/* ==========================================================================
   SPECTRUM ALLIANCE — FOOTER
   ========================================================================== */
.sa-footer {
  background: var(--sa-void);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: var(--space-20);
  padding-bottom: var(--space-10);
}
.sa-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-16);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.sa-footer__brand {}
.sa-footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.sa-footer__logo-img { height: 32px; width: auto; }
.sa-footer__logo-text {
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sa-white);
}
.sa-footer__tagline {
  font-size: var(--text-sm);
  color: var(--sa-ghost);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  max-width: 260px;
}
.sa-footer__principle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.sa-footer__principle-bar {
  display: inline-block;
  width: 40px;
  height: 2px;
  background: var(--sa-gradient-h);
  border-radius: 2px;
}

.sa-footer__col-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sa-silver);
  margin-bottom: var(--space-6);
}
.sa-footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.sa-footer__link {
  font-size: var(--text-sm);
  color: var(--sa-ghost);
  transition: color var(--dur-fast);
}
.sa-footer__link:hover { color: var(--sa-white); }

.sa-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.sa-footer__copy {
  font-size: var(--text-xs);
  color: var(--sa-muted);
}
.sa-footer__legal {
  display: flex;
  gap: var(--space-6);
}
.sa-footer__legal a {
  font-size: var(--text-xs);
  color: var(--sa-muted);
  transition: color var(--dur-fast);
}
.sa-footer__legal a:hover { color: var(--sa-silver); }

@media (max-width: 1024px) {
  .sa-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .sa-footer__grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .sa-footer__bottom { flex-direction: column; align-items: flex-start; }
}