/**
 * Component: Site Footer
 *
 * Institutional closing registry for Digentus One.
 * Supports marketing and authenticated application modes.
 */

@layer components {
  /* ==========================================================================
     1. Root
     ========================================================================== */

  .dig-footer {
    color: var(--dig-color-text-muted);
  }

  .dig-footer--marketing {
    padding-block: clamp(4.5rem, 7vw, 6.5rem) clamp(1.5rem, 3vw, 2.25rem);

    background-color: var(--dig-color-bg-alt);
    border-top: 1px solid var(--dig-color-border-subtle);
  }

  .dig-footer--app {
    padding-block: var(--dig-spacing-sm);

    background-color: var(--dig-color-bg);
    border-top: 1px solid var(--dig-color-border-subtle);
  }

  /* ==========================================================================
     2. Marketing Primary Grid
     ========================================================================== */

  .dig-footer__primary {
    display: grid;
    grid-template-columns:
      minmax(20rem, 2fr)
      repeat(3, minmax(8rem, 0.75fr));
    gap: clamp(2.5rem, 5vw, 6rem);

    padding-bottom: clamp(3.5rem, 6vw, 5.5rem);
  }

  /* ==========================================================================
     3. Brand
     ========================================================================== */

  .dig-footer-brand {
    min-width: 0;
  }

  .dig-footer-logo {
    display: block;

    width: fit-content;
    max-width: 100%;
    margin-bottom: clamp(1.25rem, 2vw, 1.75rem);
  }

  .dig-footer-logo img {
    width: auto;
    height: clamp(1.5rem, 1.4rem + 0.3vw, 1.875rem);
  }

  .dig-footer-tagline {
    margin: 0 0 clamp(1rem, 1.8vw, 1.35rem);

    color: var(--dig-color-primary);

    font-family: var(--dig-font-mono);
    font-size: var(--dig-font-size-xs);
    font-weight: var(--dig-font-weight-semibold);
    line-height: 1.4;
    letter-spacing: var(--dig-letter-spacing-mono);
    text-transform: uppercase;
  }

  .dig-footer-description {
    max-width: 32rem;
    margin: 0;

    color: var(--dig-color-text-muted);

    font-size: clamp(0.9rem, 0.86rem + 0.15vw, 0.975rem);
    line-height: var(--dig-line-height-body);
    text-wrap: pretty;
  }

  .dig-footer-email {
    display: inline-flex;

    margin-top: clamp(1.25rem, 2vw, 1.75rem);

    color: var(--dig-color-primary);

    font-size: var(--dig-font-size-small);
    font-weight: var(--dig-font-weight-semibold);
    line-height: 1.4;
    text-decoration: none;

    transition: color var(--dig-transition-fast);
  }

  .dig-footer-email:hover,
  .dig-footer-email:focus-visible {
    color: var(--dig-color-secondary-dark);
  }

  /* ==========================================================================
     4. Social Links
     ========================================================================== */

  .dig-footer-social {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--dig-spacing-xs);

    margin-top: clamp(1.5rem, 3vw, 2.25rem);
  }

  .dig-footer-social__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 2.5rem;
    height: 2.5rem;

    background-color: transparent;
    border: 1px solid var(--dig-color-border);
    border-radius: var(--dig-radius-md);

    color: var(--dig-color-primary);
    text-decoration: none;

    transition:
      background-color var(--dig-transition-fast),
      border-color var(--dig-transition-fast),
      color var(--dig-transition-fast);
  }

  .dig-footer-social__link:hover,
  .dig-footer-social__link:focus-visible {
    background-color: var(--dig-color-bg);
    border-color: var(--dig-color-primary);

    color: var(--dig-color-secondary-dark);
  }

  .dig-footer-social__icon {
    font-size: clamp(0.9rem, 0.85rem + 0.15vw, 1rem);
  }

  /* ==========================================================================
     5. Navigation
     ========================================================================== */

  .dig-footer-nav {
    min-width: 0;
  }

  .dig-footer-nav-title {
    margin: 0 0 clamp(1.25rem, 2vw, 1.75rem);

    color: var(--dig-color-text);

    font-family: var(--dig-font-mono);
    font-size: var(--dig-font-size-xs);
    font-weight: var(--dig-font-weight-semibold);
    line-height: 1;
    letter-spacing: var(--dig-letter-spacing-mono);
    text-transform: uppercase;
  }

  .dig-footer-nav ul {
    display: grid;
    gap: clamp(0.75rem, 1.4vw, 1rem);

    margin: 0;
    padding: 0;

    list-style: none;
  }

  .dig-footer-nav li {
    margin: 0;
  }

  .dig-footer-nav a {
    color: var(--dig-color-text-muted);

    font-size: clamp(0.875rem, 0.84rem + 0.12vw, 0.95rem);
    line-height: 1.5;
    text-decoration: none;

    transition:
      color var(--dig-transition-fast),
      padding-left var(--dig-transition-fast);
  }

  .dig-footer-nav a:hover,
  .dig-footer-nav a:focus-visible {
    padding-left: 0.2rem;

    color: var(--dig-color-primary);
  }

  /* ==========================================================================
     6. Institutional Registry
     ========================================================================== */

  .dig-footer__registry {
    display: grid;
    grid-template-columns:
      minmax(0, 1fr)
      auto
      minmax(0, 1fr);
    align-items: center;
    gap: clamp(1.5rem, 3vw, 3rem);

    padding-top: clamp(1.5rem, 3vw, 2.25rem);

    border-top: 1px solid var(--dig-color-border);
  }

  .dig-footer-status {
    display: inline-flex;
    align-items: center;
    gap: var(--dig-spacing-xs);

    min-width: 0;

    color: var(--dig-color-text-muted);

    font-size: var(--dig-font-size-xs);
    line-height: 1.4;
  }

  .dig-footer-status__indicator {
    position: relative;

    flex: 0 0 auto;

    width: 0.45rem;
    height: 0.45rem;

    background-color: var(--dig-color-success);
    border-radius: var(--dig-radius-full);

    box-shadow: 0 0 0.5rem
      color-mix(in srgb, var(--dig-color-success) 35%, transparent);
  }

  .dig-footer-status__indicator::after {
    content: "";

    position: absolute;
    inset: -0.22rem;

    border: 1px solid
      color-mix(in srgb, var(--dig-color-success) 45%, transparent);
    border-radius: inherit;

    opacity: 0;

    animation: d1-footer-status-pulse 2.8s ease-out infinite;
  }

  .dig-footer-status__label {
    color: var(--dig-color-text-muted);

    font-family: var(--dig-font-mono);
    font-weight: var(--dig-font-weight-semibold);
    letter-spacing: var(--dig-letter-spacing-label);
    text-transform: uppercase;
  }

  .dig-footer-status__value {
    overflow: hidden;

    color: var(--dig-color-primary);

    font-weight: var(--dig-font-weight-semibold);
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  @keyframes d1-footer-status-pulse {
    0% {
      opacity: 0;
      transform: scale(0.75);
    }

    20% {
      opacity: 0.55;
    }

    100% {
      opacity: 0;
      transform: scale(1.8);
    }
  }

  /* ==========================================================================
     7. Registry Action
     ========================================================================== */

  .dig-footer-primary-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--dig-spacing-xs);

    color: var(--dig-color-primary);

    font-size: var(--dig-font-size-small);
    font-weight: var(--dig-font-weight-semibold);
    line-height: 1.4;
    text-decoration: none;
    white-space: nowrap;

    transition:
      color var(--dig-transition-fast),
      gap var(--dig-transition-fast);
  }

  .dig-footer-primary-link:hover,
  .dig-footer-primary-link:focus-visible {
    gap: var(--dig-spacing-sm);

    color: var(--dig-color-secondary-dark);
  }

  /* ==========================================================================
     8. Copyright
     ========================================================================== */

  .dig-footer-copyright {
    justify-self: end;

    margin: 0;

    color: var(--dig-color-text-muted);

    font-family: var(--dig-font-mono);
    font-size: var(--dig-font-size-xs);
    line-height: 1.5;
    text-align: right;
  }

  /* ==========================================================================
     9. Application Footer
     ========================================================================== */

  .dig-app-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--dig-spacing-xs);

    color: var(--dig-color-text-muted);

    font-size: var(--dig-font-size-xs);
    line-height: 1.5;

    opacity: 0.7;
  }

  .dig-app-footer__product {
    color: var(--dig-color-text);

    font-weight: var(--dig-font-weight-semibold);
  }

  .dig-app-footer__separator {
    font-family: var(--dig-font-mono);
  }

  /* ==========================================================================
     10. Tablet
     ========================================================================== */

  @media (max-width: 62rem) {
    .dig-footer__primary {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .dig-footer-brand {
      grid-column: 1 / -1;

      padding-bottom: clamp(2rem, 5vw, 3rem);

      border-bottom: 1px solid var(--dig-color-border);
    }

    .dig-footer__registry {
      grid-template-columns: minmax(0, 1fr) auto;
    }

    .dig-footer-copyright {
      grid-column: 1 / -1;
      justify-self: start;

      text-align: left;
    }
  }

  /* ==========================================================================
     11. Mobile
     ========================================================================== */

  @media (max-width: 48rem) {
    .dig-footer--marketing {
      padding-block: clamp(3.5rem, 12vw, 5rem) clamp(1.5rem, 6vw, 2rem);
    }

    .dig-footer__primary {
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: clamp(2.5rem, 10vw, 4rem) var(--dig-spacing-md);
    }

    .dig-footer-brand {
      grid-column: 1 / -1;
    }

    .dig-footer-nav:last-child {
      grid-column: 1 / -1;

      padding-top: var(--dig-spacing-sm);

      border-top: 1px solid var(--dig-color-border-subtle);
    }

    .dig-footer-nav:last-child ul {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .dig-footer__registry {
      grid-template-columns: 1fr;
      align-items: start;
      gap: var(--dig-spacing-md);
    }

    .dig-footer-primary-link,
    .dig-footer-copyright {
      justify-self: start;

      text-align: left;
    }

    .dig-footer-status {
      align-items: flex-start;
      flex-wrap: wrap;
    }

    .dig-footer-status__value {
      width: 100%;
      padding-left: calc(0.45rem + var(--dig-spacing-xs));

      white-space: normal;
    }
  }

  @media (max-width: 30rem) {
    .dig-footer__primary {
      grid-template-columns: 1fr;
    }

    .dig-footer-brand,
    .dig-footer-nav:last-child {
      grid-column: 1;
    }
  }

  /* ==========================================================================
     12. Motion Preferences
     ========================================================================== */

  @media (prefers-reduced-motion: reduce) {
    .dig-footer-status__indicator::after {
      animation: none;
    }
  }
}