/* =========================================================
   Northbound Signal — base stylesheet
   Palette tokens locked in helm/landing-page-plan.md §4.
   CTA orange darkened to #C2410C for WCAG AA contrast (4.7:1 vs white).
   ========================================================= */

:root {
  /* Color palette */
  --navy: #0A2540;
  --navy-soft: #11304F;
  --navy-deep: #061A2E;
  --emerald: #0E9F6E;
  --emerald-text: #047857;        /* darker for AA contrast on light bgs and as button bg with white text */
  --emerald-soft: #ECFDF5;
  --orange: #C2410C;            /* darkened from #EA580C for AA contrast */
  --orange-hover: #9A330A;
  --text: #1E293B;
  --text-muted: #475569;
  --bg: #FAFAF9;
  --bg-soft: #F1F5F9;
  --border: #E2E8F0;
  --white: #FFFFFF;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Inter", sans-serif;
  --font-display: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Type scale */
  --text-xs: 0.875rem;
  --text-sm: 1rem;
  --text-base: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3.25rem;
  --text-5xl: 4rem;

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  /* Layout */
  --container: 72rem;
  --container-narrow: 56rem;
  --radius: 0.75rem;
  --radius-lg: 1.25rem;
  --shadow-sm: 0 1px 2px rgba(10, 37, 64, 0.06), 0 1px 1px rgba(10, 37, 64, 0.04);
  --shadow-md: 0 4px 12px rgba(10, 37, 64, 0.08), 0 2px 4px rgba(10, 37, 64, 0.04);
  --shadow-lg: 0 12px 32px rgba(10, 37, 64, 0.10), 0 4px 8px rgba(10, 37, 64, 0.06);
}

/* =========================================================
   Reset / base
   ========================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--navy);
  text-decoration-color: var(--emerald);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--emerald-text);
}

a:focus-visible,
button:focus-visible,
.btn:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Visually hidden but accessible to screen readers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =========================================================
   Layout primitives
   ========================================================= */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--navy);
  margin: 0 0 var(--space-4);
  line-height: 1.15;
  text-align: center;
}

/* =========================================================
   Header / nav
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 249, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-2) var(--space-3);
}

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
  color: var(--navy);
  text-decoration: none;
}

.nav-cta {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--navy);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border: 1.5px solid var(--navy);
  border-radius: var(--radius);
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-cta:hover {
  background: var(--navy);
  color: var(--white);
}

/* =========================================================
   Hero
   ========================================================= */

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-6) var(--space-3) var(--space-7);
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: 1.1fr 1fr;
    gap: var(--space-6);
    padding-block: var(--space-7) var(--space-8);
  }
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--emerald-text);
  background: var(--emerald-soft);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  margin: 0 0 var(--space-3);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 6vw, var(--text-5xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--navy);
  margin: 0 0 var(--space-3);
}

.hero-subhead {
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--text-muted);
  margin: 0 0 var(--space-4);
  max-width: 38rem;
}

.hero-cta-row {
  margin: 0;
}

.hero-figure {
  position: relative;
  aspect-ratio: 9 / 7;
  background: linear-gradient(135deg, var(--bg-soft), var(--emerald-soft));
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* If hero image hasn't been generated yet, the gradient placeholder shows.
   Once /assets/hero.webp is added, it covers the gradient automatically. */

/* =========================================================
   Buttons
   ========================================================= */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  padding: 0.95rem 1.6rem;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--orange);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(194, 65, 12, 0.25);
}

.btn-primary:hover {
  background: var(--orange-hover);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(194, 65, 12, 0.30);
}

.btn-large {
  font-size: var(--text-lg);
  padding: 1.1rem 2rem;
}

/* =========================================================
   Problem section (3 cards)
   ========================================================= */

.problem {
  padding-block: var(--space-7);
  background: var(--white);
  border-block: 1px solid var(--border);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 720px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }
}

.card {
  padding: var(--space-4);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-top: 4px solid var(--emerald);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 var(--space-1);
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--text-base);
}

/* =========================================================
   Process (numbered steps + privacy aside)
   ========================================================= */

.process {
  padding-block: var(--space-7);
  background: var(--bg);
}

.steps {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-5);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  counter-reset: step;
}

@media (min-width: 720px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

@media (min-width: 1100px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.steps li {
  position: relative;
  padding: var(--space-4) var(--space-3);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.steps h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 var(--space-1);
  letter-spacing: -0.01em;
}

.steps p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.55;
}

.privacy {
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 4px solid var(--emerald);
  border-radius: var(--radius);
  padding: var(--space-4);
  max-width: var(--container-narrow);
  margin-inline: auto;
}

.privacy h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 var(--space-2);
  letter-spacing: -0.01em;
}

.privacy ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.privacy li::marker {
  color: var(--emerald);
}

/* =========================================================
   About (featured founder note)
   ========================================================= */

.about {
  padding-block: var(--space-7);
  background: color-mix(in srgb, var(--bg) 94%, var(--emerald-text) 6%);
  border-block: 1px solid var(--border);
}

.about-card {
  display: grid;
  gap: var(--space-4);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow:
    0 1px 2px color-mix(in srgb, var(--navy) 6%, transparent),
    0 1px 1px color-mix(in srgb, var(--navy) 4%, transparent);
}

.about-meta {
  min-width: 0;
}

.about-eyebrow {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--emerald-text);
  margin: 0 0 var(--space-1);
}

.about-heading {
  font-family: var(--font-display);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 700;
  line-height: 1.15;
  color: var(--navy);
  margin: 0 0 var(--space-1);
}

.about-subhead {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--navy) 72%, var(--bg) 28%);
  margin: 0;
}

.about-body {
  display: grid;
  gap: var(--space-3);
  min-width: 0;
}

.about-body p {
  font-size: var(--text-base);
  line-height: 1.7;
  color: color-mix(in srgb, var(--navy) 84%, var(--bg) 16%);
  margin: 0;
}

@media (min-width: 800px) {
  .about-card {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.4fr);
    align-items: start;
    gap: var(--space-5);
    padding: var(--space-5);
  }
}

@media (max-width: 719px) {
  .about {
    padding-block: var(--space-6);
  }

  .about-card {
    padding: var(--space-3);
  }

  .about-heading {
    font-size: var(--text-2xl);
  }
}


/* Anchor sentence after the 3 problem cards */
.problem-anchor {
  max-width: 42rem;
  margin: var(--space-4) auto 0;
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-base);
  line-height: 1.6;
}

/* =========================================================
   FAQ
   ========================================================= */

.faq {
  padding-block: var(--space-7);
  background: var(--bg);
}

.faq-list {
  max-width: var(--container-narrow);
  margin: 0 auto;
  display: grid;
  gap: var(--space-1);
}

.faq details {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: box-shadow 0.15s ease;
}

.faq details[open] {
  box-shadow: var(--shadow-sm);
  border-color: var(--emerald);
}

.faq summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-3);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--navy);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--emerald-text);
  transition: transform 0.15s ease;
  flex: 0 0 auto;
}

.faq details[open] summary::after {
  content: "\2212";
  transform: none;
}

.faq-body {
  padding: 0 var(--space-3) var(--space-3);
}

.faq-body p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
}

/* =========================================================
   Pricing
   ========================================================= */

.pricing {
  padding-block: var(--space-7);
  background: var(--white);
  border-block: 1px solid var(--border);
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

@media (min-width: 800px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
    align-items: stretch;
  }
}

.tier {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.tier-eyebrow {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--emerald-text);
  margin: 0 0 var(--space-1);
}

.tier-name {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}

.tier-tagline {
  margin: 0 0 var(--space-2);
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.tier-price {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 var(--space-3);
  letter-spacing: -0.02em;
}

.tier-price-range {
  color: var(--text-muted);
  font-weight: 500;
  font-size: var(--text-lg);
}

.tier-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.6rem;
}

.tier-list li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--text);
  font-size: var(--text-sm);
}

.tier-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--emerald);
}

.pricing-sub {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-style: italic;
  margin: 0 0 var(--space-4);
}

.guarantee {
  max-width: var(--container-narrow);
  margin: 0 auto;
  background: var(--navy);
  color: var(--white);
  padding: var(--space-4);
  border-radius: var(--radius);
  text-align: center;
}

.guarantee h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--white);
  margin: 0 0 var(--space-1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.guarantee p {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.92);
}

/* =========================================================
   Final CTA
   ========================================================= */

.cta-final {
  padding-block: var(--space-7);
  background: linear-gradient(160deg, var(--bg) 0%, var(--emerald-soft) 100%);
  text-align: center;
}

.cta-final-sub {
  max-width: 38rem;
  margin: 0 auto var(--space-4);
  color: var(--text-muted);
  font-size: var(--text-lg);
}

/* =========================================================
   Footer
   ========================================================= */

.site-footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.85);
  padding-block: var(--space-5);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  align-items: flex-start;
}

@media (min-width: 720px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
  }
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--white);
  margin: 0;
}

.footer-contact {
  margin: 0;
  font-size: var(--text-sm);
}

.footer-contact a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration-color: var(--emerald);
}

.footer-contact a:hover {
  color: var(--white);
}

.footer-copy {
  margin: 0;
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
}

/* =========================================================
   404 page
   ========================================================= */

.error-page {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-6) var(--space-3);
}

.error-code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 0 0 var(--space-2);
}

.error-message {
  font-size: var(--text-lg);
  color: var(--text-muted);
  max-width: 28rem;
  margin: 0 0 var(--space-4);
}