/* Footer — Excavaciones BCN */

#footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-20);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-16);
  border-bottom: 1px solid var(--color-border);
}

/* ── Columna marca ── */
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.footer-logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-extrabold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
}
.footer-logo strong { color: var(--color-primary); }
.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  max-width: 30ch;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.footer-contact-item:hover { color: var(--color-primary); }
.footer-contact-item svg { width: 16px; height: 16px; color: var(--color-primary); flex-shrink: 0; }

.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
}
.footer-social-link {
  width: 40px;
  height: 40px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}
.footer-social-link:hover {
  background: rgba(212, 117, 10, 0.1);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.footer-social-link svg { width: 18px; height: 18px; }

/* ── Columnas de links ── */
.footer-col h4 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text);
  margin-bottom: var(--space-5);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  padding: var(--space-1) 0;
}
.footer-link:hover { color: var(--color-primary); }

/* ── Footer bottom ── */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding-block: var(--space-6);
}
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  max-width: none;
}
.footer-legal {
  display: flex;
  gap: var(--space-6);
}
.footer-legal a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}
.footer-legal a:hover { color: var(--color-text-secondary); }

/* ── Accent strip ── */
.footer-accent-strip {
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-primary));
  background-size: 200% 100%;
  animation: footer-gradient 4s linear infinite;
}
@keyframes footer-gradient {
  from { background-position: 0% 50%; }
  to   { background-position: 200% 50%; }
}