/* ==========================================================================
   DEPUBAC — Footer
   ========================================================================== */

.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.75);
  padding: var(--sp-20) 0 var(--sp-8);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-bio), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--sp-12);
  margin-bottom: var(--sp-16);
}

.footer-brand__logo {
  height: 72px;
  width: auto;
  margin-bottom: var(--sp-5);
}

.footer-brand__tagline {
  color: rgba(255,255,255,0.7);
  font-size: var(--fs-sm);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col__title {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  color: var(--color-bio);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--sp-5);
}

.footer-col__list {
  list-style: none;
  padding: 0;
}

.footer-col__list li {
  margin-bottom: var(--sp-3);
}

.footer-col__list a {
  color: rgba(255,255,255,0.8);
  font-size: var(--fs-sm);
  text-decoration: none;
  transition: color var(--t-fast);
}

.footer-col__list a:hover {
  color: var(--color-bio);
}

.footer-bottom {
  padding-top: var(--sp-6);
  border-top: 1px solid rgba(255,255,255,0.12);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-4);
}

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

.footer-bottom__links {
  display: flex;
  gap: var(--sp-5);
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-bottom__links a {
  color: rgba(255,255,255,0.5);
  font-size: var(--fs-sm);
  text-decoration: none;
}

.footer-bottom__links a:hover {
  color: var(--color-bio);
}

/* Botón WhatsApp en el pie */
.footer-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #25D366;
  color: #fff !important;
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  text-decoration: none;
  border-radius: 999px;
  transition: background var(--t-fast), transform var(--t-fast);
  line-height: 1;
}
.footer-whatsapp:hover {
  background: #1DA851;
  color: #fff !important;
  transform: translateY(-1px);
}
.footer-whatsapp__icon {
  width: 18px;
  height: 18px;
  fill: currentColor;
  flex-shrink: 0;
}