/**
 * Site Footer — Canonical 4-column layout + bottom bar
 * Brand | Products | Company | Resources
 * Bottom: copyright | address | LinkedIn
 */

.footer {
  background: var(--gray-950);
  color: var(--gray-400);
  padding: var(--space-xl) 0 0;
  margin-top: auto;
}

.footer__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
}

/* Brand column */
.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer__brand-logo img {
  height: 1.75rem;
  width: auto;
  filter: brightness(10);
  opacity: 0.8;
}

.footer__brand-text {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--gray-400);
  max-width: 280px;
}

.footer__brand-contact {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: var(--space-2xs);
}

.footer__brand-contact a {
  font-size: var(--text-sm);
  color: var(--gray-400);
  transition: color var(--duration-fast) var(--ease-precision);
  text-decoration: none;
}

.footer__brand-contact a:hover {
  color: var(--e57-green);
}

/* Link columns */
.footer__heading {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--font-bold);
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  margin-bottom: var(--space-sm);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.footer__links a {
  display: block;
  font-size: var(--text-sm);
  color: var(--gray-400);
  padding: 3px 0;
  transition: color var(--duration-fast) var(--ease-precision);
  text-decoration: none;
}

.footer__links a:hover {
  color: var(--e57-green);
}

/* External link indicator */
.footer__links a[target="_blank"]::after {
  content: " \2197";
  font-size: 0.75em;
  opacity: 0.5;
}

/* Bottom bar */
.footer__bottom {
  max-width: var(--container-max);
  margin: var(--space-lg) auto 0;
  padding: var(--space-md) var(--space-md);
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--gray-500);
}

.footer__bottom-center {
  text-align: center;
}

.footer__bottom-right a {
  color: var(--gray-500);
  transition: color var(--duration-fast) var(--ease-precision);
  text-decoration: none;
}

.footer__bottom-right a:hover {
  color: var(--e57-green);
}

/* LinkedIn icon */
.footer__social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  transition: background var(--duration-fast) var(--ease-precision);
}

.footer__social-icon:hover {
  background: rgba(255,255,255,0.12);
}

.footer__social-icon svg {
  width: 14px;
  height: 14px;
  fill: var(--gray-400);
}

/* White variant (light-theme pages) */
.footer--white { background: #fff !important; color: var(--color-text-secondary); border-top: 1px solid #e2e4e8; }
.footer--white .footer__brand-logo img { filter: none; opacity: 1; }
.footer--white .footer__brand-text { color: var(--color-text-secondary); }
.footer--white .footer__brand-contact a { color: var(--color-text-secondary); }
.footer--white .footer__heading { color: var(--e57-blue-dark); }
.footer--white .footer__links a { color: var(--color-text-secondary); }
.footer--white .footer__links a:hover { color: var(--e57-green); }
.footer--white .footer__bottom { border-top-color: #e2e4e8; color: var(--color-text-muted); }
.footer--white .footer__social-icon { background: rgba(0,0,0,0.05); }
.footer--white .footer__social-icon svg { fill: var(--color-text-secondary); }

/* ── Responsive ── */

@media (max-width: 1024px) {
  .footer__container {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  .footer__container {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-2xs);
    text-align: center;
  }
}