akqa-cart-exercise/css/style.css

html {
    background-image:  -webkit-gradient(
        linear,
        left top,
        left bottom,
        color-stop(0, #FFFFFF),
        color-stop(1, #DADADA)
    );
    background-image:  -o-linear-gradient(bottom, #FFFFFF 0%, #DADADA 100%);
    background-image:  -moz-linear-gradient(bottom, #FFFFFF 0%, #DADADA 100%);
    background-image:  -webkit-linear-gradient(bottom, #FFFFFF 0%, #DADADA 100%);
    background-image:  -ms-linear-gradient(bottom, #FFFFFF 0%, #DADADA 100%);
    background-image:  linear-gradient(to bottom, #FFFFFF 0%, #DADADA 100%);
}
body {
    margin: 0;
    padding: 0;
}

#content {
    font-family: 'Droid Serif', serif;
    margin: 0 auto;
    width: 580px;
}

#logo {
    background-image: url(../assets/logo.png);
    font-size: 0;
    height: 48px;
    margin: 130px 0 0 21px;
    width: 100px;
}

#content h1 {
    font-size: 31px;
    font-weight: 700;
    letter-spacing: -2px;
    margin: 67px 0 0 21px;
}

#content p {
    font-size: 14px;
    margin: 12px 0 0 22px;
}

#cart form input {
    display: inline-block;
    font-size: 14px;
    height: 22px;
    text-align: center;
    width: 31px;
}

#headings {
    border-bottom: 2px solid;
    float: left;
    margin: 60px 0 0;
    width: 510px;
}

#headings .header {
    float: left;
    font-size: 18px;
    font-weight: 700;
    padding: 0 0 0 19px;
}

#headings .header.product {
    width: 238px;
}

#headings .header.price {
    text-align: right;
    width: 60px;
}

#headings .header.quantity {
    text-align: center;
    width: 70px;
}

#headings .header.cost {
    text-align: right;
    width: 50px;
}

#items {
    float: left;
    margin: 27px 0 0;
    width: 550px;
}

#items .item {
    clear: left;
    float: left;
    font-size: 18px;
    padding: 13px 10px 9px 0;
}

#items .item: hover {
    background-color: #ddd;
}

#items .item .product,
#items .item .price,
#items .item .quantity,
#items .item .cost,
#items .item .remove {
    float: left;
    margin-left: 20px;
}

#cart-totals {
    color: #666;
    float: left;
    margin: 27px 0 0;
    width: 498px;
}

#items .item .product {
    display: block;
    width: 235px;
}

#items .item .price {
    text-align: right;
    width: 63px;
}

#items .item .quantity {
    margin-top: -4px;
    padding: 0;
    width: 79px;
}

#items .item .quantity input {
    border: 1px #999 solid;
    float: left;
    height: 28px;
    padding-right: 4px;
    text-align: right;
    width: 34px;
}

#items .item .quantity .qty-ctrl {
    float: left;
    font-size: 0;
    margin-left: 4px;
    width: 17px;
}

#items .item .quantity .qty-ctrl .qty-up {
    background-color: #999;
    border: 0;
    color: #FFF;
    height: 15px;
    margin-bottom: 2px;
    padding: 0;
    width: 16px;
}

#items .item .quantity .qty-ctrl .qty-up span {
    font-size: 11px;
    position: relative;
    top: -1px;
}

#items .item .quantity .qty-ctrl .qty-down {
    background-color: #999;
    border: 0;
    color: #FFF;
    height: 15px;
    padding: 0;
    width: 16px;
}

#items .item .quantity .qty-ctrl .qty-down span {
    clear: left;
    font-size: 11px;
    position: relative;
    top: -1px;
}

#items .item .cost {
    width: 53px;
}

#items .item .remove {
    background-color: transparent;
    background-image: url(../assets/trash.png);
    background-position: 1px 1px;
    background-repeat: no-repeat;
    border: 0;
    height: 24px;
    margin-left: 10px;
    padding: 0;
    width: 18px;
}

#cart-totals > div {
    clear: both;
    float: left;
    width: 498px;
}

#cart-totals .heading {
    float: left;
    padding: 0 0 7px 22px;
    width: 380px;
}

#cart-totals .amount {
    float: left;
    text-align: right;
    width: 80px;
}

#cart-totals #total {
    color: #000;
    font-weight: 700;
    padding: 20px 0 0;
}

#buynow {
    clear: both;
    float: left;
    margin: 47px 0 178px;
    width: 479px;
}

#buy-btn {
    background-color: #000065;
    border: 0 none;
    color: #fff;
    float: right;
    font-size: 23px;
    font-weight: 700;
    height: 50px;
    padding: 10px 0 10px 5px;
    text-align: left;
    text-decoration: none;
    width: 130px;
    border-radius: 10px;
}

#buy-btn: disabled {
    background-color: #ccc;
    color: #333;
}

#footer {
    background-color: #666;
    border-top: 1px solid #000;
    clear: both;
    color: #fff;
    font-size: 11px;
    margin: 10px 0 0;
    padding: 14px 0;
    text-align: center;
    width: 100%;
}

@media all and max-width 699px and min-width 520px{
    #logo {
        margin: 70px 0 0;
    }
}

@media all and max-width 520px and min-width 320px{
    #logo {
        margin: 50px 0 0;
    }

    #content h1 {
        margin: 25px 0 0 21px;
    }

    #headings {
        margin: 30px 0 0;
        width: 100%;
    }

    #headings .header {
        font-size: 14px;
    }

    #items {
        width: 110%;
    }

    #items .item {
        font-size: 12px;
        padding: 0 0 13px 19px;
    }

    #headings .header.product {
        width: 39%;
    }

    #headings .header.price,
    #items .item.price {
        width: 10%;
    }

    #items .item.product,
    #items .item.product {
        width: 34%;
    }

    #items .item.cost {
        width: 8%;
    }

    #cart-totals,
    #cart-totals > div,
    #buynow {
        width: 100%;
    }

    #cart-totals .heading {
        width: 50%;
    }

    #cart-totals .amount {
        width: 40%;
    }

    #headings .header.quantity,
    #items .item.quantity,
    #headings .header.cost {
        width: 15%;
    }
}

@media all and max-width 320px and min-width 120px{
    #headings .header.product {
        width: 32%;
    }

    #headings .header.quantity,
    #items .item.quantity {
        width: 16%;
    }

    #items .item.cost {
        width: 5%;
    }

    #items .item.remove a {
        font-size: 12px;
    }

    #items > div {
        height: 46px;
    }
}