/* ============================================
   HEADER STYLES - Petoveentra
   ============================================ */

/* Header Layout */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-neutral-100);
  border-bottom: 1px solid var(--color-neutral-200);
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
  padding-left: var(--space-5);
  padding-right: var(--space-5);
}

/* Brand */
.site-brand {
  display: flex;
  align-items: center;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

.site-brand:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
  z-index: 1;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  display: block;
  padding: var(--space-2) 0;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-list a:hover,
.nav-list a:focus {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  text-decoration: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  font-size: 1.25rem;
  color: var(--color-text-primary);
  background-color: transparent;
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-neutral-400);
}

.mobile-menu-toggle[aria-expanded="true"] {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

/* Mobile Responsive */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-list {
    position: fixed;
    top: 4.5rem;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-6);
    background-color: var(--color-neutral-100);
    border-top: 1px solid var(--color-neutral-200);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
  }
  
  .nav-list.is-open {
    transform: translateX(0);
  }
  
  .nav-list li {
    width: 100%;
    border-bottom: 1px solid var(--color-neutral-200);
  }
  
  .nav-list a {
    padding: var(--space-4) 0;
    font-size: var(--text-lg);
    border-bottom: none;
  }
  
  .nav-list a:hover,
  .nav-list a:focus {
    color: var(--color-primary);
    padding-left: var(--space-2);
  }
  
  /* Overlay */
  .site-header::after {
    content: '';
    position: fixed;
    inset: 4.5rem 0 0 0;
    background-color: rgba(61, 52, 43, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    pointer-events: none;
  }
  
  .site-header:has(.nav-list.is-open)::after {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .nav-list {
    transition: none;
  }
}