/* Footer Styles */
.site-footer {
  background-color: var(--clr-dark);
  color: var(--clr-slate-400);
  padding-top: 5rem;
  padding-bottom: 2rem;
  margin-top: auto;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--clr-primary), var(--clr-accent), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-col-title {
  color: var(--clr-white);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  position: relative;
}

.footer-col-title::after {
  content: '';
  display: block;
  width: 24px;
  height: 3px;
  background: var(--clr-primary);
  margin-top: 0.5rem;
  border-radius: var(--radius-full);
}

.footer-about p {
  color: var(--clr-slate-400);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-social-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background-color: var(--clr-slate-800);
  color: var(--clr-slate-300);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.footer-social-btn:hover {
  background-color: var(--clr-primary);
  color: var(--clr-white);
  transform: translateY(-3px);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--clr-slate-400);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.footer-links a:hover {
  color: var(--clr-white);
  transform: translateX(4px);
}

/* Footer Newsletter */
.footer-newsletter p {
  color: var(--clr-slate-400);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.newsletter-input {
  background-color: var(--clr-slate-800);
  border: 1px solid var(--clr-slate-700);
  color: var(--clr-white);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  outline: none;
}

.newsletter-input:focus {
  border-color: var(--clr-primary);
}

/* Footer Bottom */
.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--clr-slate-800);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--clr-slate-500);
}

@media (max-width: 640px) {
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* Floating Back-to-Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--clr-primary-gradient);
  color: var(--clr-white);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(4, 120, 87, 0.4);
}