/*------------------te amo------------------*/
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    overflow: hidden;
    height: 100vh;
    background: black;
    background-image: url(../img/hearts-37308_960_720.png);
    transition: all 0.2s;
}
@keyframes fondo {
    0% {
        background-color: black;
        background-position: bottom left -100%;
    }
    50% {
        background-color: red;
        background-position: top right 100%;
    }
    100%{
        background-color: black;
        background-position: bottom left -100%;
    }
}
.contenedor_letras {
    width: 100%;
    height: 90vh;
    
    display: flex;
    justify-content: center;
    align-items: center; 

    position: relative;
}
.letra {
    position: relative;
    background-color: rgba(255,255,255,0.3);
                
    width: 50px;
    height: 50px;
                
    font-size: 3em;
    color: white;
                
    display: flex;
    justify-content: center;
    align-items: center;
}
.tapa {
    width: 100%;
    height: 100%;
    background-color: black;
    position: absolute;
    transform-origin: bottom left;
}

@keyframes ver {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(90deg);
        opacity: 0;
    }
}
.beso {
    width: 300px;
    position:fixed;
    transform: translateY(50%);
    filter: brightness(0);
    opacity: 0;
}
.beso img {
    width: 100%;
}
@keyframes beso {
    0% {
        width: 0;
        opacity: 0;
        transform: translateY(-300%);
    }
    95% {
        opacity: 1;
        width: 300px;
        transform: translateY(50%);
        
    }
    100% {
        opacity: 1;
    }
}
@media (min-width: 756px) {
    .letra {
        width: 100px;
        height: 100px;
        
        font-size: 6rem;
    }
    .letra:before {
        content: "";
        width: 100px;
        height: 100px;
    }
}