estilos.css

*{
    margin: 0;
    padding: 0;
}

.caja1{
    width: 100%;
    height: 100%;
    background-color: gold;
    max-width: 1300px;
    margin: auto;
    display: flex;
    flex-flow: row wrap;
}

header{
    width: 100%;
    background-color: gold;
    display: flex;
    overflow: hidden;
    
}

header div img{
    width: 100%;
    margin: auto;
    align-content: center;
}
nav {
    margin: 5px;
    width: 100%;
    display: flex;
    background-color: cornflowerblue;
    color: white;
    
}

nav span{
    margin-right: 10px;
}

nav a{
    color: white;
    text-decoration: none;
    text-align: center;
    margin-right: 5px;
    flex-grow: 1;
    padding: 20px;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 20px;
}

nav a:hover{
    background-color: bisque;
}



.principal
{
    background-color: azure;
    margin: 5px;
    display: flex;
    flex-direction: column;
    flex: 1 1 65%;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 18px;
    text-align: justify;
 }
.principal article{
    margin-left: 20px;
    margin-right: 20px;
    margin-top: 50px;
    margin-bottom: 50px;
}

.principal article #carro{
    display: block;
    margin: auto;
    align-content: center;
}

.principal article .titulo{
    margin-top: 30px;
}

.principal article .parrafos{
    margin-top: 10px;
    margin-bottom: 10px;
}

aside
{
    flex: 1 1 7%;
    display: flex;
    flex-wrap: wrap;
    flex-direction: column;
    justify-content: flex-start;
    margin: 5px;
    background-color:darkblue;
    color: white;
    padding: 20px;
}

aside p{
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 18px;
    text-align: justify;
    margin: 10px;
}
footer{
    margin: 5px;
    text-align:right;
    width: 100%;
    background-color: #555;
    flex-wrap: wrap;
    color: white;
    justify-content: space-between;
    text-align: center;
}

footer p{
    margin: 10px;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 16px;
    text-align: center;
}
footer .social{
    background-color: #555;
}

footer .social a{
    padding: 15px;
    display: inline-block;
    color: white;
    text-decoration: none;
}

article .repuestos{
    width: 20%;
    height: 20%;
    float: left;
    margin-left: 5%;
    margin-top: 10%;
}

@media screen and (max-width:800px){
    .caja1{
        flex-direction: column;
    }
    
    header{
        flex-direction: column;
    }
    
    aside p{
        flex-direction: column;
        text-align: center;
        font-size: 1em;
    }
    
    aside .widget{
        flex-grow: 1;
    }
}

@media screen and (max-width: 600px){
    
    header{
        flex-direction: column;
    }
    
    nav {
        flex-direction: column;
    }
    aside{
        flex-direction: column;
    }
    
    footer{
        justify-content: space-around;
    }
}