/* ============================================
   YUGM AI - Footer
   ============================================ */

footer {
  margin-top: var(--space-12);
}

.footer-upper {
  padding: var(--space-12) 0 var(--space-10);
  background:
    linear-gradient(180deg, rgba(12, 22, 37, 0.92), rgba(8, 15, 27, 0.98)),
    radial-gradient(circle at top left, rgba(32, 131, 255, 0.08), transparent 28%);
  border-top: 1px solid rgba(178, 191, 212, 0.12);
}

.footer-upper-grid {
  display: grid;
  grid-template-columns: 1.35fr repeat(3, minmax(0, 1fr));
  gap: var(--space-8);
}

.footer-brand {
  max-width: 360px;
}

.footer-brand-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer-brand-logo img {
  width: auto;
  height: 72px;
  object-fit: contain;
}

.footer-brand-logo span {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: var(--font-extrabold);
  color: var(--color-text-white);
  letter-spacing: -0.03em;
}

.footer-brand-desc {
  max-width: 32ch;
  color: var(--color-text-white-secondary);
  font-size: var(--text-sm);
  line-height: 1.75;
}

.footer-column-title {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  color: var(--color-text-white);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-column-title::before {
  content: '';
  width: 18px;
  height: 2px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-soft));
}

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

.footer-link {
  color: var(--color-text-white-secondary);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.footer-link:hover {
  color: var(--color-text-white);
  transform: translateX(3px);
}

.footer-lower {
  padding: 0 0 var(--space-6);
  background: rgba(4, 9, 16, 0.94);
}

.footer-lower-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1.15fr;
  gap: var(--space-6);
  align-items: center;
  padding: var(--space-6) 0 var(--space-5);
  border-top: 1px solid rgba(178, 191, 212, 0.08);
  border-bottom: 1px solid rgba(178, 191, 212, 0.08);
}

.footer-lower-tagline {
  color: var(--color-text-white-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.footer-lower-center {
  display: flex;
  justify-content: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.footer-lower-link {
  color: var(--color-text-white-secondary);
  font-size: var(--text-sm);
}

.footer-lower-link:hover {
  color: var(--color-text-white);
}

.footer-lower-right {
  text-align: right;
}

.footer-lower-right p {
  color: var(--color-text-white-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.footer-lower-right a {
  color: var(--color-accent-soft);
}

.footer-lower-right a:hover {
  color: white;
}

.footer-copyright {
  margin-top: var(--space-5);
  text-align: center;
  color: var(--color-text-white-muted);
  font-size: 0.78rem;
}

@media (max-width: 1024px) {
  .footer-upper-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }

  .footer-brand-desc {
    max-width: 100%;
  }

  .footer-lower-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-lower-right {
    text-align: center;
  }
}

@media (max-width: 768px) {
  .footer-upper {
    padding: var(--space-10) 0 var(--space-8);
  }

  .footer-upper-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-brand-logo img {
    height: 64px;
  }

  .footer-lower-center {
    flex-direction: column;
    gap: var(--space-3);
  }
}