border-radius: 12px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.markdown-container blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 16px;
    color: var(--text-secondary);
    margin: 1.5rem 0;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

#markdown-body.fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}