/**
 * Navigation Component
 * Based on FERNI-BRAND-GUIDELINES.md Section 8
 */

/* ============================================
   MAIN NAV
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-4) 0;
  background: var(--color-bg-overlay);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: 
    padding var(--duration-slow) var(--ease-ease-out),
    background var(--duration-slow) var(--ease-ease-out);
}

.nav.is-scrolled {
  padding: var(--space-3) 0;
  background: rgba(250, 248, 245, 0.98);
  box-shadow: var(--shadow-sm);
}

/* Hide nav on scroll down (mobile) */
.nav.is-hidden {
  transform: translateY(-100%);
}

/* ============================================
   NAV INNER
   ============================================ */

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ============================================
   LOGO
   ============================================ */

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  text-decoration: none;
}

.nav-logo:hover .logo-mark {
  transform: scale(1.05);
}

/* Logo mark - rounded square with FN */
.logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(
    145deg,
    var(--color-ferni) 0%,
    var(--color-ferni-secondary) 100%
  );
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  transition: 
    transform var(--duration-fast) var(--ease-ease-out-back),
    box-shadow var(--duration-normal) var(--ease-ease-out);
}

.nav-logo:hover .logo-mark {
  box-shadow: 
    0 4px 16px var(--color-ferni-glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.logo-text {
  letter-spacing: -0.01em;
}

/* ============================================
   NAV LINKS
   ============================================ */

.nav-links {
  display: none; /* Hidden on mobile */
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 769px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--duration-fast) var(--ease-ease-out);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--duration-normal) var(--ease-ease-out);
}

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

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.is-active {
  color: var(--color-accent);
}

.nav-link.is-active::after {
  transform: scaleX(1);
}

/* ============================================
   NAV ACTIONS
   ============================================ */

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Phone link in nav */
.nav-phone {
  display: none;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

@media (min-width: 769px) {
  .nav-phone {
    display: flex;
  }
}

.nav-phone svg {
  opacity: 0.7;
}

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

/* Nav CTA button */
.btn-nav {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  padding: var(--space-2_5) var(--space-5);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  transition: all var(--duration-normal) var(--ease-ease-out);
  box-shadow: 0 2px 8px var(--color-accent-glow);
}

.btn-nav:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--color-accent-glow);
}

/* ============================================
   MOBILE MENU BUTTON
   ============================================ */

.nav-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  padding: var(--space-1_5);
  background: none;
  border: none;
  cursor: pointer;
}

@media (min-width: 769px) {
  .nav-menu-btn {
    display: none;
  }
}

.nav-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: var(--radius-xs);
  transition: all var(--duration-fast) var(--ease-ease-out);
}

/* Hamburger to X animation */
.nav.is-menu-open .nav-menu-btn span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav.is-menu-open .nav-menu-btn span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* ============================================
   MOBILE MENU
   ============================================ */

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg-elevated);
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-lg);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-slow) var(--ease-ease-out);
}

.nav.is-menu-open .mobile-menu {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu .nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-link {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.mobile-link:last-child {
  border-bottom: none;
}