/* ==========================================================================
   TONALLITECH — Footer Component
   ========================================================================== */

.footer {
  border-top: 1px solid var(--tt-border);
  padding-top: var(--space-16);
  padding-bottom: var(--space-10);
  margin-top: auto;
  position: relative;
  overflow: hidden;
}

/* SD variant */
.footer--sd {
  border-top-color: var(--sd-border);
}

/* Ambient glow */
.footer::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 300px;
  background: radial-gradient(ellipse at center bottom, rgba(91,106,248,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.footer--sd::before {
  background: radial-gradient(ellipse at center bottom, rgba(34,197,94,0.04) 0%, transparent 70%);
}

/* ─── INNER ─── */
.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--section-padding-x);
}

/* ─── TOP GRID ─── */
.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-16);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--tt-border);
  margin-bottom: var(--space-8);
}

.footer--sd .footer__top {
  border-bottom-color: var(--sd-border);
}

/* Brand column */
.footer__brand {}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: var(--space-4);
  text-decoration: none;
}

.footer__logo-mark {
  width: 90px;
  height: 90px;
  max-width: 90px;
  border-radius: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  display: block;
  overflow: visible;
  object-fit: contain;
}

.footer--sd .footer__logo-mark {
  background: transparent;
  border-color: transparent;
}

.footer__logo-text {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--tt-text);
}

.footer__logo-text span {
  color: var(--tt-accent);
}

.footer--sd .footer__logo-text span {
  color: var(--sd-accent);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--tt-muted);
  line-height: 1.75;
  max-width: 280px;
  margin-bottom: var(--space-6);
}

.footer--sd .footer__tagline {
  color: var(--sd-muted);
}

/* Social links */
.footer__socials {
  display: flex;
  gap: var(--space-3);
}

.footer__social {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--tt-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tt-muted);
  font-size: 13px;
  transition: all var(--duration-fast) var(--ease);
  text-decoration: none;
}

.footer__social:hover {
  border-color: var(--tt-border-hover);
  color: var(--tt-text);
  background: rgba(255,255,255,0.04);
}

/* Nav columns */
.footer__nav-group {}

.footer__nav-title {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tt-text-2);
  margin-bottom: var(--space-4);
}

.footer--sd .footer__nav-title {
  color: var(--sd-text-2);
}

.footer__nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__nav-list a {
  font-size: var(--text-sm);
  color: var(--tt-muted);
  text-decoration: none;
  transition: color var(--duration-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__nav-list a:hover {
  color: var(--tt-text-2);
}

.footer--sd .footer__nav-list a:hover {
  color: var(--sd-text-2);
}

/* Ecosystem badges in footer */
.footer__eco-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-left: 4px;
}

.footer__eco-badge--sd {
  background: var(--sd-accent-dim);
  color: var(--sd-accent);
  border: 1px solid rgba(34,197,94,0.2);
}

.footer__eco-badge--ac {
  background: var(--tt-accent2-dim);
  color: var(--tt-accent2);
  border: 1px solid rgba(139,92,246,0.2);
}

/* ─── BOTTOM BAR ─── */
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer__copyright {
  font-size: var(--text-xs);
  color: var(--tt-muted-2);
  letter-spacing: 0.04em;
}

.footer__copyright a {
  color: var(--tt-muted);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.footer__copyright a:hover {
  color: var(--tt-text);
}

.footer__ecosystem-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer__eco-link {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  color: var(--tt-muted-2);
  text-decoration: none;
  letter-spacing: 0.06em;
  transition: color var(--duration-fast);
}

.footer__eco-link:hover {
  color: var(--tt-muted);
}

.footer__eco-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
}
.footer__eco-dot--tt { background: var(--tt-accent); }
.footer__eco-dot--sd { background: var(--sd-accent); }
.footer__eco-dot--ac { background: var(--tt-accent2); }

.footer__legal {
  display: flex;
  gap: var(--space-5);
}

.footer__legal a {
  font-size: var(--text-xs);
  color: var(--tt-muted-2);
  text-decoration: none;
  transition: color var(--duration-fast);
  letter-spacing: 0.04em;
}

.footer__legal a:hover {
  color: var(--tt-muted);
}

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
  .footer__top {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-10);
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer__brand {
    grid-column: 1 / -1;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .footer__ecosystem-links {
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  .footer__legal {
    flex-wrap: wrap;
    gap: var(--space-3);
  }
}