/* Header component styles */
.site-header {
  --header-bg: var(--color-surface);
  --header-border: var(--border-color);
  --header-text: var(--color-text);
  --header-link: var(--color-text);
  --header-link-hover: var(--color-primary);
  --header-toggle-color: var(--color-text);
  --header-toggle-bg: transparent;
  --header-toggle-hover-bg: var(--color-tertiary);
  --header-toggle-active-bg: var(--color-tertiary);
  --header-nav-bg: var(--color-surface);
  --header-nav-shadow: var(--shadow-card);
  --header-nav-z: 1000;
  --header-utility-bg: var(--color-background);
  --header-utility-text: var(--color-secondary);
  --header-utility-link: var(--color-secondary);
  --header-utility-link-hover: var(--color-primary);
  --header-logo-size: 40px;
  --header-brand-font-size: 1.5rem;
  --header-brand-font-weight: 700;
  --header-nav-gap: var(--space-4);
  --header-nav-item-padding: var(--space-2) 0;
  --header-nav-link-font-size: 0.9375rem;
  --header-nav-link-font-weight: 600;
  --header-nav-link-letter-spacing: 0.02em;
  --header-nav-link-text-transform: none;
  --header-nav-link-padding: var(--space-2) var(--space-3);
  --header-nav-link-border-radius: var(--radius-small);
  --header-nav-link-transition: color var(--transition-fast), background-color var(--transition-fast);
  --header-toggle-size: 2.75rem;
  --header-toggle-line-width: 1.25rem;
  --header-toggle-line-height: 2px;
  --header-toggle-line-gap: 5px;
  --header-toggle-line-color: var(--header-toggle-color);
  --header-toggle-line-radius: 1px;
  --header-toggle-transition: transform var(--transition-fast), background-color var(--transition-fast);
  --header-mobile-nav-max-width: 24rem;
  --header-mobile-nav-padding: var(--space-4);
  --header-mobile-nav-item-padding: var(--space-2) 0;
  --header-mobile-nav-link-font-size: 1.125rem;
  --header-mobile-nav-link-font-weight: 600;
  --header-mobile-nav-link-padding: var(--space-2) var(--space-3);
  --header-mobile-nav-link-border-radius: var(--radius-small);
  --header-mobile-nav-link-transition: color var(--transition-fast), background-color var(--transition-fast);
  --header-mobile-nav-link-hover-bg: var(--color-tertiary);
  --header-mobile-nav-link-hover-color: var(--color-text);
  --header-mobile-nav-z: 1000;
  --header-breakpoint: 64rem;
}

.site-header {
  position: relative;
  z-index: var(--header-nav-z);
  background-color: var(--header-bg);
  border-bottom: var(--border-width) solid var(--header-border);
}

.site-header__utility {
  background-color: var(--header-utility-bg);
  border-bottom: var(--border-width) solid var(--header-border);
  font-size: var(--text-small-size);
  line-height: 1.4;
}

.site-header__utility-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-2);
}

.site-header__utility-text {
  color: var(--header-utility-text);
  margin: 0;
}

.site-header__utility-link {
  color: var(--header-utility-link);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-weight: 600;
}

.site-header__utility-link:hover {
  color: var(--header-utility-link-hover);
}

.site-header__main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
  position: relative;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--header-text);
  flex-shrink: 0;
  min-width: 0;
}

.site-header__logo {
  width: var(--header-logo-size);
  height: var(--header-logo-size);
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: var(--header-brand-font-size);
  font-weight: var(--header-brand-font-weight);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: var(--header-toggle-size);
  height: var(--header-toggle-size);
  background-color: var(--header-toggle-bg);
  border: none;
  border-radius: var(--radius-small);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  flex-shrink: 0;
  position: relative;
  z-index: calc(var(--header-mobile-nav-z) + 1);
}

.site-header__toggle:hover {
  background-color: var(--header-toggle-hover-bg);
}

.site-header__toggle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.site-header__toggle-line {
  display: block;
  width: var(--header-toggle-line-width);
  height: var(--header-toggle-line-height);
  background-color: var(--header-toggle-line-color);
  border-radius: var(--header-toggle-line-radius);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.site-header__toggle-line:nth-child(1) {
  top: calc(50% - var(--header-toggle-line-gap) - var(--header-toggle-line-height));
}

.site-header__toggle-line:nth-child(2) {
  top: 50%;
  transform: translate(-50%, -50%);
}

.site-header__toggle-line:nth-child(3) {
  top: calc(50% + var(--header-toggle-line-gap));
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  top: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
}

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

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) {
  top: 50%;
  transform: translate(-50%, -50%) rotate(-45deg);
}

.site-header__nav {
  display: flex;
  align-items: center;
  flex-shrink: 1;
  min-width: 0;
}

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

.site-header__nav-item {
  margin: 0;
  padding: 0;
  flex-shrink: 0;
}

.site-header__nav-link {
  display: inline-block;
  padding: var(--header-nav-link-padding);
  font-size: var(--header-nav-link-font-size);
  font-weight: var(--header-nav-link-font-weight);
  letter-spacing: var(--header-nav-link-letter-spacing);
  text-transform: var(--header-nav-link-text-transform);
  color: var(--header-link);
  text-decoration: none;
  border-radius: var(--header-nav-link-border-radius);
  transition: var(--header-nav-link-transition);
  white-space: nowrap;
}

.site-header__nav-link:hover {
  color: var(--header-link-hover);
  background-color: var(--header-toggle-hover-bg);
}

.site-header__nav-link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.site-header__nav-item--contact .site-header__nav-link {
  color: var(--color-accent);
  font-weight: 700;
}

.site-header__nav-item--contact .site-header__nav-link:hover {
  color: var(--color-secondary);
}

@media (max-width: 63.9375rem) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(100%, var(--header-mobile-nav-max-width));
    max-width: var(--header-mobile-nav-max-width);
    background-color: var(--header-nav-bg);
    box-shadow: var(--header-nav-shadow);
    z-index: var(--header-mobile-nav-z);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: var(--header-mobile-nav-padding);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .site-header__nav.is-open {
    transform: translateX(0);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .site-header__nav-item {
    width: 100%;
    flex-shrink: 1;
  }

  .site-header__nav-link {
    display: block;
    width: 100%;
    padding: var(--header-mobile-nav-link-padding);
    font-size: var(--header-mobile-nav-link-font-size);
    font-weight: var(--header-mobile-nav-link-font-weight);
    border-radius: var(--header-mobile-nav-link-border-radius);
    transition: var(--header-mobile-nav-link-transition);
    white-space: normal;
  }

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

  .site-header__nav-item--contact .site-header__nav-link {
    color: var(--color-accent);
  }

  .site-header__nav-item--contact .site-header__nav-link:hover {
    color: var(--color-secondary);
  }
}

@media (min-width: 64rem) {
  .site-header__nav {
    position: static;
    transform: none;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    padding: 0;
    overflow: visible;
    background-color: transparent;
    box-shadow: none;
    width: auto;
    max-width: none;
  }

  .site-header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--header-nav-gap);
  }

  .site-header__nav-item {
    width: auto;
    flex-shrink: 0;
  }

  .site-header__nav-link {
    display: inline-block;
    width: auto;
    padding: var(--header-nav-link-padding);
    font-size: var(--header-nav-link-font-size);
    font-weight: var(--header-nav-link-font-weight);
    white-space: nowrap;
  }
}

@media (max-width: 30rem) {
  .site-header__brand-text {
    font-size: 1.25rem;
  }

  .site-header__logo {
    width: 32px;
    height: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav,
  .site-header__toggle-line,
  .site-header__toggle,
  .site-header__nav-link {
    transition: none;
  }
}