/* Brain Ignition — brainignitionn.com — Styles */
:root {
  --bi-primary: #0A3D2E;
  --bi-primary-light: #15755A;
  --bi-secondary: #39FF14;
  --bi-accent: #00E676;
  --bi-dark: #050F0B;
  --bi-text: #C8D6CF;
  --bi-light: #0D1F17;
  --bi-surface: #0F261D;
  --bi-white: #FFFFFF;
  --bi-bg: #060E0A;
  --bi-border: #1A3D2E;
  --bi-gradient: linear-gradient(135deg, #0A3D2E, #15755A);
  --bi-glow: 0 0 20px rgba(57,255,20,0.15);
  --bi-shadow: 0 4px 24px rgba(0,0,0,0.30);
  --bi-shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
  --bi-radius: 12px;
  --bi-font-heading: 'Archivo', -apple-system, BlinkMacSystemFont, sans-serif;
  --bi-font-body: 'Instrument Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--bi-font-body);
  color: var(--bi-text);
  line-height: 1.7;
  background: var(--bi-bg);
  overflow-x: hidden;
}
h1, h2, h3, h4 { font-family: var(--bi-font-heading); color: var(--bi-white); line-height: 1.3; }
a { color: var(--bi-secondary); text-decoration: none; transition: color .25s; }
a:hover { color: var(--bi-accent); }
img { max-width: 100%; height: auto; display: block; }
.bi-container { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
.bi-text-center { text-align: center; }
.bi-highlight { color: var(--bi-secondary); }
.bi-section { padding: 4rem 0; }

/* Trust Strip */
.bi-trust-strip {
  background: var(--bi-gradient);
  color: #fff;
  text-align: center;
  padding: .55rem 1rem;
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .02em;
}

/* Header */
.bi-header {
  background: var(--bi-bg);
  border-bottom: 1px solid var(--bi-border);
  position: sticky; top: 0; z-index: 1000;
  transition: box-shadow .3s;
}
.bi-header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,.4); }
.bi-nav-inner {
  display: flex; align-items: center; justify-content: space-between; padding: .75rem 1rem;
}
.bi-logo {
  font-family: var(--bi-font-heading);
  font-size: 1.5rem; font-weight: 800;
  color: var(--bi-white); letter-spacing: .03em;
}
.bi-logo span { color: var(--bi-secondary); }
.bi-nav-links { display: flex; gap: 1.5rem; }
.bi-nav-links a { font-size: .92rem; font-weight: 500; color: var(--bi-text); }
.bi-nav-links a:hover { color: var(--bi-secondary); }
.bi-cta-btn {
  display: inline-flex; align-items: center; gap: .4rem;
  background: var(--bi-secondary); color: var(--bi-dark) !important;
  padding: .7rem 1.6rem; border-radius: 50px;
  font-weight: 700; font-size: .95rem;
  transition: transform .25s, box-shadow .25s;
  border: none; cursor: pointer; text-decoration: none;
}
.bi-cta-btn:hover { transform: translateY(-2px); box-shadow: var(--bi-glow), var(--bi-shadow-lg); }
.bi-cta-pulse { animation: biPulse 2s infinite; }
@keyframes biPulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(57,255,20,.4); }
  50% { box-shadow: 0 0 0 14px rgba(57,255,20,0); }
}
.bi-cta-outline {
  display: inline-flex; align-items: center; gap: .4rem;
  border: 2px solid var(--bi-secondary); color: var(--bi-secondary) !important;
  padding: .65rem 1.5rem; border-radius: 50px;
  font-weight: 600; font-size: .95rem; transition: all .25s;
}
.bi-cta-outline:hover { background: var(--bi-secondary); color: var(--bi-dark) !important; }

/* Hamburger */
.bi-hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.bi-hamburger span { width: 26px; height: 3px; background: var(--bi-white); border-radius: 2px; transition: .3s; }

/* Drawer */
.bi-drawer-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 2000;
}
.bi-drawer-overlay.active { display: block; }
.bi-drawer {
  position: fixed; top: 0; right: -300px; width: 280px; height: 100%;
  background: var(--bi-bg); z-index: 2001; padding: 2rem 1.5rem;
  display: flex; flex-direction: column; gap: 1rem;
  transition: right .3s; box-shadow: -4px 0 20px rgba(0,0,0,.3);
  border-left: 1px solid var(--bi-border);
}
.bi-drawer.active { right: 0; }
.bi-drawer a { font-size: 1.05rem; padding: .5rem 0; border-bottom: 1px solid var(--bi-border); color: var(--bi-text); }
.bi-drawer-close { align-self: flex-end; font-size: 2rem; background: none; border: none; cursor: pointer; color: var(--bi-white); }

/* Hero */
.bi-hero {
  background: var(--bi-dark); padding: 4rem 0 3rem; position: relative; overflow: hidden;
}
.bi-hero-particles { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.bi-hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; position: relative; z-index: 1;
}
.bi-hero-badge {
  display: inline-block; background: var(--bi-gradient); color: var(--bi-secondary);
  padding: .45rem 1.2rem; border-radius: 50px; font-size: .82rem; font-weight: 600; margin-bottom: 1.2rem;
  border: 1px solid var(--bi-border);
}
.bi-hero h1 { font-size: 2.4rem; margin-bottom: 1rem; line-height: 1.2; }
.bi-hero-sub { font-size: 1.08rem; margin-bottom: 1.2rem; }
.bi-hero-checks { list-style: none; margin-bottom: 1.5rem; }
.bi-hero-checks li { padding: .3rem 0; font-size: .95rem; }
.bi-hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.bi-hero-trust-row { display: flex; gap: 1rem; align-items: center; }
.bi-hero-trust-row img { width: 55px; height: 55px; }
.bi-hero-img { text-align: center; }
.bi-hero-img img { max-width: 480px; margin: 0 auto; filter: drop-shadow(0 0 30px rgba(57,255,20,0.15)); }

/* Proof Bar */
.bi-proof-bar { background: var(--bi-primary); color: #fff; padding: 1.5rem 0; }
.bi-proof-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; text-align: center; }
.bi-proof-num { display: block; font-family: var(--bi-font-heading); font-size: 1.5rem; font-weight: 700; color: var(--bi-secondary); }
.bi-proof-item span:last-child { font-size: .85rem; opacity: .9; }

/* Section Badge */
.bi-section-badge {
  display: inline-block; background: var(--bi-surface); color: var(--bi-secondary);
  padding: .4rem 1rem; border-radius: 50px; font-size: .8rem; font-weight: 700;
  letter-spacing: .08em; margin-bottom: .8rem; border: 1px solid var(--bi-border);
}

/* What Is */
.bi-what-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; margin-top: 2rem; }
.bi-what-text p { margin-bottom: 1rem; }
.bi-what-img img { border-radius: var(--bi-radius); filter: drop-shadow(0 0 20px rgba(57,255,20,0.10)); }

/* How Steps */
.bi-how-img-wrap { text-align: center; margin: 2rem 0; }
.bi-how-img-wrap img { max-width: 800px; margin: 0 auto; border-radius: var(--bi-radius); }
.bi-how-steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; margin-bottom: 2rem; }
.bi-step-card {
  background: var(--bi-surface); padding: 1.5rem; border-radius: var(--bi-radius);
  text-align: center; transition: transform .3s, box-shadow .3s;
  border: 1px solid var(--bi-border);
}
.bi-step-card:hover { transform: translateY(-4px); box-shadow: var(--bi-glow); border-color: var(--bi-secondary); }
.bi-step-num { font-family: var(--bi-font-heading); font-size: 2rem; font-weight: 700; color: var(--bi-secondary); margin-bottom: .5rem; }

/* Ingredients */
.bi-ingr-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; margin: 2rem 0; }
.bi-ingr-card {
  background: var(--bi-surface); padding: 1.5rem; border-radius: var(--bi-radius);
  transition: transform .3s, box-shadow .3s; border: 1px solid var(--bi-border);
}
.bi-ingr-card:hover { transform: translateY(-4px); box-shadow: var(--bi-glow); border-color: var(--bi-secondary); }
.bi-ingr-icon { font-size: 2rem; margin-bottom: .5rem; }

/* Benefits */
.bi-benefits { background: var(--bi-dark); }
.bi-benefits-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; margin-top: 2rem; }
.bi-benefit-card {
  background: var(--bi-surface); border: 1px solid var(--bi-border);
  padding: 2rem 1.5rem; border-radius: var(--bi-radius); transition: transform .3s, box-shadow .3s;
}
.bi-benefit-card:hover { transform: translateY(-4px); box-shadow: var(--bi-glow); border-color: var(--bi-secondary); }
.bi-benefit-icon { font-size: 2.5rem; margin-bottom: .75rem; }

/* Comparison */
.bi-compare-table-wrap { overflow-x: auto; margin-top: 2rem; }
.bi-compare-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.bi-compare-table th, .bi-compare-table td { padding: .85rem 1rem; text-align: left; border-bottom: 1px solid var(--bi-border); }
.bi-compare-table th { background: var(--bi-primary); color: #fff; font-weight: 600; }
.bi-compare-hl { background: var(--bi-surface) !important; font-weight: 600; color: var(--bi-secondary); }

/* Reviews */
.bi-reviews-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; margin: 2rem 0; }
.bi-review-card {
  background: var(--bi-surface); border: 1px solid var(--bi-border);
  padding: 1.8rem; border-radius: var(--bi-radius); transition: box-shadow .3s;
}
.bi-review-card:hover { box-shadow: var(--bi-glow); }
.bi-review-stars { color: #f59e0b; font-size: 1.1rem; margin-bottom: .75rem; }
.bi-review-text { font-style: italic; margin-bottom: 1rem; font-size: .95rem; }
.bi-review-author { display: flex; align-items: center; gap: .75rem; }
.bi-review-author img { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; }
.bi-review-author strong { display: block; color: var(--bi-white); }
.bi-review-author span { font-size: .8rem; color: #6b7280; }

/* Pricing */
.bi-pricing { background: var(--bi-dark); }
.bi-pricing-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; margin: 2rem 0; align-items: start; }
.bi-price-card {
  background: var(--bi-surface); border: 2px solid var(--bi-border);
  border-radius: var(--bi-radius); padding: 2rem 1.5rem; text-align: center; transition: transform .3s;
}
.bi-price-card:hover { transform: translateY(-4px); }
.bi-price-popular {
  border-color: var(--bi-secondary); position: relative; transform: scale(1.04); box-shadow: var(--bi-glow);
}
.bi-price-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--bi-secondary); color: var(--bi-dark); padding: .35rem 1.2rem;
  border-radius: 50px; font-size: .75rem; font-weight: 700; white-space: nowrap;
}
.bi-price-label { font-family: var(--bi-font-heading); font-size: 1.1rem; font-weight: 600; margin-bottom: .75rem; color: var(--bi-accent); }
.bi-price-card img { margin: 0 auto 1rem; max-height: 180px; }
.bi-price-bottles { font-size: 1.2rem; font-weight: 700; color: var(--bi-white); }
.bi-price-supply { font-size: .85rem; color: #6b7280; margin-bottom: .5rem; }
.bi-price-amount { font-family: var(--bi-font-heading); font-size: 2.2rem; font-weight: 700; color: var(--bi-secondary); }
.bi-price-amount span { font-size: 1rem; font-weight: 400; color: var(--bi-text); }
.bi-price-shipping { font-size: .85rem; margin: .5rem 0 .75rem; }
.bi-pricing-trust { text-align: center; margin-top: 1.5rem; }
.bi-pricing-trust img { display: inline-block; margin: 0 auto; }
.bi-pricing-trust p { font-size: .85rem; color: #6b7280; margin-top: .5rem; }

/* Guarantee */
.bi-guarantee { background: var(--bi-surface); border-top: 1px solid var(--bi-border); border-bottom: 1px solid var(--bi-border); }
.bi-guarantee-inner { display: flex; align-items: center; gap: 3rem; }
.bi-guarantee-inner img { flex-shrink: 0; }
.bi-guarantee-text h2 { margin-bottom: 1rem; }
.bi-guarantee-text p { margin-bottom: 1rem; }

/* FAQ */
.bi-faq-list { max-width: 800px; margin: 2rem auto 0; }
.bi-faq-item { border-bottom: 1px solid var(--bi-border); }
.bi-faq-q {
  width: 100%; padding: 1.2rem 0; background: none; border: none;
  font-size: 1rem; font-weight: 600; text-align: left; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--bi-white); font-family: var(--bi-font-body);
}
.bi-faq-icon { font-size: 1.4rem; transition: transform .3s; color: var(--bi-secondary); }
.bi-faq-item.active .bi-faq-icon { transform: rotate(45deg); }
.bi-faq-a { max-height: 0; overflow: hidden; transition: max-height .4s ease, padding .3s; }
.bi-faq-item.active .bi-faq-a { max-height: 400px; padding-bottom: 1.2rem; }
.bi-faq-a p { font-size: .95rem; line-height: 1.7; }

/* Science */
.bi-science { background: var(--bi-dark); }
.bi-science-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; margin-top: 2rem; }
.bi-science-card {
  background: var(--bi-surface); padding: 2rem 1.5rem; border-radius: var(--bi-radius);
  border-left: 4px solid var(--bi-secondary);
}

/* Who Chips */
.bi-who-chips { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 2rem; }
.bi-who-chip {
  background: var(--bi-surface); border: 1px solid var(--bi-border);
  padding: .8rem 1.5rem; border-radius: 50px; font-size: .95rem; font-weight: 500;
  transition: all .3s;
}
.bi-who-chip:hover { border-color: var(--bi-secondary); box-shadow: var(--bi-glow); }

/* Final CTA */
.bi-final-cta { background: var(--bi-gradient); color: #fff; padding: 4rem 0; }
.bi-final-cta h2 { color: #fff; font-size: 2rem; margin-bottom: 1rem; }
.bi-final-cta p { color: rgba(255,255,255,.9); font-size: 1.1rem; margin-bottom: 1.5rem; }
.bi-final-cta .bi-cta-btn { background: #fff; color: var(--bi-primary) !important; }
.bi-final-cta-row { margin-bottom: 1rem; }
.bi-final-badges { display: flex; justify-content: center; gap: 1rem; margin-top: 1.5rem; }
.bi-final-badges img { width: 45px; height: 45px; }

/* Blog Teaser */
.bi-blog-teaser { background: var(--bi-dark); }
.bi-blog-teaser-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; margin: 2rem 0; }
.bi-blog-teaser-card {
  background: var(--bi-surface); padding: 1.5rem; border-radius: var(--bi-radius);
  border: 1px solid var(--bi-border); transition: box-shadow .3s;
}
.bi-blog-teaser-card:hover { box-shadow: var(--bi-glow); border-color: var(--bi-secondary); }
.bi-blog-teaser-card h3 { font-size: 1rem; margin-bottom: .5rem; }
.bi-blog-teaser-card p { font-size: .88rem; color: #6b7280; }

/* AEO */
.bi-aeo-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; margin-top: 2rem; }
.bi-aeo-card {
  background: var(--bi-surface); padding: 1.5rem; border-radius: var(--bi-radius);
  border-left: 4px solid var(--bi-secondary);
}

/* Trust Row */
.bi-trust-badges { background: var(--bi-dark); }
.bi-trust-row { display: flex; justify-content: center; gap: 3rem; margin-top: 2rem; flex-wrap: wrap; }
.bi-trust-item { text-align: center; }
.bi-trust-item img { margin: 0 auto .5rem; }
.bi-trust-item span { font-size: .85rem; color: var(--bi-text); }

/* Footer */
.bi-footer { background: var(--bi-dark); color: rgba(255,255,255,.6); padding: 4rem 0 2rem; border-top: 1px solid var(--bi-border); }
.bi-footer-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 2rem; margin-bottom: 3rem; }
.bi-footer-col h4 { color: var(--bi-white); margin-bottom: 1rem; font-size: 1rem; }
.bi-footer-col p { font-size: .88rem; line-height: 1.6; }
.bi-footer-col a { display: block; color: rgba(255,255,255,.6); font-size: .88rem; padding: .25rem 0; transition: color .25s; }
.bi-footer-col a:hover { color: var(--bi-secondary); }
.bi-footer-bottom { border-top: 1px solid var(--bi-border); padding-top: 2rem; text-align: center; font-size: .8rem; }
.bi-footer-bottom p { margin-bottom: .5rem; }

/* Sticky Bar */
.bi-sticky-bar {
  display: none; position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--bi-dark); padding: .7rem 1rem; z-index: 999;
  box-shadow: 0 -4px 20px rgba(0,0,0,.4); border-top: 1px solid var(--bi-border);
}
.bi-sticky-inner { display: flex; align-items: center; justify-content: center; gap: 1rem; max-width: 600px; margin: 0 auto; }
.bi-sticky-inner span { color: #fff; font-size: .88rem; font-weight: 500; }
.bi-sticky-inner a {
  background: var(--bi-secondary); color: var(--bi-dark) !important;
  padding: .5rem 1.4rem; border-radius: 50px; font-weight: 700; font-size: .88rem; white-space: nowrap;
}

/* Sub Pages */
.bi-sub-page { padding: 3rem 0; }
.bi-sub-page h1 { font-size: 2rem; margin-bottom: 1.5rem; }
.bi-sub-page h2 { font-size: 1.4rem; margin: 2rem 0 .75rem; }
.bi-sub-page p { margin-bottom: 1rem; }
.bi-sub-page ul { padding-left: 1.5rem; margin-bottom: 1rem; }
.bi-sub-page li { margin-bottom: .4rem; }

/* Reveal */
.bi-reveal { opacity: 0; transform: translateY(30px); transition: opacity .6s ease, transform .6s ease; }
.bi-reveal.visible { opacity: 1; transform: translateY(0); }

/* Hero Animation: DNA helix strands */
.bi-dna-strand {
  position: absolute; border-radius: 50%;
  background: rgba(57,255,20,0.12); pointer-events: none;
  animation: biDnaFloat 5s ease-in-out infinite;
}
@keyframes biDnaFloat {
  0% { transform: translateY(0) rotate(0deg) scale(1); opacity: .6; }
  50% { transform: translateY(-50px) rotate(180deg) scale(1.3); opacity: .2; }
  100% { transform: translateY(-100px) rotate(360deg) scale(0.8); opacity: 0; }
}

/* RESPONSIVE 920px */
@media (max-width: 920px) {
  .bi-nav-links { display: none; }
  .bi-hamburger { display: flex; }
  .bi-hero-grid { grid-template-columns: 1fr; text-align: center; }
  .bi-hero-img { order: -1; }
  .bi-hero-img img { max-width: 320px; }
  .bi-hero-checks { text-align: left; display: inline-block; }
  .bi-hero-ctas { justify-content: center; }
  .bi-hero-trust-row { justify-content: center; }
  .bi-proof-grid { grid-template-columns: repeat(2,1fr); }
  .bi-what-grid { grid-template-columns: 1fr; }
  .bi-how-steps { grid-template-columns: 1fr; }
  .bi-ingr-grid { grid-template-columns: 1fr; }
  .bi-benefits-grid { grid-template-columns: repeat(2,1fr); }
  .bi-reviews-grid { grid-template-columns: 1fr; }
  .bi-pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin-left: auto; margin-right: auto; }
  .bi-price-popular { transform: none; }
  .bi-guarantee-inner { flex-direction: column; text-align: center; }
  .bi-science-grid { grid-template-columns: 1fr; }
  .bi-blog-teaser-grid { grid-template-columns: 1fr; }
  .bi-aeo-grid { grid-template-columns: 1fr; }
  .bi-footer-grid { grid-template-columns: repeat(2,1fr); }
  .bi-sticky-bar { display: block; }
}

/* RESPONSIVE 480px */
@media (max-width: 480px) {
  .bi-hero h1 { font-size: 1.7rem; }
  .bi-proof-grid { grid-template-columns: repeat(2,1fr); gap: .5rem; }
  .bi-proof-num { font-size: 1.2rem; }
  .bi-benefits-grid { grid-template-columns: 1fr; }
  .bi-footer-grid { grid-template-columns: 1fr; }
  .bi-section { padding: 2.5rem 0; }
}

/* RESPONSIVE 380px */
@media (max-width: 380px) {
  .bi-hero h1 { font-size: 1.45rem; }
  .bi-hero-badge { font-size: .72rem; }
  .bi-cta-btn { padding: .6rem 1.2rem; font-size: .85rem; }
}