/* ============================================================
   NAVBAR — Pack2Door
   Sticky navigation with scroll-to-white behavior
   ============================================================ */

/* ── Base Navbar ─────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background-color var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
  background-color: transparent;
  border-bottom: 1px solid transparent;
}

/* Scrolled state */
.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.05);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* ── Logo ────────────────────────────────────────────────── */
.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.navbar-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
}

.navbar-logo-icon svg {
  width: 20px;
  height: 20px;
  fill: white;
}

.navbar-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.navbar-logo-name {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-text);
  letter-spacing: var(--tracking-tight);
}

.navbar-logo-tag {
  font-size: 9px;
  font-weight: var(--font-semibold);
  color: var(--color-text-subtle);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
}

/* ── Navigation Links ────────────────────────────────────── */
.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.navbar-link {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.navbar-link:hover {
  color: var(--color-text);
  background-color: var(--color-bg-secondary);
}

.navbar-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* ── Navbar Actions ──────────────────────────────────────── */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.navbar-login {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  text-decoration: none;
}

.navbar-login:hover {
  color: var(--color-text);
  background-color: var(--color-bg-secondary);
}

/* ── Mobile Menu Toggle ──────────────────────────────────── */
.navbar-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  background: none;
  border: none;
  padding: var(--space-2);
}

.navbar-toggle:hover {
  background: var(--color-bg-secondary);
}

.navbar-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.navbar-toggle[aria-expanded="true"] .navbar-toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggle[aria-expanded="true"] .navbar-toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.navbar-toggle[aria-expanded="true"] .navbar-toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Mobile Menu ─────────────────────────────────────────── */
.navbar-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6) var(--space-6);
  z-index: 999;
  box-shadow: var(--shadow-xl);
  max-height: calc(100vh - var(--nav-height));
  overflow-y: auto;
}

.navbar-mobile.open {
  display: block;
  animation: fadeDown 0.25s ease forwards;
}

.navbar-mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-5);
}

.navbar-mobile-link {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.navbar-mobile-link:hover {
  color: var(--color-text);
  background: var(--color-bg-secondary);
}

.navbar-mobile-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.navbar-mobile-actions .btn {
  width: 100%;
  justify-content: center;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .navbar-nav {
    display: none;
  }

  .navbar-toggle {
    display: flex;
  }

  .navbar-login {
    display: none;
  }
}

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