/* CoLab Haus — Footer (Dark Prismatic Theme) */

.footer {
  background: var(--ch-black);
  color: var(--ch-gray-400);
  padding: var(--ch-space-4xl) 0 var(--ch-space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--ch-space-3xl);
  margin-bottom: var(--ch-space-3xl);
}

.footer__brand {
  max-width: 320px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--ch-space-sm);
  font-family: var(--ch-font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ch-white);
  margin-bottom: var(--ch-space-lg);
  text-decoration: none;
}

.footer__logo:hover { color: var(--ch-white); }
.footer__logo span {
  background: linear-gradient(135deg, var(--ch-prism-vivid-mint), var(--ch-prism-vivid-violet), var(--ch-prism-vivid-peach));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: prismFlow 6s linear infinite;
}

.footer__tagline {
  font-size: var(--ch-text-sm);
  line-height: 1.7;
  margin-bottom: var(--ch-space-lg);
}

.footer__address {
  font-size: var(--ch-text-sm);
  font-style: normal;
  line-height: 1.7;
  color: var(--ch-gray-500);
}

.footer__heading {
  font-family: var(--ch-font-display);
  font-size: var(--ch-text-sm);
  font-weight: 600;
  color: var(--ch-white);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--ch-space-lg);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--ch-space-sm);
}

.footer__link {
  font-size: var(--ch-text-sm);
  color: var(--ch-gray-400);
  text-decoration: none;
  transition: color var(--ch-duration) var(--ch-ease);
}

.footer__link:hover {
  color: var(--ch-white);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--ch-space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: var(--ch-text-xs);
}

.footer__copy {
  color: var(--ch-gray-500);
}

.footer__socials {
  display: flex;
  gap: var(--ch-space-md);
}

.footer__social {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--ch-radius-md);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ch-gray-400);
  transition: all var(--ch-duration) var(--ch-ease);
}

.footer__social:hover {
  background: var(--ch-prism-vivid-violet);
  color: var(--ch-white);
}

@media (max-width: 900px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }
  .footer__bottom {
    flex-direction: column;
    gap: var(--ch-space-md);
    text-align: center;
  }
}