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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f8fafc;
    --sidebar-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

/* Layout Container */
.container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.sidebar-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

.nav-list {
    list-style: none;
    padding: 12px 0;
    overflow-y: auto;
    flex: 1;
}

.nav-item {
    padding: 0 12px;
    margin-bottom: 4px;
}

.nav-link {
    display: block;
    padding: 10px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
}

.nav-link:hover {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

.nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

/* Main Content Area */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 40px 60px;
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
    background-color: white;
    padding: 48px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

/* Markdown Content Styles */
.markdown-content {
    color: var(--text-primary);
}

.markdown-content h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 12px;
}

.markdown-content h2 {
    font-size: 28px;
    font-weight: 600;
    margin-top: 48px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.markdown-content h3 {
    font-size: 22px;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.markdown-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.markdown-content p {
    margin-bottom: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.markdown-content ul,
.markdown-content ol {
    margin-bottom: 16px;
    padding-left: 28px;
}

.markdown-content li {
    margin-bottom: 8px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.markdown-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

.markdown-content a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.markdown-content a:hover {
    border-bottom-color: var(--primary-color);
}

.markdown-content code {
    background-color: #f1f5f9;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    color: #e74c3c;
}

.markdown-content pre {
    background-color: #1e293b;
    border-radius: 6px;
    padding: 20px;
    overflow-x: auto;
    margin: 24px 0;
}

.markdown-content pre code {
    background-color: transparent;
    padding: 0;
    color: #e2e8f0;
    font-size: 14px;
    line-height: 1.5;
}

.markdown-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 16px;
    margin: 24px 0;
    color: var(--text-secondary);
    font-style: italic;
}

.markdown-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 32px 0;
}

.markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

.markdown-content table th,
.markdown-content table td {
    border: 1px solid var(--border-color);
    padding: 12px;
    text-align: left;
}

.markdown-content table th {
    background-color: var(--bg-color);
    font-weight: 600;
}

/* Loading State */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

/* Tracker Link */
.tracker-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 10px 14px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
}

.mobile-menu-toggle:hover {
    background-color: var(--primary-hover);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: -280px;
        height: 100vh;
        transition: left 0.3s ease;
        width: 280px;
    }

    .sidebar.open {
        left: 0;
    }

    .main-content {
        padding: 80px 20px 40px;
        margin-left: 0;
    }

    .content-wrapper {
        padding: 24px;
    }

    .markdown-content h1 {
        font-size: 28px;
    }

    .markdown-content h2 {
        font-size: 24px;
    }

    .markdown-content h3 {
        font-size: 20px;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #cbd5e1;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Print Styles */
@media print {
    .sidebar,
    .mobile-menu-toggle {
        display: none;
    }

    .main-content {
        padding: 0;
    }

    .content-wrapper {
        box-shadow: none;
    }
}