/* ============================================
   ELEVATED ROOF MARKETING — Navigation
   Desktop + Mobile Nav, Scroll Behavior
   ============================================ */

/* ---- Header / Outer Wrapper ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

/* ---- Nav Element ---- */
.nav {
  width: 100%;
  height: var(--nav-height);
}

/* ---- Nav Container ---- */
.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
}

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

.nav__logo-img {
  height: 44px;
  width: auto;
}

/* ---- Desktop Links ---- */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__link {
  position: relative;
  color: var(--color-white);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  font-family: var(--font-heading);
  transition: color var(--transition-fast);
  padding: 4px 0;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-teal);
  text-decoration: none;
}

/* Active link indicator */
.nav__link--active::after,
.nav__link:hover::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--color-teal);
}

/* ---- Desktop CTA ---- */
.nav__cta {
  flex-shrink: 0;
}

/* ---- Scrolled State ---- */
.nav--scrolled {
  background: rgba(11, 29, 58, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

/* ---- Hamburger Button ---- */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  padding: 4px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: calc(var(--z-overlay) + 1);
}

.nav__hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

/* Hamburger to X animation */
.nav__hamburger--active .nav__hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav__hamburger--active .nav__hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav__hamburger--active .nav__hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ---- Mobile Menu Panel ---- */
.nav__mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: rgba(7, 21, 39, 0.98);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  transform: translateX(100%);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

.nav__mobile-menu--open {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

/* ---- Mobile Links ---- */
.nav__mobile-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__mobile-link {
  font-size: var(--text-2xl);
  font-family: var(--font-heading);
  font-weight: var(--weight-semibold);
  color: var(--color-white);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: var(--space-xs) 0;
}

.nav__mobile-link:hover {
  color: var(--color-teal);
  text-decoration: none;
}

/* ---- Mobile CTA ---- */
.nav__mobile-cta {
  margin-top: var(--space-lg);
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .nav__cta {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__container {
    padding: 0 var(--space-md);
  }
}

@media (max-width: 480px) {
  .nav__logo-img {
    height: 36px;
  }

  .nav__mobile-link {
    font-size: var(--text-xl);
  }
}