*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family:Arial, Helvetica, sans-serif;
    background:#f5f5f5;
}

header{

    background:#1e3a8a;
    color:white;

    padding:20px 40px;

    display:flex;
    justify-content:space-between;
    align-items:center;

}

.logo{

    font-size:1.5rem;
    font-weight:bold;

}

nav{

    display:flex;
    gap:20px;

}

nav a{

    color:white;
    text-decoration:none;

}

.banner img{

    width:100%;
    display:block;

}

main{

    max-width:1400px;

    margin:20px auto;

    display:grid;

    grid-template-columns:
    280px 1fr;

    gap:20px;

}

aside{

    background:#dbeafe;

    padding:20px;

    min-height:600px;

}

aside ul{

    margin-top:20px;
    padding-left:20px;

}

.produtos{

    display:grid;

    grid-template-columns:
    repeat(auto-fit,minmax(250px,1fr));

    gap:20px;

}

.produtos article{

    background:white;

    min-height:250px;

    border:1px solid #ddd;

    display:flex;
    justify-content:center;
    align-items:center;

    font-weight:bold;

    border-radius:10px;

}

footer{

    background:#1e3a8a;
    color:white;

    text-align:center;

    padding:30px;

}

@media(max-width:900px){

    main{

        grid-template-columns:1fr;

    }

    header{

        flex-direction:column;
        gap:15px;

    }

}