/* === Project Native AI — Documentation Lab === */
:root {
    --ai-violet: #7c3aed;
    --ai-violet-light: #a78bfa;
    --ai-violet-dim: rgba(124,58,237,.08);
    --ai-violet-glow: rgba(124,58,237,.15);
    --ai-dark: #1e1b4b;
    --ai-charcoal: #312e81;
    --ai-bg: #ffffff;
    --ai-bg-alt: #f8f7ff;
    --ai-bg-code: #f1f0fb;
    --ai-text: #374151;
    --ai-text-light: #6b7280;
    --ai-text-bright: #111827;
    --ai-border: #e5e4f0;
    --ai-white: #ffffff;
    --ai-mono: 'JetBrains Mono','Fira Code','SF Mono',monospace;
}
html { font-size: 15px; scroll-behavior: smooth; }
body { font-family: 'Space Grotesk',-apple-system,sans-serif; color: var(--ai-text); background: var(--ai-bg); line-height: 1.85; margin: 0; }
h1,h2,h3,h4 { font-weight: 700; color: var(--ai-text-bright); }
a { color: var(--ai-violet); text-decoration: none; }
a:hover { color: var(--ai-violet-light); }
code,kbd,.mono { font-family: var(--ai-mono); }
.btn:focus,.form-control:focus,.form-select:focus { box-shadow: 0 0 0 .2rem var(--ai-violet-dim); border-color: var(--ai-violet); }

/* ====== TWO-TIER HEADER ====== */
/* Tier 1: Main nav */
.ai-header { background: var(--ai-dark); }
.ai-header-main { display: flex; align-items: center; justify-content: space-between; padding: .75rem 2rem; }
.ai-header-brand { color: var(--ai-white); font-weight: 700; font-size: 1.05rem; display: flex; align-items: center; gap: .5rem; }
.ai-header-brand code { background: var(--ai-violet); color: var(--ai-white); padding: .15rem .5rem; border-radius: 4px; font-size: .7rem; font-weight: 700; letter-spacing: .05em; }
.ai-header-links { display: flex; gap: .3rem; list-style: none; margin: 0; padding: 0; }
.ai-header-links a { color: rgba(255,255,255,.6); font-size: .82rem; font-weight: 500; padding: .35rem .8rem; border-radius: 6px; transition: all .2s; }
.ai-header-links a:hover,.ai-header-links a.active { color: var(--ai-white); background: rgba(255,255,255,.08); }
/* Tier 2: Sub-bar / breadcrumb */
.ai-subbar { background: var(--ai-charcoal); padding: .4rem 2rem; display: flex; align-items: center; justify-content: space-between; font-size: .72rem; }
.ai-breadcrumb { color: rgba(255,255,255,.4); }
.ai-breadcrumb a { color: rgba(255,255,255,.55); }
.ai-breadcrumb a:hover { color: var(--ai-violet-light); }
.ai-breadcrumb span { margin: 0 .4rem; color: rgba(255,255,255,.25); }
.ai-subbar-right { color: rgba(255,255,255,.35); font-family: var(--ai-mono); font-size: .65rem; }

/* ====== BUTTONS ====== */
.btn-ai { background: var(--ai-violet); color: var(--ai-white); font-weight: 600; border: none; padding: .7rem 2rem; border-radius: 8px; font-size: .85rem; transition: all .3s; }
.btn-ai:hover { background: var(--ai-violet-light); color: var(--ai-white); transform: translateY(-1px); box-shadow: 0 6px 20px var(--ai-violet-glow); }
.btn-ai-outline { border: 1.5px solid var(--ai-violet); color: var(--ai-violet); background: transparent; font-weight: 600; padding: .7rem 2rem; border-radius: 8px; font-size: .85rem; }
.btn-ai-outline:hover { background: var(--ai-violet); color: var(--ai-white); }

/* ====== HERO (asymmetric, monospace accents) ====== */
.ai-hero { padding: 5rem 2rem 4rem; max-width: 900px; margin: 0 auto; }
.ai-hero-version { display: inline-block; font-family: var(--ai-mono); font-size: .65rem; color: var(--ai-violet); background: var(--ai-violet-dim); padding: .25rem .8rem; border-radius: 20px; margin-bottom: 1.5rem; letter-spacing: .04em; }
.ai-hero h1 { font-size: 2.6rem; line-height: 1.2; margin-bottom: 1.5rem; }
@media (min-width: 768px) { .ai-hero h1 { font-size: 3.2rem; } }
.ai-hero h1 code { font-family: var(--ai-mono); background: linear-gradient(135deg, var(--ai-violet), var(--ai-violet-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-size: inherit; }
.ai-hero-desc { font-size: 1.05rem; color: var(--ai-text-light); max-width: 600px; margin-bottom: 2rem; }
.ai-hero-actions { display: flex; gap: .8rem; flex-wrap: wrap; align-items: center; }
.ai-hero-hint { font-family: var(--ai-mono); font-size: .7rem; color: var(--ai-text-light); margin-left: .5rem; }

/* ====== PAGE WITH SIDEBAR TOC ====== */
.ai-page-with-toc { display: grid; grid-template-columns: 220px 1fr; gap: 0; max-width: 1100px; margin: 0 auto; min-height: 70vh; }
.ai-toc { position: sticky; top: 0; height: fit-content; max-height: 100vh; overflow-y: auto; padding: 2rem 1.5rem 2rem 2rem; border-right: 1px solid var(--ai-border); }
.ai-toc-title { font-family: var(--ai-mono); font-size: .6rem; font-weight: 700; color: var(--ai-text-light); letter-spacing: .2em; text-transform: uppercase; margin-bottom: .8rem; }
.ai-toc-list { list-style: none; padding: 0; margin: 0; }
.ai-toc-list li { margin-bottom: .15rem; }
.ai-toc-list a { display: block; padding: .3rem .6rem; font-size: .78rem; color: var(--ai-text-light); border-left: 2px solid transparent; border-radius: 0 4px 4px 0; transition: all .2s; }
.ai-toc-list a:hover,.ai-toc-list a.active { color: var(--ai-violet); background: var(--ai-violet-dim); border-left-color: var(--ai-violet); }
.ai-toc-list a.sub { padding-left: 1.2rem; font-size: .72rem; }
.ai-page-body { padding: 2.5rem 2.5rem 4rem; }
@media (max-width: 767px) {
    .ai-page-with-toc { grid-template-columns: 1fr; }
    .ai-toc { position: relative; border-right: none; border-bottom: 1px solid var(--ai-border); padding: 1.5rem; }
}

/* ====== SECTION ANCHORS ====== */
.ai-section-anchor { scroll-margin-top: 1rem; }
.ai-section-anchor h2 { font-size: 1.3rem; margin-bottom: .5rem; padding-bottom: .5rem; border-bottom: 1px solid var(--ai-border); }
.ai-section-anchor h3 { font-size: 1.05rem; margin-top: 1.8rem; margin-bottom: .5rem; }
.ai-section-anchor p { color: var(--ai-text); }
.ai-section-anchor + .ai-section-anchor { margin-top: 3rem; }

/* ====== CODE BLOCK ====== */
.ai-code-block { background: var(--ai-bg-code); border: 1px solid var(--ai-border); border-radius: 8px; padding: 1.2rem 1.5rem; font-family: var(--ai-mono); font-size: .78rem; color: var(--ai-text-bright); overflow-x: auto; margin: 1rem 0; line-height: 1.7; }
.ai-code-block .comment { color: var(--ai-text-light); }
.ai-code-block .keyword { color: var(--ai-violet); font-weight: 600; }

/* ====== TABLE FORMAT ====== */
.ai-table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: .88rem; }
.ai-table th { text-align: left; padding: .7rem 1rem; background: var(--ai-bg-alt); color: var(--ai-violet); font-family: var(--ai-mono); font-size: .72rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; border-bottom: 2px solid var(--ai-border); }
.ai-table td { padding: .7rem 1rem; border-bottom: 1px solid var(--ai-border); }
.ai-table tr:hover td { background: var(--ai-violet-dim); }
.ai-table .ai-tag { display: inline-block; font-family: var(--ai-mono); font-size: .62rem; background: var(--ai-violet-dim); color: var(--ai-violet); padding: .15rem .5rem; border-radius: 4px; font-weight: 600; }

/* ====== SPEC CARDS (horizontal, not grid) ====== */
.ai-spec-row { display: flex; gap: 1rem; margin: 1.5rem 0; flex-wrap: wrap; }
.ai-spec-item { flex: 1; min-width: 200px; background: var(--ai-bg-alt); border: 1px solid var(--ai-border); border-radius: 8px; padding: 1.2rem; }
.ai-spec-label { font-family: var(--ai-mono); font-size: .6rem; font-weight: 700; color: var(--ai-text-light); letter-spacing: .15em; text-transform: uppercase; margin-bottom: .4rem; }
.ai-spec-value { font-size: 1.6rem; font-weight: 700; color: var(--ai-violet); line-height: 1.2; }
.ai-spec-desc { font-size: .78rem; color: var(--ai-text-light); margin-top: .3rem; }

/* ====== INLINE CALLOUT ====== */
.ai-callout { border-left: 3px solid var(--ai-violet); background: var(--ai-violet-dim); padding: 1rem 1.5rem; border-radius: 0 8px 8px 0; margin: 1.5rem 0; font-size: .88rem; }
.ai-callout strong { color: var(--ai-violet); }

/* ====== CENTERED PAGE (no TOC) ====== */
.ai-centered-page { max-width: 680px; margin: 0 auto; padding: 3rem 1.5rem 4rem; }
.ai-centered-page h1 { font-size: 1.8rem; margin-bottom: .3rem; }
.ai-page-meta { font-family: var(--ai-mono); font-size: .65rem; color: var(--ai-text-light); margin-bottom: 2.5rem; }

/* ====== CONTACT (label-left form) ====== */
.ai-form-row { display: grid; grid-template-columns: 140px 1fr; gap: .5rem 1rem; align-items: start; margin-bottom: 1rem; }
.ai-form-row label { font-family: var(--ai-mono); font-size: .75rem; font-weight: 600; color: var(--ai-text-bright); padding-top: .7rem; text-align: right; }
.ai-form-row .form-control,.ai-form-row .form-select { border-color: var(--ai-border); border-radius: 6px; padding: .65rem .9rem; font-size: .88rem; }
.ai-form-row .form-control::placeholder { color: #c4c0d8; }
@media (max-width: 575px) { .ai-form-row { grid-template-columns: 1fr; } .ai-form-row label { text-align: left; padding-top: 0; } }

/* ====== PROSE ====== */
.ai-prose h3 { font-size: 1rem; margin-top: 2rem; margin-bottom: .5rem; }
.ai-prose p { line-height: 2; }
.ai-prose ul { padding-left: 1.2rem; }
.ai-prose ul li { margin-bottom: .3rem; line-height: 2; }

/* ====== COMPACT 2-COL FOOTER ====== */
.ai-footer { background: var(--ai-dark); color: rgba(255,255,255,.4); padding: 2rem 2rem 1rem; }
.ai-footer-inner { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.ai-footer-left { }
.ai-footer-brand { color: var(--ai-white); font-weight: 700; font-size: .9rem; margin-bottom: .4rem; display: flex; align-items: center; gap: .4rem; }
.ai-footer-brand code { background: var(--ai-violet); color: var(--ai-white); padding: .1rem .4rem; border-radius: 3px; font-size: .55rem; font-weight: 700; }
.ai-footer-desc { font-size: .75rem; max-width: 300px; }
.ai-footer-right { display: flex; gap: 3rem; justify-content: flex-end; }
.ai-footer-col { }
.ai-footer-heading { font-family: var(--ai-mono); font-size: .6rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--ai-violet-light); margin-bottom: .5rem; }
.ai-footer-links { list-style: none; padding: 0; margin: 0; }
.ai-footer-links li { margin-bottom: .15rem; }
.ai-footer-links a { color: rgba(255,255,255,.4); font-size: .78rem; }
.ai-footer-links a:hover { color: var(--ai-violet-light); }
.ai-footer-copy { max-width: 1100px; margin: 1.5rem auto 0; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.06); font-size: .65rem; color: rgba(255,255,255,.2); text-align: center; }
@media (max-width: 575px) { .ai-footer-inner { grid-template-columns: 1fr; } .ai-footer-right { justify-content: flex-start; } }

/* ====== DIVIDER ====== */
.ai-divider { border: none; border-top: 1px solid var(--ai-border); margin: 3rem 0; }

/* ====== MEMBER GRID ====== */
.ai-member-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: .6rem; margin: 1rem 0; }
.ai-member-card { background: var(--ai-bg-alt); border: 1px solid var(--ai-border); border-radius: 6px; padding: .8rem 1rem; transition: border-color .2s; }
.ai-member-card:hover { border-color: var(--ai-violet-light); }
.ai-member-name { font-weight: 600; font-size: .85rem; color: var(--ai-text-bright); }
.ai-member-role { font-family: var(--ai-mono); font-size: .65rem; color: var(--ai-text-light); margin-top: .15rem; }

/* ====== NEWSLETTER / CTA ====== */
.ai-cta-bar { background: var(--ai-bg-alt); border-top: 1px solid var(--ai-border); border-bottom: 1px solid var(--ai-border); padding: 3rem 2rem; text-align: center; }
.ai-cta-bar h2 { font-size: 1.3rem; margin-bottom: .5rem; }
.ai-cta-bar p { color: var(--ai-text-light); margin-bottom: 1.5rem; font-size: .9rem; }