/* ==========================================================================
   QASTCO Footer — 4-Column Layout
   ========================================================================== */

.site-footer {
  background: var(--color-dark);
  color: #CBD5E1;
  padding: var(--space-16) 0 0;
}

.site-footer a {
  color: #CBD5E1;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.site-footer a:hover {
  color: var(--color-white);
}

/* --- Footer Grid --- */

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
}

/* --- Footer Brand Column --- */

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

.site-footer__logo {
  font-size: 24px;
  font-weight: var(--font-weight-black);
  color: var(--color-primary);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  display: block;
}

.site-footer__logo-img {
  height: 56px;
  width: auto;
  margin-bottom: var(--space-4);
}

.site-footer__brand p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: #94A3B8;
  margin-bottom: var(--space-6);
}

/* --- Social Links --- */

.site-footer__social {
  display: flex;
  gap: var(--space-3);
}

.site-footer__social-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-fast) var(--ease-default);
}

.site-footer__social-link svg {
  width: 18px;
  height: 18px;
}

.site-footer__social-link:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* --- Footer Columns --- */

.site-footer__col-title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-5);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-footer__link {
  font-size: var(--text-sm);
  color: #94A3B8;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-footer__link:hover {
  color: var(--color-white);
}

/* --- Contact Info --- */

.site-footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  color: #94A3B8;
}

.site-footer__contact-icon {
  flex-shrink: 0;
  font-size: 16px;
  margin-top: 2px;
}

.site-footer__contact-item a {
  color: #94A3B8;
}

.site-footer__contact-item a:hover {
  color: var(--color-white);
}

/* --- Footer Bottom Bar --- */

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--space-12);
  padding: var(--space-6) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

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

.site-footer__copyright {
  font-size: var(--text-xs);
  color: #94A3B8;
}

.site-footer__legal {
  display: flex;
  gap: var(--space-5);
}

.site-footer__legal a {
  font-size: var(--text-xs);
  color: #94A3B8;
}

.site-footer__legal a:hover {
  color: var(--color-white);
}

.site-footer__version {
  font-size: 0.625rem;
  color: rgba(255, 255, 255, 0.55);
}

/* --- Floating WhatsApp Button --- */

.whatsapp-float {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 900;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: #25D366;
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  transition: transform var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  color: var(--color-white);
}

.whatsapp-float svg {
  width: 28px;
  height: 28px;
}