/* ===================================
   FOOTER MEJORADO Y SIMPLIFICADO
   =================================== */

/* ===== FOOTER PRINCIPAL ===== */
.main-footer {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  padding: var(--space-12) 0 var(--space-4) 0;
  border-top: 3px solid var(--primary-green);
  position: relative;
  overflow: hidden;
}

.main-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 25% 25%, rgba(16, 185, 129, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(16, 185, 129, 0.03) 0%, transparent 50%);
  pointer-events: none;
}

/* ===== GRID DEL FOOTER ===== */
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--space-4);
}

@media (max-width: 1024px) {
  .footer-grid {
    padding: 0 var(--space-3);
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

/* ===== INFORMACIÓN PRINCIPAL ===== */
.footer-info {
  max-width: 400px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer-brand i {
  color: var(--primary-green);
  font-size: 2.2rem;
  filter: drop-shadow(0 2px 4px rgba(16, 185, 129, 0.3));
}

.footer-brand h3 {
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin: 0;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.footer-description {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-5);
  font-size: var(--font-size-base);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  transition: var(--transition);
  padding: var(--space-2);
  border-radius: 8px;
}

.contact-item:hover {
  color: var(--primary-green);
  background: rgba(16, 185, 129, 0.05);
  transform: translateX(5px);
}

.contact-item i {
  color: var(--primary-green);
  width: 18px;
  text-align: center;
  font-size: 1rem;
}

/* ===== ENLACES RÁPIDOS ===== */
.footer-links h4 {
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  position: relative;
  padding-bottom: var(--space-2);
}

.footer-links h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary-green);
  border-radius: 2px;
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: var(--transition);
  padding: var(--space-1) var(--space-2);
  border-radius: 4px;
  display: inline-block;
}

.footer-links a:hover {
  color: var(--primary-green);
  background: rgba(16, 185, 129, 0.05);
  transform: translateX(3px);
}

/* ===== TECNOLOGÍAS ===== */
.footer-tech h4 {
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  position: relative;
  padding-bottom: var(--space-2);
}

.footer-tech h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary-green);
  border-radius: 2px;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-tag {
  background: var(--bg-primary);
  color: var(--text-secondary);
  padding: var(--space-1) var(--space-3);
  border-radius: 20px;
  font-size: var(--font-size-xs);
  font-weight: 500;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: default;
}

.tech-tag:hover {
  background: var(--primary-green);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

/* ===== REDES SOCIALES ===== */
.footer-social h4 {
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  position: relative;
  padding-bottom: var(--space-2);
}

.footer-social h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary-green);
  border-radius: 2px;
}

.footer-social .social-links {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.footer-social .social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 1.2rem;
  position: relative;
  overflow: hidden;
}

.footer-social .social-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.footer-social .social-link:hover {
  background: var(--primary-green);
  color: white;
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
  border-color: var(--primary-green);
}

.footer-social .social-link:hover::before {
  left: 100%;
}

/* ===== PARTE INFERIOR DEL FOOTER ===== */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: var(--space-4);
  position: relative;
  z-index: 1;
}

.footer-copyright p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.footer-credits {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 55px;
  height: 55px;
  background: linear-gradient(135deg, var(--primary-green), #0d9488);
  color: white;
  border: none;
  border-radius: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  transform: translateY(100px) scale(0.8);
  z-index: 1000;
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.3);
}

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

.back-to-top:hover {
  background: linear-gradient(135deg, #0d9488, var(--primary-green));
  transform: translateY(-8px) scale(1.1);
  box-shadow: 0 12px 30px rgba(16, 185, 129, 0.5);
}

.back-to-top:active {
  transform: translateY(-4px) scale(1.05);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
  
  .footer-info {
    grid-column: 1 / -1;
    max-width: 100%;
    text-align: center;
    margin-bottom: var(--space-4);
  }
  
  .footer-contact {
    align-items: center;
  }
}

@media (max-width: 768px) {
  .main-footer {
    padding: var(--space-10) 0 var(--space-5) 0;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }
  
  .footer-info {
    grid-column: 1;
  }
  
  .footer-info p {
    font-size: var(--font-size-base);
    line-height: 1.6;
    max-width: 100%;
  }
  
  .footer-links {
    padding: var(--space-4) 0;
  }
  
  .footer-links h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-4);
  }
  
  .footer-links ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
  }
  
  .footer-links li a {
    font-size: var(--font-size-base);
    padding: var(--space-2);
  }
  
  .tech-tags {
    justify-content: center;
    gap: var(--space-2);
  }
  
  .tech-tag {
    font-size: var(--font-size-sm);
    padding: var(--space-2) var(--space-3);
  }
  
  .footer-social {
    padding: var(--space-4) 0;
  }
  
  .footer-social h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-4);
  }
  
  .footer-social .social-links {
    justify-content: center;
    gap: var(--space-3);
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-4);
    padding-top: var(--space-6);
    margin-top: var(--space-6);
  }
  
  .footer-copyright p {
    font-size: var(--font-size-sm);
  }
  
  .footer-credits {
    font-size: var(--font-size-sm);
  }
  
  .back-to-top {
    bottom: var(--space-4);
    right: var(--space-4);
    width: 50px;
    height: 50px;
  }
}

@media (max-width: 480px) {
  .main-footer {
    padding: var(--space-8) 0 var(--space-4) 0;
  }
  
  .footer-grid {
    gap: var(--space-6);
  }
  
  .footer-brand {
    flex-direction: column;
    gap: var(--space-3);
    align-items: center;
  }
  
  .footer-brand i {
    font-size: 2.5rem;
  }
  
  .footer-brand h3 {
    font-size: var(--font-size-xl);
  }
  
  .footer-info p {
    font-size: var(--font-size-sm);
    padding: 0 var(--space-2);
  }
  
  .footer-links {
    padding: var(--space-3) 0;
  }
  
  .footer-links h4 {
    font-size: var(--font-size-base);
  }
  
  .footer-links ul {
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
  }
  
  .footer-links li a {
    font-size: var(--font-size-sm);
    display: block;
    padding: var(--space-2) var(--space-4);
  }
  
  .tech-tags {
    gap: var(--space-2);
    padding: 0 var(--space-2);
  }
  
  .tech-tag {
    font-size: 0.7rem;
    padding: var(--space-1) var(--space-2);
  }
  
  .footer-social {
    padding: var(--space-3) 0;
  }
  
  .footer-social h4 {
    font-size: var(--font-size-base);
  }
  
  .footer-social .social-links {
    gap: var(--space-2);
  }
  
  .social-link {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-base);
  }
  
  .footer-bottom {
    gap: var(--space-3);
    padding-top: var(--space-4);
    margin-top: var(--space-4);
  }
  
  .footer-copyright p,
  .footer-credits {
    font-size: 0.75rem;
    padding: 0 var(--space-2);
  }
  
  .back-to-top {
    bottom: var(--space-3);
    right: var(--space-3);
    width: 45px;
    height: 45px;
    font-size: var(--font-size-base);
  }
}

/* ===== ANIMACIONES ADICIONALES ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.footer-grid > div {
  animation: fadeInUp 0.6s ease-out;
}

.footer-grid > div:nth-child(2) {
  animation-delay: 0.1s;
}

.footer-grid > div:nth-child(3) {
  animation-delay: 0.2s;
}

.footer-grid > div:nth-child(4) {
  animation-delay: 0.3s;
}