/* ============================================
   Aurexa Academy — Premium Navbar v2.0
   Glassmorphism + Micro-animations
   ============================================ */

.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-navbar);
  height: var(--navbar-height);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.transparent {
  background: transparent;
}

.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  max-width: var(--container-max);
  margin: 0 auto; padding: 0 var(--space-xl);
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}

/* Logo */
.navbar-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-heading); font-weight: var(--fw-bold);
  font-size: var(--fs-xl); color: var(--text-primary); z-index: 10;
  transition: all var(--transition-base);
}
.navbar.transparent .navbar-logo { color: var(--text-light); }

.logo-icon {
  width: 40px; height: 40px; border-radius: var(--radius-md);
  background: var(--gradient-accent);
  display: flex; align-items: center; justify-content: center;
  font-weight: var(--fw-extrabold); font-size: var(--fs-md);
  color: var(--primary-dark);
  box-shadow: var(--shadow-accent);
  transition: all var(--transition-spring);
}
.navbar-logo:hover .logo-icon { transform: rotate(-5deg) scale(1.1); }
.logo-dot { color: var(--accent); }

/* Links */
.navbar-links {
  display: flex; align-items: center; gap: var(--space-xs);
}

.navbar-links > a {
  padding: 8px 16px; font-weight: var(--fw-medium); font-size: var(--fs-sm);
  color: var(--text-secondary); border-radius: var(--radius-md);
  transition: all var(--transition-base); position: relative;
  letter-spacing: var(--ls-wide);
}
.navbar.transparent .navbar-links > a { color: rgba(255,255,255,0.75); }
.navbar.transparent .navbar-links > a:hover { color: rgba(255,255,255,1); }
.navbar.transparent .navbar-links > a.active { color: var(--text-light); }

.navbar-links > a::after {
  content: ''; position: absolute; bottom: 2px; left: 50%; width: 0; height: 2px;
  background: var(--brand); border-radius: var(--radius-full);
  transition: all var(--transition-base); transform: translateX(-50%);
}
.navbar-links > a.active::after, .navbar-links > a:hover::after { width: 60%; }
.navbar-links > a:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.navbar-links > a.active { color: var(--brand); font-weight: var(--fw-semibold); }

/* Login Dropdown */
.login-dropdown { position: relative; }

.login-dropdown-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: var(--radius-full);
  background: var(--gradient-brand); color: white;
  font-weight: var(--fw-semibold); font-size: var(--fs-sm);
  cursor: pointer; border: none; transition: all var(--transition-base);
  box-shadow: var(--shadow-brand);
}
.login-dropdown-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(var(--brand-rgb),0.35); }
.login-dropdown-btn svg { width: 14px; height: 14px; transition: transform var(--transition-base); }
.login-dropdown.open .login-dropdown-btn svg { transform: rotate(180deg); }

.login-dropdown-menu {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--bg-elevated); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl); border: 1px solid var(--border-light);
  min-width: 200px; padding: 6px;
  opacity: 0; visibility: hidden; transform: translateY(-8px) scale(0.95);
  transition: all var(--transition-base);
}
.login-dropdown.open .login-dropdown-menu {
  opacity: 1; visibility: visible; transform: translateY(0) scale(1);
}
.login-dropdown-menu a {
  display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  font-size: var(--fs-sm); color: var(--text-secondary); border-radius: var(--radius-md);
  transition: all var(--transition-fast); font-weight: var(--fw-medium);
}
.login-dropdown-menu a:hover { background: var(--bg-secondary); color: var(--text-primary); transform: translateX(2px); }
.login-dropdown-menu a svg { width: 18px; height: 18px; flex-shrink: 0; }

/* Hamburger */
.navbar-hamburger {
  display: none; flex-direction: column; gap: 5px; padding: 8px;
  z-index: 10; cursor: pointer;
}
.navbar-hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: all var(--transition-base);
}
.navbar.transparent .navbar-hamburger span { background: white; }
.navbar-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.navbar-hamburger.open span:nth-child(2) { opacity: 0; }
.navbar-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Overlay */
.mobile-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px); z-index: calc(var(--z-navbar) - 2);
  opacity: 0; visibility: hidden; transition: all var(--transition-base);
}
.mobile-overlay.show { opacity: 1; visibility: visible; }

/* Mobile */
@media (max-width: 900px) {
  .navbar-links {
    position: fixed; top: 0; right: -100%; width: 300px; height: 100vh;
    background: var(--bg-elevated); flex-direction: column; justify-content: center;
    gap: var(--space-sm); padding: var(--space-2xl);
    z-index: calc(var(--z-navbar) - 1); transition: right var(--transition-slow);
    box-shadow: var(--shadow-2xl);
  }
  .navbar-links.open { right: 0; }
  .navbar-links > a { font-size: var(--fs-md); padding: 14px 20px; width: 100%; border-radius: var(--radius-md); }
  .navbar-links > a, .navbar.transparent .navbar-links > a { color: var(--text-primary); }
  .navbar-links > a:hover, .navbar.transparent .navbar-links > a:hover { background: var(--bg-secondary); }
  .navbar-hamburger { display: flex; }
  .login-dropdown { width: 100%; }
  .login-dropdown-btn { width: 100%; justify-content: center; }
  .login-dropdown-menu { position: static; box-shadow: none; border: 1px solid var(--border-light); transform: none; }
  .login-dropdown.open .login-dropdown-menu { opacity: 1; visibility: visible; }
}