.modal{
    display: none;
}

.modal:target{
    display: block;
    position: fixed;
    background: rgba(0,0,0,.9);
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.modal h3 {
    color: #fff;
    font-size: 25px;
    text-align: center;
    margin: 15px 0;
    
}

.imagen {
    width: 100%;
    height: 50%;
    
    display: flex;
    justify-content: center;
    align-items: center;
}

.imagen a {
    color: #fff;
    font-size: 25px;
    text-decoration: none;
    margin: 0 10px;
}

.imagen a:nth-child(2){
    margin: 0;
    height: 100%;
    flex-shrink: 2;
}

.imagen img{
    width: 500px;
    height: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.cerrar{
    display: block;
    background: #fff;
    font-family:'Comfortaa', cursive;
    width: 25px;
    height: 25px;
    margin: 15px auto;
    text-align: center;
    text-decoration: none;
    font-size: 25px;
    color: #000;
    padding: 5px;
    border-radius: 50%;
    line-height: 25px;
}