/* ==========================================================================
   Header Component Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   Header Base
   -------------------------------------------------------------------------- */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background: transparent;
  transition: background var(--transition-base), backdrop-filter var(--transition-base);
}

.header.scrolled {
  background: rgba(0, 7, 25, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Light header variant for pages with white backgrounds */
.header-light .logo,
.header-light .logo-text {
  color: var(--color-dark) !important;
}

.header-light .logo:hover,
.header-light .logo-text:hover {
  color: var(--color-dark) !important;
}

.header-light .nav-links a:not(.btn) {
  color: var(--color-dark) !important;
}

.header-light .nav-links a:not(.btn):hover {
  color: var(--color-dark) !important;
}

.header-light .mobile-menu-toggle span {
  background-color: var(--color-dark);
}

/* When scrolled, revert to white text on dark background */
.header-light.scrolled .logo,
.header-light.scrolled .logo-text {
  color: var(--color-white) !important;
}

.header-light.scrolled .logo:hover,
.header-light.scrolled .logo-text:hover {
  color: var(--color-white) !important;
}

.header-light.scrolled .nav-links a:not(.btn) {
  color: var(--color-white) !important;
}

.header-light.scrolled .nav-links a:not(.btn):hover {
  color: var(--color-white) !important;
}

.header-light.scrolled .mobile-menu-toggle span {
  background-color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Header Container Layout
   -------------------------------------------------------------------------- */

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

/* --------------------------------------------------------------------------
   Logo
   -------------------------------------------------------------------------- */

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-white);
  font-weight: var(--font-semibold);
  font-size: var(--text-lg);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.logo:hover {
  color: var(--color-white);
  opacity: 0.9;
}

.logo img {
  height: 32px;
  width: auto;
}

.logo-text {
  font-family: var(--font-display);
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text span {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  letter-spacing: 0.05em;
}

.logo-text span:first-child {
  font-size: var(--text-sm);
}

/* --------------------------------------------------------------------------
   Navigation Links (Desktop)
   -------------------------------------------------------------------------- */

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  opacity: 0.85;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-white);
  opacity: 1;
}

.nav-links a.active {
  opacity: 1;
}

/* CTA button in nav */
.nav-links .btn {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Mobile Menu Toggle (Hamburger)
   -------------------------------------------------------------------------- */

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: var(--space-2);
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 110;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.mobile-menu-toggle span:nth-child(1) {
  transform: translateY(-6px);
}

.mobile-menu-toggle span:nth-child(2) {
  transform: translateY(0);
}

.mobile-menu-toggle span:nth-child(3) {
  transform: translateY(6px);
}

/* Hamburger to X animation when active */
.mobile-menu-toggle.is-active span:nth-child(1) {
  transform: translateY(0) rotate(45deg);
}

.mobile-menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.is-active span:nth-child(3) {
  transform: translateY(-2px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Mobile Menu
   -------------------------------------------------------------------------- */

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 7, 25, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 105;
  padding: var(--space-24) var(--space-6) var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  /* Flexbox centering for menu items */
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  display: block;
  color: var(--color-white);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  padding: var(--space-3) var(--space-8);
  text-decoration: none;
  opacity: 0.85;
  transition: opacity var(--transition-fast);
  text-align: center;
}

.mobile-menu a:hover {
  color: var(--color-white);
  opacity: 1;
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.mobile-menu .btn {
  margin-top: var(--space-8);
  width: auto;
  min-width: 200px;
  justify-content: center;
  opacity: 1;
}

/* Body scroll lock when menu is open */
body.menu-open {
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   Responsive - Mobile Breakpoint (768px)
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .header {
    padding: var(--space-3) 0;
  }

  .nav-links {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-menu {
    display: flex;
  }
}

/* --------------------------------------------------------------------------
   Responsive - Small Mobile (480px)
   -------------------------------------------------------------------------- */

@media (max-width: 480px) {
  .logo {
    font-size: var(--text-base);
  }

  .logo img {
    height: 28px;
  }

  .logo-text {
    max-width: 180px;
    line-height: var(--leading-tight);
  }
}