/**
 * Footer Component — Premium
 *
 * @package Stratos_One_Portfolio
 */

/* ============================================
   Site Footer
   ============================================ */
.site-footer {
  background-color: var(--color-bg-primary);
  border-top: 1px solid var(--color-border-subtle);
  padding: var(--spacing-xl) 0;
  position: relative;
  z-index: 10;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xl);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Left: Copyright */
.footer-left {
  flex: 1;
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin: 0;
  line-height: var(--line-height-relaxed);
}

/* Center: Social Links */
.footer-social {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-social-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.social-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.social-link:hover {
  border-color: var(--color-border-accent);
  background-color: var(--color-accent-subtle);
  transform: translateY(-2px);
}

.social-link svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-text-secondary);
  transition: stroke var(--transition-fast);
}

.social-link:hover svg {
  stroke: var(--color-accent-primary);
}

/* Right: Footer Menu */
.footer-menu {
  flex: 1;
}

.footer-menu ul {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-lg);
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-menu a {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-menu a:hover {
  color: var(--color-accent-primary);
}

/* ============================================
   Back to Top Button (Floating)
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background-color: var(--color-accent-primary);
  border: none;
  border-radius: var(--radius-full);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 9999;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
  padding: 0;
}

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

.back-to-top:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.5);
}

.back-to-top:active {
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  flex-shrink: 0;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-lg);
  }
  
  .footer-left,
  .footer-menu {
    width: 100%;
  }
  
  .footer-menu ul {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .footer-social {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
  
  .back-to-top svg {
    width: 18px;
    height: 18px;
  }
}

@media (max-width: 600px) {
  .site-footer {
    padding: var(--spacing-lg) 0;
  }
  
  .footer-social-label {
    display: none;
  }
  
  .footer-menu {
    display: none;
  }
  
  .footer-copyright {
    font-size: 11px;
  }
}