/* Shared styles for the ENGRAM static site.
   Loaded by index.html (dark landing), docs.html + resources.html (light
   theme). The body[data-theme=...] attribute selects the theme variant. */

:root {
    --accent-primary: #2d7a4f;
    --accent-light-bg: rgba(45, 122, 79, 0.2);
    --accent-light-border: rgba(45, 122, 79, 0.3);

    /* Dark theme (landing) */
    --dark-bg-gradient: linear-gradient(145deg, #1a2e23 0%, #0f1f17 50%, #162a20 100%);
    --dark-text: #fff;
    --dark-text-muted: rgba(255, 255, 255, 0.7);
    --dark-text-faint: rgba(255, 255, 255, 0.5);
    --dark-nav-bg: rgba(15, 31, 23, 0.6);
    --dark-nav-border: rgba(255, 255, 255, 0.08);

    /* Light theme (docs + resources) */
    --light-bg: #fafafa;
    --light-card-bg: #fff;
    --light-text: #1a1a1a;
    --light-text-muted: #4a4a4a;
    --light-text-faint: #7a7a7a;
    --light-border: #e5e5e5;
    --light-code-bg: #f3f3f3;
    --light-nav-bg: rgba(255, 255, 255, 0.95);

    --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, "Cascadia Mono", monospace;
    --font-serif: "Source Serif 4", Charter, Georgia, "Times New Roman", serif;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

/* ─── Top navigation (shared) ──────────────────────────────────────── */

.site-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 28px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    font-family: var(--font-mono);
}

.site-nav .brand-link {
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 1.5px;
    text-decoration: none;
}

.site-nav .nav-links {
    display: flex;
    gap: 22px;
    font-size: 13px;
    letter-spacing: 0.4px;
}

.site-nav .nav-links a {
    text-decoration: none;
    padding: 4px 0;
    border-bottom: 1.5px solid transparent;
    transition: border-color 120ms ease, color 120ms ease;
}

/* Dark-theme nav (landing page) */
body[data-theme="dark"] {
    background: var(--dark-bg-gradient);
    min-height: 100vh;
    color: var(--dark-text);
    font-family: var(--font-sans);
}
body[data-theme="dark"] .site-nav {
    background: var(--dark-nav-bg);
    border-bottom: 1px solid var(--dark-nav-border);
}
body[data-theme="dark"] .site-nav .brand-link { color: var(--dark-text); }
body[data-theme="dark"] .site-nav .nav-links a { color: var(--dark-text-muted); }
body[data-theme="dark"] .site-nav .nav-links a:hover { color: var(--dark-text); }
body[data-theme="dark"] .site-nav .nav-links a.active {
    color: var(--dark-text);
    border-bottom-color: var(--accent-primary);
}

/* Light-theme nav (docs + resources) */
body[data-theme="light"] {
    background: var(--light-bg);
    min-height: 100vh;
    color: var(--light-text);
    font-family: var(--font-serif);
    line-height: 1.65;
}
body[data-theme="light"] .site-nav {
    background: var(--light-nav-bg);
    border-bottom: 1px solid var(--light-border);
}
body[data-theme="light"] .site-nav .brand-link { color: var(--light-text); }
body[data-theme="light"] .site-nav .nav-links a { color: var(--light-text-muted); }
body[data-theme="light"] .site-nav .nav-links a:hover { color: var(--light-text); }
body[data-theme="light"] .site-nav .nav-links a.active {
    color: var(--light-text);
    border-bottom-color: var(--accent-primary);
}

/* ─── Light-theme content (docs + resources) ──────────────────────── */

.page-content {
    max-width: 820px;
    margin: 0 auto;
    padding: 48px 28px 96px;
}

.page-content h1 {
    font-family: var(--font-sans);
    font-size: 32px;
    font-weight: 600;
    letter-spacing: -0.3px;
    margin: 0 0 8px;
    color: var(--light-text);
}

.page-content .page-subtitle {
    color: var(--light-text-faint);
    font-size: 15px;
    font-family: var(--font-sans);
    margin: 0 0 36px;
}

.page-content h2 {
    font-family: var(--font-sans);
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.2px;
    margin: 48px 0 12px;
    color: var(--light-text);
    border-top: 1px solid var(--light-border);
    padding-top: 32px;
}

.page-content h2:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

.page-content h3 {
    font-family: var(--font-sans);
    font-size: 17px;
    font-weight: 600;
    margin: 32px 0 10px;
    color: var(--light-text);
}

.page-content h4 {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin: 24px 0 6px;
    color: var(--light-text-muted);
}

.page-content p {
    margin: 0 0 14px;
    font-size: 16px;
}

.page-content ul, .page-content ol {
    margin: 6px 0 16px;
    padding-left: 24px;
}

.page-content li { margin: 4px 0; font-size: 16px; }

.page-content a {
    color: var(--accent-primary);
    text-decoration: none;
    border-bottom: 1px solid rgba(45, 122, 79, 0.25);
    transition: border-color 120ms ease;
}
.page-content a:hover { border-bottom-color: var(--accent-primary); }

.page-content code {
    font-family: var(--font-mono);
    font-size: 13px;
    background: var(--light-code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--light-text);
}

.page-content pre {
    font-family: var(--font-mono);
    font-size: 12.5px;
    line-height: 1.55;
    background: var(--light-code-bg);
    padding: 14px 16px;
    border-radius: 6px;
    border: 1px solid var(--light-border);
    overflow-x: auto;
    margin: 12px 0 18px;
}

.page-content pre code {
    background: none;
    padding: 0;
    font-size: inherit;
}

.page-content .callout {
    margin: 16px 0;
    padding: 12px 16px;
    border-left: 3px solid var(--accent-primary);
    background: rgba(45, 122, 79, 0.05);
    border-radius: 0 6px 6px 0;
    font-size: 14.5px;
    color: var(--light-text-muted);
}

.page-content .callout strong { color: var(--light-text); }

/* ─── In-page TOC (docs) ──────────────────────────────────────────── */

.toc {
    margin: 0 0 36px;
    padding: 16px 18px;
    background: var(--light-card-bg);
    border: 1px solid var(--light-border);
    border-radius: 8px;
    font-family: var(--font-sans);
}

.toc-label {
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 11px;
    color: var(--light-text-faint);
    font-weight: 600;
    margin-bottom: 8px;
}

.toc ol {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: section;
}

.toc > ol > li {
    counter-increment: section;
    font-size: 14px;
    font-weight: 600;
    margin: 6px 0;
}

.toc > ol > li::before {
    content: counter(section) ". ";
    color: var(--light-text-faint);
    margin-right: 4px;
    font-weight: 500;
}

.toc ol ol {
    counter-reset: subsection;
    margin: 4px 0 8px 12px;
    padding: 0;
}

.toc ol ol li {
    counter-increment: subsection;
    font-size: 13px;
    font-weight: 400;
    color: var(--light-text-muted);
    margin: 2px 0;
}

.toc ol ol li::before {
    content: counter(section) "." counter(subsection) " ";
    color: var(--light-text-faint);
    margin-right: 4px;
}

.toc a {
    color: inherit;
    text-decoration: none;
    border-bottom: none;
}
.toc a:hover { color: var(--accent-primary); }

/* ─── MCP tool cards (docs §1.2) ─────────────────────────────────── */

.tool {
    margin: 14px 0;
    padding: 14px 16px;
    background: var(--light-card-bg);
    border: 1px solid var(--light-border);
    border-radius: 6px;
    font-family: var(--font-sans);
}

.tool-name {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 6px;
}

.tool-summary {
    font-size: 14.5px;
    color: var(--light-text);
    margin-bottom: 8px;
    font-family: var(--font-serif);
}

.tool-detail {
    font-size: 13px;
    color: var(--light-text-muted);
    line-height: 1.55;
}

.tool-detail .label {
    font-weight: 600;
    color: var(--light-text);
}

.tool-group-title {
    font-family: var(--font-sans);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--light-text-faint);
    margin: 28px 0 4px;
    font-weight: 600;
}

/* ─── Screenshots (docs §2 Settings panel) ───────────────────────── */

.screenshot {
    margin: 14px 0 24px;
    text-align: center;
}

.screenshot img {
    max-width: 460px;
    width: 100%;
    height: auto;
    border: 1px solid var(--light-border);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

.screenshot figcaption {
    font-family: var(--font-sans);
    font-size: 12px;
    color: var(--light-text-faint);
    margin-top: 8px;
    font-style: italic;
}

/* ─── Resource cards (resources page) ────────────────────────────── */

.resource-card {
    display: block;
    background: var(--light-card-bg);
    border: 1px solid var(--light-border);
    border-radius: 8px;
    padding: 20px 22px;
    margin: 14px 0;
    text-decoration: none !important;
    color: inherit !important;
    transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}

.resource-card:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
    border-color: rgba(45, 122, 79, 0.4);
}

.resource-card .card-title {
    font-family: var(--font-sans);
    font-size: 17px;
    font-weight: 600;
    color: var(--light-text);
    margin: 0 0 6px;
}

.resource-card .card-summary {
    font-family: var(--font-serif);
    font-size: 14.5px;
    color: var(--light-text-muted);
    margin: 0 0 8px;
    line-height: 1.55;
}

.resource-card .card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.4px;
    color: var(--light-text-faint);
}

.resource-card .card-arrow {
    color: var(--accent-primary);
}

.resources-intro {
    color: var(--light-text-muted);
    font-size: 16px;
    margin: 0 0 28px;
}

/* ─── Mobile ──────────────────────────────────────────────────────── */

@media (max-width: 640px) {
    .site-nav { padding: 12px 18px; }
    .site-nav .nav-links { gap: 14px; font-size: 12px; }
    .site-nav .brand-link { font-size: 13px; letter-spacing: 1px; }
    .page-content { padding: 32px 18px 64px; }
    .page-content h1 { font-size: 26px; }
    .page-content h2 { font-size: 19px; }
    .page-content h3 { font-size: 16px; }
    .screenshot img { max-width: 100%; }
}