/* ── KNOWU PREMIUM FOOTER ── */
:root {
  --obsidian: #0B0B0F;
  --white: #F8FAFC;
  --slate-400: #94A3B8;
  --violet: #7C3AED;
  --glass-border: rgba(255, 255, 255, 0.08);
}

footer {
  background-color: var(--obsidian);
  border-top: 1px solid var(--glass-border);
  padding: 80px 10%;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
}

.footer-logo {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 24px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.footer-logo span { color: var(--violet); }

.footer-tagline {
  font-size: 14px;
  color: var(--slate-400);
  line-height: 1.6;
  max-width: 300px;
}

.footer-col-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--violet);
  margin-bottom: 24px;
}

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

.footer-links a {
  font-size: 14px;
  color: var(--slate-400);
  text-decoration: none;
  transition: all 0.2s;
}

.footer-links a:hover { color: var(--white); transform: translateX(5px); }

.footer-bottom {
  background-color: var(--obsidian);
  border-top: 1px solid var(--glass-border);
  padding: 30px 10%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  font-size: 11px;
  color: var(--slate-400);
  text-transform: uppercase;
  letter-spacing: 1px;
}

@media (max-width: 900px) {
  footer { grid-template-columns: 1fr 1fr; padding: 40px 5%; }
  .footer-bottom { padding: 20px 5%; flex-direction: column; gap: 15px; text-align: center; }
}