/*
Theme Name: AI Visibility Engine Hub
Theme URI: https://citetitan.com
Author: Sage Titans
Description: Lightweight custom theme for the AI Visibility Engine Knowledge Hub, matching the marketing site design.
Version: 1.2
License: Proprietary
Text Domain: aive-hub
*/

/* Google Fonts now loaded non-render-blocking from header.php (preconnect + async) */

:root{
  --bg:#FCFCFD; --surface:#FFFFFF; --ink-panel:#0B1220;
  --text:#0B1220; --text-2:#3A4658; --muted:#5A6472; --muted-2:#8A94A6;
  --on-dark:#EAF0F7; --on-dark-muted:#8B97A8;
  --blue:#1488c4; --blue-bright:#23a9e1; --green:#00B87A; --green-bright:#00E599;
  --line:#E7ECF3; --line-2:#DCE3EC; --line-dark:rgba(255,255,255,.08);
  --display:'Space Grotesk',sans-serif; --body:'Inter',sans-serif; --mono:'JetBrains Mono',monospace;
  --max:1200px; --gutter:56px; --radius:14px; --content:760px; --rail:320px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--body);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;line-height:1.7;}
a{color:var(--blue);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;height:auto;display:block;}
.container{max-width:var(--max);margin:0 auto;padding:0 var(--gutter);}

/* ---------- header (mirrors marketing site) ---------- */
/* border fades in on scroll, clean at the top */
.site-header{position:sticky;top:0;z-index:50;background:rgba(252,252,253,.82);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid transparent;transition:border-color .2s ease;}
.site-header.scrolled{border-bottom-color:var(--line);}
.site-header .bar{display:flex;align-items:center;justify-content:space-between;height:75px;}
.brand{display:flex;align-items:center;gap:11px;}
.brand:hover{text-decoration:none;}
.brand-mark{width:50px;height:50px;flex-shrink:0;display:block;}
.brand-name{font-family:var(--display);font-weight:700;font-size:19px;letter-spacing:2.5px;color:var(--text);line-height:1.12;}
.brand-name small{display:block;font-family:var(--body);font-size:8.5px;font-weight:600;letter-spacing:0.9px;text-transform:uppercase;color:var(--muted-2);line-height:1.35;}
.brand-name small.by{font-weight:500;color:var(--muted);opacity:.85;}
.nav{display:flex;align-items:center;gap:34px;}
.nav a{font-size:14.5px;font-weight:500;color:var(--text-2);}
.nav a:hover{color:var(--text);text-decoration:none;}
.nav a{position:relative;padding-bottom:4px;}
.nav a[aria-current="page"]{color:var(--text);font-weight:600;}
.nav a[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;background:var(--green);}
.nav-cta{display:flex;align-items:center;gap:14px;}
.nav-signin{font-size:14.5px;font-weight:600;color:var(--text);}
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--body);font-weight:600;font-size:15px;border-radius:11px;cursor:pointer;border:none;text-decoration:none;transition:transform .15s,box-shadow .15s;}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--green);color:#fff;padding:11px 20px;box-shadow:0 6px 20px rgba(0,184,122,.28);}
.btn-primary:hover{transform:translateY(-2px);}

/* ---------- hub hero ---------- */
.hub-hero{padding:64px 0 40px;border-bottom:1px solid var(--line);}
.hub-hero .eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.4px;color:var(--blue);border:1px solid rgba(20,136,196,.25);background:rgba(20,136,196,.06);padding:6px 13px;border-radius:100px;margin-bottom:20px;}
.hub-hero h1{font-family:var(--display);font-weight:700;font-size:42px;letter-spacing:-1.4px;line-height:1.1;margin-bottom:14px;max-width:16ch;}
.hub-hero p{font-size:17px;color:var(--muted);max-width:560px;}

/* ---------- post list ---------- */
.hub-main{padding:56px 0 80px;}
.post-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px;}
.post-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s;}
.post-card:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(11,18,32,.08);}
.post-card a{text-decoration:none;color:inherit;}
.post-thumb{aspect-ratio:16/9;background:linear-gradient(135deg,#eef4fb,#e6f0f8);overflow:hidden;}
.post-thumb img{width:100%;height:100%;object-fit:cover;}
.post-body{padding:24px;display:flex;flex-direction:column;flex:1;}
.post-cat{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.5px;text-transform:uppercase;color:var(--blue);margin-bottom:10px;}
.post-title{font-family:var(--display);font-size:20px;font-weight:600;line-height:1.25;margin-bottom:10px;color:var(--text);}
.post-excerpt{font-size:14.5px;color:var(--muted);line-height:1.6;flex:1;}
.post-meta{margin-top:16px;font-size:12.5px;color:var(--muted-2);}

/* ---------- single post body ---------- */
.article-body{max-width:var(--content);margin:40px auto 0;padding:0 var(--gutter) 70px;}
.article-body p,.article-body ul,.article-body ol,.article-body blockquote{font-size:17px;line-height:1.8;color:var(--text-2);margin-bottom:24px;}
.article-body h2{font-family:var(--display);font-size:27px;font-weight:700;letter-spacing:-.5px;margin:44px 0 16px;color:var(--text);scroll-margin-top:100px;}
.article-body h3{font-family:var(--display);font-size:21px;font-weight:600;margin:34px 0 12px;color:var(--text);scroll-margin-top:100px;}
.article-body ul,.article-body ol{padding-left:26px;}
.article-body li{margin-bottom:8px;}
.article-body a{color:var(--blue);text-decoration:underline;}
.article-body blockquote{border-left:3px solid var(--green);padding-left:22px;color:var(--muted);font-style:italic;}
.article-body img{border-radius:var(--radius);margin:10px 0 24px;}
.article-body code{font-family:var(--mono);font-size:14px;background:#f2f6fa;padding:2px 7px;border-radius:5px;}
.article-body pre{background:var(--ink-panel);color:#c9d3e0;padding:20px;border-radius:var(--radius);overflow-x:auto;margin-bottom:24px;}
.article-body pre code{background:none;padding:0;color:inherit;}

/* article footer CTA */
.article-cta{max-width:var(--content);margin:20px auto 90px;padding:0 var(--gutter);}
.article-cta .box{background:var(--ink-panel);border-radius:16px;padding:38px 34px;text-align:center;}
.article-cta h3{font-family:var(--display);color:#fff;font-size:23px;font-weight:700;margin-bottom:10px;}
.article-cta p{color:var(--on-dark-muted);font-size:15px;margin-bottom:22px;}

/* ---------- footer (mirrors marketing site) ---------- */
.site-footer{background:var(--ink-panel);color:var(--on-dark);}
.site-footer .container{padding-top:56px;padding-bottom:34px;}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid var(--line-dark);}
.foot-brand .brand-name{color:#fff;}
.foot-brand p{margin-top:14px;font-size:13.5px;color:var(--on-dark-muted);max-width:280px;}
.foot-col h4{font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--on-dark-muted);margin-bottom:16px;}
.foot-col a{display:block;font-size:14px;color:var(--on-dark);margin-bottom:11px;}
.foot-col a:hover{color:var(--green-bright);text-decoration:none;}
.foot-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:26px;font-size:12.5px;color:var(--on-dark-muted);flex-wrap:wrap;gap:12px;}

/* pagination */
.pagination{margin-top:50px;display:flex;gap:10px;justify-content:center;}
.pagination a,.pagination span{padding:9px 15px;border:1px solid var(--line-2);border-radius:9px;font-size:14px;color:var(--text-2);}
.pagination .current{background:var(--ink-panel);color:#fff;border-color:var(--ink-panel);}

.hamburger{display:none;}
@media (max-width:900px){
  :root{--gutter:24px;}
  .nav{display:none;}
  .nav-cta .nav-signin{display:none;}
  .hub-hero h1{font-size:32px;}
  .post-grid{grid-template-columns:1fr;}
  .foot-top{grid-template-columns:1fr 1fr;gap:30px;}
  .article-body p,.article-body ul,.article-body ol{font-size:16px;}
}
@media (max-width:520px){ .foot-top{grid-template-columns:1fr;} }
@media (prefers-reduced-motion:reduce){ *{animation:none!important;transition:none!important;} }

/* ============================================================
   Enhanced Knowledge Hub landing
   ============================================================ */

/* hero with subtle grid backdrop */
.hub-hero{position:relative;overflow:hidden;padding:72px 0 44px;}
/* hero grid removed: showed through the header and we are not using it */
.hub-hero-bg{display:none;}
.hub-hero .container{position:relative;z-index:1;}
.hub-hero h1{font-size:46px;}

/* featured lead article */
.hub-featured{padding:0 0 10px;}
.feat-card{display:grid;grid-template-columns:1.15fr 1fr;gap:0;background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;text-decoration:none;color:inherit;transition:transform .2s,box-shadow .2s;}
.feat-card:hover{transform:translateY(-3px);box-shadow:0 22px 50px rgba(11,18,32,.10);text-decoration:none;}
.feat-media{position:relative;min-height:340px;background:linear-gradient(135deg,#0b1220,#132338);}
.feat-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;}
.feat-ph{position:absolute;inset:0;background:linear-gradient(135deg,#0b1220,#1b3350);}
.feat-body{padding:40px 38px;display:flex;flex-direction:column;justify-content:center;}
.feat-flag{display:inline-block;align-self:flex-start;font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.6px;text-transform:uppercase;color:#fff;background:var(--green);padding:4px 12px;border-radius:100px;margin-bottom:16px;}
.feat-body .post-cat{font-family:var(--mono);font-size:11px;letter-spacing:.5px;text-transform:uppercase;color:var(--blue);margin-bottom:10px;}
.feat-body h2{font-family:var(--display);font-size:30px;font-weight:700;line-height:1.18;letter-spacing:-.8px;margin-bottom:14px;color:var(--text);}
.feat-body p{font-size:15.5px;color:var(--muted);line-height:1.6;margin-bottom:18px;}
.feat-meta{font-size:13px;color:var(--muted-2);}

/* category pills */
.cat-pills{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px;}
.pill{font-size:13.5px;font-weight:600;padding:8px 16px;border-radius:100px;border:1px solid var(--line-2);color:var(--text-2);background:var(--surface);text-decoration:none;transition:all .15s;}
.pill:hover{border-color:var(--blue);color:var(--blue);text-decoration:none;}
.pill.active{background:var(--ink-panel);color:#fff;border-color:var(--ink-panel);}

/* post grid: make first row feel intentional */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}

/* key takeaways box in articles */
.takeaways{background:linear-gradient(180deg,rgba(0,184,122,.06),rgba(255,255,255,0));border:1px solid rgba(0,184,122,.25);border-radius:14px;padding:24px 26px;margin:0 0 32px;}
.takeaways .tk-label{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:var(--green);margin-bottom:12px;}
.takeaways ul{margin:0;padding-left:20px;}
.takeaways li{font-size:15.5px;line-height:1.6;color:var(--text-2);margin-bottom:8px;}

@media (max-width:900px){
  .hub-hero h1{font-size:32px;}
  .feat-card{grid-template-columns:1fr;}
  .feat-media{min-height:200px;}
  .feat-body{padding:28px 24px;}
  .feat-body h2{font-size:24px;}
  .post-grid{grid-template-columns:1fr;}
}
@media (min-width:901px) and (max-width:1100px){
  .post-grid{grid-template-columns:repeat(2,1fr);}
}

/* ============================================================
   Single article: image-first hero + RIGHT sidebar rail
   ============================================================ */

/* 1. featured image sits above the title, wider than the reading column */
.article-feat{max-width:1000px;margin:30px auto 0;padding:0 var(--gutter);}
.article-feat img{width:100%;border-radius:16px;border:1px solid var(--line);}

/* 2. hero: breadcrumbs left, title + meta centered */
.article-hero{padding:34px 0 8px;}
.crumbs-wrap{max-width:1240px;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:14px;color:var(--muted-2);}
.crumbs a{color:var(--blue);font-weight:500;}
.crumbs .sep{color:var(--line-2);}
.hero-inner{max-width:920px;text-align:center;margin-top:30px;}
.article-hero h1{font-family:var(--display);font-weight:700;font-size:44px;line-height:1.12;letter-spacing:-1.4px;margin-bottom:24px;color:var(--text);}
.article-cat{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.5px;text-transform:uppercase;color:var(--blue);margin-bottom:16px;display:inline-block;}

.article-meta{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:12px 26px;font-size:14.5px;color:var(--muted);}
.article-meta .mt{display:inline-flex;align-items:center;gap:8px;}
.article-meta .mt svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;opacity:.8;flex-shrink:0;}
.article-meta .mt.upd{color:var(--blue);font-weight:600;}

.btn-gpt{display:inline-flex;align-items:center;gap:9px;background:#10A37F;color:#fff;font-weight:600;font-size:14.5px;padding:10px 18px;border-radius:10px;box-shadow:0 6px 18px rgba(16,163,127,.24);transition:transform .15s,box-shadow .15s;}
.btn-gpt:hover{color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:0 10px 24px rgba(16,163,127,.30);}
.btn-gpt svg{width:17px;height:17px;flex-shrink:0;}

/* 3. shell: reading column left, rail on the RIGHT (scrolls with the page) */
.article-shell{max-width:1240px;margin:34px auto 0;padding:0 var(--gutter);display:grid;grid-template-columns:minmax(0,var(--content)) var(--rail);gap:52px;justify-content:center;align-items:stretch;}
.article-shell .article-body{max-width:var(--content);margin:0;padding:0 0 20px;}

.post-rail{position:relative;min-width:0;align-self:stretch;height:100%;}
.rail-inner{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px;}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px;}
.side-title{font-family:var(--display);font-size:16px;font-weight:700;color:var(--text);margin-bottom:15px;display:flex;align-items:center;gap:8px;letter-spacing:-.2px;}
.side-title .flame{font-size:16px;line-height:1;}
.toc-block.is-hidden{display:none;}

/* table of contents */
#tocNav{display:flex;flex-direction:column;gap:2px;}
.toc-a{position:relative;font-size:13px;line-height:1.5;color:var(--muted);padding:7px 0 7px 20px;text-decoration:none;transition:color .15s ease;}
.toc-a::before{content:"";position:absolute;left:5px;top:1.05em;width:6px;height:6px;border-radius:50%;background:var(--line-2);transform:translate(-50%,-50%);transition:width .15s ease,height .15s ease,background-color .15s ease;}
.toc-a:hover{color:var(--text);text-decoration:none;}
.toc-a:hover::before{width:8px;height:8px;background:var(--muted);}
.toc-a.active{color:var(--blue);font-weight:600;}
.toc-a.active::before{width:8px;height:8px;background:var(--blue);}

/* share buttons */
.share-list{display:flex;flex-direction:column;gap:9px;}
.share-btn{display:flex;align-items:center;gap:11px;padding:11px 15px;border-radius:9px;color:#fff;font-size:14px;font-weight:600;line-height:1.2;transition:filter .15s,transform .15s;}
.share-btn:hover{color:#fff;text-decoration:none;filter:brightness(1.07);transform:translateY(-1px);}
.share-btn svg{width:16px;height:16px;fill:currentColor;flex-shrink:0;}
.sh-x{background:#1DA1F2;}
.sh-in{background:#0A66C2;}
.sh-fb{background:#1877F2;}
.sh-cp{background:#6B7280;}

/* trending list */
.trend-list{display:flex;flex-direction:column;}
.trend-item{display:grid;grid-template-columns:82px 1fr;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);color:inherit;align-items:start;}
.trend-item:first-child{padding-top:0;}
.trend-item:last-child{border-bottom:none;padding-bottom:0;}
.trend-item:hover{text-decoration:none;}
.trend-item:hover .trend-title{color:var(--blue);}
.trend-thumb{aspect-ratio:16/10;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#0b1220,#1b3350);}
.trend-thumb img{width:100%;height:100%;object-fit:cover;}
.trend-title{font-size:13.5px;font-weight:600;line-height:1.35;color:var(--text);transition:color .15s;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.trend-meta{margin-top:7px;font-size:11.5px;color:var(--muted-2);display:flex;align-items:center;gap:7px;flex-wrap:wrap;line-height:1.3;}
.trend-meta .tm{display:inline-flex;align-items:center;gap:5px;}
.trend-meta svg{width:12px;height:12px;flex-shrink:0;}

/* read next */
/* when "Read next" follows the CTA, let that section own the spacing instead */
.article-cta:has(+ .read-next){margin-bottom:0;}
.read-next{padding:56px 0 80px;border-top:1px solid var(--line);margin-top:50px;}
.rn-title{font-family:var(--display);font-size:24px;font-weight:700;letter-spacing:-.5px;margin-bottom:28px;}

/* tablet / mobile: rail drops below the article, TOC hidden, share + trending stay */
@media (max-width:1080px){
  .article-shell{grid-template-columns:1fr;max-width:var(--content);gap:0;}
  .post-rail{margin-top:40px;}
  .rail-inner{position:static;top:auto;}
  .toc-block{display:none;}
}
@media (max-width:900px){
  .article-hero{padding-top:26px;}
  .article-hero h1{font-size:30px;}
  .hero-inner{margin-top:22px;text-align:left;}
  .article-meta{justify-content:flex-start;gap:10px 18px;font-size:13.5px;}
  .btn-gpt{width:100%;justify-content:center;margin-top:6px;}
  .article-feat{margin-top:18px;}
}

/* ============================================================
   Mobile nav (hamburger) + responsive hardening
   Added: fixes mobile horizontal overflow, styles article tables,
   and adds the hamburger menu the theme was missing.
   ============================================================ */

/* clip horizontal overflow WITHOUT breaking position:sticky.
   overflow:clip (unlike hidden) does not create a scroll container, so the
   sticky header and the desktop rail keep working. overflow-y stays visible. */
html, body{ overflow-x:clip; }

/* long tokens/URLs in article text should wrap, not widen the page */
.article-body{ overflow-wrap:break-word; }

/* tables in posts: styled + horizontally scrollable on small screens */
.article-body table{ width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;display:block;overflow-x:auto;-webkit-overflow-scrolling:touch; }
.article-body th,.article-body td{ border:1px solid var(--line-2);padding:10px 12px;text-align:left;vertical-align:top; }
.article-body table tr:first-child td,.article-body th{ background:#f3f6f9;font-weight:700; }

/* hamburger button (theme was missing this) */
.hamburger{ width:40px;height:40px;border:1px solid var(--line-2);border-radius:10px;background:var(--surface);cursor:pointer;align-items:center;justify-content:center;padding:0; }
.hamburger span{ display:block;width:18px;height:2px;background:var(--text);position:relative; }
.hamburger span::before,.hamburger span::after{ content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text); }
.hamburger span::before{ top:-6px; } .hamburger span::after{ top:6px; }

/* mobile dropdown menu */
.mobile-nav{ display:none;position:fixed;inset:75px 0 auto 0;background:var(--surface);border-bottom:1px solid var(--line);padding:18px var(--gutter) 26px;z-index:49;flex-direction:column;gap:4px;box-shadow:0 20px 40px rgba(11,18,32,.08); }
.mobile-nav.open{ display:flex; }
.mobile-nav a{ padding:12px 0;font-size:16px;font-weight:500;color:var(--text-2);border-bottom:1px solid var(--line);text-decoration:none; }
.mobile-nav a:hover{ text-decoration:none;color:var(--text); }
.mobile-nav .btn{ margin-top:14px;justify-content:center;color:#fff;border-bottom:none; }

@media (max-width:900px){
  .hamburger{ display:flex; }   /* show it exactly where the desktop nav hides */
}

/* ---- article overflow catch-all (nothing in a post may exceed the column) ---- */
.article-body > *{ max-width:100%; }
.article-body img,.article-body svg,.article-body video,.article-body iframe{ max-width:100%;height:auto; }
.article-body pre{ max-width:100%;overflow-x:auto; }
/* higher specificity so it beats any inline ".article-wrap table" left in the post */
.article-shell .article-body table{ display:block;width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch; }
/* neutralise a leftover wrapper from the original post HTML, if present */
.article-body .article-wrap{ max-width:100%;margin:0;padding:0; }

/* the reading column is a grid item; without min-width:0 it won't shrink below
   its content's min-content, leaving it ~1px wider than the viewport (same bug
   as the marketing grids). this is the real fix for the article overflow. */
.article-shell .article-body{ min-width:0; }

/* ============================================================
   Contrast fixes (WCAG AA >= 4.5:1) — override tokens + specific rules
   ============================================================ */
:root{
  --blue:#0d6293;     /* was #1488c4 (3.9:1) -> 6.6:1 : all blue links, breadcrumbs, labels */
  --muted-2:#6b7280;  /* was #8A94A6 (3.1:1) -> 4.8:1 : meta/date text */
}
.brand-name small{ color:var(--text-2); }               /* AI VISIBILITY ENGINE -> 9.6:1 */
.brand-name small.by{ color:var(--muted); opacity:1; }  /* BY SAGE TITANS -> 6.0:1 */
.btn-primary{ background:#047a4c; }                      /* Start free / CTA : white 5.4:1 */
.btn-gpt{ background:#0b7d5e; }                          /* Summarize in ChatGPT : white 5.1:1 */
.sh-x{ background:#0f1419; }                             /* X/Twitter : white 18.5:1 */
.sh-fb{ background:#0e5fc9; }                            /* Facebook : white 6.0:1 */
.sh-cp{ background:#4b5563; }                            /* Copy link : white 7.6:1 */
/* .sh-in #0A66C2 already passes (5.7:1); LinkedIn left as-is */