Colección de Spinners de Carga Animados

                .spinner-showcase {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.spinner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  max-width: 800px;
  width: 100%;
}

.spinner-item {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.spinner-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.spinner {
  width: 40px;
  height: 40px;
}

.spinner-label {
  color: white;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
}

/* Spinner Clásico */
.classic-spinner {
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid #fff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Spinner Pulso */
.pulse-spinner {
  background: #fff;
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.2);
    opacity: 1;
  }
}

/* Spinner Puntos */
.dots-spinner {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
}

.dot {
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
  animation: dotBounce 1.4s ease-in-out infinite both;
}

.dot:nth-child(1) { animation-delay: -0.32s; }
.dot:nth-child(2) { animation-delay: -0.16s; }
.dot:nth-child(3) { animation-delay: 0s; }

@keyframes dotBounce {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Spinner Anillo */
.ring-spinner {
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top: 4px solid transparent;
  border-right: 4px solid transparent;
  animation: ring 1s linear infinite;
}

.ring-spinner::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  right: 2px;
  bottom: 2px;
  border: 2px solid transparent;
  border-top: 2px solid #fff;
  border-radius: 50%;
  animation: ring 1.5s linear infinite reverse;
}

@keyframes ring {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Spinner Gradiente */
.gradient-spinner {
  background: conic-gradient(from 0deg, transparent, #fff, transparent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  position: relative;
}

.gradient-spinner::before {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  right: 4px;
  bottom: 4px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 50%;
}

/* Spinner Rebote */
.bounce-spinner {
  display: flex;
  gap: 4px;
  align-items: center;
  justify-content: center;
}

.bounce-ball {
  width: 10px;
  height: 10px;
  background: #fff;
  border-radius: 50%;
  animation: bounce 1.4s ease-in-out infinite both;
}

.bounce-ball:nth-child(1) { animation-delay: -0.32s; }
.bounce-ball:nth-child(2) { animation-delay: -0.16s; }
.bounce-ball:nth-child(3) { animation-delay: 0s; }

@keyframes bounce {
  0%, 80%, 100% {
    transform: translateY(0) scale(0.8);
    opacity: 0.7;
  }
  40% {
    transform: translateY(-20px) scale(1);
    opacity: 1;
  }
}

/* Diseño Responsivo */
@media (max-width: 768px) {
  .spinner-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  
  .spinner-item {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .spinner-grid {
    grid-template-columns: 1fr;
  }
}

              

                // Opcional: Control dinámico de spinners
class ControladorSpinner {
  constructor() {
    this.spinnersActivos = new Set();
    this.init();
  }
  
  init() {
    // Agregar manejadores de clic para demostración
    document.querySelectorAll('.spinner-item').forEach((item, index) => {
      item.addEventListener('click', () => {
        this.alternarSpinner(item, index);
      });
    });
  }
  
  alternarSpinner(item, index) {
    const spinner = item.querySelector('.spinner');
    const label = item.querySelector('.spinner-label');
    
    if (this.spinnersActivos.has(index)) {
      // Detener spinner
      spinner.style.animationPlayState = 'paused';
      label.textContent = label.textContent.replace(' (Pausado)', '') + ' (Pausado)';
      this.spinnersActivos.delete(index);
    } else {
      // Iniciar spinner
      spinner.style.animationPlayState = 'running';
      label.textContent = label.textContent.replace(' (Pausado)', '');
      this.spinnersActivos.add(index);
    }
  }
  
  // Métodos de utilidad
  pausarTodos() {
    document.querySelectorAll('.spinner').forEach(spinner => {
      spinner.style.animationPlayState = 'paused';
    });
  }
  
  reanudarTodos() {
    document.querySelectorAll('.spinner').forEach(spinner => {
      spinner.style.animationPlayState = 'running';
    });
  }
}

// Inicializar controlador de spinner
document.addEventListener('DOMContentLoaded', () => {
  new ControladorSpinner();
});