Botón Moderno con Gradiente

.modern-btn {
  position: relative;
  padding: 16px 32px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  border-radius: 50px;
  color: white;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.modern-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.modern-btn:active {
  transform: translateY(0);
}

.modern-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.modern-btn:hover::before {
  left: 100%;
}

.btn-icon {
  transition: transform 0.3s ease;
}

.modern-btn:hover .btn-icon {
  transform: translateX(4px);
}