body {
            font-family: 'Inter', sans-serif;
            background-color: #F0F4F8;
            color: #1E293B;
        }
        .gradient-text {
            background: linear-gradient(90deg, #58508d, #bc5090);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .content {
            background-color: white;
            border-radius: 0.75rem;
            padding: 2rem;
            box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.05);
            margin-top: 0;
        }
        @media (max-width: 640px) {
            .content {
                padding: 1rem;
                margin-top: 0;
                border-radius: 0.5rem;
            }
            .content h1 {
                font-size: 1.75rem;
            }
            .content h2 {
                font-size: 1.5rem;
            }
            .content h3 {
                font-size: 1.25rem;
            }
            .content pre {
                padding: 0.75rem;
                font-size: 0.875rem;
                overflow-x: auto;
            }
            .content table {
                font-size: 0.875rem;
            }
        }
        .content h1 {
            font-size: 2.5rem;
            font-weight: 900;
            margin-bottom: 1rem;
            color: #1E293B;
        }
        .content h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: #1E293B;
            border-bottom: 2px solid #E5E7EB;
            padding-bottom: 0.5rem;
        }
        .content h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
            color: #1E293B;
        }
        .content h4 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 1rem;
            margin-bottom: 0.5rem;
            color: #1E293B;
        }
        .content p {
            margin-bottom: 1rem;
            line-height: 1.7;
        }
        .content ul, .content ol {
            margin-bottom: 1rem;
            padding-left: 2rem;
        }
        .content li {
            margin-bottom: 0.5rem;
            line-height: 1.6;
            list-style: none;
            display: flex;
            align-items: flex-start;
        }
        .content ul li::before {
            content: none;
        }
        .progress-checkbox {
            margin-right: 0.75rem;
            margin-top: 0.25rem;
            width: 1.25rem;
            height: 1.25rem;
            cursor: pointer;
            flex-shrink: 0;
            accent-color: #58508d;
        }
        .progress-checkbox:checked {
            accent-color: #58508d;
        }
        .content code {
            background-color: #F3F4F6;
            padding: 0.2rem 0.4rem;
            border-radius: 0.25rem;
            font-family: 'Courier New', monospace;
            font-size: 0.9em;
        }
        .content pre {
            background-color: #1E293B;
            color: #F0F4F8;
            padding: 1rem;
            border-radius: 0.5rem;
            overflow-x: auto;
            margin-bottom: 1rem;
        }
        .content pre code {
            background-color: transparent;
            padding: 0;
            color: inherit;
        }
        .content blockquote {
            border-left: 4px solid #58508d;
            padding-left: 1rem;
            margin-left: 0;
            margin-bottom: 1rem;
            color: #4B5563;
            font-style: italic;
        }
        .content table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 1rem;
        }
        .content th {
            background-color: #F3F4F6;
            padding: 0.75rem;
            text-align: left;
            font-weight: 600;
            border: 1px solid #E5E7EB;
        }
        .content td {
            padding: 0.75rem;
            border: 1px solid #E5E7EB;
        }
        .content tr:nth-child(even) {
            background-color: #F9FAFB;
        }
        .content a {
            color: #58508d;
            text-decoration: underline;
        }
        .content a:hover {
            color: #bc5090;
        }
        .content hr {
            border: none;
            border-top: 2px solid #E5E7EB;
            margin: 2rem 0;
        }
        .mermaid {
            margin: 2rem 0;
            text-align: center;
            background-color: white;
            padding: 1rem;
            border-radius: 0.5rem;
        }
        .sidebar {
            position: fixed;
            top: 64px;
            left: 0;
            height: calc(100vh - 64px);
            width: 280px;
            background-color: white;
            border-right: 1px solid #E5E7EB;
            overflow-y: auto;
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 40;
            box-shadow: 2px 0 4px rgba(0, 0, 0, 0.05);
        }
        .sidebar.collapsed {
            transform: translateX(-100%);
        }
        @media (min-width: 1025px) {
            .sidebar {
                box-shadow: 2px 0 8px rgba(0, 0, 0, 0.08);
            }
        }
        .sidebar-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
            border-bottom: 2px solid #E5E7EB;
        }
        .sidebar-close {
            background: none;
            border: none;
            cursor: pointer;
            padding: 0.25rem;
            color: #6B7280;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.25rem;
            transition: all 0.2s;
        }
        .sidebar-close:hover {
            background-color: #F3F4F6;
            color: #1E293B;
        }
        .sidebar-toggle {
            background: none;
            border: none;
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 0.375rem;
            color: #6B7280;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
        }
        .sidebar-toggle:hover {
            background-color: #F3F4F6;
            color: #1E293B;
        }
        .sidebar-toggle.mobile {
            display: block;
        }
        .sidebar-toggle.desktop {
            display: none;
        }
        @media (min-width: 768px) {
            .sidebar-toggle.desktop {
                display: block;
            }
            .sidebar-toggle.mobile {
                display: none;
            }
        }
        .sidebar-content {
            padding: 1.5rem;
        }
        .sidebar-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: #1E293B;
            margin: 0;
        }
        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-nav li {
            margin-bottom: 0.5rem;
        }
        .sidebar-nav a {
            display: block;
            padding: 0.5rem 0.75rem;
            color: #4B5563;
            text-decoration: none;
            border-radius: 0.375rem;
            transition: all 0.2s;
            font-size: 0.875rem;
        }
        .sidebar-nav a:hover {
            background-color: #F3F4F6;
            color: #58508d;
        }
        .sidebar-nav a.active {
            background-color: #EEF2FF;
            color: #58508d;
            font-weight: 600;
        }
        .sidebar-nav .level-1 {
            padding-left: 0.75rem;
            font-weight: 600;
            color: #1E293B;
        }
        .sidebar-nav .level-2 {
            padding-left: 1.5rem;
            color: #4B5563;
        }
        .sidebar-nav .level-3 {
            padding-left: 2.25rem;
            color: #6B7280;
            font-size: 0.8125rem;
        }
        .sidebar-nav .level-4 {
            padding-left: 3rem;
            color: #9CA3AF;
            font-size: 0.75rem;
        }
        .main-content {
            transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            padding-left: 0;
        }
        @media (min-width: 1025px) {
            .main-content {
                margin-left: 280px !important;
                max-width: calc(100vw - 280px) !important;
                width: calc(100% - 280px) !important;
            }
            .main-content.sidebar-collapsed {
                margin-left: 0 !important;
                max-width: 100% !important;
                width: 100% !important;
            }
            .main-content.container {
                max-width: calc(100vw - 280px) !important;
            }
            .main-content.sidebar-collapsed.container {
                max-width: 100% !important;
            }
        }
        .main-content.no-sidebar {
            margin-left: 0 !important;
        }
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: 4px 0 12px rgba(0, 0, 0, 0.15);
            }
            .sidebar.expanded {
                transform: translateX(0);
            }
            .sidebar-toggle.mobile {
                display: block;
            }
            .main-content {
                margin-left: 0 !important;
                width: 100% !important;
                max-width: 100% !important;
                padding-left: 0.5rem !important;
                padding-right: 0.5rem !important;
            }
            .sidebar-overlay {
                display: none;
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                bottom: 0;
                background-color: rgba(0, 0, 0, 0.5);
                z-index: 35;
            }
            .sidebar-overlay.active {
                display: block;
            }
        }
        @media (min-width: 1025px) {
            .sidebar-overlay {
                display: none !important;
            }
        }