style.css

.g-col {
    padding: 0 1.5em;
    position:relative;
}
.g-row:after {
    content: "";
    clear: both;
    display: table;
}
@media only screen {.g-col {
    float: left;
    width: 100%;
    box-sizing: border-box;
}}


/* Grid settings for larger than 48em vieports*/

@media only screen and (min-width: 48em) {
    #g-product {
        width: 66.66%;
        left: 33.33%;
    }
    #g-sidebar {
        width: 33.33%;
        right: 66.66%;
    }
}    

/* All remaining css */

#g-container { 
    width: 98%;
    background-color: white;
    font-family: verdana;
    font-size: 16px;
    text-align: justify;        
}

#g-header {
    background-color: white;
    color: black;        
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-around;
    padding: 0.5em;
}    

#g-photo {
    max-width: 60%;
    margin-left: auto;
    margin-right: auto;
    height: auto;
    display: block;
}  

#g-h1 {
    margin:0.5em 0 0 0;
    color: black;
    
}      

#g-content {margin: 0 -1.5em;}

.g-h2 {
    background-color: rgb(245, 245, 245);
    color: black;
    padding: 0.5em 1em;
    border-radius: 10px;
    text-align: center;
    
}           

#g-footer {
    background-color:whitesmoke;        
    padding:0;        
}

.g-menu-item {
    text-decoration: none;
    font-weight: bold;
    text-align: center; 
    color: black;
    padding: 1em;
    display: block;
    border-top: 1px solid rgba(255,255,255,0.2); 
    border-bottom: 1px solid rgba(0,0,0,0.3);     
       
}

.g-menu-item:hover {
    text-decoration: underline;
}

.g-menu-item:last-of-type {border-bottom:none;}

@media only screen and (min-width: 48em) {

    #g-h1 {margin:0 0 0 2em;}

    #g-footer {
        display: flex;
        justify-content: center;
    }

    #g-header {
        flex-direction: row;
        align-items: center;
        justify-content: flex-start;
    }

    .g-menu-item {border: none;}
}