/* ============================================================
   CampusCoders — Navbar
   ============================================================ */

.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 72px;
  display: flex;
  align-items: center;
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--t-base);
}

.navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
  height: 64px;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}

/* ─── Logo ────────────────────────────────────────────────────── */
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  width: 40px;
  height: 40px;
  background: var(--grad-blue);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  font-family: var(--font-head);
  box-shadow: 0 4px 12px rgba(37,99,235,0.4);
}

.logo-text {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-primary);
  line-height: 1.2;
}

.logo-text span { color: var(--c-primary-light); }
.logo-sub {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.5px;
}

/* ─── Nav Menu ────────────────────────────────────────────────── */
.navbar-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--r-sm);
  transition: all var(--t-fast);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.nav-link .nav-arrow {
  font-size: 0.65rem;
  transition: transform var(--t-fast);
}

.nav-item:hover .nav-arrow { transform: rotate(180deg); }

/* ─── Mega Dropdown ───────────────────────────────────────────── */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 12px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  min-width: 200px;
  z-index: 1050;
}

/* Invisible hover bridge to prevent cursor drop */
.nav-dropdown::before {
  content: '';
  position: absolute;
  top: -16px;
  left: 0;
  right: 0;
  height: 18px;
  background: transparent;
}

.nav-item:hover .nav-dropdown,
.nav-dropdown:hover {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-wide {
  min-width: 600px;
  padding: 24px;
}

.nav-dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-radius: var(--r-sm);
  transition: all var(--t-fast);
}

.nav-dropdown a:hover {
  background: rgba(37,99,235,0.08);
  color: var(--text-primary);
}

.nav-dropdown a .dd-icon {
  width: 32px;
  height: 32px;
  background: rgba(37,99,235,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.dd-content { flex: 1; }
.dd-title { font-weight: 600; color: var(--text-primary); font-size: 0.85rem; display: block; }
.dd-desc  { font-size: 0.75rem; color: var(--text-muted); display: block; margin-top: 2px; }

.mega-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }

/* ─── Navbar CTA ──────────────────────────────────────────────── */
.navbar-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* ─── Mobile Hamburger ────────────────────────────────────────── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--r-sm);
  background: none;
  border: none;
  color: var(--text-primary);
}

.ham-line {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--t-base);
  display: block;
}

.nav-hamburger.open .ham-line:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-hamburger.open .ham-line:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open .ham-line:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ─── Mobile Menu ─────────────────────────────────────────────── */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0; right: 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 16px;
  max-height: calc(100vh - 72px);
  overflow-y: auto;
  transform: translateY(-10px);
  opacity: 0;
  transition: all var(--t-base);
  z-index: 999;
}

.mobile-menu.open {
  display: block;
  transform: translateY(0);
  opacity: 1;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  color: var(--text-primary);
  font-weight: 500;
  border-radius: var(--r-md);
  transition: background var(--t-fast);
  font-size: 0.95rem;
}

.mobile-nav-link:hover { background: rgba(255,255,255,0.05); color: var(--text-primary); }

.mobile-submenu {
  padding-left: 16px;
  border-left: 2px solid var(--border);
  margin: 4px 16px 4px;
  display: none;
}

.mobile-submenu.open { display: block; }

.mobile-submenu a {
  display: block;
  padding: 8px 12px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  border-radius: var(--r-sm);
  transition: all var(--t-fast);
}

.mobile-submenu a:hover { color: var(--text-primary); background: rgba(37,99,235,0.08); }

.mobile-cta { padding: 16px 0 8px; border-top: 1px solid var(--border); margin-top: 8px; }

@media (max-width: 1024px) {
  .navbar-menu, .navbar-cta .btn-outline { display: none; }
  .nav-hamburger { display: flex; }
  .navbar-cta { gap: 6px; }
}