*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0)!important;
}
.center {
    display: flex;
    justify-content: center;
    align-items: center;
}
body {
    color: rgba(255, 255, 255, 1);
    background: rgba(0, 0, 0, 1);
    width: 100%;
    flex-wrap: wrap;
}
/* >>>>> -->>>>> ----- header ----- <<<<<-- <<<<< */
.header {
    width: 100%;
}
.cont__header{
    width: 100%;
    text-align: center;
    padding: 2%;
    font-size: 1.2em;
    border-bottom: 3px solid red;
    display: flex;
    justify-content: center;
    align-items: center;
}
.title__header {
    width: 70%;
    text-align: left;
    padding-left: 5%;
}
.logo__header {
    width: 30%;
    max-width: 150px;
}
.cont__header span {
    font-size: .7em;
}
/* >>>>> -->>>>> -----  ----- <<<<<-- <<<<< */
.cont__demostracion{
    width: 100%;
}
/* >>>>> -->>>>> ----- instrucciones ----- <<<<<-- <<<<< */
.acercaDe{
    width: 100%;
    background: rgba(255,255,255,.9);
    padding: 2%;
}
.article__acercaDe{
    width: 100%;
    max-width: 1000px;
    background: rgba(0,0,0,.5);
    padding: 5px;
    border-radius: 5px;
    margin: auto;
    margin-bottom: 55px;
}
.title__acercaDe{
    text-decoration:underline;
    color: rgba(255,255,255,1);
    font-size: 1.3em;
    margin-bottom: 15px;
}
.parrafo__acercaDe{
    padding: 5px 15px;
    color: rgba(255,255,255,.7);
    text-align: justify;
}
.title__instrucciones{
    color: #000;
    font-size: 1.3em;
    margin-bottom: 15px;
}
pre{
    width: 100%;
    background:blue;
    overflow-x: scroll;
}
code div{
    display: block;
    width: 100%;
    background: rgba(0,0,0,1);
    padding: 2px 5px;
}
.observaciones{
    width: 100%;
}
.title__observaciones{
    color: rgba(255,255,255,.8);
    padding: 5px;
    margin-top: 10px;
}
.observaciones div{
    overflow-X: scroll;
}
/* >>>>> -->>>>> ----- botones ----- <<<<<-- <<<<< */
.cont__btn{
    width: 100%;
}
.btn{
    width: 45%;
    border: solid 2px skyblue;
    margin: auto;
    padding: 10px 0;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
}
.btn:hover{
    background: skyblue;
}
.text__btn{
    color: #fff;  
}
/* >>>>> -->>>>> ----- footer ----- <<<<<-- <<<<< */
.footer{
    width: 90%;
    height: 50px;
    margin: auto;
    margin-top: 20px;
}
.footer i{
    color: red;
}
/*------------------------------------------------------------*/
@media (min-width: 600px) {
    body {
        align-items: flex-start!important;
        flex-direction: row-reverse;
    }
    .cont__header{
        justify-content: space-around;
    }
    .cont__demostracion,
    .acercaDe {
        width: 49%;
    }
}