/* ==========================================================================
   06-header.css — Header matching website.pen
   .pen: height 72, padding 0 80, bg $card-bg, shadow 0 4px blur 40 #00000008
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-card-bg);
  box-shadow: var(--shadow-nav);
}

.site-header__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo — .pen: Fraunces 22px bold, "OFI" in $text, "HQ" in $primary */
.site-header__logo {
  text-decoration: none;
  flex-shrink: 0;
}

.site-header__logo-text {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

.site-header__logo-accent {
  color: var(--color-primary);
}

/* Language switcher */
.site-header__langs {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__lang {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-header__lang:hover {
  color: var(--color-text);
}

.site-header__lang--current {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

/* Desktop menu */
.site-header__menu {
  display: flex;
  align-items: center;
  gap: var(--space-9);
}

/* Nav links — .pen: Plus Jakarta Sans 14px, weight 500, $text-secondary, gap 32 */
.site-header__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.site-header__link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.site-header__link:hover {
  color: var(--color-text);
}

/* Hamburger toggle */
.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
}

.site-header__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

/* Mobile */
@media (max-width: 767px) {
  .site-header__toggle {
    display: flex;
  }

  .site-header__menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-5);
    padding: var(--space-7);
    background-color: var(--color-card-bg);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.04);
  }

  .site-header__menu.is-open {
    display: flex;
  }

  .site-header__links {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-header__link {
    display: block;
    padding: var(--space-4) 0;
    font-size: var(--font-size-base);
    border-bottom: 1px solid var(--color-border-light);
  }

  .site-header__actions {
    padding-top: var(--space-4);
  }

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