:root {
    --color-fuente: #000000;
    --color-fondo: #ffffff;
}
[tema="light"]{
    --color-fuente: #000;
    --color-fondo: #fff;
}
[tema="dark"]{
    --color-fuente: #fff ;
    --color-fondo: #212529;
}
body {
    background-color:var(--color-fondo);
    
}
h3{
   color:var(--color-fuente);
}
#n1{
    color:var(--color-fuente);
}
#n2{
  color:var(--color-fuente) !important;
}

/* The switch - the box around the slider */
.switch {
    position: relative;
    display: inline-block;
    width: 56px;
    height: 25px;
  }
  
  /* Hide default HTML checkbox */
  .switch input {
    opacity: 0;
    width: 0;
    height: 0;
  }
  
  /* The slider */
  .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .4s;
    transition: .4s;
  }
  
  .slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 6px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
  }
  
  input:checked + .slider {
    background-color: #2196F3;
  }
  
  input:focus + .slider {
    box-shadow: 0 0 1px #2196F3;
  }
  
  input:checked + .slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
  }
  
  /* Rounded sliders */
  .slider.round {
    border-radius: 34px;
  }
  
  .slider.round:before {
    border-radius: 50%;
  }