* {
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
    font-style: normal;
    margin: 0
}

header {
    display: flex;
    padding: 10px;
    background-color: cornflowerblue;
    color: snow;
    box-shadow: 0rem .25rem .25rem silver;
    align-items: center;
    align-content: space-around;
    flex-grow: 1;
    justify-content: space-between;
    width: auto
}

header h1 {
    font-size: 20px;
    justify-content: center;
}

header img {
    height: 20px;
}


.tab p {
    color: dimgrey;
    text-align: center;
    font-size: 13px
}

.tab {
    display: flex;
    flex-wrap: nowrap;
    flex-direction: column;
    color: black;
    justify-content: space-around;
}

.tab h4 {
    text-align: center;
    margin: 10px;
    text-shadow: 0rem .10rem .10rem white;
    font-size: 18px;
}

.tab div {
    height: 250px;
    width: auto;
    align-items: center;
    justify-content: center;
    display: flex;
    flex-direction: column;
    margin-top: 5px;
    box-shadow: 0rem .15rem .15rem silver;
}

.acero_argentino {
    background-image: url("acero_argentino.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

.arte_industria {
    background-image: url("arte_en_la_industria.jpg");
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
}

.industria_argentina {
    background-image: url("industria_argentina.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

.industria_ferroviaria {
    background-image: url("industria_ferroviaria.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

footer {
    font-size: 10px
}