/** Footer Component - Grid 4 columnas horizontal */
.footer {
  padding: var(--space-8) 0 var(--space-6);
  background-color: var(--bg-secondary);
  border-top: var(--border-width) solid var(--border-primary);
  margin-top: auto;
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Grid de 4 columnas HORIZONTALES (1 fila x 4 columnas) */
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: 1fr; /* Forzar 1 sola fila */
  gap: var(--space-8);
  margin-bottom: var(--space-6);
  align-items: start; /* Alinear al inicio */
}

/* Secciones del footer */
.footer-section {
  min-width: 0; /* Evita overflow */
}

.footer-section-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--space-4);
}

/* Enlaces del footer */
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links li {
  margin: 0;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* Redes sociales - Horizontal */
.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.footer-social .social-link {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  background-color: transparent;
}

.footer-social .social-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
}

.footer-social svg {
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer-social .social-link:hover svg {
  opacity: 1;
}

/* Theme toggle en footer */
.theme-toggle-footer {
  background: transparent;
  border: var(--border-width) solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}

.theme-toggle-footer:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--border-secondary);
  color: var(--text-primary);
}

.theme-icon {
  font-size: 18px;
  line-height: 1;
}

/* Copyright */
.footer-bottom {
  text-align: right; /* Alinear a la derecha para mejor balance */
  padding-top: var(--space-4);
  border-top: var(--border-width) solid var(--border-primary);
  color: var(--text-tertiary);
  font-size: var(--text-sm);
}

.footer-bottom p {
  margin: 0;
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */

/* Tablet: 2x2 grid */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto; /* Permitir múltiples filas en tablet */
    gap: var(--space-6) var(--space-8);
  }
}

/* Mobile: 1 columna vertical */
@media (max-width: 640px) {
  .footer {
    padding: var(--space-6) 0 var(--space-4);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto; /* Múltiples filas en mobile */
    gap: var(--space-6);
  }

  .footer-section {
    text-align: center;
  }

  .footer-links {
    align-items: center;
  }

  .footer-social {
    justify-content: center;
  }

  .footer-bottom {
    padding-top: var(--space-3);
    margin-top: var(--space-3);
    text-align: center; /* Centrar en mobile */
  }
}