:root {
    --sidebar-width: 300px;
    --header-height: 60px;
    --primary-color: #0366d6;
    --background-color: #ffffff;
    --text-color: #24292e;
    --sidebar-background: #f6f8fa;
    --border-color: #e1e4e8;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--background-color);
    border-bottom: 1px solid var(--border-color);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    z-index: 100;
}

.project-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--sidebar-background);
    border-right: 1px solid var(--border-color);
    padding: 2rem;
    overflow-y: auto;
}

.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    padding: 2rem;
    max-width: 900px;
}

.main-content h1 {
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.main-content h2 {
    margin: 2rem 0 1rem;
}

.main-content p {
    margin-bottom: 1rem;
}

.main-content pre {
    margin: 1rem 0;
    padding: 1rem;
    background-color: var(--sidebar-background);
    border-radius: 6px;
    overflow-x: auto;
}

/* Navigation styles */
.nav-list {
    list-style: none;
}

.nav-list li {
    margin-bottom: 0.5rem;
}

.nav-list a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
}

.nav-list a:hover {
    color: var(--primary-color);
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .main-content {
        margin-left: 0;
    }

    .sidebar.active {
        transform: translateX(0);
    }
    
    .menu-toggle {
        display: block;
    }
}