img{
    width:100%;
    max-width: 300px;
    max-height: 300px;
    margin-top: 15px;
}

#detail-image{
    width: 100%;
    max-width: 420px;
    max-height: 420px;
    float: left;
    margin: 30px;
}

.grid{
    display: grid;
    width: auto;
    max-width: 80%;
    grid-template-columns: 33.333% 33.333% 33.333%;
    grid-template-rows: 75px auto auto;
    margin-right: auto;
    margin-left: auto;
}

#head-grid{
    grid-column-start: 1;
    grid-column-end: 4;

    background-color: black;
    margin: 0px 20px 20px;
    border-radius: 10px;
    color:white;
    text-align: center;
}

#detail-grid{
    grid-column-start: 1;
    grid-column-end: 4;
    margin-top: 20px;
}

h1{
    margin: 7px;
    letter-spacing: 3px;
}

.grid div{
    text-align: center;
    padding: 5px;
}

#box1, #box2, #box3, #detail-grid{
    border: 2px solid black;
    border-radius: 10px;
    margin-left: 20px;
    margin-right: 20px;
    width: auto;
}

.detail-bttn{
    width: 100%;
    max-width: 230px;
    height: 40px;
    color: rgb(0, 0, 0);
    font-size: 1.4em;
    font-family:'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-weight:300;
    background-color: rgba(255, 255, 255, 0);
    border-radius: 7px;
    border: 2px solid black;
    margin-bottom: 5px;
}

.detail-bttn:hover{
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.7);
}

#productDescription{
    text-align: left;
    margin-right: 10px;
}

#productPrice{
    color: rgb(5, 139, 0);
}

ul{
    text-align: left;
    transform: translateX(11px);
    line-height: 30px;
    font-size: 1.2em;
}

@media screen and (max-width :1000px) {
    .grid{
        display: grid;
        width: auto;
        max-width: 80%;
        grid-template-columns: 1fr;
        grid-template-rows: none;
        margin-right: auto;
        margin-left: auto;
}

.grid div{
    margin-bottom: 20px;
}

#head-grid{
    grid-column-start: 1;
    grid-column-end: 2;
}

#detail-grid{
    grid-column-start: 1;
    grid-column-end: 2;
}

#detail-image{
    float: none;
    margin-right: auto;
    margin-left: auto;
    display: block;
}

}