* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  font-family: 'Segoe UI', Roboto, sans-serif;
}

.contenedor {
  text-align: center;
}

.boton-principal {
  display: inline-block;
  padding: 18px 50px;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  color: #ffffff;
  font-size: 22px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
  transition: all 0.3s ease;
  letter-spacing: 0.5px;
}

.boton-principal:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(59, 130, 246, 0.45);
  background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
}

.boton-principal:active {
  transform: translateY(0);
}