/*
Theme Name: NeuralGen
Theme URI: https://www.neuralgen.io/
Author: NeuralGen (Ivan Siyanko)
Author URI: https://www.neuralgen.io/about/
Description: Mobile-first, SEO/AEO/GEO-first theme for NeuralGen — AI visibility agency. Answer-first page architecture (H1 + extractable lead + FAQ schema), llms.txt endpoint, AI-crawler-friendly robots, structured data, zero jQuery.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: neuralgen
Tags: one-column, custom-menu, translation-ready, block-styles
*/

/* ========= Fonts (self-hosted, variable) ========= */
@font-face{
  font-family:'Hanken Grotesk';
  src:url('assets/fonts/hanken-var.woff2') format('woff2');
  font-weight:300 800;font-style:normal;font-display:swap;
}
@font-face{
  font-family:'Hanken Grotesk';
  src:url('assets/fonts/hanken-var-italic.woff2') format('woff2');
  font-weight:300 800;font-style:italic;font-display:swap;
}

/* ========= Tokens ========= */
:root{
  --bg:#F4F4F5;
  --surface:#FFFFFF;
  --ink:#17171B;
  --ink-2:#3F4045;
  --muted:#67696F;
  --line:#E4E4E7;
  --line-2:#D4D4D8;
  --accent:#5B5BF0;
  --grad-warm:linear-gradient(135deg,#FFB36B 0%,#FF7A3D 30%,#FF2E88 70%,#C13AFF 100%);
  --grad-cool:linear-gradient(120deg,#7C5CFF 0%,#5B5BF0 35%,#38BDF8 75%,#7DE2FC 100%);
  --grad-soft:linear-gradient(135deg,#EDE9FE 0%,#E0F2FE 45%,#ECFDF5 100%);
  --font:'Hanken Grotesk',ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --w:1200px;
  --gap:clamp(16px,3vw,28px);
  --pad:clamp(20px,4vw,32px);
  --r:18px;
  --r-lg:26px;
  --shadow:0 1px 2px rgba(23,23,27,.05),0 8px 28px -12px rgba(23,23,27,.14);
}

/* ========= Reset / base (mobile-first) ========= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:1.0625rem;line-height:1.65;
  font-feature-settings:'ss01' on;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
h1,h2,h3,h4{line-height:1.12;letter-spacing:-.02em;font-weight:650;margin:0 0 .5em;text-wrap:balance}
h1{font-size:clamp(2.35rem,7.6vw,4.6rem);letter-spacing:-.03em;font-weight:600}
h2{font-size:clamp(1.55rem,4vw,2.2rem)}
h3{font-size:clamp(1.2rem,3vw,1.45rem)}
p{margin:0 0 1.15em}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}
::selection{background:#CFC8FF;color:#17171B}

.screen-reader-text{position:absolute!important;clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap}
.skip-link{position:absolute;left:8px;top:-60px;z-index:200;background:var(--ink);color:#fff;padding:.6em 1em;border-radius:8px;transition:top .15s}
.skip-link:focus{top:8px}

.wrap{width:min(100% - 2*var(--pad),var(--w));margin-inline:auto}

/* ========= Buttons ========= */
.btn{display:inline-flex;align-items:center;gap:.55em;padding:.85em 1.5em;border-radius:999px;
  background:var(--ink);color:#fff;font-weight:600;font-size:.95rem;letter-spacing:.06em;text-transform:uppercase;
  text-decoration:none;border:1px solid var(--ink);transition:transform .15s ease,background .15s ease;cursor:pointer}
.btn:hover{background:#000;transform:translateY(-1px)}
.btn .arr{font-size:1.05em;line-height:1}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn--ghost:hover{background:var(--surface)}
.btn--light{background:#fff;color:var(--ink);border-color:#fff}
.btn--light:hover{background:#f2f2f2}

/* ========= Header ========= */
.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color .2s}
.site-header.is-scrolled{border-bottom-color:var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.9rem 0}
.brand{display:inline-flex;align-items:center;gap:.5rem;font-weight:750;font-size:1.3rem;letter-spacing:-.02em;text-decoration:none}
.brand .dot{width:.55em;height:.55em;border-radius:50%;background:var(--grad-warm);flex:none}
.nav-desktop{display:none}
.header-cta{display:none}

.nav-toggle{appearance:none;background:var(--ink);color:#fff;border:0;border-radius:999px;
  padding:.65em 1.2em;font:inherit;font-weight:600;font-size:.9rem;letter-spacing:.05em;cursor:pointer;display:inline-flex;align-items:center;gap:.5em}
.nav-toggle .bars{display:inline-block;width:14px;height:10px;position:relative}
.nav-toggle .bars::before,.nav-toggle .bars::after{content:"";position:absolute;left:0;right:0;height:2px;background:#fff;border-radius:2px}
.nav-toggle .bars::before{top:1px}.nav-toggle .bars::after{bottom:1px}

.nav-panel{display:none;position:fixed;inset:0;z-index:150;background:var(--bg);overflow:auto;padding:1rem var(--pad) 3rem}
.nav-panel.is-open{display:block}
.nav-panel .panel-top{display:flex;justify-content:space-between;align-items:center;padding:.4rem 0 1.6rem}
.nav-close{appearance:none;border:1px solid var(--line-2);background:#fff;border-radius:999px;width:44px;height:44px;font-size:1.2rem;cursor:pointer}
.nav-panel ul{list-style:none;margin:0;padding:0}
.nav-panel li{border-top:1px solid var(--line)}
.nav-panel a{display:block;padding:1rem .2rem;font-size:1.35rem;font-weight:600;text-decoration:none;letter-spacing:-.01em}
.nav-panel .panel-cta{margin-top:1.6rem}
.nav-panel .panel-note{color:var(--muted);font-size:.9rem;margin-top:2rem}

@media (min-width:1020px){
  .nav-toggle{display:none}
  .header-cta{display:inline-flex}
  .nav-desktop{display:grid;grid-template-columns:auto auto;gap:.15rem 2.6rem;list-style:none;margin:0;padding:0}
  .nav-desktop a{font-size:.95rem;font-weight:520;color:var(--ink-2);text-decoration:none;line-height:1.75}
  .nav-desktop a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:4px}
  .nav-desktop .is-primary a{font-weight:680;color:var(--ink)}
}

/* ========= Hero (all pages) ========= */
.hero{padding:clamp(2.2rem,6vw,4.5rem) 0 clamp(1.6rem,4vw,3rem)}
.hero .kicker{font-size:.95rem;font-weight:550;color:var(--ink-2);letter-spacing:.01em;margin-bottom:1rem;display:flex;align-items:center;gap:.55em}
.hero .kicker .spark{color:#B9BBC1}
.hero-h1{max-width:19ch}
.hero-row{display:flex;flex-wrap:wrap;align-items:center;gap:1.2rem 2rem;margin-top:1.4rem}
.hero-side{max-width:34ch;color:var(--muted);font-size:1.05rem;line-height:1.5}
.hero-side strong{color:var(--ink)}

/* Lead — the extractable answer block (AEO) */
.page-lead{font-size:clamp(1.08rem,2.4vw,1.25rem);line-height:1.6;color:var(--ink-2);
  max-width:72ch;border-left:3px solid var(--ink);padding-left:1.1em;margin:1.8rem 0 0}
.page-lead a{color:var(--ink)}

/* ========= Front-page pattern cards ========= */
.patterns{padding:clamp(1rem,3vw,2rem) 0 0}
.patterns-grid{display:grid;gap:14px}
.pcard{position:relative;border-radius:var(--r-lg);overflow:hidden;min-height:380px;display:flex;flex-direction:column;justify-content:flex-end;
  color:#fff;text-decoration:none;isolation:isolate;box-shadow:var(--shadow)}
.pcard img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;transition:transform .5s ease}
.pcard:hover img{transform:scale(1.035)}
.pcard::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(10,10,14,0) 45%,rgba(10,10,14,.55) 100%)}
.pcard .num{position:absolute;top:16px;left:16px;border:1px solid rgba(255,255,255,.75);border-radius:999px;
  font-size:.85rem;font-weight:600;padding:.35em .9em;backdrop-filter:blur(4px);background:rgba(255,255,255,.12)}
.pcard .pcard-body{padding:1.4rem 1.3rem}
.pcard h3{color:#fff;font-size:1.35rem;margin-bottom:.35rem}
.pcard p{color:rgba(255,255,255,.92);font-size:.98rem;margin:0;max-width:40ch}
.pcard .chip{display:inline-flex;align-items:center;gap:.5em;margin-top:1rem;border:1px solid rgba(255,255,255,.7);
  border-radius:999px;padding:.55em 1.1em;font-size:.82rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;background:rgba(20,20,25,.25);backdrop-filter:blur(4px)}
.pcard--measure{color:var(--ink)}
.pcard--measure::after{background:linear-gradient(180deg,rgba(255,255,255,0) 40%,rgba(255,255,255,.72) 100%)}
.pcard--measure h3,.pcard--measure p{color:var(--ink)}
.pcard--measure p{color:var(--ink-2)}
.pcard--measure .num{border-color:rgba(23,23,27,.45);background:rgba(255,255,255,.4);color:var(--ink)}
.pcard--measure .chip{border-color:rgba(23,23,27,.5);background:rgba(255,255,255,.55);color:var(--ink)}
/* CSS gradient fallbacks if images missing */
.pcard--measure{background:var(--grad-soft)}
.pcard--fix{background:var(--grad-warm)}
.pcard--prove{background:var(--grad-cool)}
.pcard--prove .stat{font-size:clamp(3rem,9vw,4.6rem);font-weight:700;letter-spacing:-.03em;line-height:1;display:block;margin-bottom:.35rem}
@media (min-width:760px){
  .patterns-grid{grid-template-columns:1fr 1fr;gap:16px}
  .pcard{min-height:430px}
  .pcard--prove{grid-column:1/-1;min-height:340px}
  .pcard--prove .pcard-body{display:flex;align-items:flex-end;gap:2rem;justify-content:space-between}
}
@media (min-width:1020px){
  .patterns-grid{grid-template-columns:0.9fr 0.9fr 1.6fr}
  .pcard--prove{grid-column:auto}
  .pcard--prove .pcard-body{display:block}
}

/* ========= Sections / content ========= */
.section{padding:clamp(2.4rem,6vw,4.5rem) 0}
.section--tight{padding-top:0}
.entry-content{max-width:76ch}
.entry-content>h2{margin-top:2.2em;scroll-margin-top:90px}
.entry-content>h3{margin-top:1.6em;scroll-margin-top:90px}
.entry-content a{color:var(--ink);font-weight:520}
.entry-content ul,.entry-content ol{padding-left:1.3em;margin:0 0 1.2em}
.entry-content li{margin-bottom:.45em}
.entry-content li::marker{color:var(--muted)}
.entry-content blockquote{margin:1.6em 0;padding:1em 1.3em;border-left:3px solid var(--ink);background:var(--surface);border-radius:0 var(--r) var(--r) 0;font-style:italic}
.entry-content code{background:#ECECEE;border-radius:6px;padding:.15em .4em;font-size:.9em}
.entry-content pre{background:#17171B;color:#F4F4F5;padding:1.2em;border-radius:var(--r);overflow:auto;font-size:.9em}
.entry-content pre code{background:none;padding:0;color:inherit}
.entry-content img{border-radius:var(--r);box-shadow:var(--shadow)}

/* standalone CTA link paragraphs -> pill buttons */
.entry-content p>a.cta-inline,
.entry-content a.button,
.entry-content .cta-button>a,
.entry-content p.is-cta>a{display:inline-flex;align-items:center;gap:.5em;padding:.8em 1.4em;border-radius:999px;background:var(--ink);color:#fff;font-weight:600;font-size:.92rem;letter-spacing:.05em;text-transform:uppercase;text-decoration:none;border:1px solid var(--ink)}
.entry-content a.button:hover,
.entry-content .cta-button>a:hover,
.entry-content p.is-cta>a:hover{background:#000}
.entry-content .cta-button{margin:1.6em 0}
/* secondary button variant used in content */
.entry-content a.button--ghost,.entry-content .cta-button>a.secondary{background:transparent;color:var(--ink);border-color:var(--line-2)}

/* tables */
.table-wrap{overflow-x:auto;margin:1.6em 0;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);-webkit-overflow-scrolling:touch}
.entry-content table{border-collapse:collapse;width:100%;min-width:520px;font-size:.95rem;margin:0}
.entry-content th,.entry-content td{text-align:left;padding:.8em 1em;border-bottom:1px solid var(--line)}
.entry-content thead th,.entry-content tr:first-child th{background:#FAFAFB;font-weight:650;white-space:nowrap}
.entry-content tr:last-child td{border-bottom:0}

/* ========= TOC ========= */
.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1.1rem 1.3rem;margin:2rem 0;max-width:76ch}
.toc summary{cursor:pointer;font-weight:650;font-size:.98rem;list-style:none;display:flex;align-items:center;gap:.6em}
.toc summary::-webkit-details-marker{display:none}
.toc summary::after{content:"+";margin-left:auto;font-size:1.2em;color:var(--muted)}
.toc[open] summary::after{content:"–"}
.toc ol{margin:.9rem 0 0;padding-left:1.2em}
.toc li{margin:.3em 0}
.toc a{color:var(--ink-2);text-decoration:none}
.toc a:hover{color:var(--ink);text-decoration:underline}

/* ========= FAQ ========= */
.faq{max-width:76ch;margin-top:3rem}
.faq h2{margin-bottom:1rem}
.faq-item{border-top:1px solid var(--line-2);}
.faq-item:last-child{border-bottom:1px solid var(--line-2)}
.faq-item summary{cursor:pointer;padding:1.05rem .2rem;font-weight:600;font-size:1.05rem;list-style:none;display:flex;gap:1rem;align-items:baseline}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";margin-left:auto;font-weight:400;font-size:1.4em;color:var(--muted);line-height:1}
.faq-item[open] summary::after{content:"–"}
.faq-item .faq-a{padding:0 .2rem 1.2rem;color:var(--ink-2);max-width:70ch}
.faq-item .faq-a p{margin-bottom:.7em}

/* ========= Post meta / byline ========= */
.post-meta{display:flex;flex-wrap:wrap;gap:.4em 1.1em;color:var(--muted);font-size:.92rem;margin-top:1.2rem;align-items:center}
.post-meta .sep{color:var(--line-2)}
.post-meta a{color:var(--ink-2)}
.breadcrumbs{font-size:.88rem;color:var(--muted);margin:1.4rem auto 0;display:flex;flex-wrap:wrap;gap:.4em}
.breadcrumbs a{color:var(--ink-2);text-decoration:none}
.breadcrumbs a:hover{text-decoration:underline}
.breadcrumbs .sep{color:var(--line-2)}

/* ========= Cards (blog / archive / related) ========= */
.post-grid{display:grid;gap:18px;margin-top:2rem}
@media (min-width:640px){.post-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1020px){.post-grid{grid-template-columns:1fr 1fr 1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease;position:relative}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--grad-soft)}
.card-media img{width:100%;height:100%;object-fit:cover}
.card-media--g1{background:var(--grad-soft)}
.card-media--g2{background:var(--grad-warm)}
.card-media--g3{background:var(--grad-cool)}
.card-body{padding:1.3rem 1.3rem 1.5rem;display:flex;flex-direction:column;gap:.55rem;flex:1}
.card h2,.card h3{font-size:1.18rem;margin:0;line-height:1.3;letter-spacing:-.01em}
.card a.card-link{text-decoration:none}
.card a.card-link:hover{text-decoration:underline;text-underline-offset:3px}
.card a.card-link::after{content:"";position:absolute;inset:0}
.card .excerpt{color:var(--muted);font-size:.95rem;margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card .card-meta{margin-top:auto;padding-top:.6rem;color:var(--muted);font-size:.85rem;display:flex;gap:1em}
.card--featured{grid-column:1/-1}
@media (min-width:760px){
  .card--featured{display:grid;grid-template-columns:1.2fr 1fr}
  .card--featured .card-media{aspect-ratio:auto;position:relative;min-height:300px}
  .card--featured .card-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
  .card--featured .card-body{padding:2rem;justify-content:center}
  .card--featured h2{font-size:1.7rem}
}

/* ========= Archive header / pagination ========= */
.archive-head{padding:clamp(2rem,5vw,3.5rem) 0 0}
.archive-head p{color:var(--muted);max-width:60ch}
.pagination{display:flex;gap:.5rem;flex-wrap:wrap;margin:2.5rem 0 0}
.pagination .page-numbers{border:1px solid var(--line-2);border-radius:999px;min-width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 1em;text-decoration:none;font-weight:600;font-size:.92rem;background:var(--surface)}
.pagination .page-numbers.current{background:var(--ink);color:#fff;border-color:var(--ink)}
.pagination .page-numbers:hover:not(.current){border-color:var(--ink)}

/* ========= Author box / related ========= */
.author-box{display:flex;gap:1.1rem;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:1.4rem;margin-top:3rem;max-width:76ch}
.author-box .avatar{border-radius:50%;flex:none;width:64px;height:64px}
.author-box h3{margin-bottom:.2rem;font-size:1.05rem}
.author-box p{color:var(--muted);font-size:.95rem;margin:0}
.related{margin-top:3.5rem}
.related h2{font-size:1.5rem}

/* ========= CTA band ========= */
.cta-band{position:relative;border-radius:var(--r-lg);overflow:hidden;color:#fff;padding:clamp(2.2rem,6vw,3.6rem) var(--pad);margin:3.5rem 0 0;isolation:isolate;text-align:left}
.cta-band img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.cta-band::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(12,10,26,.72),rgba(12,10,26,.28));z-index:-1}
.cta-band h2{color:#fff;max-width:22ch;font-size:clamp(1.7rem,4.5vw,2.5rem)}
.cta-band p{color:rgba(255,255,255,.9);max-width:52ch}
.cta-band{background:var(--grad-cool)}

/* ========= Footer ========= */
.site-footer{background:#151519;color:#C9CAD1;margin-top:clamp(3rem,8vw,5.5rem)}
.footer-in{padding:clamp(2.6rem,7vw,4.5rem) 0 2rem;display:grid;gap:2.4rem}
.footer-brand .brand{color:#fff;font-size:1.35rem}
.footer-brand p{color:#9A9CA6;max-width:34ch;font-size:.95rem;margin:1rem 0 0}
.footer-cols{display:grid;gap:2rem;grid-template-columns:1fr 1fr}
.footer-col h3{color:#fff;font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;font-weight:650;margin-bottom:1rem}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin:.55em 0}
.footer-col a{color:#C9CAD1;text-decoration:none;font-size:.97rem}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-bottom{border-top:1px solid #2A2A31;padding:1.4rem 0 2.2rem;display:flex;flex-wrap:wrap;gap:.8rem 2rem;justify-content:space-between;color:#8B8D97;font-size:.86rem}
.footer-bottom a{color:#8B8D97;text-decoration:none}
.footer-bottom a:hover{color:#fff}
@media (min-width:760px){
  .footer-in{grid-template-columns:1.2fr 2fr}
  .footer-cols{grid-template-columns:repeat(3,1fr)}
}

/* ========= 404 / search ========= */
.page-404{padding:clamp(3rem,10vw,6rem) 0;text-align:left}
.search-form{display:flex;gap:.6rem;max-width:480px;margin-top:1.5rem}
.search-form input[type=search]{flex:1;border:1px solid var(--line-2);border-radius:999px;padding:.8em 1.3em;font:inherit;background:var(--surface)}
.search-form input[type=search]:focus{outline:2px solid var(--accent);outline-offset:2px}

/* ========= Utility ========= */
.section-label{display:inline-flex;align-items:center;gap:.5em;font-size:.85rem;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:1rem}
.section-label::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--grad-warm)}
.updated-note{color:var(--muted);font-size:.88rem}

/* ========= Print ========= */
@media print{
  .site-header,.site-footer,.cta-band,.nav-panel,.pagination{display:none}
  body{background:#fff}
}