/* Header component styles */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-primary);
  border-bottom: 2px solid var(--border);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.site-header__inner {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  height: 100%;
}

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

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

.site-header__brand:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
  border-radius: var(--radius-1);
}

.site-header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 20px;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: var(--touch-target-min);
  height: var(--touch-target-min);
  padding: 0;
  background: none;
  border: 2px solid var(--border);
  border-radius: var(--radius-1);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  flex-shrink: 0;
}

.site-header__menu-toggle:hover {
  border-color: var(--accent-cyan);
  background-color: var(--bg-surface);
}

.site-header__menu-toggle:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.site-header__menu-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  transform-origin: center;
}

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

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

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

.site-header__nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: nowrap;
}

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

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch-target-min);
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.site-header__nav-link:hover {
  color: var(--accent-cyan);
  text-decoration: none;
  border-bottom-color: var(--accent-cyan);
}

.site-header__nav-link:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
  border-radius: var(--radius-1);
}

.site-header__nav-link[aria-current="page"] {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

/* Mobile navigation */
@media (max-width: 991px) {
  .site-header__menu-toggle {
    display: flex;
  }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 2px solid var(--border);
    box-shadow: var(--shadow-card);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    display: none;
    padding: var(--space-3) var(--container-padding);
    z-index: 99;
  }

  .site-header__nav.is-open {
    display: block;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
  }

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

  .site-header__nav-link {
    width: 100%;
    justify-content: center;
    padding: var(--space-2) var(--space-3);
    border-bottom: none;
    border-left: 2px solid transparent;
  }

  .site-header__nav-link:hover {
    border-left-color: var(--accent-cyan);
    border-bottom-color: transparent;
  }

  .site-header__nav-link[aria-current="page"] {
    border-left-color: var(--accent-cyan);
    border-bottom-color: transparent;
  }
}

@media (max-width: 767px) {
  .site-header__logo {
    width: 32px;
    height: 32px;
  }

  .site-header__brand-text {
    font-size: 18px;
  }
}