.letras {
    text-transform: uppercase;
    /*text-transform: capitalize;*/
}

.small-box h3 {
    font-size:  calc(1em + 1vw);
}

/* Preload 
#precarga {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #fff;
    z-index: 9999;
  }
  */

*{
    box-sizing: border-box;
}

.fondo-container{
    position: fixed;
    width: 100%;
    height: 100%;
    margin: 0;
    align-items: center;
    background-color: black;
    z-index: 9999;
    opacity: 80%;
}

.loader-container{
    position: relative;
    width: 100px;
    height: 100px;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -50px 50px 50px -50px;
}

.loader-container .loader{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    border: solid 4px transparent;
    border-top-color: teal;
    border-left-color: teal;
    border-radius: 50%;
    animation: loader 1.4s linear infinite;
}

.loader-container .loader2{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 70%;
    height: 70%;
    border: solid 4px transparent;
    border-top-color: aqua;
    border-left-color: aqua;
    border-radius: 50%;
    animation: loader2 1.2s linear infinite;
}

@keyframes loader{
    0%{
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100%{
        transform: translate(-50%, -50%) rotate(360deg);
    }
}
@keyframes loader2{
    0%{
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100%{
        transform: translate(-50%, -50%) rotate(-360deg);
    }
}