/* ============================================
   FOOTER.CSS - Footer Styles
   Hebei Cangtie Industrial Co., Ltd.
============================================ */

#site-footer {
  background-color: var(--clr-bg-dark);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  color: rgba(255, 255, 255, 0.7);
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--clr-primary-dark),
    var(--clr-primary-light),
    var(--clr-accent),
    var(--clr-primary-light),
    var(--clr-primary-dark)
  );
}

/* Decorative background grid */
#site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 75, 143, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 75, 143, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* --- Footer Top --- */
.footer-top {
  position: relative;
  z-index: 1;
  padding: var(--sp-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--sp-2xl);
}

/* --- Footer Brand Column --- */
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-lg);
}

.footer-brand .footer-logo img {
  height: 60px;
  width: auto;
  filter: brightness(10) saturate(0);
  opacity: 0.9;
}

.footer-tagline {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: var(--sp-lg);
  max-width: 320px;
}

.footer-certifications {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-lg);
}

.cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
}

.cert-badge i {
  color: var(--clr-accent);
  font-size: 0.7rem;
}

.cert-badge:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

.footer-social {
  display: flex;
  gap: var(--sp-sm);
}

.footer-social-link {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.footer-social-link:hover {
  background: var(--clr-primary-light);
  border-color: var(--clr-primary-light);
  color: #fff;
  transform: translateY(-3px);
}

.footer-social-link.whatsapp:hover {
  background: #25d366;
  border-color: #25d366;
}
.footer-social-link.youtube:hover {
  background: #ff0000;
  border-color: #ff0000;
}
.footer-social-link.facebook:hover {
  background: #1877f2;
  border-color: #1877f2;
}

/* --- Footer Nav Columns --- */
.footer-col-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--sp-lg);
  position: relative;
  padding-bottom: var(--sp-sm);
}

.footer-col-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--clr-accent);
  border-radius: var(--radius-full);
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-link {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.55);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 7px;
}

.footer-nav-link::before {
  content: "";
  display: block;
  width: 5px;
  height: 1px;
  background: var(--clr-accent);
  transition: width var(--transition-base);
  flex-shrink: 0;
}

.footer-nav-link:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-nav-link:hover::before {
  width: 10px;
}

/* --- Footer Contact Column --- */
.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.87rem;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition-fast);
}

.footer-contact-item:hover {
  color: rgba(255, 255, 255, 0.85);
}

.footer-contact-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(10, 75, 143, 0.3);
  border: 1px solid rgba(10, 75, 143, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--clr-primary-light);
  font-size: 0.8rem;
  margin-top: 1px;
}

.footer-contact-detail {
  line-height: 1.5;
}

.footer-contact-detail strong {
  display: block;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 2px;
}

/* --- Footer Bottom --- */
.footer-bottom {
  position: relative;
  z-index: 1;
  padding: var(--sp-lg) 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-md);
  flex-wrap: wrap;
}

.footer-copyright {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.35);
}

.footer-copyright a {
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition-fast);
}

.footer-copyright a:hover {
  color: var(--clr-accent);
}

.footer-legal-links {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}

.footer-legal-link {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.35);
  transition: color var(--transition-fast);
}

.footer-legal-link:hover {
  color: rgba(255, 255, 255, 0.7);
}

.footer-legal-divider {
  width: 1px;
  height: 12px;
  background: rgba(255, 255, 255, 0.15);
}

/* --- Responsive Footer --- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-xl);
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .footer-tagline {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: var(--sp-sm);
  }
  .footer-legal-links {
    justify-content: center;
  }
}