/* =========================================================================
   Growth Club — Chrome (header + footer)
   Canonical UI Kit nav + 4-column foot-top pattern.
   Light-first site: nav carries data-theme="dark" locally (preto translucido
   sticky por cima de qualquer fundo); footer usa bg-void (Pub Cream sunken
   no light, Growth Black no dark).
   ========================================================================= */

/* =========================================================================
   HEADER — sticky, blurred, dark overlay
   ========================================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: var(--bg-overlay-dark);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: var(--space-5);
}
.nav-logo {
  display: inline-flex;
  align-items: center;
}
.nav-logo img {
  height: 22px;
  width: auto;
}
.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  font-size: 14px;
  color: var(--fg-secondary);
  font-weight: 500;
  transition: color 160ms var(--ease-out);
  text-decoration: none;
}
.nav-links a:hover,
.nav-links a.active,
.nav-links a[aria-current="page"] {
  color: var(--fg-primary);
}
.nav-cta {
  background: var(--accent-amber);
  color: var(--fg-inverse);
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: 500;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: 160ms var(--ease-out);
  text-decoration: none;
  border: 1px solid transparent;
}
.nav-cta:hover {
  background: var(--accent-amber-bright);
  box-shadow: var(--glow-amber);
  color: var(--fg-inverse);
}
.nav-cta svg {
  width: 14px;
  height: 14px;
  stroke-width: 2;
}

/* Mobile toggle */
.nav-mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-default);
  color: var(--fg-primary);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-mobile-toggle { display: inline-flex; }

  .nav[data-mobile-open="true"] .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-base);
    border-bottom: 1px solid var(--border-default);
    padding: 20px 40px 24px;
    align-items: flex-start;
    gap: 16px;
  }
  .nav[data-mobile-open="true"] .nav-cta {
    display: inline-flex;
    position: absolute;
    top: calc(100% + 280px);
    left: 40px;
  }
}

/* =========================================================================
   FOOTER — 4 columns + foot-bottom mono
   ========================================================================= */
footer.gc-footer {
  background: var(--bg-void);
  padding: 64px 0 32px;
  border-top: 1px solid var(--border-subtle);
  margin-top: 0;
}
.foot-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-subtle);
}
.foot-brand img {
  height: 24px;
  width: auto;
  margin-bottom: 16px;
}
.foot-brand p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--fg-tertiary);
  max-width: 34ch;
}
.foot-col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-tertiary);
  margin-bottom: 16px;
  font-weight: 500;
}
.foot-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0;
  margin: 0;
}
.foot-col a {
  font-size: 14px;
  color: var(--fg-secondary);
  transition: color 160ms;
  text-decoration: none;
}
.foot-col a:hover { color: var(--accent-amber); }

.foot-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
  flex-wrap: wrap;
}
.foot-bottom .amber { color: var(--accent-amber); }

.foot-legal {
  padding-top: 12px;
  display: flex;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.06em;
  flex-wrap: wrap;
}
.foot-legal a {
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 160ms;
}
.foot-legal a:hover { color: var(--fg-tertiary); }
.foot-legal .sep { color: var(--border-strong); }

@media (max-width: 880px) {
  .foot-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 540px) {
  .foot-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .foot-bottom {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
}