/* Header-specific styles building on base.css */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background-color: rgba(247, 247, 249, 0.95);
}

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

.site-header__brand {
  display: flex;
  align-items: center;
}

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.site-header__logo-mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.9rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: var(--shadow-sm);
}

.site-header__text {
  display: flex;
  flex-direction: column;
}

.site-header__name {
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gray-900);
}

.site-header__tagline {
  font-size: 0.75rem;
  color: var(--gray-500);
}

/* Navigation */

.site-nav-wrapper {
  display: flex;
  align-items: center;
}

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

.site-nav__item {
  list-style: none;
}

.site-nav__link {
  font-size: var(--font-size-sm);
  color: var(--gray-700);
  text-decoration: none;
  padding: 0.25rem 0;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-primary-strong);
}

.site-nav__item--cta {
  margin-left: var(--space-2);
}

.site-nav__cta {
  font-size: var(--font-size-sm);
  color: white !important;
}

/* Mobile toggle */

.site-header__toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  cursor: pointer;
  background-color: #ffffff;
}

.site-header__toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-800);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* Toggle animation when open */

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Responsive behaviour */

@media (max-width: 768px) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-nav-wrapper {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    background-color: #ffffff;
    border-bottom: 1px solid var(--color-border-subtle);
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-normal);
  }

  .site-nav-wrapper.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: scaleY(1);
  }

  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    gap: var(--space-2);
  }

  .site-nav__item--cta {
    width: 100%;
    margin-left: 0;
    margin-top: var(--space-2);
  }

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

@media (max-width: 480px) {
  .site-header__name {
    font-size: 0.85rem;
  }

  .site-header__tagline {
    display: none;
  }
}