/* ═══════════════════════════════════════════════════════════════════════
   FastFixCell.com — Navigation v3.0
   Glass-Morph Sticky Nav + Neon Active States
   ═══════════════════════════════════════════════════════════════════════ */

.ff-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur-heavy);
  -webkit-backdrop-filter: var(--glass-blur-heavy);
  border-bottom: var(--border-subtle);
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: all var(--transition-base);
}
.ff-header.scrolled {
  box-shadow: var(--shadow-lg);
  border-bottom: var(--border-glow);
}

.ff-container {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  min-height: 48px;
}

/* ── Logo ───────────────────────────────────────────────────── */
.ff-logo {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}
.ff-logo img { height: 42px; width: auto; display: block; }
.ff-logo-text {
  font-size: var(--text-xl);
  font-weight: var(--font-black);
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}
.ff-logo-text span { color: var(--primary-400); }

/* ── Nav Links ──────────────────────────────────────────────── */
.ff-nav-links {
  display: flex;
  gap: var(--space-1);
  list-style: none;
  align-items: center;
}
.ff-nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wide);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: all var(--transition-fast);
  position: relative;
}
.ff-nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}
.ff-nav-links a.active {
  color: var(--primary-300);
  background: rgba(37, 99, 235, 0.1);
}

/* ── Glow underline on hover ────────────────────────────────── */
.ff-nav-links a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 0; height: 2px;
  background: var(--primary-400);
  border-radius: var(--radius-full);
  box-shadow: var(--primary-glow);
  transition: width var(--transition-base);
}
.ff-nav-links a:not(.nav-cta):hover::after { width: 60%; }

/* ── Dropdown ───────────────────────────────────────────────── */
.nav-dropdown { position: relative; }
.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 200px;
  padding: var(--space-2);
  border-radius: var(--radius-xl);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur-heavy);
  -webkit-backdrop-filter: var(--glass-blur-heavy);
  border: var(--border-default);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown-menu a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-md);
}

/* ── CTA Button ─────────────────────────────────────────────── */
.nav-cta {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600)) !important;
  color: white !important;
  padding: var(--space-3) var(--space-5) !important;
  border-radius: var(--radius-lg) !important;
  font-weight: var(--font-bold) !important;
  box-shadow: var(--primary-glow);
  transition: all var(--transition-base) !important;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(37, 99, 235, 0.5), 0 0 80px rgba(37, 99, 235, 0.2) !important;
  background: linear-gradient(135deg, var(--primary-400), var(--primary-500)) !important;
  color: white !important;
}

/* ── Cart Icon ──────────────────────────────────────────────── */
.nav-cart-link {
  position: relative;
  padding: var(--space-1) !important;
  display: inline-flex;
  align-items: center;
}
.nav-cart-icon { width: 44px; height: 44px; display: block; }
.cart-badge {
  position: absolute;
  top: 0; right: 0;
  background: var(--accent-500);
  color: var(--text-inverse);
  font-size: 10px;
  font-weight: var(--font-black);
  min-width: 18px; height: 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--accent-glow);
}

/* ── Mobile Toggle ──────────────────────────────────────────── */
.mobile-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  padding: var(--space-2);
  z-index: calc(var(--z-nav) + 1);
}
.mobile-toggle span {
  width: 26px; height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}
.mobile-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-toggle.open span:nth-child(2) { opacity: 0; }
.mobile-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── Dark Mode Toggle ───────────────────────────────────────── */
.theme-toggle {
  background: none;
  border: var(--border-default);
  color: var(--text-secondary);
  width: 38px; height: 38px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}
.theme-toggle:hover {
  background: var(--surface-3);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

/* ── Mobile Sidebar ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .ff-nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: 300px; height: 100vh;
    flex-direction: column;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur-heavy);
    -webkit-backdrop-filter: var(--glass-blur-heavy);
    border-left: var(--border-default);
    padding: calc(var(--nav-height) + var(--space-6)) var(--space-6) var(--space-6);
    gap: var(--space-1);
    transition: right var(--transition-base);
    z-index: var(--z-nav);
    overflow-y: auto;
  }
  .ff-nav-links.open { right: 0; }
  .ff-nav-links a { width: 100%; padding: var(--space-3) var(--space-4); font-size: var(--text-base); }
  .mobile-toggle { display: flex; }
  .nav-dropdown-menu {
    position: static;
    opacity: 1; visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
    padding-left: var(--space-6);
  }
  .nav-cta { text-align: center; justify-content: center; }
}