/* ────────────────────────────────────────────────
   ThetaZero Unified Footer — footer.css
   Used by public/js/footer.js
   All selectors scoped to #tz-footer / .tz-footer-*
──────────────────────────────────────────────── */

#tz-footer {
  background: #09090b;
  border-top: 1px solid #27272a;
  padding: 56px 32px 32px;
  font-family: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #a1a1aa;
}

/* Hide legacy footers when the unified footer is active */
body.tz-footer-active footer:not(#tz-footer) {
  display: none !important;
}

/* ── Inner grid ─────────────────────────────── */
.tz-footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: 1100px;
  margin: 0 auto 40px;
}

/* ── Brand column ───────────────────────────── */
.tz-footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tz-footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #fafafa;
}

.tz-footer-logo-mark {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, #22d3ee, #a78bfa);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  color: #09090b;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.tz-footer-wordmark {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.tz-footer-tagline {
  font-size: 13px;
  line-height: 1.6;
  color: #71717a;
  margin: 0;
  max-width: 280px;
}

/* ── Link columns ───────────────────────────── */
.tz-footer-col h4 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #52525b;
  margin: 0 0 14px;
}

.tz-footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tz-footer-col ul li a {
  font-size: 14px;
  color: #a1a1aa;
  text-decoration: none;
  transition: color 0.15s;
}

.tz-footer-col ul li a:hover {
  color: #fafafa;
}

/* ── Bottom bar ─────────────────────────────── */
.tz-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid #27272a;
  font-size: 12px;
  color: #52525b;
}

.tz-footer-bottom p {
  margin: 0;
}

.tz-footer-bottom-links {
  display: flex;
  gap: 20px;
}

.tz-footer-bottom-links a {
  color: #52525b;
  text-decoration: none;
  font-size: 12px;
  transition: color 0.15s;
}

.tz-footer-bottom-links a:hover {
  color: #a1a1aa;
}

/* ── Responsive ─────────────────────────────── */
@media (max-width: 900px) {
  .tz-footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .tz-footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  #tz-footer {
    padding: 40px 20px 24px;
  }

  .tz-footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .tz-footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .tz-footer-bottom-links {
    gap: 16px;
  }
}

@media (max-width: 400px) {
  .tz-footer-inner {
    grid-template-columns: 1fr;
  }
}