/* ============================================================
   NEURA DIGITAL SOLUTIONS — NEURA INSIGHTS
   Shared stylesheet for the hub page, article template and every
   published article. Keep this file identical across all of them —
   it's what lets a new article go live without redesigning anything.
   ============================================================ */

*, *::before, *::after{ box-sizing:border-box; }

:root{
  --obsidian:#07090a;
  --obsidian-soft:#0b0f0e;
  --surface:#101514;
  --surface-2:#151b1a;
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(255,255,255,.16);
  --mint:#49e6a0;
  --mint-2:#8ff2c4;
  --mint-dim:rgba(73,230,160,.14);
  --mint-glow:rgba(73,230,160,.35);
  --text:#f4f7f6;
  --text-dim:#aab5b1;
  --text-faint:#77827e;
  --radius-lg:26px;
  --radius-md:16px;
  --radius-sm:10px;
  --ease:cubic-bezier(.16,.84,.44,1);
  --container:1220px;
  --header-h:78px;
}

html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--obsidian);
  color:var(--text);
  font-family:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

h1,h2,h3,h4{
  font-family:'Space Grotesk', 'Inter', sans-serif;
  font-weight:600;
  line-height:1.15;
  margin:0;
  letter-spacing:-0.01em;
}
p{ margin:0; }
ul{ margin:0; padding:0; list-style:none; }
a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
button{ font-family:inherit; cursor:pointer; }

.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}
section{ position:relative; scroll-margin-top:var(--header-h); }

.skip-link{
  position:absolute; left:-999px; top:auto;
  background:var(--mint); color:#04140d;
  padding:12px 20px; border-radius:0 0 10px 0;
  font-weight:600; z-index:1000;
}
.skip-link:focus{ left:0; top:0; }

.bg-grid{
  position:fixed; inset:0; z-index:-2;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}

/* ============================= NAV (shared with main site) ============================= */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:500;
  height:var(--header-h);
  display:flex; align-items:center;
  background:rgba(7,9,10,.55);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:border-color .35s var(--ease), background .35s var(--ease);
}
.nav.is-scrolled{ background:rgba(7,9,10,.82); border-bottom-color:var(--border); }
.nav-inner{ width:100%; display:flex; align-items:center; justify-content:space-between; gap:24px; }
.brand{ display:flex; align-items:center; gap:10px; min-width:0; }
.brand-logo{ height:44px; width:auto; flex-shrink:0; }
.brand-suffix{
  font-family:'Space Grotesk', sans-serif; font-weight:600; font-size:.78rem;
  letter-spacing:.22em; color:var(--mint-2); white-space:nowrap; padding-top:2px;
}
.nav-links{ display:flex; align-items:center; gap:32px; }
.nav-links a{ font-size:.94rem; font-weight:500; color:var(--text-dim); position:relative; padding:6px 0; white-space:nowrap; transition:color .25s var(--ease); }
.nav-links a::after{ content:''; position:absolute; left:0; bottom:0; width:0; height:1px; background:var(--mint); transition:width .3s var(--ease); }
.nav-links a:hover{ color:var(--text); }
.nav-links a:hover::after{ width:100%; }
.nav-links a.is-active{ color:var(--mint-2); }
.nav-links a.is-active::after{ width:100%; }
.nav-actions{ display:flex; align-items:center; gap:18px; }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-weight:600; font-size:.95rem; border-radius:999px; border:1px solid transparent;
  padding:14px 26px; white-space:nowrap;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
  will-change:transform;
}
.btn:active{ transform:scale(.97); }
.btn-primary{
  background:linear-gradient(135deg, var(--mint-2), var(--mint));
  color:#062b1b;
  box-shadow:0 1px 0 rgba(255,255,255,.25) inset, 0 8px 24px -8px var(--mint-glow);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 1px 0 rgba(255,255,255,.3) inset, 0 14px 34px -8px var(--mint-glow); }
.btn-ghost{ background:transparent; border-color:var(--border-strong); color:var(--text); }
.btn-ghost:hover{ border-color:var(--mint); color:var(--mint-2); transform:translateY(-2px); }
.btn-block{ width:100%; }
.btn-sm{ padding:11px 20px; font-size:.88rem; }
.nav-cta{ display:inline-flex; }

.nav-toggle{
  display:none; flex-direction:column; gap:5px; width:38px; height:38px;
  align-items:center; justify-content:center; background:transparent;
  border:1px solid var(--border-strong); border-radius:10px;
}
.nav-toggle span{ width:18px; height:1.6px; background:var(--text); border-radius:2px; transition:transform .3s var(--ease), opacity .3s var(--ease); }
.nav-toggle.is-open span:nth-child(1){ transform:translateY(6.6px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity:0; }
.nav-toggle.is-open span:nth-child(3){ transform:translateY(-6.6px) rotate(-45deg); }

.mobile-panel{
  position:fixed; top:var(--header-h); left:0; right:0; bottom:0;
  background:rgba(7,9,10,.98); backdrop-filter:blur(10px); z-index:499;
  padding:36px 32px; display:flex; flex-direction:column; gap:28px;
  transform:translateY(-12px); opacity:0; visibility:hidden; pointer-events:none;
  transition:opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
}
.mobile-panel.is-open{ opacity:1; transform:translateY(0); visibility:visible; pointer-events:auto; }
.mobile-panel a{ font-family:'Space Grotesk', sans-serif; font-size:1.5rem; font-weight:600; color:var(--text); }
.mobile-panel .btn{ margin-top:8px; }

/* ============================= SECTION HEADERS ============================= */
.section-pad{ padding:120px 0; }
.section-head{ max-width:680px; margin:0 0 64px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.tag{ display:inline-block; font-size:.76rem; font-weight:700; letter-spacing:.16em; text-transform:uppercase; color:var(--mint); margin-bottom:16px; }
.section-head h1, .section-head h2{ font-size:clamp(1.9rem, 3vw, 2.6rem); color:var(--text); }
.section-head p{ margin-top:16px; font-size:1.05rem; color:var(--text-dim); line-height:1.7; }

/* ============================= HUB HEADER ============================= */
.hub-header{ padding:calc(var(--header-h) + 72px) 0 0; }

/* ============================= CATEGORY PILLS ============================= */
.insights-categories{ display:flex; flex-wrap:wrap; justify-content:center; gap:10px; margin-bottom:48px; }
.category-pill{
  font-size:.82rem; font-weight:600; padding:9px 18px; border-radius:999px;
  border:1px solid var(--border-strong); background:var(--surface); color:var(--text-dim);
  transition:border-color .25s var(--ease), color .25s var(--ease), background .25s var(--ease);
}
.category-pill:hover{ border-color:var(--mint); color:var(--mint-2); }
.category-pill.is-active{ border-color:var(--mint); color:var(--mint-2); background:var(--mint-dim); }

/* ============================= ARTICLE CARDS ============================= */
.insights-grid{ display:grid; grid-template-columns:repeat(3, 1fr); gap:28px; }
.article-card{
  display:flex; flex-direction:column;
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-lg);
  overflow:hidden;
  transition:transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.article-card:hover{ transform:translateY(-6px); border-color:var(--border-strong); box-shadow:0 24px 50px -20px rgba(0,0,0,.6); }
.article-cover{
  height:160px; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg, var(--mint-dim), var(--obsidian-soft));
  border-bottom:1px solid var(--border);
}
.article-cover svg{ width:38px; height:38px; color:var(--mint); }
.article-body{ padding:26px 26px 28px; display:flex; flex-direction:column; flex:1; }
.article-category{ font-size:.74rem; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:var(--mint); margin-bottom:12px; }
.article-body h3{ font-size:1.08rem; color:var(--text); line-height:1.35; margin-bottom:10px; }
.article-body p{ font-size:.9rem; color:var(--text-dim); line-height:1.6; flex:1; }
.article-meta{ display:flex; gap:14px; margin-top:20px; padding-top:18px; border-top:1px solid var(--border); font-size:.78rem; color:var(--text-faint); }
.article-link{ margin-top:18px; display:inline-flex; align-items:center; gap:6px; font-size:.86rem; font-weight:600; color:var(--mint-2); }
.article-link svg{ width:14px; height:14px; transition:transform .25s var(--ease); }
.article-card:hover .article-link svg{ transform:translateX(3px); }
.no-results{ text-align:center; color:var(--text-faint); padding:60px 0; display:none; }
.no-results.is-visible{ display:block; }

/* ============================= SINGLE ARTICLE ============================= */
.article-hero{ padding:calc(var(--header-h) + 56px) 0 0; }
.article-hero .back-link{
  display:flex; width:fit-content; align-items:center; gap:8px; font-size:.88rem; font-weight:600;
  color:var(--text-dim); margin-bottom:28px; transition:color .25s var(--ease);
}
.article-hero .back-link:hover{ color:var(--mint-2); }
.article-hero .back-link svg{ width:15px; height:15px; }
.article-hero .tag{ margin-bottom:18px; }
.article-hero h1{ font-size:clamp(2rem, 4vw, 2.9rem); max-width:22ch; margin-bottom:22px; }
.article-hero-meta{ display:flex; flex-wrap:wrap; gap:16px; font-size:.88rem; color:var(--text-faint); padding-bottom:40px; border-bottom:1px solid var(--border); }
.article-hero-meta span{ display:inline-flex; align-items:center; gap:8px; }
.article-cover-large{
  margin-top:40px; height:280px; border-radius:var(--radius-lg);
  display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg, var(--mint-dim), var(--obsidian-soft));
  border:1px solid var(--border);
}
.article-cover-large svg{ width:64px; height:64px; color:var(--mint); }

.article-prose{ max-width:720px; margin:0 auto; padding:64px 0 0; }
.article-prose h2{ font-size:1.55rem; color:var(--text); margin:48px 0 18px; }
.article-prose h2:first-child{ margin-top:0; }
.article-prose h3{ font-size:1.18rem; color:var(--text); margin:32px 0 14px; }
.article-prose p{ font-size:1.05rem; color:var(--text-dim); line-height:1.85; margin-bottom:22px; }
.article-prose ul{ margin:0 0 22px; padding-left:0; }
.article-prose li{
  position:relative; padding-left:28px; margin-bottom:12px;
  font-size:1.02rem; color:var(--text-dim); line-height:1.7;
}
.article-prose li::before{
  content:''; position:absolute; left:0; top:9px; width:8px; height:8px;
  border-radius:2px; background:var(--mint);
}
.article-prose strong{ color:var(--text); }
.article-prose a{ color:var(--mint-2); border-bottom:1px solid var(--mint-dim); }
.article-prose a:hover{ border-bottom-color:var(--mint); }

.callout{
  background:var(--surface); border:1px solid var(--border-strong); border-left:3px solid var(--mint);
  border-radius:var(--radius-md); padding:24px 28px; margin:32px 0;
}
.callout h4{ font-size:.78rem; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:var(--mint); margin-bottom:10px; }
.callout p{ margin-bottom:0; font-size:.98rem; }

.takeaways{
  background:linear-gradient(180deg, var(--surface-2), var(--surface));
  border:1px solid var(--border-strong); border-radius:var(--radius-lg);
  padding:32px 34px; margin:44px 0;
}
.takeaways h3{ font-size:1.1rem; color:var(--text); margin-bottom:16px; }
.takeaways ul{ margin:0; }
.takeaways li{ padding-left:28px; }

.article-cta{
  margin:56px 0; padding:44px 36px; text-align:center; border-radius:var(--radius-lg);
  background:linear-gradient(160deg, #ffffff, #e9f7ef);
  border:1px solid var(--border-strong); position:relative; overflow:hidden;
}
.article-cta::before{
  content:''; position:absolute; inset:0;
  background:radial-gradient(circle at 50% 0%, rgba(73,230,160,.22), transparent 60%);
  pointer-events:none;
}
.article-cta h3{ font-size:1.3rem; color:#0a0f0d; margin-bottom:12px; position:relative; }
.article-cta p{ max-width:46ch; margin:0 auto 24px; color:#3d4744; position:relative; }
.article-cta .btn{ position:relative; }
.article-cta .btn-primary{ color:#062b1b; }

.related-articles{ margin:56px 0 0; padding-top:48px; border-top:1px solid var(--border); }
.related-articles h3{ font-size:1.2rem; color:var(--text); margin-bottom:24px; }
.related-grid{ display:grid; grid-template-columns:repeat(2, 1fr); gap:20px; }
.related-card{
  display:block; padding:22px 24px; border:1px solid var(--border); border-radius:var(--radius-md);
  background:var(--surface); transition:border-color .3s var(--ease), transform .3s var(--ease);
}
.related-card:hover{ border-color:var(--border-strong); transform:translateY(-3px); }
.related-card span{ font-size:.72rem; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:var(--mint); }
.related-card h4{ font-size:1rem; color:var(--text); margin-top:8px; line-height:1.4; }

.author-box{
  display:flex; align-items:center; gap:16px; margin-top:56px; padding-top:36px; border-top:1px solid var(--border);
}
.author-avatar{
  width:52px; height:52px; border-radius:50%; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  font-family:'Space Grotesk', sans-serif; font-weight:700; font-size:1rem; color:#062b1b;
  background:linear-gradient(135deg, var(--mint-2), var(--mint));
}
.author-box .author-name{ font-size:.95rem; font-weight:600; color:var(--text); }
.author-box .author-role{ font-size:.85rem; color:var(--text-faint); margin-top:2px; }

/* ============================= HUB FOOTER CTA ============================= */
.insights-footer-cta{ margin-top:56px; padding-top:52px; border-top:1px solid var(--border); text-align:center; }
.insights-footer-cta h3{ font-size:1.4rem; color:var(--text); margin-bottom:14px; }
.insights-footer-cta p{ max-width:52ch; margin:0 auto 30px; color:var(--text-dim); font-size:1rem; line-height:1.7; }
.insights-footer-cta .cta-row{ display:inline-flex; flex-wrap:wrap; gap:14px; justify-content:center; }

/* ============================= FOOTER (shared with main site) ============================= */
footer{ border-top:1px solid var(--border); padding:80px 0 32px; background:var(--obsidian-soft); margin-top:120px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr .8fr .8fr 1fr; gap:48px; padding-bottom:56px; }
.footer-brand .brand{ margin-bottom:18px; }
.footer-brand p{ color:var(--text-dim); font-size:.92rem; line-height:1.7; max-width:34ch; }
.footer-col h4{ font-size:.82rem; letter-spacing:.1em; text-transform:uppercase; color:var(--text-faint); margin-bottom:20px; }
.footer-col ul{ display:flex; flex-direction:column; gap:13px; }
.footer-col a{ font-size:.92rem; color:var(--text-dim); transition:color .25s var(--ease); }
.footer-col a:hover{ color:var(--mint-2); }
.footer-col address{ font-style:normal; }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px; padding-top:28px; border-top:1px solid var(--border); font-size:.84rem; color:var(--text-faint); }
.footer-bottom a{ color:var(--text-faint); }
.footer-bottom a:hover{ color:var(--mint-2); }
.footer-legal{ display:flex; gap:22px; }

/* ============================= SCROLL REVEAL ============================= */
[data-animate]{ opacity:0; transform:translateY(24px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
[data-animate].is-visible{ opacity:1; transform:translateY(0); }
[data-animate-delay="1"]{ transition-delay:.08s; }
[data-animate-delay="2"]{ transition-delay:.16s; }
[data-animate-delay="3"]{ transition-delay:.24s; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  [data-animate]{ opacity:1; transform:none; transition:none; }
}

/* ============================= RESPONSIVE ============================= */
@media (max-width:1060px){
  .brand-suffix{ display:none; }
}
@media (max-width:1080px){
  .insights-grid{ grid-template-columns:repeat(2, 1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; row-gap:40px; }
}
@media (max-width:900px){
  .nav-links, .nav-cta{ display:none; }
  .nav-toggle{ display:flex; }
}
@media (max-width:640px){
  .container{ padding:0 20px; }
  .section-pad{ padding:80px 0; }
  .insights-grid{ grid-template-columns:1fr; }
  .related-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; gap:36px; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
  .article-cta{ padding:36px 22px; }
  .brand-suffix{ display:none; }
}