/* ============================================
   Design Tokens
   Change a token, change everything.
   Projects override tokens, not rules.
   ============================================ */
:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-muted: #57606a;
    --color-link: #0366d6;
    --color-link-hover: #024ea4;
    --color-border: #d0d7de;
    --color-accent: #0366d6;
    --color-accent-light: #ddf4ff;
    --color-danger: #d1242f;
    --color-success: #1a7f37;

    --font-body: 'Atkinson Hyperlegible', system-ui, -apple-system, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;

    --max-width: 48rem;
    --radius: 6px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 3rem;
}

/* ============================================
   Reset
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-link);
    text-decoration: none;
}
a:hover {
    color: var(--color-link-hover);
}

/* ============================================
   Component: Navbar
   Partial: layouts/_navbar.html.erb
   ============================================ */
.navbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-lg);
}
.navbar-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}
.navbar-brand:hover {
    color: var(--color-text);
}
.navbar-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

/* ============================================
   Component: DocPage
   View: docs/show, docs/index
   ============================================ */
.doc-page {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}
.doc-page h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}
.doc-page h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}
.doc-page h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}
.doc-page p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}
.doc-page ul, .doc-page ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}
.doc-page li {
    margin-bottom: var(--spacing-xs);
}

/* ============================================
   Component: DocIndex
   View: docs/index
   ============================================ */
.doc-index-list {
    list-style: none;
    padding: 0;
}
.doc-index-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-sm);
}
.doc-index-item a {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-text);
    font-weight: 600;
}
.doc-index-item a:hover {
    background: var(--color-accent-light);
}
.doc-index-item .doc-description {
    font-weight: 400;
    color: var(--color-muted);
    font-size: 0.9rem;
}

/* ============================================
   Component: Mermaid diagrams
   ============================================ */
.mermaid {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-align: center;
}

/* ============================================
   Responsive — mobile-first, one breakpoint
   ============================================ */
@media (min-width: 600px) {
    .doc-page h1 {
        font-size: 2.5rem;
    }
}