/* Shared public shell for janus.guru landing and pilot pages.
   Keep page-specific layout/content styles inside the HTML files and
   treat this file as the single source of truth for shared chrome. */
@layer janus-shell {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
    color-scheme: light;
  }

  a {
    color: var(--color-accent-primary-hover);
    text-decoration: none;
  }

  a:hover {
    text-decoration: underline;
  }

  img {
    display: block;
    max-width: 100%;
  }

  .header {
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--color-border-subtle);
    backdrop-filter: blur(16px);
    background: var(--surface-header);
    transition: box-shadow 0.2s ease, background 0.2s ease;
  }

  .header.is-scrolled {
    background: var(--surface-header-scrolled);
    box-shadow: var(--shadow-header, 0 1px 0 rgba(26, 23, 20, 0.06));
  }

  .header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-px);
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-primary);
    text-decoration: none;
    flex: 0 0 auto;
  }

  .logo:hover,
  .footer-brand-link:hover {
    text-decoration: none;
  }

  .logo-text {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 7px;
    white-space: nowrap;
  }

  .logo-dot {
    color: var(--color-accent-primary);
  }

  .logo-img,
  .logo img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    opacity: 0.9;
  }

  .nav {
    display: flex;
    gap: 24px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .nav a {
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s;
    letter-spacing: 0;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }

  .nav a:hover {
    color: var(--color-text-primary);
    text-decoration: none;
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
  }

  .lang-switcher {
    display: inline-flex;
    align-items: center;
    gap: 4px;
  }

  .lang-switcher button {
    font: inherit;
  }

  .lang-switcher.is-dormant button {
    color: var(--color-text-secondary);
  }

  .mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    padding: 8px;
    min-width: 44px;
    min-height: 44px;
  }

  .footer {
    padding: 44px var(--container-px) 24px;
    font-size: 13px;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border-subtle);
    background: var(--surface-muted);
  }

  .footer-shell,
  .footer-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    gap: 18px;
  }

  .footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0;
    color: var(--color-text-primary);
  }

  .footer-brand-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--color-text-primary);
    text-decoration: none;
  }

  .footer-logo,
  .footer-brand img {
    width: 20px;
    height: 20px;
    opacity: 0.45;
  }

  .footer-tagline {
    max-width: 560px;
    margin: 0 auto;
    text-align: center;
    font-size: 14px;
    line-height: 1.65;
    color: var(--color-text-secondary);
  }

  .footer-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
    max-width: 720px;
    margin: 0 auto;
  }

  .footer-nav-group {
    display: grid;
    gap: 10px;
    justify-items: center;
    text-align: center;
  }

  .footer-nav-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-text-muted);
  }

  .footer-links {
    display: grid;
    gap: 8px;
    justify-items: center;
    font-size: 14px;
  }

  .footer-links a {
    color: var(--color-text-primary);
    text-decoration: none;
  }

  .footer-bottom {
    margin-top: 4px;
    padding-top: 14px;
    border-top: 1px solid var(--color-border-subtle);
  }

  .footer-copy {
    max-width: 780px;
    margin: 0 auto;
    text-align: center;
    line-height: 1.65;
  }

  .footer-copy a {
    color: var(--color-text-secondary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
  }

  .footer-copy a:hover {
    color: var(--color-text-primary);
    border-bottom-color: var(--color-border-default);
    text-decoration: none;
  }

  .footer-tech {
    display: inline-flex;
    margin-left: 8px;
    font: 600 11px/1 'JetBrains Mono', 'SF Mono', Menlo, monospace;
    color: var(--color-text-secondary);
    letter-spacing: 0;
    padding: 4px 8px;
    border: 1px solid var(--color-border-subtle);
    border-radius: 999px;
    background: var(--surface-muted);
  }

  @media (max-width: 768px) {
    .header-actions {
      gap: 10px;
    }

    .nav {
      display: none;
    }

    .lang-switcher button {
      min-width: 36px;
      min-height: 30px;
      font-size: 10px;
    }

    .mobile-menu-btn {
      display: block;
    }

    .nav.open {
      display: flex;
      flex-direction: column;
      position: absolute;
      top: var(--header-h);
      left: 0;
      right: 0;
      background: var(--surface-base);
      padding: 12px 20px 18px;
      gap: 4px;
      border-bottom: 1px solid var(--color-border-subtle);
      box-shadow: var(--shadow-md);
      align-items: stretch;
      max-height: calc(100vh - var(--header-h));
      overflow-y: auto;
    }

    .nav.open a {
      justify-content: flex-start;
      padding: 10px 0;
      min-height: 40px;
    }
  }

  @media (max-width: 640px) {
    .footer {
      padding: 32px 20px 22px;
    }

    .footer-shell,
    .footer-inner {
      gap: 16px;
    }

    .footer-brand {
      font-size: 15px;
      gap: 6px;
    }

    .footer-tagline {
      font-size: 13px;
    }

    .footer-nav {
      grid-template-columns: 1fr;
      gap: 16px;
      max-width: 420px;
    }

    .footer-copy {
      max-width: 40ch;
    }
  }
}