article {
    display: grid;
}
.container {
    margin: 0px auto 30px;
    color: #444;
    border-width: 1px;
    border-style: solid;
    padding: 30px;
}
@media only screen and (min-width: 900px) {
    .container {
        width: 500px;
    }
    #contents {
        width: 600px
    }

    main {
        display: grid;
        grid-template-columns: 600px 500px;
        margin: 0px auto;
        width: 1100px
    }

    #sidebar {
        width: 400px;
    }
}


@media only screen and (min-width: 600px) and (max-width: 900px) {
    .container {
        width: 500px;
    }
    #contents {
        width: 600px
    }
    #sidebar {
        width: 500px;
        margin-left: 20px
    }
}

@media only screen and (max-width: 600px) {
    .container {
        width: 400px;
    }

    #sidebar {
        width: 400px;
        margin: auto;
    }
}

body {margin: 0;padding:0;
    font-family: Helvetica,Arial,sans-serif;}
.title {
    font-size: 20pt;
    line-height: 20pt;
}
.titleu {
    box-shadow: inset 0 -5px 0 #ffff79;
}
.date{
    color: #b78fff;
    font-weight: lighter;
}
.subtitle {
    font-size: 14pt;
    color: grey;
    font-weight: lighter;
}
#sidebar {
    border-width: 1px;
    border-color: black;
    border-style: solid;
    padding: 30px;
}
main {
    margin-top: 30px
}

#main-title {
    font-family: Helvetica, Arial, sans-serif;
    margin: 30px auto 40px ;
    width: 400px;
    text-align: center;
}

.titlet {
    box-shadow: inset 0 -10px 0 #ffff79;
    font-size: 36pt;
}

#shop-items {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 5px;
    font-size: 10pt;
}

#subt {
    font-size: 18pt;
    font-weight: lighter;
}

img {
    width: inherit
}