/* ============================================
   AURALEN SPARK — Navigation & Footer
   ============================================ */

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(13,13,15,0.06);
  transition: background var(--transition-slow), backdrop-filter var(--transition-slow),
              box-shadow var(--transition-slow);
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 16px rgba(13,13,15,0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 42px;
  width: auto;
  display: block;
  border-radius: 8px;
}

/* Desktop Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-spark-teal);
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--color-text-primary);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--color-spark-teal);
}

.nav-link.active::after {
  width: 100%;
}

/* Nav CTA */
.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Mobile Menu Button */
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
}

.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-secondary);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.nav-mobile-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-mobile-toggle.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-mobile-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu Overlay */
.nav-mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(249,250,251,0.98);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  display: none;
  flex-direction: column;
  padding: var(--space-8) var(--space-6);
  z-index: 999;
  overflow-y: auto;
}

.nav-mobile-menu.open {
  display: flex;
}

.nav-mobile-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: var(--space-8);
}

.nav-mobile-link {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-4) 0;
  border-bottom: 1px solid rgba(13,13,15,0.08);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-mobile-link:hover,
.nav-mobile-link.active {
  color: var(--color-spark-teal);
}

.nav-mobile-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-6);
}

.nav-mobile-cta .btn {
  width: 100%;
  justify-content: center;
}

.nav-mobile-social {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  padding-top: var(--space-4);
  border-top: 1px solid rgba(13,13,15,0.08);
  margin-top: var(--space-2);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background: var(--color-mist-white);
  border-top: 1px solid rgba(13,13,15,0.08);
  padding-top: var(--space-20);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-12);
  padding-bottom: var(--space-16);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.footer-brand-logo {
  display: inline-block;
  text-decoration: none;
  margin-bottom: var(--space-4);
}

.footer-logo-img {
  height: 64px;
  width: auto;
  display: block;
  border-radius: 10px;
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.footer-social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(13,13,15,0.04);
  border: var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.footer-social-link:hover {
  background: rgba(61,224,212,0.12);
  border-color: rgba(61,224,212,0.35);
  color: var(--color-spark-teal);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-5);
  letter-spacing: 0.02em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  line-height: 1;
}

.footer-link:hover {
  color: var(--color-teal-400);
}

.footer-bottom {
  border-top: 1px solid rgba(13,13,15,0.08);
  padding: var(--space-6) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer-copyright {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-legal {
  display: flex;
  gap: var(--space-6);
}

.footer-legal-link {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-legal-link:hover {
  color: var(--color-text-secondary);
}

/* ============================================
   RESPONSIVE NAV / FOOTER
   ============================================ */

@media (max-width: 1024px) {
  .nav-links {
    gap: var(--space-6);
  }
}

@media (max-width: 900px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-mobile-toggle {
    display: flex;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  .nav-inner {
    padding: 0 var(--space-5);
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }

  .footer-legal {
    gap: var(--space-4);
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 400px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
}