/* ==========================================================================
   AuditHub Landing Page - Header Component
   Sticky Navigation with Mobile Menu
   ========================================================================== */

/* --------------------------------------------------------------------------
   Header Base
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background-color: var(--color-bg-white);
  height: var(--header-height);
  transition: box-shadow var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-header);
}

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

/* --------------------------------------------------------------------------
   Logo
   -------------------------------------------------------------------------- */
.header-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

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

.header-logo:hover {
  opacity: 0.9;
}

/* --------------------------------------------------------------------------
   Desktop Navigation
   -------------------------------------------------------------------------- */
.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.nav-link {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background-color: var(--color-bg-light);
}

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

.header-cta {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

/* --------------------------------------------------------------------------
   Mobile Menu Button
   -------------------------------------------------------------------------- */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: background-color var(--transition-fast);
}

.mobile-menu-btn:hover {
  background-color: var(--color-bg-light);
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
}

.menu-icon-close {
  display: none;
}

.mobile-menu-btn.active .menu-icon-open {
  display: none;
}

.mobile-menu-btn.active .menu-icon-close {
  display: block;
}

/* --------------------------------------------------------------------------
   Mobile Navigation
   -------------------------------------------------------------------------- */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-white);
  padding: var(--spacing-6);
  overflow-y: auto;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-6);
}

.mobile-nav-link {
  display: block;
  padding: var(--spacing-4);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.mobile-nav-link:hover {
  background-color: var(--color-bg-light);
}

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

.mobile-nav-cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-border);
}

.mobile-nav-cta .btn {
  width: 100%;
  justify-content: center;
}

/* --------------------------------------------------------------------------
   Body Scroll Lock
   -------------------------------------------------------------------------- */
body.menu-open {
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   Responsive Styles
   -------------------------------------------------------------------------- */
@media (max-width: 1023px) {
  .header-nav {
    display: none;
  }

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

  .mobile-nav {
    display: block;
  }
}

@media (min-width: 1024px) {
  .mobile-nav {
    display: none !important;
  }
}

/* Adjust spacing for smaller screens */
@media (max-width: 767px) {
  .header-logo img {
    height: 28px;
  }

  .mobile-nav {
    padding: var(--spacing-4);
  }

  .mobile-nav-link {
    padding: var(--spacing-3);
    font-size: var(--font-size-base);
  }
}

/* --------------------------------------------------------------------------
   Header Spacer (for fixed header)
   -------------------------------------------------------------------------- */
.header-spacer {
  height: var(--header-height);
}