/* ── Footer ── */
.footer {
  padding: clamp(60px, 8vw, 100px) 0 0;
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: var(--blue);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  margin-bottom: clamp(48px, 8vw, 80px);
}

/* Brand column */
.footer-brand .nav-logo {
  margin-bottom: 20px;
}

.footer-brand p {
  color: var(--gray-400);
  font-size: 14px;
  line-height: 1.7;
  font-weight: 300;
  max-width: 280px;
  margin-bottom: 28px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social-link {
  width: 36px;
  height: 36px;
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: all var(--duration-normal) var(--ease-out);
  color: var(--gray-400);
}

.footer-social-link:hover {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
  transform: translateY(-2px);
}

/* Link columns */
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 20px;
  font-weight: 500;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 14px;
  color: var(--gray-600);
  transition: color var(--duration-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-links a::before {
  content: '';
  width: 0;
  height: 1px;
  background: var(--blue);
  transition: width var(--duration-normal) var(--ease-out);
  display: inline-block;
}

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

.footer-links a:hover::before {
  width: 12px;
}

/* Bottom bar */
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-copyright {
  font-size: 12px;
  color: var(--gray-600);
}

.footer-copyright span {
  color: var(--blue);
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  font-size: 12px;
  color: var(--gray-600);
  transition: color var(--duration-fast);
}

.footer-legal a:hover {
  color: var(--gray-400);
}

/* Status indicator */
.footer-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--success);
  letter-spacing: 0.1em;
}

.footer-status-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-legal {
    flex-wrap: wrap;
    justify-content: center;
  }
}