/* ============================================================================
   VectorLabel — shared stylesheet for the support docs
   (quickstart.html, guide.html, faq.html, support.html).
   Same design language as index.html. Served same-origin on GitHub Pages, so
   linking it from the docs is safe for the iframe-embed path.
   ============================================================================ */

:root{
  --ink:#0e1116;
  --ink-soft:#3a424e;
  --muted:#5e6672;
  --line:#e6e8ec;
  --bg:#ffffff;
  --bg-soft:#f6f7f9;
  --bg-ink:#0e1116;
  --accent:#2f57ff;
  --accent-soft:#eef1ff;
  --tip:#15803d; --tip-bg:#e9f9ee; --tip-line:#bfead0;
  --note:#2f57ff; --note-bg:#eef1ff; --note-line:#d4ddff;
  --warn:#b45309; --warn-bg:#fff5e8; --warn-line:#f3dcb8;
  --danger:#c8323a;
  --radius:16px;
  --maxw:1180px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
[id]{scroll-margin-top:128px}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:15px;
  padding:12px 20px;border-radius:999px;border:1px solid transparent;cursor:pointer;
  transition:transform .15s ease,background .2s ease,border-color .2s ease;text-decoration:none}
.btn:hover{transform:translateY(-1px);text-decoration:none}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:#000}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink)}
.btn svg{width:17px;height:17px}

/* ---------- Alpha banner ---------- */
.alphabar{background:var(--bg-ink);color:#e7ebf2;font-size:13.5px;text-align:center;padding:10px 18px;line-height:1.4}
.alphabar b{color:#fff;font-weight:700}
.alphabar .pill{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  background:rgba(142,160,255,.16);color:#aeb9ff;padding:2px 9px;border-radius:999px;margin-right:9px;vertical-align:1px}
.alphabar a{color:#aeb9ff;font-weight:600;text-decoration:underline;text-underline-offset:2px}
.alphabar a:hover{color:#fff}

/* ---------- Header / nav ---------- */
header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:62px;gap:18px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:-.02em;font-size:18px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .mark{width:26px;height:26px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{font-size:14.5px;color:var(--ink-soft);font-weight:500}
.nav-links a:hover{color:var(--ink);text-decoration:none}
.nav-links a.active{color:var(--accent)}
.nav-cta .btn{padding:8px 16px;font-size:14px}
.menu-btn{display:none;background:none;border:0;cursor:pointer;padding:10px;margin:-10px -8px -10px 0;line-height:0;color:var(--ink)}

/* ---------- Doc hero / breadcrumb ---------- */
.doc-hero{padding:54px 0 30px;border-bottom:1px solid var(--line);background:var(--bg-soft)}
.breadcrumb{font-size:13.5px;color:var(--muted);margin-bottom:16px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{opacity:.5}
.doc-hero .eyebrow{font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.doc-hero h1{font-size:clamp(30px,4.6vw,46px);letter-spacing:-.02em;line-height:1.08;font-weight:700}
.doc-hero p.sub{font-size:clamp(16px,1.6vw,19px);color:var(--ink-soft);max-width:680px;margin-top:14px}
.doc-hero .meta{font-size:13px;color:var(--muted);margin-top:18px}

/* ---------- Two-column doc layout (sidebar + content) ---------- */
.layout{display:grid;grid-template-columns:248px minmax(0,1fr);gap:48px;align-items:start;padding:44px 0 80px}
.toc{position:sticky;top:92px;align-self:start;max-height:calc(100vh - 110px);overflow:auto;
  font-size:14px;border-right:1px solid var(--line);padding-right:18px}
.toc .toc-title{font-size:11.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.toc ul{list-style:none}
.toc li{margin:0}
.toc a{display:block;padding:6px 10px;border-radius:8px;color:var(--ink-soft);font-weight:500;line-height:1.4}
.toc a:hover{background:var(--bg-soft);color:var(--ink);text-decoration:none}
.toc a.sub{padding-left:22px;font-size:13px;color:var(--muted)}
.toc a.active{background:var(--accent-soft);color:var(--accent)}
.toc .group{margin-top:14px}

/* ---------- Article typography ---------- */
.article{min-width:0;max-width:760px}
.article h2{font-size:26px;letter-spacing:-.02em;font-weight:700;margin:46px 0 14px;padding-top:8px}
.article h2:first-child{margin-top:0}
.article h2.chapter{font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);
  margin:70px 0 4px;padding-top:30px;border-top:2px solid var(--ink)}
.article h2.chapter:first-child{margin-top:0;padding-top:0;border-top:0}
.article h2.chapter + .doc-sec h2{margin-top:18px}
.article h3{font-size:19px;letter-spacing:-.01em;font-weight:700;margin:30px 0 10px}
.article h2 + h3{margin-top:14px}
.article p{margin:0 0 14px;color:var(--ink-soft)}
.article ul,.article ol{margin:0 0 16px;padding-left:22px;color:var(--ink-soft)}
.article li{margin:6px 0}
.article a{font-weight:500}
.article strong{color:var(--ink)}
.article .lead{font-size:18px;color:var(--ink-soft);margin-bottom:24px}
.article hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.article code{font-family:var(--mono);font-size:.88em;background:var(--bg-soft);border:1px solid var(--line);
  padding:1.5px 6px;border-radius:6px;color:var(--ink)}
.article pre{background:#0e1116;color:#e7ebf2;border-radius:12px;padding:16px 18px;overflow:auto;margin:0 0 18px;
  font-family:var(--mono);font-size:13px;line-height:1.6}
.article pre code{background:none;border:0;padding:0;color:inherit;font-size:inherit}
.section-anchor{display:block;height:0}

/* ---------- Steps ---------- */
ol.steps{list-style:none;counter-reset:s;padding:0;margin:18px 0 22px}
ol.steps li{counter-increment:s;position:relative;padding:0 0 16px 44px;color:var(--ink-soft)}
ol.steps li::before{content:counter(s);position:absolute;left:0;top:-2px;width:28px;height:28px;border-radius:50%;
  background:var(--ink);color:#fff;font-size:13.5px;font-weight:700;display:grid;place-items:center}
ol.steps li:not(:last-child)::after{content:"";position:absolute;left:13.5px;top:30px;bottom:2px;width:1.5px;background:var(--line)}
ol.steps li strong{color:var(--ink)}

/* ---------- Callouts ---------- */
.callout{border:1px solid var(--line);border-left-width:4px;border-radius:10px;padding:14px 16px;margin:18px 0;
  font-size:14.5px;color:var(--ink-soft);background:var(--bg-soft)}
.callout .lab{font-weight:700;font-size:12px;letter-spacing:.08em;text-transform:uppercase;display:block;margin-bottom:5px}
.callout p{margin:0 0 8px}.callout p:last-child{margin:0}
.callout.tip{background:var(--tip-bg);border-color:var(--tip-line);border-left-color:var(--tip)}
.callout.tip .lab{color:var(--tip)}
.callout.note{background:var(--note-bg);border-color:var(--note-line);border-left-color:var(--note)}
.callout.note .lab{color:var(--note)}
.callout.warn{background:var(--warn-bg);border-color:var(--warn-line);border-left-color:var(--warn)}
.callout.warn .lab{color:var(--warn)}

/* ---------- Keyboard / path chips ---------- */
kbd{font-family:var(--font);font-size:12.5px;font-weight:600;background:#fff;border:1px solid var(--line);
  border-bottom-width:2px;border-radius:6px;padding:2px 7px;color:var(--ink);white-space:nowrap}
.path{font-family:var(--mono);font-size:13px;background:var(--bg-soft);border:1px solid var(--line);
  padding:2px 7px;border-radius:6px;color:var(--ink-soft)}

/* ---------- Hub cards (support.html) ---------- */
.hub-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:8px 0 10px}
.hub-card{display:block;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;background:#fff;color:inherit;
  transition:transform .18s,box-shadow .18s,border-color .18s}
.hub-card:hover{transform:translateY(-3px);box-shadow:0 22px 44px -28px rgba(14,17,22,.35);border-color:#d7dbe2;text-decoration:none}
.hub-card .ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);margin-bottom:16px}
.hub-card .ico svg{width:23px;height:23px}
.hub-card h3{font-size:19px;letter-spacing:-.01em;margin-bottom:7px;color:var(--ink)}
.hub-card p{font-size:14.5px;color:var(--muted)}
.hub-card .go{margin-top:14px;font-size:14px;font-weight:600;color:var(--accent)}

/* ---------- FAQ ---------- */
.faq-cat{font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);
  margin:38px 0 14px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.faq-cat:first-of-type{margin-top:8px}
details.faq{border:1px solid var(--line);border-radius:12px;margin:10px 0;background:#fff;overflow:hidden}
details.faq[open]{border-color:#d7dbe2;box-shadow:0 14px 30px -24px rgba(14,17,22,.3)}
details.faq summary{list-style:none;cursor:pointer;padding:17px 48px 17px 20px;font-weight:600;font-size:16px;
  color:var(--ink);position:relative;user-select:none}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"";position:absolute;right:20px;top:21px;width:9px;height:9px;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:transform .2s}
details.faq[open] summary::after{transform:rotate(-135deg)}
details.faq summary:hover{color:var(--accent)}
details.faq .faq-body{padding:0 20px 18px;color:var(--ink-soft);font-size:15px}
details.faq .faq-body p{margin:0 0 10px}.details .faq-body p:last-child{margin:0}
details.faq .faq-body code{font-family:var(--mono);font-size:.88em;background:var(--bg-soft);border:1px solid var(--line);padding:1.5px 6px;border-radius:6px}

/* ---------- Search (faq) ---------- */
.faq-search{position:relative;margin:6px 0 26px;max-width:520px}
.faq-search input{width:100%;font:inherit;font-size:15px;padding:13px 16px 13px 42px;border:1px solid var(--line);
  border-radius:12px;background:#fff;color:var(--ink)}
.faq-search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.faq-search svg{position:absolute;left:15px;top:14px;width:18px;height:18px;color:var(--muted)}
.faq-empty{display:none;color:var(--muted);padding:16px 2px}

/* ---------- prev/next + back-to-top ---------- */
.pager{display:flex;justify-content:space-between;gap:14px;margin-top:48px;border-top:1px solid var(--line);padding-top:24px}
.pager a{font-weight:600;font-size:15px}
.pager .nxt{margin-left:auto;text-align:right}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--line);padding:40px 0;margin-top:8px;background:var(--bg-soft)}
.foot{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.foot .brand{font-size:16px}
.foot-links{display:flex;gap:22px;font-size:14px}
.foot-links a{color:var(--muted)}
.foot-links a:hover{color:var(--ink)}
.foot .copy{font-size:13px;color:var(--muted);width:100%}

/* ---------- Responsive ---------- */
@media(max-width:920px){
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(255,255,255,.98);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
    border-bottom:1px solid var(--line);padding:6px 0;box-shadow:0 16px 30px -20px rgba(14,17,22,.4)}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 24px;font-size:15px}
  .menu-btn{display:block}
  .layout{grid-template-columns:1fr;gap:0;padding:28px 0 64px}
  .toc{position:static;max-height:none;overflow:visible;border-right:0;border-bottom:1px solid var(--line);
    padding:0 0 18px;margin-bottom:28px}
  .toc ul{columns:2;column-gap:18px}
  .hub-cards{grid-template-columns:1fr 1fr}
  .article{max-width:none}
}
@media(max-width:560px){
  .toc ul{columns:1}
  .hub-cards{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* ---------- Smart search (support-search.js) ----------
   Shared by guide.html (ranked dropdown over sections) and faq.html (filter +
   auto-open + highlight). The input reuses the .faq-search styles above;
   .doc-search only adjusts placement on the guide page. */
.doc-search{margin:28px 0 -12px}
.vl-results{display:none;position:absolute;top:calc(100% + 8px);left:0;right:0;z-index:60;background:#fff;
  border:1px solid var(--line);border-radius:12px;box-shadow:0 26px 52px -22px rgba(14,17,22,.4);
  max-height:min(430px,62vh);overflow:auto}
.vl-results.open{display:block}
.vl-results a{display:block;padding:11px 14px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none}
.vl-results a:last-child{border-bottom:0}
.vl-results a:hover,.vl-results a.sel{background:var(--bg-soft);text-decoration:none}
.vl-results .r-chap{font-size:10.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.vl-results .r-title{font-weight:600;font-size:14.5px;margin-top:1px}
.vl-results .r-snip{font-size:12.5px;color:var(--muted);line-height:1.5;margin-top:2px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.vl-results .r-none{padding:13px 14px;font-size:13.5px;color:var(--muted)}
mark.vl-mark{background:var(--accent-soft);color:var(--accent);border-radius:3px;padding:0 1px}
.faq-count{font-size:13px;color:var(--muted);margin:-14px 0 16px}
.vl-flash{outline:2px solid var(--accent);outline-offset:8px;border-radius:6px;transition:outline-color .5s ease}
.vl-flash.vl-flash-fade{outline-color:transparent}

/* ---------- Real-app screenshots (PNG figures in website/img/) ----------
   Native windows (the Engine's Preferences etc.) have no HTML front-end to embed
   live, so they're shown as real screenshots of the shipping app. The window
   chrome in the image is the real macOS chrome — nothing extra is drawn. */
.shot-frame{margin:22px 0 8px;text-align:center}
.shot-frame img{display:inline-block;max-width:100%;height:auto;border:1px solid var(--line);
  border-radius:10px;box-shadow:0 18px 40px -24px rgba(14,17,22,.35)}

/* ---------- App windows: framed LIVE embeds of the actual VectorLabel UI ---------- */
.appshot{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;
  box-shadow:0 18px 40px -24px rgba(14,17,22,.35);margin:22px 0 8px}
.appshot .bar{height:32px;display:flex;align-items:center;gap:7px;padding:0 12px;background:#f3f5f9;border-bottom:1px solid var(--line)}
.appshot .tl{width:11px;height:11px;border-radius:50%}
.appshot .tl.r{background:#ff5f57}.appshot .tl.y{background:#febc2e}.appshot .tl.g{background:#28c840}
.appshot .bar b{margin-left:8px;font-size:11.5px;font-weight:600;color:var(--muted)}
.shot-cap{font-size:12.5px;color:var(--muted);margin:0 0 24px;text-align:center}
/* Live app-HTML preview inside an .appshot frame: an <iframe> rendering the REAL
   VectorLabel front-end (website/embeds/). The wrapper sets its height on load. */
.appshot .embed-frame{display:block;width:100%;height:440px;border:0;background:#fff}

/* ---------- Feedback form (feedback.html) ---------- */
.form{margin:8px 0 0;max-width:620px}
.field{margin:0 0 18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin:0 0 7px}
.field label .opt{font-weight:400;color:var(--muted)}
.field input,.field textarea,.field select{width:100%;font:inherit;font-size:15px;color:var(--ink);background:var(--bg);
  border:1px solid var(--line);border-radius:10px;padding:11px 13px;transition:border-color .15s,box-shadow .15s}
.field textarea{resize:vertical;min-height:120px;line-height:1.5}
.field select{appearance:none;-webkit-appearance:none;cursor:pointer;padding-right:38px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235e6672' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.field input::placeholder,.field textarea::placeholder{color:var(--muted);opacity:.7}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:4px}
.form-status{font-size:14px;color:var(--muted)}
.form-status.err{color:var(--danger);font-weight:500}
.form-done{text-align:center;padding:26px 10px}
.form-done .tick{width:54px;height:54px;border-radius:50%;margin:0 auto 16px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--tip) 16%,transparent);color:var(--tip);font-size:28px;font-weight:700}
.form-done h2{font-size:24px;margin-bottom:8px}
.form-done p{max-width:420px;margin:0 auto;color:var(--ink-soft)}