/* ===========================================
   Neurofuel – Shared Design System
   us-neurofuel.com  |  Last updated: 2026-10-25
   =========================================== */

/* ---- Google Font import ---- */
@import url('https://fonts.googleapis.com/css2?family=Jost:wght@300;400;500;600;700;800&display=swap');

/* ---- CSS Custom Properties ---- */
:root {
  /* Palette */
  --navy:    #0a1628;
  --navy-2:  #0e1f3a;
  --cobalt:  #1a3a6e;
  --cobalt-2:#1e4080;
  --cobalt-3:#2451a0;
  --cyan:    #00b4d8;
  --cyan-2:  #0096c7;
  --mint:    #52b788;
  --mint-2:  #40916c;
  --gold:    #f4c842;
  --gold-2:  #e0aa30;
  --white:   #ffffff;
  --off-white:#f8faff;
  --text-dark:#1a1a2e;
  --text-mid: #334155;
  --text-light:#64748b;
  --border:  #d1dff7;

  /* H2 bar gradient sets */
  --h2-a: linear-gradient(135deg, #0a1628 0%, #1a3a6e 100%);
  --h2-b: linear-gradient(135deg, #1a3a6e 0%, #2451a0 100%);
  --h2-c: linear-gradient(135deg, #0096c7 0%, #00b4d8 100%);
  --h2-d: linear-gradient(135deg, #40916c 0%, #52b788 100%);
  --h2-e: linear-gradient(135deg, #e0aa30 0%, #f4c842 100%);
  --h2-f: linear-gradient(135deg, #1e4080 0%, #0096c7 100%);
  --h2-g: linear-gradient(135deg, #0a1628 0%, #40916c 100%);

  /* H3 bar sets */
  --h3-a: linear-gradient(135deg, #1e4080 0%, #2451a0 100%);
  --h3-b: linear-gradient(135deg, #0096c7 0%, #52b788 100%);
  --h3-c: linear-gradient(135deg, #40916c 0%, #2451a0 100%);
  --h3-d: linear-gradient(135deg, #e0aa30 0%, #1a3a6e 100%);
  --h3-e: linear-gradient(135deg, #2451a0 0%, #0096c7 100%);

  /* Typography */
  --font: 'Jost', sans-serif;
  --h1-size: 34px;
  --h2-size: 32px;
  --h3-size: 30px;
  --body-size: 26px;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

html { scroll-behavior:smooth; }

body {
  font-family: var(--font);
  font-size: var(--body-size);
  line-height: 1.65;
  color: var(--text-dark);
  background: var(--white);
  overflow-x: hidden;
}

img { max-width:100%; height:auto; display:block; }

a { color: var(--cobalt-3); text-decoration:none; }
a:hover { color: var(--cyan); }

ul { list-style:none; }

/* ---- Headings ---- */
h1 {
  font-size: var(--h1-size);
  font-weight: 800;
  line-height: 1.25;
  color: var(--white);
  text-align: center;
  padding: 36px 24px 30px;
  background: var(--h2-a);
  width: 100%;
  margin-bottom: 0;
}

h2 {
  font-size: var(--h2-size);
  font-weight: 700;
  text-align: center;
  color: var(--white);
  padding: 28px 24px;
  width: 100%;
  margin: 48px 0 32px;
  background: var(--h2-b);
}

h3 {
  font-size: var(--h3-size);
  font-weight: 600;
  text-align: center;
  color: var(--white);
  padding: 20px 24px;
  width: 100%;
  margin: 32px 0 20px;
  background: var(--h3-a);
}

/* ---- Layout ---- */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-wrap {
  padding: 16px 0 40px;
}

/* ---- Navigation ---- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 9000;
  background: var(--navy);
  box-shadow: 0 2px 16px rgba(0,0,0,.45);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 68px;
  max-width: 1280px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo svg { flex-shrink: 0; }

.nav-logo-text {
  font-family: var(--font);
  font-size: 22px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: .5px;
}

.nav-logo-text span { color: var(--cyan); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  font-family: var(--font);
  font-size: 18px;
  font-weight: 500;
  color: rgba(255,255,255,.85);
  padding: 8px 12px;
  border-radius: 6px;
  transition: color .2s, background .2s;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover { color: var(--cyan); background: rgba(0,180,216,.1); }
.nav-links a.active { color: var(--cyan); }

.nav-buy-btn {
  font-family: var(--font);
  font-size: 18px;
  font-weight: 700;
  background: var(--gold);
  color: var(--navy);
  padding: 10px 22px;
  border-radius: 8px;
  text-decoration: none;
  white-space: nowrap;
  transition: background .2s, transform .15s;
  flex-shrink: 0;
}

.nav-buy-btn:hover { background: var(--gold-2); transform: translateY(-1px); color: var(--navy); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--white);
  border-radius: 3px;
  transition: all .3s;
}

/* Mobile nav */
.mobile-menu {
  display: none;
  background: var(--navy-2);
  padding: 0;
  overflow: hidden;
  max-height: 0;
  transition: max-height .4s ease;
}

.mobile-menu.open { max-height: 600px; }

.mobile-menu a {
  display: block;
  font-family: var(--font);
  font-size: 20px;
  font-weight: 500;
  color: var(--white);
  padding: 14px 24px;
  border-bottom: 1px solid rgba(255,255,255,.07);
  text-decoration: none;
  transition: background .2s;
}

.mobile-menu a:hover { background: rgba(0,180,216,.15); color: var(--cyan); }

.mobile-menu .mobile-buy {
  background: var(--gold);
  color: var(--navy);
  font-weight: 700;
  margin: 12px 20px;
  border-radius: 8px;
  text-align: center;
  border-bottom: none;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,.8);
  padding: 56px 20px 24px;
  margin-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 36px;
  max-width: 1140px;
  margin: 0 auto 40px;
}

.footer-col h4 {
  font-family: var(--font);
  font-size: 20px;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.footer-col a {
  display: block;
  font-size: 18px;
  color: rgba(255,255,255,.72);
  margin-bottom: 10px;
  text-decoration: none;
  transition: color .2s;
}

.footer-col a:hover { color: var(--cyan); }

.footer-col p {
  font-size: 18px;
  color: rgba(255,255,255,.6);
  line-height: 1.6;
}

.social-row {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  color: var(--white) !important;
  font-size: 17px;
  transition: background .2s;
}

.social-btn:hover { background: var(--cobalt-3) !important; }

.hashtag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.hashtag {
  font-size: 15px;
  background: rgba(0,180,216,.15);
  color: var(--cyan);
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 600;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  text-align: center;
  padding-top: 20px;
  font-size: 16px;
  color: rgba(255,255,255,.45);
}

.footer-bottom a { color: rgba(255,255,255,.55); margin: 0 8px; }
.footer-bottom a:hover { color: var(--cyan); }

.disclaimer {
  font-size: 14px;
  color: rgba(255,255,255,.35);
  max-width: 900px;
  margin: 12px auto 0;
  text-align: center;
  line-height: 1.5;
}

/* ---- CTA Button ---- */
.btn-primary {
  display: inline-block;
  font-family: var(--font);
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold), var(--gold-2));
  color: var(--navy);
  padding: 16px 36px;
  border-radius: 10px;
  text-decoration: none;
  transition: transform .2s, box-shadow .2s;
  box-shadow: 0 4px 18px rgba(244,200,66,.35);
  text-align: center;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(244,200,66,.5);
  color: var(--navy);
}

.btn-secondary {
  display: inline-block;
  font-family: var(--font);
  font-size: 20px;
  font-weight: 600;
  background: transparent;
  border: 2px solid var(--cyan);
  color: var(--cyan);
  padding: 12px 28px;
  border-radius: 8px;
  text-decoration: none;
  transition: background .2s, color .2s;
}

.btn-secondary:hover { background: var(--cyan); color: var(--navy); }

.cta-block {
  text-align: center;
  padding: 40px 20px;
  background: var(--off-white);
  border-top: 4px solid var(--cyan);
  border-bottom: 4px solid var(--cyan);
  margin: 40px 0;
}

/* ---- Cards ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  padding: 0 20px 32px;
  max-width: 1140px;
  margin: 0 auto;
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  transition: transform .2s, box-shadow .2s;
}

.card:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(0,0,0,.1); }

.card h4 {
  font-size: 22px;
  font-weight: 700;
  color: var(--cobalt);
  margin-bottom: 12px;
}

.card p { font-size: 20px; color: var(--text-mid); line-height: 1.6; }

/* ---- Two-column content ---- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
  padding: 0 20px;
  max-width: 1140px;
  margin: 0 auto 40px;
}

.two-col.image-left { }
.two-col.image-right { direction: rtl; }
.two-col.image-right > * { direction: ltr; }

.two-col img {
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0,0,0,.12);
  width: 100%;
}

.two-col-text h4 {
  font-size: 24px;
  font-weight: 700;
  color: var(--cobalt);
  margin-bottom: 12px;
}

.two-col-text p { font-size: 20px; color: var(--text-mid); margin-bottom: 14px; }
.two-col-text ul { padding-left: 0; }
.two-col-text li {
  font-size: 20px;
  color: var(--text-mid);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 10px;
}
.two-col-text li::before { content:'✅'; flex-shrink:0; }

/* ---- Prose sections ---- */
.prose {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

.prose p { font-size: 22px; color: var(--text-mid); margin-bottom: 20px; line-height:1.7; }
.prose ul, .prose ol {
  padding-left: 24px;
  margin-bottom: 20px;
}
.prose li { font-size: 20px; color: var(--text-mid); margin-bottom: 10px; line-height:1.65; }
.prose a { color: var(--cobalt-3); text-decoration: underline; }

/* ---- FAQ ---- */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.faq-question {
  font-size: 22px;
  font-weight: 600;
  color: var(--navy);
  padding: 18px 48px 18px 16px;
  cursor: pointer;
  position: relative;
  transition: color .2s;
  user-select: none;
  line-height: 1.4;
}

.faq-question::after {
  content: '+';
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 26px;
  color: var(--cobalt-3);
  transition: transform .3s;
}

.faq-item.open .faq-question { color: var(--cobalt-3); }
.faq-item.open .faq-question::after { content: '−'; }

.faq-answer {
  font-size: 20px;
  color: var(--text-mid);
  line-height: 1.7;
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease, padding .3s;
  padding: 0 16px;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 16px 20px;
}

/* ---- Form ---- */
.form-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

.form-group { margin-bottom: 24px; }

.form-group label {
  display: block;
  font-size: 20px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  font-family: var(--font);
  font-size: 20px;
  color: var(--text-dark);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  background: var(--white);
  transition: border-color .2s;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--cobalt-3); }

.form-group textarea { resize: vertical; min-height: 140px; }

.form-submit {
  font-family: var(--font);
  font-size: 22px;
  font-weight: 700;
  background: var(--gold);
  color: var(--navy);
  border: none;
  padding: 14px 36px;
  border-radius: 10px;
  cursor: pointer;
  transition: background .2s, transform .15s;
}

.form-submit:hover { background: var(--gold-2); transform: translateY(-1px); }

.form-note {
  font-size: 17px;
  color: var(--text-light);
  margin-top: 10px;
}

/* ---- Badges ---- */
.badge-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  padding: 20px;
  max-width: 1140px;
  margin: 0 auto 20px;
}

.badge-row img {
  height: 100px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

/* ---- Hero ---- */
.page-hero {
  background: var(--h2-a);
  padding: 0 0 0 0;
}

/* ---- Legal content ---- */
.legal-notice {
  font-size: 17px;
  background: rgba(244,200,66,.1);
  border-left: 4px solid var(--gold);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  color: var(--text-mid);
  margin-bottom: 28px;
}

/* ---- Alert / info strip ---- */
.info-strip {
  background: rgba(0,180,216,.1);
  border-left: 4px solid var(--cyan);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  font-size: 19px;
  color: var(--cobalt);
  margin-bottom: 24px;
}

/* ---- Section backgrounds alternating ---- */
.bg-navy { background: var(--navy); }
.bg-navy * { color: rgba(255,255,255,.88) !important; }
.bg-off { background: var(--off-white); }
.bg-mint { background: linear-gradient(135deg,#1a3a6e,#40916c); }
.bg-mint * { color: rgba(255,255,255,.92) !important; }

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 900px) {
  .two-col { grid-template-columns: 1fr; direction: ltr; }
  .two-col.image-right { direction: ltr; }
}

@media (max-width: 768px) {
  :root {
    --h1-size: 34px;
    --h2-size: 32px;
    --h3-size: 30px;
    --body-size: 26px;
  }

  .nav-links { display: none; }
  .nav-buy-btn { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: block; }

  .card-grid { grid-template-columns: 1fr; padding: 0 16px 24px; }

  h1 { padding: 28px 16px 24px; }
  h2 { padding: 22px 16px; margin: 36px 0 24px; }
  h3 { padding: 16px 14px; margin: 24px 0 16px; }

  .prose { padding: 0 16px 32px; }
  .faq-wrap { padding: 0 16px 36px; }
  .form-wrap { padding: 0 16px 36px; }

  .btn-primary { font-size: 20px; padding: 14px 28px; width: 100%; display: block; }
  .cta-block { padding: 28px 16px; }

  .badge-row { gap: 14px; }
  .badge-row img { height: 76px; }

  .container { padding: 0 16px; }
  .two-col { padding: 0 16px; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 430px) {
  :root {
    --h1-size: 34px;
    --h2-size: 32px;
    --h3-size: 30px;
    --body-size: 26px;
  }

  .footer-grid { grid-template-columns: 1fr; }

  .nav-logo-text { font-size: 18px; }

  h1 { font-size: 30px; padding: 22px 12px; }
  h2 { font-size: 27px; padding: 18px 12px; }
  h3 { font-size: 24px; padding: 14px 12px; }

  body { font-size: 22px; }
  .prose p, .prose li { font-size: 20px; }
  .faq-question { font-size: 20px; }
  .faq-answer { font-size: 19px; }

  .badge-row img { height: 60px; }

  .section-wrap { padding: 12px 0 28px; }
}