:root {
    --color-bg: #0a0a0b;
    --color-surface: #111113;
    --color-surface-elevated: #18181b;
    --color-border: #27272a;
    --color-border-subtle: #1f1f23;
    --color-text-primary: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-accent: #22c55e;
    --color-accent-muted: rgba(34, 197, 94, 0.15);
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Consolas', monospace;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.docs-layout {
    display: flex;
    min-height: 100vh;
}

.docs-sidebar {
    width: 280px;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border-subtle);
    padding: 24px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.docs-main {
    flex: 1;
    margin-left: 280px;
    padding: 48px 64px;
    max-width: 900px;
}

/* Sidebar */
.sidebar-logo {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
}

.sidebar-logo span {
    color: var(--color-text-muted);
    font-weight: 400;
}

.sidebar-back {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 32px;
}

.sidebar-back:hover {
    color: var(--color-text-secondary);
}

.sidebar-section {
    margin-bottom: 24px;
}

.sidebar-section-title {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 4px;
}

.sidebar-nav a {
    display: block;
    padding: 8px 12px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: 6px;
    transition: all 0.15s;
}

.sidebar-nav a:hover {
    background: var(--color-surface-elevated);
    color: var(--color-text-primary);
}

.sidebar-nav a.active {
    background: var(--color-accent-muted);
    color: var(--color-accent);
}

/* Content */
.docs-content h1 {
    font-size: 2.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    line-height: 1.2;
}

.docs-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-top: 48px;
    margin-bottom: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border-subtle);
}

.docs-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 12px;
}

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

.docs-content .lead {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

.docs-content ul, .docs-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.docs-content li {
    color: var(--color-text-secondary);
    margin-bottom: 8px;
    line-height: 1.6;
}

.docs-content strong {
    color: var(--color-text-primary);
    font-weight: 500;
}

.docs-content a {
    color: var(--color-accent);
    text-decoration: none;
}

.docs-content a:hover {
    text-decoration: underline;
}

/* Code blocks */
.docs-content code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-surface-elevated);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--color-text-primary);
}

.docs-content pre {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 16px 20px;
    overflow-x: auto;
    margin-bottom: 24px;
}

.docs-content pre code {
    background: none;
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Cards */
.docs-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.docs-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 24px;
    text-decoration: none;
    transition: all 0.15s;
}

.docs-card:hover {
    border-color: var(--color-text-muted);
    transform: translateY(-2px);
}

.docs-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0 0 8px 0;
}

.docs-card p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Callouts */
.callout {
    padding: 16px 20px;
    border-radius: 8px;
    margin: 24px 0;
    border-left: 4px solid;
}

.callout-info {
    background: rgba(59, 130, 246, 0.1);
    border-color: #3b82f6;
}

.callout-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--color-warning);
}

.callout-danger {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--color-danger);
}

.callout-success {
    background: var(--color-accent-muted);
    border-color: var(--color-accent);
}

.callout p {
    margin: 0;
    color: var(--color-text-secondary);
}

.callout strong {
    color: var(--color-text-primary);
}

/* Tables */
.docs-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

.docs-content th,
.docs-content td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border-subtle);
}

.docs-content th {
    font-weight: 500;
    color: var(--color-text-primary);
    background: var(--color-surface);
}

.docs-content td {
    color: var(--color-text-secondary);
}

/* Loop diagram */
.loop-flow {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin: 32px 0;
    padding: 24px;
    background: var(--color-surface);
    border-radius: 8px;
}

.loop-step {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    padding: 12px 20px;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
}

.loop-step.human {
    background: var(--color-accent-muted);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.loop-arrow {
    color: var(--color-text-muted);
    font-size: 1.25rem;
}

/* Primitives grid */
.primitives-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.primitive {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 20px;
}

.primitive h4 {
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.primitive p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Scenario cards */
.scenario-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 24px;
    margin: 24px 0;
}

.scenario-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text-primary);
}

.scenario-card .severity {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    margin-left: 8px;
}

.severity-critical {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
}

.severity-high {
    background: rgba(245, 158, 11, 0.2);
    color: var(--color-warning);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.15s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-text-primary);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: #e4e4e7;
    text-decoration: none;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-elevated);
    border-color: var(--color-text-muted);
    text-decoration: none;
}

/* Responsive */
@media (max-width: 1024px) {
    .docs-sidebar {
        width: 240px;
    }

    .docs-main {
        margin-left: 240px;
        padding: 32px 40px;
    }
}

@media (max-width: 768px) {
    .docs-sidebar {
        display: none;
    }

    .docs-main {
        margin-left: 0;
        padding: 24px;
    }

    .docs-content h1 {
        font-size: 1.75rem;
    }

    .loop-flow {
        flex-direction: column;
        align-items: flex-start;
    }

    .loop-arrow {
        transform: rotate(90deg);
    }
}