*{
    padding: 0px;
    margin: 0px;
    font-family: 'Open Sans', sans-serif;
}


body {
    background-color: #777777;
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}

h2 {
    text-align: center;
    border-bottom: 2px groove #0096FF;
    padding-bottom: 10px;
    width: 30%;
    margin: 20px auto;
}

h3 {
    text-align: center;
    margin-bottom: 20px;
}

header {
    background-color: #232323;
    width: 100%;
    height: 70px;
}
#menu{
    text-align: center;
    color: #00a9ff;
}

nav {
    text-align: center;
}

nav ul {
    display: block;
}

nav ul li {
    display: inline;

    margin: 0 10px;
}

nav ul li a {
    text-decoration: none;
    color: white;
    font-size: 18px;
    line-height: 70px;
}

nav ul li a:hover {
    color: #0096FF;
}

main {
    flex: 1 0 auto;
}

main section {
    margin: 30px auto;
    width: 650px;
}

main section article {
    display: inline-table;
    margin: 5px;
    width: 300px;
}

main section article .image {
    border: 2px solid #fff;
    height: 270px;
    margin: auto;
    -webkit-transition: 0.6s;
    -moz-transition: 0.6s;
    -o-transition: 0.6s;
    transition: 0.6s;
    width: 270px;
}

main section article .image #hidden_div a {
    text-decoration: none;
}

main section article .image #hidden_div #cuadrado p {
    color: #fff;
    margin: 5px 15px 0px;
    padding: 0;
}

main section article .image #hidden_div #cuadrado i {
    color: rgba(127, 141, 145, 0.36);
}

#hidden_div {
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: 0.6s;
    padding: 1px;
}

#hidden_div:hover {
    background-color: rgba(0, 90, 255, 0.8);
    opacity: 1;
}

#cuadrado {
    background-color: #022291;
    border: 1px solid #000;
    border-radius: 5px;
    height: 30%;
    margin: 25% auto 10% auto;
    outline: 2px solid #fff;
    outline-offset: -8px;
    text-align: center;
    width: 75%;
}

#imagen1 {
    background: url("../imagenes/php.png");
    background-size: 100% 100%;
}

#imagen2 {
    background: url("../imagenes/javascript.png");
    background-size: 100% 100%;
}

#imagen3 {
    background: url("../imagenes/design.png");
    background-size: 100% 100%;
}

#imagen4 {
    background: url("../imagenes/android.png");
    background-size: 100% 100%;
}

#verCodigo {
    background-color: #0096FF;
    border: 2px solid #022291;
    width: 10%;
    margin: 50px auto;
}

#verCodigo a {
    color: white;
    text-decoration: none;
}

footer {
    background: #262626;
    height: auto;
    text-align: center;
}

footer p {
    color: #fff;
    margin: 0 5px 5px;
    padding-top: 20px;
}

footer #iconos {
    margin: auto;
    text-align: center;
}

footer #iconos a {
    color: #fff;
    margin: 0px 5px;
    opacity: 0.2;
    text-decoration: none;
}

footer #iconos #twitter:hover {
    color: #04a6db;
    opacity: 1;
}

footer #iconos #facebook:hover {
    color: #02309b;
    opacity: 1;
}

footer #iconos #github:hover {
    color: #9f00ff;
    opacity: 1;
}

#practicas {
    width: 100%;
    display: flex;
    justify-content: center;
}

#practicas h3,
#practicas ul {
    width: 100%;
    text-align: center;
}

#practicas h3 {
    color: #00a9ff;
    font-size: 23px;

}

#practicas ul {
    list-style: none;
    font-size: 17px;
    text-align: center;
    padding: 0px;
}

#practicas ul li a {
    text-decoration: none;
    color: #fff;
}

#practicas ul li a:hover {
    text-decoration: underline;
    color: #fff;
}

#caja{
    float:left;
    margin-left:5px;
}

.barra{
    padding: 5px;
    border-right: 1px solid;
}