/* ===================================================================
   BRAINVEX (brainsvex.us variant) — custom design system
   Palette: deep teal #2d4a43 | amber-gold #e0a23d | cream #f8f5ee
            darker teal #1e332e | stone #626d64 | line #e6e0cf
   Display: 'Instrument Serif' (elegant, distinctive editorial feel)
   Body:    'Figtree' (clean, modern sans)
   Signature: synapse spark (two neurons connected by a communicating spark)
   NOTE: all grids minmax(0,1fr); flex items min-width:0;
         images capped with min(NNNpx,100%); hero mobile order H1->img->rest.
=================================================================== */

:root{
  --teal:#2d4a43;
  --teal-dark:#1e332e;
  --amber:#e0a23d;
  --amber-dark:#c0842a;
  --cream:#f8f5ee;
  --tint:#ece5d2;
  --stone:#626d64;
  --line:#e6e0cf;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Figtree',sans-serif;
  color:#1c2622;
  background:var(--cream);
  margin:0;
  font-size:17px;
  line-height:1.7;
}
h1,h2,h3,h4,.bx-display{
  font-family:'Instrument Serif',serif;
  font-weight:400;
  line-height:1.24;
  color:#18211d;
}
.bx-eyebrow{
  font-family:'Figtree',sans-serif;
  text-transform:uppercase;
  letter-spacing:2.5px;
  font-weight:700;
  font-size:.78rem;
  color:var(--amber-dark);
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;height:auto;display:block;}
.container{max-width:1160px;margin:0 auto;padding:0 24px;}

/* ---------- Buttons ---------- */
.btn-bx{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--amber);
  color:#2b2008;
  font-weight:700;
  font-size:1.05rem;
  padding:15px 32px;
  border-radius:10px;
  border:none;
  cursor:pointer;
  transition:transform .15s ease, background .15s ease, box-shadow .15s ease;
  box-shadow:0 10px 24px rgba(224,162,61,.35);
}
.btn-bx:hover{background:var(--amber-dark);color:#fff;transform:translateY(-2px);}
.btn-bx-outline{
  display:inline-flex;align-items:center;gap:10px;
  background:transparent;
  border:2px solid rgba(255,255,255,.5);
  color:#fff;
  font-weight:700;font-size:1rem;
  padding:13px 28px;border-radius:10px;transition:all .15s ease;
}
.btn-bx-outline:hover{background:#fff;color:var(--teal-dark);border-color:#fff;}

/* ---------- Navbar ---------- */
.bx-nav{
  position:sticky;top:0;z-index:1000;
  background:var(--cream);
  padding:16px 0;
  border-bottom:1px solid var(--line);
}
.bx-nav .container{display:flex;align-items:center;justify-content:space-between;}
.bx-logo{
  font-family:'Instrument Serif',serif;
  font-weight:400;
  color:#18211d;
  font-size:1.6rem;
}
.bx-logo span{color:var(--amber-dark);}
.bx-nav-links{display:flex;gap:30px;list-style:none;margin:0;padding:0;align-items:center;}
.bx-nav-links a{color:#18211d;font-weight:600;font-size:.95rem;opacity:.82;}
.bx-nav-links a:hover{opacity:1;color:var(--amber-dark);}
.bx-nav-toggle{display:none;background:none;border:none;color:#18211d;font-size:1.8rem;cursor:pointer;}

@media(max-width:900px){
  .bx-nav-links{
    position:absolute;top:100%;left:0;right:0;background:var(--cream);
    flex-direction:column;gap:0;border-top:1px solid var(--line);
    display:none;
  }
  .bx-nav-links.open{display:flex;}
  .bx-nav-links li{width:100%;border-bottom:1px solid var(--line);}
  .bx-nav-links a{display:block;padding:16px 24px;}
  .bx-nav-cta{display:none;}
  .bx-nav-toggle{display:block;}
}

/* ---------- Hero ---------- */
.bx-hero{
  background:radial-gradient(ellipse at 85% 0%, #375c53 0%, var(--teal) 55%, var(--teal-dark) 100%);
  color:#fff;
  padding:64px 0 0;
  position:relative;
  overflow:hidden;
}
.bx-hero-row{display:flex;align-items:center;gap:48px;flex-wrap:wrap;position:relative;z-index:2;}
.bx-hero-copy{flex:1 1 440px;min-width:0;}
.bx-hero-top,.bx-hero-bottom{width:100%;}
.bx-hero-copy h1{font-size:2.7rem;color:#fff;margin:16px 0 20px;}
.bx-hero-copy h1 em{font-style:italic;color:var(--amber);}
.bx-hero-copy p{color:#d3ddd8;font-size:1.08rem;max-width:520px;font-family:'Figtree',sans-serif;}
.bx-hero-img{flex:1 1 240px;min-width:0;text-align:center;}
.bx-hero-img img{max-width:min(260px,100%);margin:0 auto;filter:drop-shadow(0 24px 32px rgba(0,0,0,.35));}
.bx-hero-btns{display:flex;gap:16px;flex-wrap:wrap;margin-top:28px;}
.bx-rating-inline{display:flex;align-items:center;gap:12px;margin-top:28px;color:#d3ddd8;font-weight:600;}
.bx-rating-inline .stars{color:var(--amber);letter-spacing:2px;font-size:1.2rem;}

/* Mobile hero reorder: eyebrow+H1, then image, then paragraph/buttons/rating */
@media(max-width:900px){
  .bx-hero-copy{display:contents;}
  .bx-hero-top{order:1;}
  .bx-hero-img{order:2;}
  .bx-hero-bottom{order:3;}
}

/* synapse spark signature */
.bx-synapse-wrap{margin-top:44px;padding-bottom:36px;display:flex;justify-content:center;position:relative;z-index:2;}
.bx-synapse-wrap svg{width:200px;height:80px;}
.bx-neuron{fill:var(--amber);opacity:.9;}
.bx-synapse-line{stroke:var(--amber);stroke-width:2;opacity:.5;}
.bx-spark{fill:#fff;}
.bx-synapse-label{text-align:center;color:#a8b8b1;font-size:.78rem;font-weight:700;margin-top:6px;text-transform:uppercase;letter-spacing:1px;}

/* ---------- Section shells ---------- */
.bx-section{padding:78px 0;}
.bx-section-tint{background:var(--tint);}
.bx-section-dark{background:var(--teal-dark);color:#d3ddd8;}
.bx-section-dark h2,.bx-section-dark h3{color:#fff;}
.bx-head{text-align:center;max-width:700px;margin:0 auto 46px;}
.bx-head h2{font-size:2.1rem;margin-top:10px;}

/* ---------- Trust badges ---------- */
.bx-badges{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
@media(max-width:800px){.bx-badges{grid-template-columns:repeat(2,minmax(0,1fr));}}
.bx-badge-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px 18px;text-align:center;}
.bx-badge-card img{max-width:min(150px,100%);margin:0 auto 14px;}
.bx-badge-card p{font-weight:700;color:#18211d;margin:0;font-size:1rem;}

/* ---------- Testimonials ---------- */
.bx-testi-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media(max-width:900px){.bx-testi-grid{grid-template-columns:1fr;}}
.bx-testi-card{background:#fff;border-radius:10px;padding:28px 24px;border:1px solid var(--line);}
.bx-testi-top{display:flex;align-items:center;gap:14px;margin-bottom:12px;}
.bx-testi-top img{width:54px;height:54px;border-radius:50%;object-fit:cover;}
.bx-testi-name{font-weight:700;color:#18211d;}
.bx-testi-loc{color:var(--stone);font-size:.85rem;}
.bx-stars{color:var(--amber-dark);letter-spacing:2px;margin-bottom:8px;}
.bx-testi-card blockquote{margin:0 0 8px;font-family:'Instrument Serif',serif;font-weight:400;font-size:1.1rem;color:#18211d;}
.bx-testi-card p{color:var(--stone);font-size:.92rem;margin:0;}

.bx-rating-strip{text-align:center;}
.bx-rating-strip img{max-width:min(320px,100%);margin:0 auto;}

/* ---------- About / How it works ---------- */
.bx-row{display:flex;align-items:center;gap:52px;flex-wrap:wrap;}
.bx-row.reverse{flex-direction:row-reverse;}
.bx-row-img{flex:1 1 220px;min-width:0;text-align:center;}
.bx-row-img img{max-width:min(240px,100%);margin:0 auto;}
.bx-row-copy{flex:1 1 440px;min-width:0;}
.bx-row-copy h2{font-size:2rem;margin-bottom:16px;}
.bx-row-copy p{color:var(--stone);}
.bx-section-dark .bx-row-copy p{color:#bfc9c3;}

/* ---------- How to use ---------- */
.bx-usebox{background:#fff;border-radius:12px;padding:32px;border:1px solid var(--line);max-width:640px;margin:0 auto;text-align:center;}
.bx-usebox h4{font-size:1.3rem;margin:0 0 10px;}
.bx-usebox p{color:var(--stone);margin:0;}

/* ---------- Ingredient cards ---------- */
.bx-ing-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
@media(max-width:900px){.bx-ing-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(max-width:620px){.bx-ing-grid{grid-template-columns:1fr;}}
.bx-ing-card{background:#fff;border-radius:10px;padding:22px 20px;border:1px solid var(--line);border-top:4px solid var(--amber);}
.bx-ing-card h4{font-size:1.1rem;margin:0 0 6px;font-family:'Instrument Serif',serif;font-weight:400;}
.bx-ing-dose{display:block;font-size:.78rem;color:var(--amber-dark);font-weight:700;margin-bottom:8px;}
.bx-ing-card p{margin:0;color:var(--stone);font-size:.9rem;}

/* ---------- Benefits ---------- */
.bx-benefit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
@media(max-width:900px){.bx-benefit-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(max-width:620px){.bx-benefit-grid{grid-template-columns:1fr;}}
.bx-benefit-card{background:#fff;border-radius:10px;padding:26px 22px;border:1px solid var(--line);}
.bx-benefit-card .mark{color:var(--amber-dark);font-weight:700;font-size:1.2rem;margin-right:6px;}
.bx-benefit-card h4{font-size:1.1rem;margin:8px 0 8px;font-weight:400;}
.bx-benefit-card p{margin:0;color:var(--stone);font-size:.94rem;}

/* ---------- Pricing ---------- */
.bx-pricing-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px;align-items:stretch;}
@media(max-width:900px){.bx-pricing-grid{grid-template-columns:1fr;max-width:420px;margin:0 auto;}}
.bx-price-card{
  background:#fff;border-radius:14px;
  padding:30px 24px;text-align:center;position:relative;display:flex;flex-direction:column;
  border:2px solid var(--line);
}
.bx-price-card.featured{
  border-color:var(--amber);
  box-shadow:0 22px 40px rgba(224,162,61,.2);
  transform:translateY(-8px);
}
@media(max-width:900px){.bx-price-card.featured{transform:none;}}
.bx-ribbon{
  position:absolute;top:-14px;left:50%;transform:translateX(-50%);
  background:var(--amber);color:#2b2008;font-weight:700;
  font-size:.76rem;letter-spacing:.5px;text-transform:uppercase;
  padding:6px 16px;border-radius:20px;white-space:nowrap;
}
.bx-ribbon.value{background:var(--teal);color:#fff;}
.bx-price-card img.bottle{max-width:min(140px,100%);margin:6px auto 14px;}
.bx-pack-title{font-family:'Instrument Serif',serif;font-weight:400;font-size:1.5rem;}
.bx-pack-sub{color:var(--stone);font-size:.9rem;margin-bottom:14px;}
.bx-perbottle{font-family:'Instrument Serif',serif;font-weight:400;font-size:2.5rem;color:#18211d;line-height:1;}
.bx-perbottle span{font-family:'Figtree',sans-serif;font-size:.9rem;font-weight:400;color:var(--stone);}
.bx-total{font-weight:700;margin:10px 0 2px;}
.bx-ship{font-size:.86rem;font-weight:700;margin-bottom:18px;color:var(--amber-dark);}
.bx-ship.paid{color:var(--stone);}
.bx-price-card .btn-bx{width:100%;justify-content:center;margin-top:auto;}
.bx-cards-img{max-width:min(190px,100%);margin:14px auto 0;opacity:.85;}

/* ---------- Stock warning ---------- */
.bx-warning{
  background:#f2e8d3;border:2px dashed var(--amber-dark);border-radius:10px;
  padding:18px 24px;text-align:center;color:var(--amber-dark);font-weight:700;
  font-size:1rem;
}

/* ---------- Guarantee ---------- */
.bx-guarantee{display:flex;align-items:center;gap:44px;flex-wrap:wrap;background:#fff;border-radius:14px;padding:40px;border:1px solid var(--line);}
.bx-guarantee img{max-width:min(180px,100%);margin:0 auto;}
.bx-guarantee-copy{flex:1 1 360px;min-width:0;}
.bx-guarantee-copy h3{font-size:1.9rem;margin-bottom:14px;}
.bx-guarantee-copy p{color:var(--stone);}

/* ---------- Final CTA ---------- */
.bx-final-cta{
  background:linear-gradient(135deg,var(--teal-dark) 0%,var(--teal) 100%);
  color:#fff;text-align:center;border-radius:18px;padding:56px 30px;
}
.bx-final-cta h2{color:#fff;font-size:2.3rem;}
.bx-final-cta img{max-width:min(200px,100%);margin:24px auto;}
.bx-final-cta .old-price{text-decoration:line-through;opacity:.75;font-size:1.1rem;}
.bx-final-cta .new-price{font-family:'Instrument Serif',serif;font-weight:400;color:var(--amber);font-size:2.4rem;margin:6px 0 22px;}

/* ---------- FAQ ---------- */
.bx-faq-item{border-bottom:1px solid var(--line);}
.bx-faq-q{
  width:100%;text-align:left;background:none;border:none;padding:20px 4px;
  display:flex;justify-content:space-between;align-items:center;cursor:pointer;
  font-weight:700;font-size:1.1rem;color:#18211d;font-family:'Instrument Serif',serif;font-weight:400;gap:16px;
}
.bx-faq-q::after{content:'+';font-size:1.5rem;color:var(--amber-dark);transition:transform .2s;flex-shrink:0;}
.bx-faq-item.open .bx-faq-q::after{transform:rotate(45deg);}
.bx-faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.bx-faq-a p{padding:0 4px 20px;margin:0;color:var(--stone);}

/* ---------- Footer ---------- */
.bx-footer{background:var(--teal-dark);color:#98a49c;padding:44px 0 30px;font-size:.9rem;}
.bx-footer a{color:#d3ddd8;}
.bx-footer a:hover{color:var(--amber);}
.bx-footer hr{border-color:rgba(255,255,255,.12);margin:26px 0;}

/* ---------- Sticky mobile order bar ---------- */
.bx-sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:1030;
  background:var(--teal-dark);padding:10px 16px;display:none;
  align-items:center;justify-content:space-between;gap:12px;
  box-shadow:0 -6px 20px rgba(0,0,0,.3);border-top:2px solid var(--amber);
}
.bx-sticky-bar .price{color:#fff;line-height:1.2;}
.bx-sticky-bar .price b{color:var(--amber);font-size:1.15rem;font-family:'Instrument Serif',serif;}
.bx-sticky-bar .price small{display:block;color:#98a49c;font-size:.72rem;}
@media(max-width:900px){.bx-sticky-bar{display:flex;}body{padding-bottom:70px;}}

.align-center{text-align:center;}