/* Footer */
.site-footer {
  background-color: var(--color-azul-rey-dark);
  color: rgba(255, 255, 255, 0.75);
  padding-top: var(--space-20);
}

.site-footer h4 {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--color-blanco);
  margin-bottom: var(--space-5);
}

.site-footer p {
  font-size: var(--fs-sm);
  line-height: var(--lh-loose);
  max-width: none;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--t-fast);
}

.site-footer a:hover {
  color: var(--color-blanco);
  opacity: 1;
}

/* Grid layout */
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-16);
}

@media (min-width: 640px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

/* Brand column */
.site-footer__brand img {
  height: 40px;
  width: auto;
  margin-bottom: var(--space-4);
}

/* Social icons */
.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--color-blanco);
  font-size: var(--fs-lg);
  transition: background var(--t-fast);
}

.footer-social a:hover {
  background: rgba(255, 255, 255, 0.2);
  opacity: 1;
}

/* Nav links */
.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav a {
  font-size: var(--fs-sm);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Contact info */
.footer-contact address {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-contact a {
  font-size: var(--fs-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

/* Instituto */
.footer-instituto img {
  height: 36px;
  width: auto;
  margin-bottom: var(--space-3);
  opacity: 0.85;
}

.footer-instituto p {
  font-size: var(--fs-xs);
  opacity: 0.7;
}

/* Bottom bar */
.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.site-footer__bottom small {
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.45);
}