/* =====================
   Custom Properties
   ===================== */
:root {
  --navy:       #0f1f3d;
  --navy-dark:  #0a1628;
  --teal:       #4a9ead;
  --white:      #ffffff;
  --off-white:  #f8f9fb;
  --border:     #e0e6ed;
  --muted:      #b0bec5;
  --body-text:  #444444;
  --slate:      #607d8b;

  --font: Arial, Helvetica, sans-serif;
  --max-width: 900px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--body-text);
  background: var(--white);
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

/* =====================
   Typography
   ===================== */
h1 {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.15;
}

h2 {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.2;
}

h3 {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.3;
}

/* =====================
   Shared Layout
   ===================== */
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 32px;
}

.section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 12px;
}

/* =====================
   Buttons
   ===================== */
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 5px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s ease;
  border: none;
}

.btn:hover {
  opacity: 0.88;
}

.btn-primary {
  background: var(--teal);
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--teal);
  border: 1.5px solid var(--teal);
}

/* =====================
   Navigation
   ===================== */
#nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  border-bottom: 1px solid #1e3a5f;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-wordmark {
  font-size: 1rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.1em;
}

.nav-cta {
  padding: 8px 18px;
  font-size: 0.85rem;
}

/* =====================
   Hero
   ===================== */
#hero {
  background: var(--navy);
  border-bottom: 2px solid var(--teal);
  text-align: center;
}

.hero-inner {
  padding-top: 72px;
  padding-bottom: 72px;
}

#hero h1 {
  color: var(--white);
  margin-bottom: 20px;
}

.hero-sub {
  color: var(--muted);
  font-size: 1rem;
  max-width: 540px;
  margin: 0 auto 32px;
}

.hero-ctas {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* =====================
   Problem
   ===================== */
#problem {
  background: var(--off-white);
}

#problem h2 {
  color: var(--navy);
  margin-bottom: 32px;
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.problem-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 3px solid var(--teal);
  border-radius: 4px;
  padding: 20px;
}

.problem-card h3 {
  color: var(--navy);
  margin-bottom: 6px;
}

.problem-card p {
  font-size: 0.875rem;
  color: var(--slate);
}

/* =====================
   Solution
   ===================== */
#solution {
  background: var(--navy);
  text-align: center;
}

.solution-inner {
  padding-top: 64px;
  padding-bottom: 64px;
}

#solution h2 {
  color: var(--white);
  margin-bottom: 16px;
}

.solution-body {
  color: var(--muted);
  max-width: 580px;
  margin: 0 auto;
  font-size: 0.975rem;
}

/* =====================
   Product
   ===================== */
#product {
  background: var(--white);
  border-top: 1px solid var(--border);
}

#product h2 {
  color: var(--navy);
  margin-bottom: 28px;
}

.product-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.product-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.check {
  color: var(--teal);
  font-size: 1.25rem;
  line-height: 1.3;
  flex-shrink: 0;
}

.product-item strong {
  display: block;
  color: var(--navy);
  margin-bottom: 4px;
}

.product-item p {
  font-size: 0.875rem;
  color: var(--slate);
  margin: 0;
}

/* =====================
   Credibility
   ===================== */
#credibility {
  background: var(--off-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.credibility-inner {
  padding-top: 64px;
  padding-bottom: 64px;
}

#credibility h2 {
  color: var(--navy);
  margin-bottom: 16px;
}

.credibility-body {
  color: var(--body-text);
  max-width: 580px;
  margin: 0 auto 28px;
  font-size: 0.975rem;
}

.credential-badges {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.badge {
  background: var(--white);
  border: 1px solid var(--border);
  border-top: 3px solid var(--teal);
  border-radius: 4px;
  padding: 10px 20px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--navy);
}

/* =====================
   Buy
   ===================== */
#buy {
  background: var(--navy);
  text-align: center;
}

.buy-inner {
  padding-top: 72px;
  padding-bottom: 72px;
}

#buy h2 {
  color: var(--white);
  margin-bottom: 10px;
}

.buy-tagline {
  color: var(--muted);
  font-size: 0.925rem;
  margin-bottom: 24px;
}

.buy-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--teal);
  margin-bottom: 24px;
}

.buy-btn {
  font-size: 1rem;
  padding: 15px 36px;
  margin-bottom: 14px;
}

.buy-note {
  font-size: 0.8rem;
  color: var(--slate);
}

/* =====================
   Email Capture
   ===================== */
#email-capture {
  background: var(--off-white);
  border-top: 1px solid var(--border);
  text-align: center;
}

.email-inner {
  padding-top: 64px;
  padding-bottom: 64px;
}

#email-capture h2 {
  color: var(--navy);
  margin-bottom: 12px;
}

.email-body {
  color: var(--body-text);
  max-width: 440px;
  margin: 0 auto 28px;
  font-size: 0.925rem;
}

.kit-form-wrapper {
  max-width: 480px;
  margin: 0 auto;
}

.kit-form-wrapper form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

/* =====================
   Footer
   ===================== */
#footer {
  background: var(--navy-dark);
  padding: 24px 32px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-wordmark {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--slate);
}

/* =====================
   Responsive
   ===================== */

/* Tablet (768px and below) */
@media (max-width: 768px) {
  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .section-inner {
    padding: 48px 24px;
  }

  .hero-inner,
  .solution-inner,
  .buy-inner,
  .credibility-inner,
  .email-inner {
    padding-top: 52px;
    padding-bottom: 52px;
  }

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

  .hero-ctas {
    flex-direction: column;
    align-items: center;
  }

  .credential-badges {
    flex-direction: column;
    align-items: center;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }

  .section-inner {
    padding: 40px 20px;
  }

  .nav-inner {
    padding: 12px 20px;
  }

  .buy-price {
    font-size: 2.5rem;
  }

  .kit-form-wrapper form {
    flex-direction: column;
    align-items: stretch;
  }
}