.site-header {
  height: var(--header-height);
  background-color: var(--color-bg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
}

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

/* === Logo === */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background-color: var(--color-primary);
  color: var(--color-text-white);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(79, 57, 248, 0.2);
}

.logo-icon svg {
  width: 24px;
  height: 24px;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-top {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--color-text-muted);
  line-height: 1;
}

.logo-bottom {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-text-heading);
  line-height: 1.1;
  letter-spacing: -0.5px;
}

/* === Navigation === */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text-heading);
  padding: 10px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

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

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

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

.nav-cta-mobile {
  display: none;
}

.nav-cta-desktop .btn {
  padding: 10px 20px;
  font-size: 0.9rem;
}

/* === Mobile Hamburger === */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-heading);
  transition: all var(--transition-base);
}

/* === Responsive === */
@media (max-width: 992px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg);
    flex-direction: column;
    padding: 40px 20px;
    gap: 30px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    align-items: center;
    gap: 20px;
  }

  .nav-link {
    font-size: 1.2rem;
  }

  .nav-cta-mobile {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: 20px;
  }

  .nav-cta-desktop {
    display: none;
  }
  
  /* hamburger transitions */
  .mobile-menu-toggle.open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .mobile-menu-toggle.open span:nth-child(2) {
    opacity: 0;
  }
  .mobile-menu-toggle.open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* === Dropdown Navigation === */
.nav-item {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 15px 20px;
  list-style: none;
  min-width: 260px;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.dropdown-menu a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: block;
  padding: 5px 0;
  text-align: left;
}

.dropdown-menu a:hover {
  color: var(--color-primary);
}

/* === Nested Submenu styles === */
.submenu-item {
  position: relative;
}

.submenu-title {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text);
  padding: 5px 0;
  cursor: default;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.submenu-title::after {
  content: '▸';
  margin-left: 8px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.sub-dropdown-menu {
  position: absolute;
  top: 0;
  left: 100%;
  transform: translateX(10px);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 15px 20px;
  list-style: none;
  min-width: 220px;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.submenu-item:hover .sub-dropdown-menu {
  opacity: 1;
  pointer-events: all;
  visibility: visible;
  transform: translateX(0);
}

/* Mobile dropdown styles */
@media (max-width: 992px) {
  .dropdown-menu {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 10px 0 10px 20px;
    min-width: unset;
    opacity: 1;
    pointer-events: all;
    visibility: visible;
    display: none;
  }
  
  .nav-item:hover .dropdown-menu {
    display: flex;
  }
  
  .dropdown-menu a {
    font-size: 1rem;
    text-align: center;
  }

  .submenu-title {
    justify-content: center;
    font-size: 1rem;
  }

  .submenu-title::after {
    content: ' ▾';
  }

  .sub-dropdown-menu {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 5px 0 5px 20px;
    min-width: unset;
    opacity: 1;
    pointer-events: all;
    visibility: visible;
    display: none;
    flex-direction: column;
    gap: 10px;
  }

  .submenu-item:hover .sub-dropdown-menu {
    display: flex;
  }
}