.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-navbar);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

/* LOGO */
.nav-logo a {
  font-family: var(--font-secondary);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: transform var(--transition-fast);
}

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

.nav-logo i {
  font-size: var(--font-size-3xl);
}

/* NAVIGATION MENU */
.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  align-items: center;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-tertiary);
  font-weight: 500;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--primary-color, var(--secondary-color))
  );
  transition: width var(--transition-normal);
}

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

.nav-link:hover::after,
.nav-link:active::after {
  width: 100%;
}

/* DROPDOWN MENU */
.dropdown {
  position: relative;
}

.dropdown-toggle::after {
  content: "";
  border: none;
  font-size: var(--font-size-sm);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  list-style: none;
  min-width: 200px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
  z-index: var(--z-dropdown);
  overflow: hidden;
  margin-top: var(--spacing-sm);
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li {
  margin: 0;
}

.dropdown-menu a {
  display: block;
  padding: var(--spacing-md);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
  background-color: var(--bg-secondary);
  color: var(--primary-color);
  padding-left: var(--spacing-lg);
}

/* THEME TOGGLE */
.theme-toggle {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  cursor: pointer;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: color var(--transition-fast);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
}

.theme-toggle:hover {
  color: var(--primary-color);
}

.theme-toggle i:last-child {
  display: none;
}

body.dark-theme .theme-toggle i:first-child {
  display: none;
}

body.dark-theme .theme-toggle i:last-child {
  display: inline;
}

/* AUTH BUTTONS */
.auth-buttons {
  display: flex;
  gap: var(--spacing-md);
}

/* HAMBURGER MENU */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: var(--spacing-sm);
}

.ham-line {
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

.hamburger.active .ham-line:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}
.hamburger.active .ham-line:nth-child(2) {
  opacity: 0;
}
.hamburger.active .ham-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* MOBILE MENU */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
  }

  .nav-menu.active {
    max-height: 500px;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: var(--spacing-md);
  }

  .dropdown-menu {
    position: static;
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    overflow: hidden;
    box-shadow: none;
    border: none;
    transform: none;
    margin-top: 0;
    background-color: var(--bg-secondary);
    transition:
      max-height var(--transition-normal),
      opacity var(--transition-normal),
      visibility var(--transition-normal);
  }

  .dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    max-height: 300px;
  }

  .dropdown-menu a {
    padding-left: var(--spacing-xl);
  }

  .auth-buttons {
    width: 100%;
    gap: var(--spacing-sm);
    flex-direction: column;
  }

  .auth-buttons .btn {
    width: 100%;
  }

  .theme-toggle-wrapper {
    width: 100%;
  }
}