/*
Theme Name: AI Publisher
Theme URI: https://example.com
Author: AI Publishing Platform
Description: A clean, professional editorial theme — Indigo Slate palette, Plus Jakarta Sans typography, responsive card grid, mobile navigation, and a sticky table-of-contents sidebar for long-form guides.
Version: 1.2.0
Text Domain: aipublisher
*/

/* ============================ Design tokens ============================ */
:root{
  --bg:#ffffff;
  --bg-subtle:#f6f8fb;
  --surface:#ffffff;
  --text:#0d1526;
  --text-muted:#556070;
  --text-faint:#8a94a3;
  --border:#e7ebf1;
  --accent:#4f46e5;
  --accent-2:#4338ca;
  --accent-soft:#eef1fe;
  --navy:#0d1526;
  --radius-lg:18px;
  --radius:13px;
  --radius-sm:9px;
  --shadow-sm:0 1px 2px rgba(13,21,38,.04), 0 1px 3px rgba(13,21,38,.03);
  --shadow-md:0 10px 28px -14px rgba(13,21,38,.16);
  --shadow-lg:0 24px 56px -24px rgba(13,21,38,.22);
  --container:1140px;
  --font-sans:"Plus Jakarta Sans","Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-serif:"Newsreader",Georgia,"Times New Roman",serif;
}

/* ============================ Base ============================ */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--text);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:64px 0}
.eyebrow{font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}

/* ============================ Header ============================ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
}
.site-header__inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px}
.brand__mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:grid;place-items:center;color:#fff;font-weight:800;font-size:1.05rem;
  box-shadow:0 6px 16px -6px rgba(79,70,229,.6);
}
.brand__name{font-weight:800;font-size:1.12rem;letter-spacing:-.02em}
.brand__name span{color:var(--accent)}
.nav{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.nav li{list-style:none;margin:0;display:inline-flex;align-items:center}
.nav a{
  padding:8px 14px;border-radius:9px;font-size:.94rem;font-weight:500;color:var(--text-muted);
  transition:background .15s,color .15s;
}
.nav a:hover{background:var(--accent-soft);color:var(--accent)}

/* ============================ Nav container + mobile hamburger ============================ */
.site-nav{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;background:var(--surface);border:1px solid var(--border);border-radius:10px;width:44px;height:44px;cursor:pointer;padding:0}
.nav-toggle span{display:block;width:20px;height:2px;margin:4px auto;background:var(--text);border-radius:2px;transition:transform .2s,opacity .2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media (max-width:760px){
  .nav-toggle{display:block}
  .site-header__inner{position:relative}
  .site-nav{
    position:absolute;top:calc(100% + 1px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:6px;
    background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);
    padding:14px 20px 20px;box-shadow:var(--shadow-md);display:none;z-index:60;
  }
  .site-nav.is-open{display:flex}
  .site-nav .nav{flex-direction:column;align-items:stretch;gap:2px}
  .site-nav .nav li{width:100%}
  .site-nav .nav a{display:block;padding:12px;font-size:1rem}
  .site-search input,.site-search input:focus{width:100%}
}

/* ============================ Hero ============================ */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(60% 120% at 15% 0%, rgba(124,58,237,.10), transparent 60%),
    radial-gradient(50% 120% at 90% 10%, rgba(79,70,229,.12), transparent 55%),
    var(--bg-subtle);
  border-bottom:1px solid var(--border);
}
.hero__inner{padding:76px 24px 68px;text-align:center;max-width:820px;margin:0 auto}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;font-size:.82rem;font-weight:600;
  color:var(--accent);background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-sm);
}
.badge .dot{width:7px;height:7px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 3px rgba(34,197,94,.18)}
.hero__title{
  margin:22px 0 0;font-size:clamp(2.2rem,5vw,3.5rem);line-height:1.05;
  font-weight:800;letter-spacing:-.03em;
}
.hero__subtitle{margin:18px auto 0;max-width:620px;font-size:1.16rem;color:var(--text-muted)}

/* ============================ Featured ============================ */
.feature{
  display:grid;grid-template-columns:1.1fr .9fr;gap:0;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-md);transition:transform .2s,box-shadow .2s;
  margin-bottom:56px;
}
.feature:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.feature__media{position:relative;min-height:340px}
.feature__body{padding:40px}
.feature__body .post-title{font-size:1.9rem;line-height:1.15;margin:14px 0 14px}
.feature__body .excerpt{font-size:1.06rem;color:var(--text-muted)}

/* ============================ Section head ============================ */
.section__head{display:flex;align-items:end;justify-content:space-between;margin-bottom:26px}
.section__title{font-size:1.6rem;font-weight:800;letter-spacing:-.02em;margin:0}
.section__link{font-weight:600;color:var(--accent);font-size:.95rem}

/* ============================ Card grid ============================ */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s,border-color .2s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#dfe2ea}
.card__body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.card .post-title{font-size:1.18rem;line-height:1.32;margin:0}
.card .excerpt{color:var(--text-muted);font-size:.96rem;margin:0}
.card__meta{margin-top:auto}

/* ============================ Thumbnails ============================ */
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-subtle)}
.thumb__img{width:100%;height:100%;object-fit:cover}
.thumb--ph{
  background-image:linear-gradient(135deg,var(--g1,#6366f1),var(--g2,#8b5cf6));
  display:grid;place-items:center;
}
.thumb--ph::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(120% 120% at 100% 0,rgba(255,255,255,.28),transparent 45%);
}
.thumb__mono{
  position:relative;z-index:1;color:#fff;font-weight:800;
  font-size:2.4rem;opacity:.92;text-shadow:0 2px 10px rgba(0,0,0,.15);
}
.feature__media.thumb--ph .thumb__mono{font-size:4rem}

/* ============================ Meta / pills ============================ */
.pill{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:999px;font-size:.72rem;font-weight:700;
  letter-spacing:.03em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);
}
.thumb .pill{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.92);box-shadow:var(--shadow-sm)}
.meta{display:flex;align-items:center;gap:10px;color:var(--text-faint);font-size:.85rem}
.meta .sep{width:3px;height:3px;border-radius:50%;background:currentColor;opacity:.6}

/* ============================ Pagination ============================ */
.pagination{margin-top:48px;display:flex;justify-content:center}
.pagination .nav-links{display:flex;gap:8px;flex-wrap:wrap}
.pagination .page-numbers{
  min-width:42px;height:42px;padding:0 12px;display:grid;place-items:center;
  border:1px solid var(--border);border-radius:11px;font-weight:600;color:var(--text-muted);
  background:#fff;transition:all .15s;
}
.pagination .page-numbers:hover{border-color:var(--accent);color:var(--accent)}
.pagination .page-numbers.current{background:var(--accent);border-color:var(--accent);color:#fff}

/* ============================ Single article ============================ */
.article-hero{
  background:
    radial-gradient(60% 120% at 20% 0%, rgba(124,58,237,.10), transparent 60%),
    var(--bg-subtle);
  border-bottom:1px solid var(--border);
}
.article-hero__inner{max-width:760px;margin:0 auto;padding:56px 24px 40px;text-align:center}
.article-hero h1{font-size:clamp(1.9rem,4vw,2.9rem);line-height:1.12;letter-spacing:-.03em;margin:16px 0}
.article-hero .meta{justify-content:center;margin-top:6px}
.article-banner{max-width:960px;margin:-28px auto 0;padding:0 24px}
.article-banner .thumb{border-radius:var(--radius-lg);box-shadow:var(--shadow-md);aspect-ratio:21/9}

.article{max-width:720px;margin:0 auto;padding:48px 24px 8px}
.article-body{font-family:var(--font-serif);font-size:1.18rem;line-height:1.8;color:#1f2733}
.article-body h2{font-family:var(--font-sans);font-size:1.62rem;font-weight:800;letter-spacing:-.02em;margin:2.2em 0 .6em;line-height:1.25}
.article-body h3{font-family:var(--font-sans);font-size:1.28rem;font-weight:700;margin:1.8em 0 .5em}
.article-body p{margin:0 0 1.25em}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.article-body ul,.article-body ol{margin:0 0 1.25em;padding-left:1.4em}
.article-body li{margin:.4em 0}
.article-body img{border-radius:var(--radius);margin:1.6em 0;box-shadow:var(--shadow-sm)}
.article-body blockquote{
  margin:1.6em 0;padding:.4em 1.2em;border-left:4px solid var(--accent);
  color:var(--text-muted);font-style:italic;background:var(--accent-soft);border-radius:0 10px 10px 0;
}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.8em 0;font-family:var(--font-sans);font-size:.98rem;
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
}
.article-body th{background:var(--bg-subtle);text-align:left;font-weight:700}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--border)}
.article-body tr:last-child td{border-bottom:0}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;
  background:var(--bg-subtle);padding:.15em .4em;border-radius:6px;border:1px solid var(--border);
}
.article-body pre{background:#0f172a;color:#e2e8f0;padding:18px;border-radius:var(--radius);overflow:auto;font-size:.92rem}
.article-body pre code{background:none;border:0;color:inherit;padding:0}
.article-footer{max-width:720px;margin:0 auto;padding:24px}

/* ============================ Single layout + sticky ToC rail ============================ */
.single-layout{max-width:1080px;margin:0 auto;padding:0 24px}
.toc-rail{display:none}
.toc--inline{display:block}
/* Desktop: article + sticky table-of-contents sidebar */
@media (min-width:1180px){
  .single-layout.has-toc{
    display:grid;grid-template-columns:minmax(0,720px) 264px;gap:44px;
    justify-content:center;align-items:start;padding:0 24px;
  }
  .single-layout.has-toc .single-main{min-width:0}
  .single-layout.has-toc .single-main .article,
  .single-layout.has-toc .single-main .article-aside,
  .single-layout.has-toc .single-main .article-footer{max-width:none;margin-left:0;margin-right:0}
  .single-layout.has-toc .toc--inline{display:none}
  .single-layout.has-toc .toc-rail{display:block}
  .toc-rail .toc--rail{
    position:sticky;top:88px;margin:48px 0 0;
    max-height:calc(100vh - 110px);overflow:auto;
  }
}
/* Active section highlight (scroll-spy) */
.toc__item.is-active>a{color:var(--accent);font-weight:600}
.toc--rail .toc__item{border-left:2px solid transparent;padding-left:12px;margin-left:-2px;transition:border-color .15s}
.toc--rail .toc__item.is-active{border-left-color:var(--accent)}

/* ============================ Footer ============================ */
.site-footer{margin-top:72px;background:#0f1420;color:#c7cdda}
.site-footer__inner{
  display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;padding:40px 24px;
}
.site-footer .brand__name{color:#fff}
.site-footer .brand__name span{color:#a5b4fc}
.site-footer .tagline{color:#8b93a6;font-size:.92rem;margin-top:6px}
.site-footer .foot-links{display:flex;gap:20px;flex-wrap:wrap}
.site-footer .foot-links a{color:#c7cdda;font-size:.92rem;transition:color .15s}
.site-footer .foot-links a:hover{color:#fff}
.site-footer__bottom{border-top:1px solid rgba(255,255,255,.08);padding:16px 24px;text-align:center;color:#7b8397;font-size:.85rem}

/* ============================ Empty state ============================ */
.empty{text-align:center;padding:80px 24px;color:var(--text-muted)}
.empty h2{color:var(--text);font-size:1.4rem;margin-bottom:8px}

/* ============================ Header actions / search ============================ */
.site-header__actions{display:flex;align-items:center;gap:14px}
.site-search input{
  height:38px;width:180px;padding:0 14px;border:1px solid var(--border);border-radius:10px;
  background:var(--bg-subtle);font-size:.92rem;font-family:inherit;color:var(--text);transition:width .2s,border-color .15s;
}
.site-search input:focus{outline:none;border-color:var(--accent);background:#fff;width:220px}

/* ============================ Reading progress ============================ */
.reading-progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-2));z-index:60;transition:width .1s linear}

/* ============================ Breadcrumbs ============================ */
.crumbs{display:flex;align-items:center;gap:8px;justify-content:center;font-size:.85rem;color:var(--text-faint);margin-bottom:6px;flex-wrap:wrap}
.crumbs a{color:var(--text-muted)}
.crumbs a:hover{color:var(--accent)}
.crumbs__sep{opacity:.5}
.crumbs__current{color:var(--text-faint)}

/* ============================ Table of contents ============================ */
.toc{
  background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px 24px;margin:0 0 34px;
}
.toc__title{font-family:var(--font-sans);font-size:.8rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);margin-bottom:12px}
.toc__list{list-style:none;margin:0;padding:0;counter-reset:toc}
.toc__item{margin:7px 0}
.toc__item a{font-family:var(--font-sans);font-size:.98rem;color:var(--text-muted);transition:color .15s}
.toc__item a:hover{color:var(--accent)}
.toc__item--l3{padding-left:18px;font-size:.92rem}
.toc__item--l3 a{color:var(--text-faint)}

/* ============================ Author box ============================ */
.author-box{
  display:flex;gap:18px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;margin:8px 0 28px;box-shadow:var(--shadow-sm);
}
.author-box__img{border-radius:50%;width:56px;height:56px}
.author-box__avatar img{border-radius:50%}
.author-box__eyebrow{font-size:.75rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}
.author-box__name{font-family:var(--font-sans);font-weight:800;font-size:1.1rem;margin:2px 0 6px}
.author-box__bio{font-family:var(--font-sans);font-size:.95rem;color:var(--text-muted);margin:0;line-height:1.6}

/* ============================ Newsletter CTA ============================ */
.article-aside{max-width:720px;margin:0 auto;padding:0 24px}
.newsletter{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));border-radius:var(--radius-lg);
  padding:28px 30px;color:#fff;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;margin:8px 0 24px;
}
.newsletter__title{font-family:var(--font-sans);font-size:1.25rem;font-weight:800;letter-spacing:-.01em}
.newsletter__sub{margin:6px 0 0;opacity:.9;font-size:.95rem;font-family:var(--font-sans)}
.newsletter__form{display:flex;gap:8px;flex:0 0 auto}
.newsletter__form input{height:44px;padding:0 16px;border:0;border-radius:10px;font-size:.95rem;font-family:inherit;min-width:220px}
.newsletter__form button{height:44px;padding:0 20px;border:0;border-radius:10px;background:#0f1420;color:#fff;font-weight:700;font-family:inherit;cursor:pointer;transition:transform .12s}
.newsletter__form button:hover{transform:translateY(-1px)}

/* ============================ Ad slot ============================ */
.ad-slot{
  max-width:720px;margin:26px auto;min-height:110px;display:grid;place-items:center;
  border:1px dashed var(--border);border-radius:var(--radius);background:var(--bg-subtle);
}
.ad-slot span{font-size:.72rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--text-faint)}

/* ============================ Related posts ============================ */
.related{background:var(--bg-subtle);border-top:1px solid var(--border);padding:56px 0;margin-top:56px}

/* ============================ Disclosure / updated note ============================ */
.article .disclosure{
  display:flex;align-items:center;gap:9px;font-family:var(--font-sans);font-size:.82rem;color:var(--text-faint);
  background:var(--bg-subtle);border:1px solid var(--border);border-radius:10px;padding:10px 14px;margin:0 0 26px;
}
.article .disclosure .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 auto}
.updated-note{color:var(--accent);font-weight:600}
.article-hero__meta{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap}

/* ============================ 404 ============================ */
.notfound-search{display:flex;gap:8px;max-width:440px;margin:24px auto 0}
.notfound-search input{flex:1;height:46px;padding:0 16px;border:1px solid var(--border);border-radius:11px;font-size:1rem;font-family:inherit;background:#fff}
.notfound-search button{height:46px;padding:0 22px;border:0;border-radius:11px;background:var(--accent);color:#fff;font-weight:700;font-family:inherit;cursor:pointer}

/* ============================ Sources list ============================ */
.article-body .sources-list{font-family:var(--font-sans);font-size:.95rem;padding-left:1.2em}
.article-body .sources-list li{margin:.5em 0;word-break:break-word}
.article-body .sources-list .src-domain{color:var(--text-faint);font-size:.88rem}

/* ============================ Responsive ============================ */
@media (max-width:960px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .feature{grid-template-columns:1fr}
  .feature__media{min-height:220px;aspect-ratio:16/9}
}
@media (max-width:640px){
  .grid{grid-template-columns:1fr}
  .section{padding:44px 0}
  .feature__body{padding:26px}
  .hero__inner{padding:52px 20px 44px}
  .article-body{font-size:1.08rem}
  .article-body table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
}