/* =============================
   Super Use-Case Design System
   ============================= */
:root {
  --paper:#f7f5ef;--ink:#0a0a0a;--muted:#6b665f;--white:#ffffff;--line:rgba(10,10,10,.12);
  --radius-xl:36px;--radius-lg:24px;--shadow-soft:0 24px 70px rgba(0,0,0,.12);--shadow-hard:0 30px 90px rgba(0,0,0,.2);
}
html,body{margin:0;padding:0;font-family:'Cabinet Grotesk',system-ui,sans-serif;color:var(--ink);background:
radial-gradient(1200px 600px at 15% -10%,rgba(10,10,10,.06),transparent 60%),
radial-gradient(900px 500px at 85% 0%,rgba(10,10,10,.05),transparent 60%),
radial-gradient(700px 500px at 50% 100%,rgba(10,10,10,.04),transparent 60%),var(--paper);} 
.page{overflow-x:hidden;position:relative;}
.ambient-grid{position:fixed;inset:0;background-image:linear-gradient(to right,rgba(0,0,0,.04)1px,transparent 1px),linear-gradient(to bottom,rgba(0,0,0,.04)1px,transparent 1px);background-size:48px 48px;pointer-events:none;z-index:0;}
.paper-noise{position:fixed;inset:0;pointer-events:none;z-index:1;background-image:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="120" height="120"><filter id="n"><feTurbulence type="fractalNoise" baseFrequency="0.8" numOctaves="4"/></filter><rect width="120" height="120" filter="url(%23n)" opacity="0.035"/></svg>');}
.shell{max-width:1200px;margin:0 auto;padding:0 32px;position:relative;z-index:2;}
.nav{position:fixed;top:16px;left:50%;transform:translateX(-50%);display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center;padding:12px 20px;border-radius:999px;background:rgba(247,245,239,.8);backdrop-filter:blur(10px);box-shadow:var(--shadow-soft);z-index:10;}
.brand img{width:36px;height:36px;}
.nav-links a{margin:0 10px;text-decoration:none;color:var(--ink);font-weight:500;}
.btn{display:inline-block;padding:14px 24px;border-radius:999px;text-decoration:none;font-weight:800;transition:transform .3s,box-shadow .3s;}
.btn-black{background:var(--ink);color:var(--white);} .btn-white{background:var(--white);color:var(--ink);box-shadow:inset 0 0 0 1px var(--line);} .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hard);} 
.hero{padding:200px 0 140px;} .hero-inner{text-align:center;} .hero h1{font-size:clamp(42px,6vw,72px);line-height:1.05;max-width:1120px;margin:0 auto 24px;} .hero-sub{font-size:20px;color:var(--muted);max-width:760px;margin:0 auto 36px;} .hero-actions{display:flex;justify-content:center;gap:18px;margin-bottom:60px;} 
.media-frame{aspect-ratio:16/9;border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-hard);} .media-frame video{width:100%;height:100%;object-fit:cover;} 
.chapter{padding:140px 0;} .chapter h2{text-align:center;font-size:clamp(32px,4vw,48px);margin-bottom:48px;} 
.bento{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:28px;grid-auto-flow:dense;} .bento-item{background:var(--white);padding:32px;border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);} 
.long-form-guide{padding:120px 0;font-size:18px;line-height:1.65;} .long-form-guide h2{margin-top:64px;} .long-form-guide ul{margin-left:20px;} .byline{color:var(--muted);font-size:14px;} 
.cluster-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;list-style:none;padding:0;} .cluster-links a{text-decoration:none;color:var(--ink);font-weight:600;} 
.cta-band{text-align:center;padding:160px 0;} 
@media(max-width:768px){.hero{padding:160px 0 120px;} .nav-links{display:none;} .hero-actions{flex-direction:column;} .chapter{padding:100px 0;}}