/* ============================================================
   WORDPRESS ADMIN BAR COMPATIBILITY
   ============================================================ */
body.admin-bar .site-header,
body.admin-bar header {
  top: 32px;
}

@media screen and (max-width: 782px) {
  body.admin-bar .site-header,
  body.admin-bar header {
    top: 46px;
  }
}

/* ============================================================
   SITE HEADER
   ============================================================ */
.site-header,
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  height: 84px;
  display: flex;
  align-items: center;
  overflow: visible;
  transition:
    background-color var(--duration-slow) var(--ease-out),
    border-color var(--duration-slow) var(--ease-out),
    height var(--duration-slow) var(--ease-out),
    backdrop-filter var(--duration-slow) var(--ease-out),
    box-shadow var(--duration-slow) var(--ease-out);

  /* Initially transparent */
  background-color: transparent;
  border-bottom: 1px solid transparent;
}

/* Scrolled state — added via JS */
.site-header.is-scrolled {
  height: 72px;
  background-color: rgba(5, 12, 26, 0.92);
  border-bottom-color: var(--color-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}


/* ============================================================
   HEADER INNER LAYOUT
   ============================================================ */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: var(--space-8);
}


/* ============================================================
   LOGO
   ============================================================ */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

.site-logo:hover {
  opacity: 0.85;
}

.logo-mark {
  flex-shrink: 0;
  line-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-mark svg {
  width: 32px;
  height: 32px;
}

.logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: var(--radius-md);
  display: block;
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.logo-name {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: var(--weight-extrabold);
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  line-height: 1.1;
}

.logo-tagline {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  line-height: 1;
}


/* ============================================================
   DESKTOP NAVIGATION
   ============================================================ */
.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: 0.01em;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition:
    color var(--duration-base) var(--ease-out),
    background-color var(--duration-base) var(--ease-out);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  right: 50%;
  height: 1px;
  background: var(--color-primary);
  opacity: 0;
  transition:
    left var(--duration-base) var(--ease-out),
    right var(--duration-base) var(--ease-out),
    opacity var(--duration-base) var(--ease-out);
}

.nav-link:hover {
  color: var(--color-text-primary);
  background-color: rgba(56, 189, 248, 0.06);
}

.nav-link:hover::after {
  left: var(--space-4);
  right: var(--space-4);
  opacity: 0.6;
}

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

.nav-link.is-active::after {
  left: var(--space-4);
  right: var(--space-4);
  opacity: 1;
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}


/* ============================================================
   HEADER CTA BUTTON
   ============================================================ */
.header-cta {
  flex-shrink: 0;
  font-size: var(--text-sm);
  padding: 0.5rem 1.125rem;
  height: 36px;
  border-radius: var(--radius-full);

  /* Custom subtle variant initially */
  background: rgba(56, 189, 248, 0.1);
  color: var(--color-primary);
  border: 1.5px solid rgba(56, 189, 248, 0.3);
  transition:
    background-color var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.header-cta:hover {
  background: var(--color-primary);
  color: var(--color-text-inverted);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow-primary);
  transform: translateY(-1px);
}

/* When scrolled, make CTA more prominent */
.site-header.is-scrolled .header-cta {
  background: var(--color-primary);
  color: var(--color-text-inverted);
  border-color: var(--color-primary);
}

.site-header.is-scrolled .header-cta:hover {
  background: var(--color-primary-bright);
  border-color: var(--color-primary-bright);
  box-shadow: var(--shadow-glow-primary);
}


/* ============================================================
   MOBILE MENU BUTTON
   ============================================================ */
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: var(--transition-base);
  flex-shrink: 0;
}

.mobile-menu-btn:hover {
  background: rgba(56, 189, 248, 0.06);
  border-color: var(--color-border-strong);
}

.mobile-menu-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Hamburger lines */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition:
    transform var(--duration-base) var(--ease-out),
    opacity var(--duration-base) var(--ease-out),
    width var(--duration-base) var(--ease-out);
  transform-origin: center;
}

/* Open state — X animation */
.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}


/* ============================================================
   MOBILE NAVIGATION PANEL
   ============================================================ */
.mobile-nav {
  position: fixed;
  top: 90px;
  left: 0;
  right: 0;
  background: rgba(5, 12, 26, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-6) var(--container-px);
  z-index: calc(var(--z-header) - 1);

  /* Hidden by default */
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition:
    top var(--duration-slow) var(--ease-out),
    opacity var(--duration-base) var(--ease-out),
    visibility var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out);
}

.site-header.is-scrolled + .mobile-nav,
.is-scrolled .mobile-nav {
  top: 72px;
}

body.admin-bar .mobile-nav {
  top: calc(90px + 32px);
}

@media screen and (max-width: 782px) {
  body.admin-bar .mobile-nav {
    top: calc(90px + 46px);
  }
}

.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: var(--transition-base);
  border-left: 2px solid transparent;
}

.mobile-nav-link:hover {
  color: var(--color-primary);
  background: rgba(56, 189, 248, 0.06);
  border-left-color: var(--color-primary);
  padding-left: var(--space-6);
}

.mobile-nav-link.is-active {
  color: var(--color-primary-bright);
  background: rgba(56, 189, 248, 0.1);
  border-left-color: var(--color-primary);
  padding-left: var(--space-6);
  font-weight: var(--weight-bold);
}

.mobile-nav-cta {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* Adjust mobile-nav top if header shrinks */
.site-header.is-scrolled + .mobile-nav,
.is-scrolled .mobile-nav {
  top: var(--header-height-scrolled);
}


/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */
@media (max-width: 1024px) {
  .site-nav {
    display: none;
  }

  .header-cta {
    display: none;
  }

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

@media (max-width: 480px) {
  .logo-tagline {
    display: none;
  }
}