/* =========================================================
   Creator Vault Tools — Premium 3D eBook Library
   Design tokens
   ========================================================= */
:root{
  --ink:#05060c;
  --navy:#0b0f1f;
  --navy-2:#111633;
  --navy-3:#171d40;
  --gold:#c9a227;
  --gold-light:#f2d98a;
  --gold-deep:#9c7a17;
  --white:#f6f4ee;
  --white-dim:#c9cad6;
  --muted:#8b8fa8;
  --glass-bg:rgba(255,255,255,0.045);
  --glass-border:rgba(242,217,138,0.16);
  --glass-border-strong:rgba(242,217,138,0.35);
  --shadow-deep:0 30px 80px rgba(0,0,0,0.55);
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:10px;
  --font-display:'Fraunces', Georgia, serif;
  --font-body:'Manrope', system-ui, -apple-system, sans-serif;
  --ease:cubic-bezier(.22,.9,.3,1);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink);
  color:var(--white);
  font-family:var(--font-body);
  line-height:1.55;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;margin:0;padding:0;}
button{font-family:inherit;}

.section-inner{
  max-width:1200px;
  margin:0 auto;
  padding:0 clamp(20px,5vw,48px);
}
.eyebrow{
  font-family:var(--font-body);
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  font-size:.72rem;
  color:var(--gold-light);
  margin:0 0 12px;
}
.eyebrow.center{text-align:center;}
.h2{
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(1.8rem,3.6vw,2.7rem);
  margin:0 0 20px;
  letter-spacing:-.01em;
}
.h2.center{text-align:center;}
.body-text{
  color:var(--white-dim);
  font-size:1.05rem;
  max-width:520px;
  margin:0 0 22px;
}
.center .body-text{margin-left:auto;margin-right:auto;}

/* =========================================================
   Buttons
   ========================================================= */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:16px 30px;
  border-radius:999px;
  font-weight:800;
  font-size:.98rem;
  letter-spacing:.01em;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .25s var(--ease), box-shadow .25s var(--ease), filter .25s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg, var(--gold-light), var(--gold) 55%, var(--gold-deep));
  color:#171102;
  box-shadow:0 12px 30px rgba(201,162,39,.35);
}
.btn-primary:hover{transform:translateY(-2px) scale(1.015);filter:brightness(1.06);}
.btn-glow{position:relative;}
.btn-glow::after{
  content:"";
  position:absolute;inset:-6px;
  border-radius:inherit;
  background:radial-gradient(closest-side, rgba(242,217,138,.55), transparent 70%);
  z-index:-1;
  opacity:.55;
  animation:pulseGlow 2.6s ease-in-out infinite;
}
@keyframes pulseGlow{
  0%,100%{opacity:.35;transform:scale(1);}
  50%{opacity:.65;transform:scale(1.06);}
}
.btn-ghost{
  background:transparent;
  color:var(--white);
  border:1px solid rgba(255,255,255,.22);
}
.btn-ghost:hover{border-color:var(--gold-light);color:var(--gold-light);}
.btn-block{width:100%;}
.btn-lg{padding:20px 44px;font-size:1.1rem;}

/* =========================================================
   Glassmorphism
   ========================================================= */
.glass{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-deep);
}

/* =========================================================
   Navigation
   ========================================================= */
.nav{
  position:fixed;top:0;left:0;right:0;
  z-index:200;
  padding:14px clamp(16px,4vw,32px);
  background:rgba(5,6,12,0.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:background .3s var(--ease), padding .3s var(--ease);
}
.nav.scrolled{background:rgba(5,6,12,0.85);}
.nav-inner{
  max-width:1280px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.nav-brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:600;font-size:1.05rem;}
.nav-brand-mark{
  width:36px;height:36px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--gold-light),var(--gold));
  color:#171102;font-weight:800;font-family:var(--font-body);font-size:.85rem;
}
.nav-brand-text em{font-style:normal;color:var(--gold-light);}
.nav-links{display:flex;gap:28px;}
.nav-link{font-size:.92rem;color:var(--white-dim);font-weight:600;transition:color .2s;}
.nav-link:hover{color:var(--gold-light);}
.nav-cta{
  background:linear-gradient(135deg,var(--gold-light),var(--gold));
  color:#171102;font-weight:800;font-size:.85rem;
  padding:11px 20px;border-radius:999px;white-space:nowrap;
  transition:transform .2s var(--ease);
}
.nav-cta:hover{transform:translateY(-2px);}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px;}
.nav-toggle span{width:22px;height:2px;background:var(--white);border-radius:2px;transition:.3s;}

/* =========================================================
   Hero
   ========================================================= */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;flex-direction:column;justify-content:center;
  padding:130px clamp(20px,5vw,48px) 80px;
  overflow:hidden;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(23,29,64,.7), transparent 55%),
    linear-gradient(180deg, var(--ink) 0%, var(--navy) 100%);
}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none;}
.hero-glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.35;}
.hero-glow--gold{width:520px;height:520px;background:var(--gold);top:-120px;right:-100px;}
.hero-glow--blue{width:460px;height:460px;background:#2b3a8f;bottom:-140px;left:-120px;}
.particles{position:absolute;inset:0;}
.particle{
  position:absolute;width:3px;height:3px;border-radius:50%;
  background:var(--gold-light);opacity:.5;
  animation:floatUp linear infinite;
}
@keyframes floatUp{
  0%{transform:translateY(0) translateX(0);opacity:0;}
  10%{opacity:.6;}
  90%{opacity:.4;}
  100%{transform:translateY(-100vh) translateX(20px);opacity:0;}
}

.hero-inner{
  position:relative;z-index:1;
  max-width:1280px;margin:0 auto;width:100%;
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
}
.badge{
  display:inline-block;
  padding:8px 16px;border-radius:999px;
  background:rgba(201,162,39,.12);
  border:1px solid var(--glass-border-strong);
  color:var(--gold-light);
  font-size:.78rem;font-weight:800;letter-spacing:.05em;
  margin-bottom:22px;
}
.hero-title{
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(2.2rem,5vw,3.6rem);
  line-height:1.1;
  letter-spacing:-.01em;
  margin:0 0 20px;
}
.gold-text{
  background:linear-gradient(120deg,var(--gold-light),var(--gold) 60%,var(--gold-deep));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  font-size:1.08rem;color:var(--white-dim);max-width:520px;margin:0 0 26px;
}
.benefit-badges{
  display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;
}
.benefit-badges li{
  font-size:.85rem;font-weight:700;color:var(--white);
  padding:8px 14px;border-radius:999px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.08);
}
.hero-cta-row{display:flex;flex-wrap:wrap;gap:16px;}

/* Hero visual — 3D floating book stage */
.hero-visual{position:relative;min-height:520px;}
.book-stage{
  position:relative;
  width:100%;height:420px;
  perspective:1200px;
  transform-style:preserve-3d;
}
.book{
  position:absolute;
  width:150px;height:210px;
  border-radius:6px 10px 10px 6px;
  background:linear-gradient(135deg, hsl(var(--hue) 70% 22%), hsl(var(--hue) 60% 10%));
  border:1px solid rgba(255,255,255,.12);
  box-shadow:12px 20px 40px rgba(0,0,0,.55), inset 3px 0 0 rgba(255,255,255,.15);
  display:flex;align-items:flex-end;
  padding:16px;
  color:var(--gold-light);
  font-family:var(--font-display);
  font-weight:600;
  font-size:1rem;
  transform-style:preserve-3d;
  animation:floatBook 6s ease-in-out infinite;
  will-change:transform;
}
.book span{text-shadow:0 2px 8px rgba(0,0,0,.6);}
.book::before{
  content:"";position:absolute;inset:0;left:0;width:10px;
  background:linear-gradient(180deg, rgba(255,255,255,.25), rgba(0,0,0,.3));
  border-radius:6px 0 0 6px;
}
.book-1{top:6%;left:8%;transform:rotateY(-18deg) rotateZ(-6deg) translateZ(40px);animation-delay:0s;}
.book-2{top:2%;left:32%;transform:rotateY(-8deg) rotateZ(-2deg) translateZ(70px);animation-delay:.6s;z-index:2;}
.book-3{top:10%;left:54%;transform:rotateY(6deg) rotateZ(3deg) translateZ(30px);animation-delay:1.2s;}
.book-4{top:38%;left:14%;transform:rotateY(-10deg) rotateZ(-4deg) translateZ(10px);animation-delay:1.8s;}
.book-5{top:34%;left:58%;transform:rotateY(14deg) rotateZ(5deg) translateZ(50px);animation-delay:2.4s;}
.book-6{top:44%;left:36%;transform:rotateY(2deg) translateZ(90px);animation-delay:3s;z-index:3;}
@keyframes floatBook{
  0%,100%{translate:0 0;}
  50%{translate:0 -14px;}
}
.stage-shadow{
  position:absolute;bottom:0;left:10%;right:10%;height:40px;
  background:radial-gradient(ellipse, rgba(0,0,0,.55), transparent 70%);
  filter:blur(4px);
}

.price-card{
  position:relative;
  margin-top:-30px;margin-left:auto;
  width:min(320px,90%);
  border-radius:var(--radius-lg);
  padding:26px 26px 24px;
  text-align:center;
}
.price-card-label{
  font-size:.72rem;font-weight:800;letter-spacing:.14em;
  color:var(--gold-light);text-transform:uppercase;margin:0 0 10px;
}
.price-old{
  color:var(--muted);text-decoration:line-through;
  font-size:1.1rem;margin:0;
}
.price-old--lg{font-size:1.4rem;}
.price-new{
  font-family:var(--font-display);font-weight:700;
  font-size:2.6rem;
  background:linear-gradient(120deg,var(--gold-light),var(--gold));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin:2px 0 10px;
}
.price-new--lg{font-size:3rem;}
.price-new--xl{font-size:clamp(3rem,8vw,5rem);}
.price-tags{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:18px;}
.price-tags.center{justify-content:center;margin:18px 0 30px;}
.tag{
  font-size:.75rem;font-weight:800;padding:6px 12px;border-radius:999px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
}
.tag-gold{background:rgba(201,162,39,.18);color:var(--gold-light);border-color:var(--glass-border-strong);}
.price-card-notes{margin-top:16px;display:flex;flex-direction:column;gap:6px;font-size:.82rem;color:var(--white-dim);}

.scroll-cue{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  z-index:1;
}
.scroll-cue span{
  display:block;width:22px;height:36px;border:2px solid rgba(255,255,255,.3);border-radius:14px;position:relative;
}
.scroll-cue span::before{
  content:"";position:absolute;top:6px;left:50%;width:4px;height:8px;background:var(--gold-light);
  border-radius:2px;transform:translateX(-50%);
  animation:cueDot 1.6s ease-in-out infinite;
}
@keyframes cueDot{0%{opacity:1;top:6px;}100%{opacity:0;top:18px;}}

/* =========================================================
   Trust bar
   ========================================================= */
.trust-bar{
  background:var(--navy-2);
  border-top:1px solid rgba(255,255,255,.06);
  border-bottom:1px solid rgba(255,255,255,.06);
  padding:18px 0;
}
.trust-inner{
  max-width:1200px;margin:0 auto;padding:0 20px;
  display:flex;flex-wrap:wrap;justify-content:center;gap:14px 32px;
}
.trust-item{font-size:.85rem;font-weight:700;color:var(--white-dim);}

/* =========================================================
   Sections shared spacing
   ========================================================= */
section{padding:96px 0;position:relative;}
.intro{background:var(--ink);}
.categories{background:linear-gradient(180deg,var(--ink),var(--navy) 100%);}
.showcase{background:var(--navy);}
.benefits{background:linear-gradient(180deg,var(--navy),var(--ink));}
.value{background:var(--ink);}
.reviews{background:var(--navy-2);}
.creator{background:var(--ink);}
.offer{background:linear-gradient(160deg,var(--navy-3),var(--navy));}
.faq{background:var(--ink);}
.footer{background:var(--navy-2);padding:32px 0;}

/* Product intro */
.intro-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center;}
.stack-3d{
  position:relative;height:320px;perspective:1000px;
  display:flex;align-items:center;justify-content:center;
}
.stack-book{
  position:absolute;width:200px;height:260px;border-radius:8px;
  background:linear-gradient(135deg,var(--navy-3),var(--navy));
  border:1px solid var(--glass-border);
  box-shadow:0 20px 50px rgba(0,0,0,.5);
  transform:
    rotateY(calc(-14deg + var(--i) * 6deg))
    translateZ(calc(var(--i) * -26px))
    translateX(calc(var(--i) * 14px));
}
.stack-book::after{
  content:"";position:absolute;inset:14px;border:1px solid rgba(242,217,138,.25);border-radius:4px;
}
.stack-glow{
  position:absolute;width:260px;height:60px;bottom:-20px;
  background:radial-gradient(ellipse,rgba(201,162,39,.35),transparent 70%);
  filter:blur(10px);
}

/* Categories */
.cat-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
  gap:16px;
}
.cat-card{
  display:flex;align-items:center;gap:12px;
  padding:18px;border-radius:var(--radius-md);
  background:var(--glass-bg);border:1px solid var(--glass-border);
  transition:transform .3s var(--ease), border-color .3s, background .3s;
  font-weight:700;font-size:.92rem;
}
.cat-card:hover{
  transform:translateY(-4px) rotateX(4deg);
  border-color:var(--glass-border-strong);
  background:rgba(201,162,39,.06);
}
.cat-icon{font-size:1.4rem;}

/* Showcase shelf */
.shelf{
  display:flex;justify-content:center;align-items:flex-end;
  gap:2px;padding:60px 0 20px;perspective:1400px;flex-wrap:wrap;
}
.shelf-book{
  width:70px;height:220px;border-radius:4px 8px 8px 4px;
  background:linear-gradient(160deg,var(--navy-3),var(--navy-2));
  border:1px solid var(--glass-border);
  display:flex;align-items:flex-end;justify-content:center;padding-bottom:16px;
  writing-mode:vertical-rl;
  color:var(--gold-light);font-weight:700;font-size:.8rem;font-family:var(--font-display);
  transform:rotate(calc(var(--r) * 1deg));
  transform-origin:bottom center;
  transition:transform .35s var(--ease), box-shadow .35s var(--ease);
  box-shadow:4px 10px 20px rgba(0,0,0,.4);
}
.shelf-book:hover{
  transform:rotate(0deg) translateY(-18px);
  box-shadow:0 30px 50px rgba(0,0,0,.5), 0 0 30px rgba(201,162,39,.25);
  z-index:2;
}

/* Benefits */
.benefit-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
.benefit-card{
  padding:30px 26px;border-radius:var(--radius-lg);
  background:var(--glass-bg);border:1px solid var(--glass-border);
  transition:transform .3s var(--ease), border-color .3s;
}
.benefit-card:hover{transform:translateY(-6px);border-color:var(--glass-border-strong);}
.benefit-icon{font-size:2rem;display:block;margin-bottom:14px;}
.benefit-card h3{font-family:var(--font-display);font-weight:600;font-size:1.15rem;margin:0 0 10px;}
.benefit-card p{color:var(--white-dim);font-size:.92rem;margin:0;}

/* Value comparison */
.value-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:26px;align-items:stretch;}
.value-card{
  padding:34px;border-radius:var(--radius-lg);
  background:var(--glass-bg);border:1px solid rgba(255,255,255,.08);
}
.value-card h3{font-family:var(--font-display);font-weight:600;font-size:1.3rem;margin:0 0 18px;}
.value-card ul li{color:var(--muted);padding:8px 0;border-bottom:1px dashed rgba(255,255,255,.08);}
.value-card--dominant{
  position:relative;
  background:linear-gradient(160deg,rgba(201,162,39,.14),rgba(201,162,39,.03));
  border:1px solid var(--glass-border-strong);
  box-shadow:0 30px 70px rgba(201,162,39,.15);
  transform:scale(1.03);
}
.value-badge{
  position:absolute;top:-14px;right:26px;
  background:linear-gradient(135deg,var(--gold-light),var(--gold));
  color:#171102;font-size:.7rem;font-weight:800;letter-spacing:.06em;
  padding:6px 14px;border-radius:999px;
}
.value-stat{font-size:1.3rem;font-weight:800;margin:6px 0;}
.value-stat span{color:var(--muted);font-weight:500;font-size:.85rem;}
.value-price{
  font-family:var(--font-display);font-size:2.4rem;font-weight:700;margin:14px 0 4px;
  color:var(--gold-light);
}
.value-price span{display:block;font-family:var(--font-body);font-size:.85rem;color:var(--muted);font-weight:600;}
.value-note{color:var(--white-dim);margin:0 0 20px;font-weight:600;}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.review-card{
  margin:0;padding:28px;border-radius:var(--radius-lg);
  background:var(--glass-bg);border:1px solid var(--glass-border);
}
.stars{margin:0 0 12px;letter-spacing:2px;}
.review-text{font-size:.96rem;color:var(--white-dim);margin:0 0 16px;font-style:italic;}
.review-card cite{font-style:normal;font-weight:800;color:var(--gold-light);font-size:.88rem;}

/* Creator */
.creator-grid{display:grid;grid-template-columns:.4fr 1fr;gap:40px;align-items:center;}
.creator-mark{
  width:140px;height:140px;border-radius:28px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-size:2.6rem;font-weight:700;
  background:linear-gradient(150deg,var(--navy-3),var(--navy));
  border:1px solid var(--glass-border-strong);
  color:var(--gold-light);
  box-shadow:0 20px 50px rgba(0,0,0,.5);
  margin:0 auto;
}

/* Offer breakdown */
.offer-card{border-radius:var(--radius-lg);padding:44px;text-align:center;}
.offer-price-row{
  display:flex;justify-content:center;gap:56px;flex-wrap:wrap;margin-bottom:22px;
}
.offer-label{font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 6px;}
.offer-save{font-size:1.8rem;font-weight:800;color:var(--gold-light);margin:0;}
.offer-features{color:var(--white-dim);font-weight:600;margin:0 0 28px;}

/* FAQ */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{
  border:1px solid var(--glass-border);border-radius:var(--radius-md);
  background:var(--glass-bg);overflow:hidden;
}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;
  padding:20px 22px;background:none;border:none;color:var(--white);
  font-size:1rem;font-weight:700;cursor:pointer;text-align:left;
}
.faq-icon{font-size:1.3rem;color:var(--gold-light);transition:transform .3s var(--ease);}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s var(--ease), padding .35s var(--ease);
  padding:0 22px;
}
.faq-item.open .faq-a{max-height:200px;padding:0 22px 20px;}
.faq-a p{margin:0;color:var(--white-dim);font-size:.95rem;}

/* Final CTA */
.final-cta{
  position:relative;text-align:center;
  padding:120px 0;
  overflow:hidden;
}
.final-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(201,162,39,.18), transparent 60%),
    linear-gradient(180deg,var(--navy-3),var(--ink));
}
.final-inner{position:relative;max-width:760px;}
.final-title{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(2rem,5vw,3.1rem);margin:0 0 14px;
}
.final-sub{color:var(--white-dim);font-size:1.1rem;margin:0 0 30px;}
.final-price{display:flex;align-items:baseline;justify-content:center;gap:18px;flex-wrap:wrap;}
.final-note{margin-top:24px;color:var(--muted);font-size:.88rem;font-weight:600;}

/* Footer */
.footer-inner{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:.85rem;color:var(--muted);
}
.footer-inner a{color:var(--gold-light);font-weight:700;}

/* =========================================================
   Sticky mobile bar
   ========================================================= */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:150;
  display:none;
  align-items:center;justify-content:space-between;
  padding:12px 18px;
  background:rgba(9,11,22,.92);
  backdrop-filter:blur(16px);
  border-top:1px solid var(--glass-border-strong);
  transform:translateY(100%);
  transition:transform .35s var(--ease);
}
.sticky-bar.visible{transform:translateY(0);}
.sticky-price{display:flex;flex-direction:column;line-height:1.1;}
.sticky-price-value{font-family:var(--font-display);font-size:1.3rem;font-weight:700;color:var(--gold-light);}
.sticky-price-note{font-size:.7rem;font-weight:800;color:var(--muted);}
.sticky-btn{padding:12px 24px;font-size:.85rem;}

/* =========================================================
   Scroll reveal
   ========================================================= */
.reveal{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in{opacity:1;transform:translateY(0);}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;}
  .hero-visual{margin-top:40px;}
  .intro-grid{grid-template-columns:1fr;}
  .value-grid{grid-template-columns:1fr;}
  .value-card--dominant{transform:none;}
  .creator-grid{grid-template-columns:1fr;text-align:center;}
  .review-grid{grid-template-columns:1fr 1fr;}
  .benefit-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:820px){
  .nav-links{
    position:fixed;top:64px;left:0;right:0;
    flex-direction:column;gap:0;
    background:rgba(6,8,16,.97);
    backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(255,255,255,.08);
    max-height:0;overflow:hidden;
    transition:max-height .35s var(--ease);
  }
  .nav-links.open{max-height:400px;}
  .nav-link{padding:16px 24px;border-bottom:1px solid rgba(255,255,255,.05);}
  .nav-toggle{display:flex;}
  .nav-cta{display:none;}
  .book-stage{display:none;}
  .price-card{margin:0 auto;}
  .hero{padding-top:110px;}
}

@media (max-width:640px){
  section{padding:64px 0;}
  .review-grid{grid-template-columns:1fr;}
  .benefit-grid{grid-template-columns:1fr;}
  .offer-price-row{gap:28px;}
  .hero-cta-row{flex-direction:column;}
  .btn{width:100%;}
  .hero-cta-row .btn{width:100%;}
  .sticky-bar{display:flex;}
  body{padding-bottom:74px;}
  .cat-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));}
  .shelf-book{width:52px;height:170px;}
}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001s !important; animation-iteration-count:1 !important; transition-duration:.001s !important;}
}