/**
 * AIAppDrop — Footer
 */

.aad-footer {
  margin-top: auto;
  border-top: 1px solid var(--bg-border);
  background: var(--bg-surface);
  padding: var(--space-16) 0 var(--space-8);
}

.aad-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

@media (max-width: 900px) {
  .aad-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  .aad-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.aad-footer__brand {
  max-width: 320px;
}

.aad-footer__brand .aad-logo {
  margin-bottom: var(--space-3);
  font-size: 1.125rem;
}

.aad-footer__tagline {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.35;
}

.aad-footer__desc {
  margin: 0;
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.55;
}

.aad-footer__col h4 {
  font-size: var(--text-2xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.aad-footer__col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.aad-footer__col a {
  font-size: var(--text-small);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.aad-footer__col a:hover {
  color: var(--text-primary);
}

.aad-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--bg-border);
}

.aad-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  min-width: 0;
}

.aad-footer__copy,
.aad-footer__credit {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.45;
}

.aad-footer__credit a {
  color: var(--text-secondary);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.aad-footer__credit a:hover {
  color: var(--brand-accent);
}

@media (min-width: 640px) {
  .aad-footer__legal {
    gap: 8px 16px;
  }

  .aad-footer__credit::before {
    content: "·";
    margin-right: 14px;
    color: var(--bg-border-strong);
    font-weight: 400;
  }
}

.aad-footer__social {
  display: flex;
  gap: var(--space-2);
}

.aad-footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  border: 1px solid transparent;
  transition:
    color var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast);
}

.aad-footer__social a:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
  border-color: var(--bg-border);
}

.aad-footer__social svg {
  width: 16px;
  height: 16px;
}