:root {
    --bg-color: #0f172a;
    --text-color: #e2e8f0;
    --primary-color: #38bdf8;
    --secondary-color: #818cf8;
    --accent-color: #f472b6;
    --sidebar-bg: #1e293b;
    --card-bg: #1e293b;
    --border-color: #334155;
    --code-bg: #0f172a;
    --nav-height: 60px;
    --sidebar-width: 280px;
}

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

body {
    font-family: 'Outfit', 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    display: block;
    font-weight: 500;
}

.nav-links a:hover, .nav-links a.active {
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--primary-color);
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 3rem 4rem;
    max-width: 1200px;
}

h1, h2, h3, h4, h5, h6 {
    color: #fff;
    margin-bottom: 1rem;
    line-height: 1.3;
}

h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: 2rem;
    margin-top: 3rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    color: var(--secondary-color);
}

p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: #cbd5e1;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-color);
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.card-stack {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin: 2rem 0;
}

.card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.card h3 {
    margin-top: 0;
}

/* Code Blocks */
pre {
    border-radius: 0.75rem;
    margin: 1.5rem 0 !important;
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

code {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
}

:not(pre) > code {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    color: var(--accent-color);
}

/* Mermaid Diagrams */
.mermaid {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    margin: 2rem 0;
    text-align: center;
}

/* Mobile Toggle */
.menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 200;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
}

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

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 2rem;
    }

    .menu-toggle {
        display: block;
    }
    
    h1 {
        font-size: 2.5rem;
    }
}