/* Header component styles */
.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-paper);
  border-bottom: var(--rule-thickness) solid var(--color-rule);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter);
  min-height: 72px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-ink-strong);
  justify-self: center;
  min-width: 0;
}

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

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  line-height: 1.2;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

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

.site-header__nav--left {
  justify-self: start;
}

.site-header__nav--right {
  justify-self: end;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.site-header__nav-link {
  display: inline-block;
  padding: var(--space-2) 0;
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.site-header__nav-link:hover {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-header__nav-link:focus-visible {
  outline: var(--focus-outline-width) solid var(--color-accent);
  outline-offset: var(--focus-outline-offset);
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  border-radius: var(--radius-small);
  cursor: pointer;
  justify-self: end;
  grid-column: 3;
}

.site-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-ink-strong);
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}

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

.site-header__toggle:focus-visible {
  outline: var(--focus-outline-width) solid var(--color-accent);
  outline-offset: var(--focus-outline-offset);
}

.site-header__mobile-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-paper);
  border-bottom: var(--rule-thickness) solid var(--color-rule);
  max-height: calc(100vh - 72px);
  overflow-y: auto;
  z-index: 999;
  padding: var(--space-5) var(--container-gutter);
}

.site-header__mobile-nav[hidden] {
  display: none;
}

.site-header__mobile-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-header__mobile-nav-item {
  margin: 0;
  padding: 0;
}

.site-header__mobile-nav-link {
  display: block;
  padding: var(--space-3) 0;
  font-family: var(--font-heading);
  font-size: var(--text-h3-size);
  line-height: var(--text-h3-leading);
  color: var(--color-ink-strong);
  text-decoration: none;
  border-bottom: var(--rule-thickness) solid var(--color-rule-light);
}

.site-header__mobile-nav-link:hover {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-header__mobile-nav-link:focus-visible {
  outline: var(--focus-outline-width) solid var(--color-accent);
  outline-offset: var(--focus-outline-offset);
}

@media (max-width: 1023px) {
  .site-header__nav {
    display: none;
  }

  .site-header__inner {
    grid-template-columns: 1fr auto 1fr;
  }

  .site-header__brand {
    grid-column: 2;
  }

  .site-header__toggle {
    display: flex;
    grid-column: 3;
  }
}

@media (max-width: 767px) {
  .site-header__inner {
    min-height: 64px;
  }

  .site-header__logo {
    width: 40px;
    height: 40px;
  }

  .site-header__brand-text {
    font-size: 1.25rem;
  }

  .site-header__mobile-nav {
    max-height: calc(100vh - 64px);
  }
}