:root {
    --primary: #1E293B;
    --bg: #F8FAFC;
    --text: #334155;
    --sidebar-bg: #FFFFFF;
    --border: #E2E8F0;
    --accent: #3B82F6;
    --accent-hover: #2563EB;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
    margin-bottom: 2.5rem;
    display: block;
    text-decoration: none;
}

.nav-group {
    margin-bottom: 2rem;
}

.nav-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #94A3B8;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: block;
}

.nav-link {
    display: block;
    padding: 0.5rem 0.75rem;
    color: var(--text);
    text-decoration: none;
    border-radius: 0.375rem;
    font-size: 0.9375rem;
    margin-bottom: 0.25rem;
    transition: all 0.2s;
}

.nav-link:hover {
    background: #F1F5F9;
    color: var(--primary);
}

.nav-link.active {
    background: #F1F5F9;
    color: var(--accent);
    font-weight: 600;
}

/* Main Content Area */
.main-content {
    margin-left: 280px;
    flex: 1;
    padding: 0;
}

header {
    background: #FFFFFF;
    border-bottom: 1px solid var(--border);
    padding: 1rem 3rem;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.btn-primary {
    background: var(--primary);
    color: white;
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 3rem;
}

h1 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-weight: 800;
}

h2 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}

p {
    margin-bottom: 1.25rem;
}

.hero {
    background: white;
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 3rem;
    margin-bottom: 3rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background: white;
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: 0.75rem;
}

.card h3 {
    margin-bottom: 0.75rem;
    color: var(--primary);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: white;
    border-radius: 0.5rem;
    overflow: hidden;
    border: 1px solid var(--border);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: #F1F5F9;
    font-weight: 600;
    color: var(--primary);
}

.code-block {
    background: #1E293B;
    color: #E2E8F0;
    padding: 1.5rem;
    border-radius: 0.5rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    margin: 1.5rem 0;
    overflow-x: auto;
}

footer {
    margin-top: 5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: #64748B;
}

@media (max-width: 1024px) {
    .sidebar {
        display: none;
    }
    .main-content {
        margin-left: 0;
    }
}