@layer components {
  .site-header {
    position: relative;
    z-index: 1000;
    background-color: var(--color-paper);
    border-bottom: 1px solid rgba(43, 43, 43, 0.2);
    width: 100%;
  }

  .site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-16);
    min-height: 72px;
    padding-block: var(--space-8);
  }

  .site-header__brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-12);
    flex-shrink: 0;
    text-decoration: none;
    color: var(--color-graphite);
    transition: color var(--transition-fast);
  }

  .site-header__brand:hover {
    color: var(--color-cobalt);
  }

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

  .site-header__wordmark {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.2;
    white-space: nowrap;
  }

  .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(--space-24);
    margin: 0;
    padding: 0;
    list-style: none;
    flex-wrap: nowrap;
  }

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

  .site-header__nav-link {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding-block: var(--space-8);
    font-family: var(--font-body);
    font-size: var(--nav-font-size);
    font-weight: var(--nav-font-weight);
    color: var(--nav-link-color);
    text-decoration: none;
    letter-spacing: 0.01em;
    line-height: 1.2;
    white-space: nowrap;
    transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
    text-underline-offset: 4px;
    text-decoration-thickness: 2px;
    text-decoration-color: transparent;
  }

  .site-header__nav-link:hover {
    color: var(--nav-link-hover-color);
    text-decoration-color: var(--nav-underline-color);
  }

  .site-header__nav-link:active {
    color: var(--nav-link-active-color);
  }

  .site-header__nav-link[aria-current="page"] {
    color: var(--nav-link-active-color);
    text-decoration-color: var(--nav-underline-color);
  }

  .site-header__toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    border: 1px solid rgba(43, 43, 43, 0.2);
    border-radius: var(--radius-4);
    background-color: transparent;
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
  }

  .site-header__toggle:hover {
    background-color: rgba(31, 58, 138, 0.06);
    border-color: var(--color-cobalt);
  }

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

  .site-header__toggle[aria-expanded="true"] {
    background-color: rgba(31, 58, 138, 0.1);
    border-color: var(--color-cobalt);
  }

  .site-header__toggle-icon {
    position: relative;
    display: block;
    width: 20px;
    height: 14px;
  }

  .site-header__toggle-icon::before,
  .site-header__toggle-icon::after {
    content: "";
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-graphite);
    transition: transform var(--transition-fast), top var(--transition-fast), background-color var(--transition-fast);
  }

  .site-header__toggle-icon::before {
    top: 0;
  }

  .site-header__toggle-icon::after {
    top: 12px;
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
    top: 6px;
    transform: rotate(45deg);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
    top: 6px;
    transform: rotate(-45deg);
  }

  @media (max-width: 1023px) {
    .site-header__toggle {
      display: inline-flex;
    }

    .site-header__nav {
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      background-color: var(--color-paper-deep);
      border-bottom: 1px solid rgba(43, 43, 43, 0.2);
      box-shadow: var(--shadow-lifted);
      max-height: calc(100vh - 72px);
      overflow-y: auto;
      padding: var(--space-16) var(--space-24) var(--space-24);
      display: none;
      z-index: 999;
    }

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

    .site-header__nav-list {
      flex-direction: column;
      align-items: stretch;
      gap: var(--space-4);
      width: 100%;
    }

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

    .site-header__nav-link {
      display: flex;
      width: 100%;
      min-height: 48px;
      padding: var(--space-12) var(--space-8);
      border-radius: var(--radius-4);
      font-size: 1rem;
    }

    .site-header__nav-link:hover {
      background-color: rgba(31, 58, 138, 0.06);
      text-decoration: none;
    }
  }

  @media (max-width: 767px) {
    .site-header__inner {
      min-height: 64px;
      gap: var(--space-8);
    }

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

    .site-header__wordmark {
      font-size: 1rem;
    }

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