/* Header styles scoped to .site-header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

.site-header__branding {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
}

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.site-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #00386f 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: var(--shadow-md);
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
}

.site-header__brand-name {
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--gray-900);
}

.site-header__brand-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Navigation */

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--gray-700);
  padding: 0.25rem 0;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  width: 100%;
}

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

.site-header__cta-wrap {
  margin-left: var(--space-4);
}

.site-header__cta {
  font-size: var(--font-size-sm);
}

/* Mobile toggle */

.site-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--gray-200);
  background-color: var(--color-surface);
  color: var(--gray-800);
}

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

.site-header__toggle-icon {
  position: relative;
  width: 18px;
  height: 14px;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
}

.site-header__toggle-icon span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 999px;
  background-color: var(--gray-800);
  transition: transform var(--transition-fast), opacity var(--transition-fast), top var(--transition-fast), bottom var(--transition-fast);
}

/* Open state for mobile menu button */

.site-header--menu-open .site-header__toggle-icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header--menu-open .site-header__toggle-icon span:nth-child(2) {
  opacity: 0;
}

.site-header--menu-open .site-header__toggle-icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Responsive behaviour */

@media (max-width: 768px) {
  .site-header__inner {
    gap: var(--space-2);
  }

  .site-header__brand-tagline {
    display: none;
  }

  .site-header__toggle {
    display: inline-flex;
    margin-left: var(--space-2);
  }

  .site-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 56px; /* approx header height */
    background-color: var(--color-surface);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    padding: var(--space-4) var(--space-4) var(--space-6);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  .site-header--menu-open .site-header__nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    width: 100%;
  }

  .site-header__nav-link {
    width: 100%;
  }

  .site-header__cta-wrap {
    width: 100%;
    margin-left: 0;
    margin-top: var(--space-4);
  }

  .site-header__cta {
    width: 100%;
    justify-content: center;
  }
}

@media (min-width: 769px) {
  .site-header__nav {
    margin-left: var(--space-8);
  }
}