/* ═══ COLOR FLOW MAP (from design-spec.theme_context_map) ═══
 * NAV: always-dark (#0F172A solid) — logo-light.svg on ALL pages
 *
 * index.html:
 *   nav        → solid dark (#0F172A) | text: white
 *   hero       → DARK  (#0F172A)      | text: white
 *   logos      → DARK-ALT (#1E293B)   | text: white-muted
 *   problem    → DARK  (#0F172A)      | text: white
 *   product-showcase → DARK-ALT      | text: white
 *   behaviors  → DARK  (#0F172A)      | text: white
 *   metrics    → BRAND (blue gradient)| text: white
 *   testimonials → DARK-ALT          | text: white
 *   how-it-works → DARK              | text: white
 *   cta-bottom → DARK-ALT            | text: white
 *   footer     → DARK  (#0F172A)      | text: white-muted
 *
 * blog/post.html, legal/*.html:
 *   nav        → solid dark (#0F172A) | text: white (always-dark nav)
 *   hero/header → LIGHT (#F8FAFC)     | text: dark
 *   body       → LIGHT (#F8FAFC)      | text: dark
 *   footer     → DARK  (#0F172A)      | text: white-muted
 *
 * Adjacent same-polarity: dark→dark sections separated by bg shade step
 * ═══════════════════════════════════════════════════════════════════════ */

/* ── DESIGN TOKENS ───────────────────────────────────────────────── */
:root {
  /* Brand palette */
  --cvyn-navy:          #0F172A;
  --cvyn-navy-alt:      #1E293B;
  --cvyn-navy-card:     #1E3A5F;
  --cvyn-blue:          #3B82F6;
  --cvyn-blue-light:    #60A5FA;
  --cvyn-blue-aa:       #1D4ED8;
  --cvyn-green:         #10B981;
  --cvyn-green-aa:      #34D399;
  --cvyn-amber:         #F59E0B;

  /* Foreground tokens */
  --cvyn-fg-dark-pri:   #F1F5F9;
  --cvyn-fg-dark-sec:   #94A3B8;
  --cvyn-fg-light-pri:  #0F172A;
  --cvyn-fg-light-sec:  #475569;

  /* Background tokens */
  --cvyn-bg-dark:       #0F172A;
  --cvyn-bg-dark-alt:   #1E293B;
  --cvyn-bg-card:       #1E3A5F;
  --cvyn-bg-light:      #F8FAFC;
  --cvyn-bg-light-alt:  #F1F5F9;
  --cvyn-bg-white:      #FFFFFF;

  /* Border */
  --cvyn-border-dark:   rgba(255,255,255,0.08);
  --cvyn-border-light:  rgba(15,23,42,0.12);

  /* Typography */
  --cvyn-font-sans:     'Inter', system-ui, -apple-system, sans-serif;
  --cvyn-font-mono:     'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --cvyn-section-pad:   120px;
  --cvyn-section-pad-sm: 64px;
  --cvyn-container:     1200px;
  --cvyn-container-wide: 1440px;
  --cvyn-nav-height:    64px;
  --cvyn-radius:        8px;
  --cvyn-radius-lg:     12px;
  --cvyn-radius-xl:     16px;
}

/* ── RESET & BASE ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--cvyn-font-sans);
  font-size: 1rem;
  line-height: 1.6;
  background: var(--cvyn-bg-dark);
  color: var(--cvyn-fg-dark-pri);
  -webkit-font-smoothing: antialiased;
}

/* Light-top pages override body bg so nav transparent state shows correct bg */
body.cvyn-page--light-top {
  background: var(--cvyn-bg-light);
  color: var(--cvyn-fg-light-pri);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }

/* ── TYPOGRAPHY ──────────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--cvyn-font-sans);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); font-weight: 700; }
h4 { font-size: 1.125rem; font-weight: 700; }

p { line-height: 1.65; }

.cvyn-mono { font-family: var(--cvyn-font-mono); }

/* ── CONTAINERS ──────────────────────────────────────────────────── */
.cvyn-container {
  max-width: var(--cvyn-container);
  margin: 0 auto;
  padding: 0 24px;
}

.cvyn-container--wide {
  max-width: var(--cvyn-container-wide);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── SECTION THEMES ──────────────────────────────────────────────── */
.cvyn-section--dark {
  background: var(--cvyn-bg-dark);
  color: var(--cvyn-fg-dark-pri);
}

.cvyn-section--dark-alt {
  background: var(--cvyn-bg-dark-alt);
  color: var(--cvyn-fg-dark-pri);
}

.cvyn-section--brand {
  background: linear-gradient(135deg, #1D4ED8 0%, #2563EB 50%, #3B82F6 100%);
  color: #fff;
}

.cvyn-section--light {
  background: var(--cvyn-bg-light);
  color: var(--cvyn-fg-light-pri);
}

.cvyn-section--light-alt {
  background: var(--cvyn-bg-light-alt);
  color: var(--cvyn-fg-light-pri);
}

/* ── EYEBROW / LABEL ─────────────────────────────────────────────── */
.cvyn-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

/* Eyebrow on dark sections */
.cvyn-section--dark .cvyn-eyebrow,
.cvyn-section--dark-alt .cvyn-eyebrow,
.cvyn-hero .cvyn-eyebrow {
  color: var(--cvyn-blue-light);
}

/* Eyebrow on brand section */
.cvyn-section--brand .cvyn-eyebrow {
  color: rgba(255,255,255,0.8);
}

/* Eyebrow on light sections */
.cvyn-section--light .cvyn-eyebrow,
.cvyn-section--light-alt .cvyn-eyebrow,
body.cvyn-page--light-top .cvyn-eyebrow {
  color: var(--cvyn-blue-aa);
}

/* ── SECTION HEADERS ─────────────────────────────────────────────── */
.cvyn-section-header {
  max-width: 760px;
  margin-bottom: 3rem;
}

.cvyn-section-header--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.cvyn-section-header p {
  margin-top: 1rem;
  font-size: 1.125rem;
}

.cvyn-section--dark .cvyn-section-header p,
.cvyn-section--dark-alt .cvyn-section-header p {
  color: var(--cvyn-fg-dark-sec);
}

.cvyn-section--light .cvyn-section-header p,
.cvyn-section--light-alt .cvyn-section-header p {
  color: var(--cvyn-fg-light-sec);
}

/* ── BUTTONS ─────────────────────────────────────────────────────── */
.cvyn-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.75rem 1.5rem;
  border-radius: var(--cvyn-radius);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: all 0.2s ease;
  border: 2px solid transparent;
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
  white-space: nowrap;
}

.cvyn-btn--primary {
  background: var(--cvyn-blue);
  color: #fff;
  border-color: var(--cvyn-blue);
}
.cvyn-btn--primary:hover {
  background: #2563EB;
  border-color: #2563EB;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(59,130,246,0.35);
}

.cvyn-btn--outline-dark {
  background: transparent;
  color: var(--cvyn-fg-dark-pri);
  border-color: var(--cvyn-border-dark);
}
.cvyn-btn--outline-dark:hover {
  border-color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.05);
}

.cvyn-btn--ghost-dark {
  background: transparent;
  color: var(--cvyn-blue-light);
  border-color: transparent;
  padding-left: 0;
  padding-right: 0;
}
.cvyn-btn--ghost-dark:hover { color: #fff; }

.cvyn-btn--ghost-light {
  background: transparent;
  color: var(--cvyn-blue-aa);
  border-color: transparent;
}
.cvyn-btn--ghost-light:hover { color: var(--cvyn-navy); }

.cvyn-btn--lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.cvyn-btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* ── NAVIGATION ──────────────────────────────────────────────────── */
.cvyn-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--cvyn-nav-height);
  background: var(--cvyn-bg-dark);
  border-bottom: 1px solid var(--cvyn-border-dark);
  display: flex;
  align-items: center;
}

.cvyn-nav__inner {
  max-width: var(--cvyn-container);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.cvyn-nav__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.cvyn-nav__logo img {
  height: 30px;
  width: auto;
  max-width: 180px;
}

.cvyn-nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.cvyn-nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--cvyn-fg-dark-sec);
  padding: 0.5rem 0.875rem;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.cvyn-nav__link:hover {
  color: var(--cvyn-fg-dark-pri);
  background: rgba(255,255,255,0.06);
}

.cvyn-nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: 1.5rem;
  flex-shrink: 0;
}

.cvyn-nav__signin {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--cvyn-fg-dark-sec);
  padding: 0.5rem 0.875rem;
  border-radius: 6px;
  transition: color 0.15s;
}
.cvyn-nav__signin:hover { color: var(--cvyn-fg-dark-pri); }

/* S11 fix: body.cvyn-page--light-top color + a { color:inherit } has specificity 0,1,1
   which beats .cvyn-nav__link (0,1,0). Lift to 0,2,0 with body class prefix. */
body.cvyn-page--light-top .cvyn-nav__link {
  color: var(--cvyn-fg-dark-sec);
}
body.cvyn-page--light-top .cvyn-nav__link:hover {
  color: var(--cvyn-fg-dark-pri);
  background: rgba(255,255,255,0.06);
}
body.cvyn-page--light-top .cvyn-nav__signin {
  color: var(--cvyn-fg-dark-sec);
}
body.cvyn-page--light-top .cvyn-nav__signin:hover {
  color: var(--cvyn-fg-dark-pri);
}

/* Mobile hamburger */
.cvyn-nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 8px;
  margin-left: auto;
}

.cvyn-nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--cvyn-fg-dark-pri);
  border-radius: 2px;
  transition: all 0.25s;
}

/* Mobile menu */
.cvyn-nav__mobile {
  display: none;
  position: fixed;
  top: var(--cvyn-nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--cvyn-bg-dark);
  z-index: 999;
  padding: 2rem 24px;
  flex-direction: column;
  gap: 0.5rem;
  overflow-y: auto;
}

.cvyn-nav__mobile.is-open { display: flex; }

.cvyn-nav__mobile-link {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--cvyn-fg-dark-pri);
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--cvyn-border-dark);
}

.cvyn-nav__mobile-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* ── FOOTER ──────────────────────────────────────────────────────── */
.cvyn-footer {
  background: var(--cvyn-bg-dark);
  border-top: 1px solid var(--cvyn-border-dark);
  padding: 80px 0 0;
}

.cvyn-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--cvyn-border-dark);
}

.cvyn-footer__brand p {
  color: var(--cvyn-fg-dark-sec);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-top: 1rem;
  max-width: 280px;
}

.cvyn-footer__logo {
  height: 28px;
  width: auto;
}

.cvyn-footer__col-heading {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cvyn-fg-dark-pri);
  margin-bottom: 1.25rem;
}

.cvyn-footer__col-links {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.cvyn-footer__col-links a {
  font-size: 0.9rem;
  color: var(--cvyn-fg-dark-sec);
  transition: color 0.15s;
}
.cvyn-footer__col-links a:hover { color: var(--cvyn-fg-dark-pri); }

.cvyn-footer__legal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.5rem 0;
}

.cvyn-footer__copyright {
  font-size: 0.85rem;
  color: var(--cvyn-fg-dark-sec);
}

.cvyn-footer__legal-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.cvyn-footer__legal-links a {
  font-size: 0.85rem;
  color: var(--cvyn-fg-dark-sec);
  transition: color 0.15s;
}
.cvyn-footer__legal-links a:hover { color: var(--cvyn-fg-dark-pri); }

/* ── COOKIE BANNER ───────────────────────────────────────────────── */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: var(--cvyn-bg-dark-alt);
  border-top: 1px solid var(--cvyn-border-dark);
  padding: 1rem 0;
}

.cookie-banner__inner {
  max-width: var(--cvyn-container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.cookie-banner__text {
  font-size: 0.9rem;
  color: var(--cvyn-fg-dark-sec);
  flex: 1;
  min-width: 200px;
}

.cookie-banner__text a {
  color: var(--cvyn-blue-light);
  text-decoration: underline;
}

.cookie-banner__actions { flex-shrink: 0; }

.cookie-banner__btn {
  padding: 0.5rem 1.25rem;
  border-radius: var(--cvyn-radius);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}

.cookie-banner__btn--primary {
  background: var(--cvyn-blue);
  color: #fff;
  border: none;
}
.cookie-banner__btn--primary:hover { background: #2563EB; }

/* ── METRIC / STAT CARDS ─────────────────────────────────────────── */
.cvyn-metric-number {
  font-family: var(--cvyn-font-mono);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--cvyn-blue-light);
  line-height: 1;
  letter-spacing: -0.02em;
}

/* Metric number on brand-bg section */
.cvyn-section--brand .cvyn-metric-number { color: #fff; }

/* ── CARDS ───────────────────────────────────────────────────────── */
.cvyn-card {
  background: var(--cvyn-bg-dark-alt);
  border: 1px solid var(--cvyn-border-dark);
  border-radius: var(--cvyn-radius-lg);
  padding: 32px;
  transition: border-color 0.2s, transform 0.2s;
}

.cvyn-card:hover {
  border-color: rgba(59,130,246,0.3);
  transform: translateY(-2px);
}

.cvyn-card--dark {
  background: var(--cvyn-bg-dark-alt);
  border-color: var(--cvyn-border-dark);
}

.cvyn-card--blue {
  background: var(--cvyn-bg-card);
  border-color: rgba(59,130,246,0.2);
}

/* ── TAGS / BADGES ───────────────────────────────────────────────── */
.cvyn-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.cvyn-tag--blue {
  background: rgba(59,130,246,0.15);
  color: var(--cvyn-blue-light);
}

.cvyn-tag--green {
  background: rgba(16,185,129,0.15);
  color: var(--cvyn-green-aa);
}

.cvyn-tag--amber {
  background: rgba(245,158,11,0.15);
  color: var(--cvyn-amber);
}

/* ── DIVIDERS ────────────────────────────────────────────────────── */
.cvyn-divider {
  border: none;
  border-top: 1px solid var(--cvyn-border-dark);
  margin: 0;
}

/* ── UTILITY ─────────────────────────────────────────────────────── */
.cvyn-text-muted { color: var(--cvyn-fg-dark-sec); }
.cvyn-text-accent { color: var(--cvyn-blue-light); }
.cvyn-text-green { color: var(--cvyn-green-aa); }
.cvyn-text-amber { color: var(--cvyn-amber); }

.cvyn-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* ── RESPONSIVE ──────────────────────────────────────────────────── */
@media (max-width: 1200px) {
  :root { --cvyn-section-pad: 96px; }

  .cvyn-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  :root { --cvyn-section-pad: 64px; }

  .cvyn-nav__links,
  .cvyn-nav__actions { display: none; }

  .cvyn-nav__hamburger { display: flex; }

  .cvyn-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .cvyn-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .cvyn-footer__grid {
    grid-template-columns: 1fr;
  }

  .cvyn-footer__legal {
    flex-direction: column;
    align-items: flex-start;
  }
}