/* ==========================================================================
   AuditHub Landing Page - Footer Component
   4-Column Layout with Dark Background
   ========================================================================== */

/* --------------------------------------------------------------------------
   Footer Base
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr repeat(2, 1fr);
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-12);
}

/* --------------------------------------------------------------------------
   Footer Brand Column
   -------------------------------------------------------------------------- */
.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: inline-block;
  margin-bottom: var(--spacing-4);
}

.footer-logo img {
  height: 32px;
  width: auto;
}

.footer-description {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-6);
}

/* Social Links */
.footer-social {
  display: flex;
  gap: var(--spacing-3);
}

.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg-dark-secondary);
  color: rgba(255, 255, 255, 0.7);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.footer-social-link:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.footer-social-link svg {
  width: 20px;
  height: 20px;
}

/* --------------------------------------------------------------------------
   Footer Links Columns
   -------------------------------------------------------------------------- */
.footer-column {
  display: flex;
  flex-direction: column;
}

.footer-column-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-inverse);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer-link {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-text-inverse);
}

/* --------------------------------------------------------------------------
   Trust Badges
   -------------------------------------------------------------------------- */
.footer-trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  margin-top: var(--spacing-6);
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  background-color: var(--color-bg-dark-secondary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.7);
}

.trust-badge svg {
  width: 16px;
  height: 16px;
  color: var(--color-success);
}

/* --------------------------------------------------------------------------
   Footer Bottom
   -------------------------------------------------------------------------- */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--font-size-sm);
}

.footer-bottom-links {
  display: flex;
  gap: var(--spacing-6);
}

.footer-bottom-link {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-bottom-link:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* --------------------------------------------------------------------------
   Responsive Styles
   -------------------------------------------------------------------------- */
@media (max-width: 1023px) {
  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-10);
  }

  .footer-brand {
    grid-column: span 2;
    max-width: 100%;
  }
}

@media (max-width: 767px) {
  .footer {
    padding: var(--spacing-12) 0 var(--spacing-6);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

  .footer-brand {
    grid-column: span 1;
    text-align: center;
  }

  .footer-logo {
    display: block;
  }

  .footer-social {
    justify-content: center;
  }

  .footer-column {
    text-align: center;
  }

  .footer-links {
    align-items: center;
  }

  .footer-trust {
    justify-content: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }

  .footer-bottom-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-4);
  }
}

/* --------------------------------------------------------------------------
   Newsletter Form (Optional - for footer)
   -------------------------------------------------------------------------- */
.footer-newsletter {
  margin-top: var(--spacing-6);
}

.newsletter-form {
  display: flex;
  gap: var(--spacing-2);
}

.newsletter-input {
  flex: 1;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-dark-secondary);
  color: var(--color-text-inverse);
  font-size: var(--font-size-sm);
}

.newsletter-input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.newsletter-btn {
  padding: var(--spacing-3) var(--spacing-4);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.newsletter-btn:hover {
  background-color: var(--color-primary-hover);
}

@media (max-width: 767px) {
  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-btn {
    width: 100%;
  }
}