html {
    font-family: sans-serif;
}
a {
    color: #00F;
}
h1 {
    margin-bottom: 3rem;
}
.clearfix::after {
    content: "";
    display: table; /* creates a new block formatting context */
    clear: both;    /* clears both left and right floats */
}
.things-container {
    max-width: 600px;
}
.thing-container {
    margin: 0 0 3rem;
    clear: both;
}
.thing-container .left {
    float: left;
    width: 100px;
}
.thing-container .right {
    float: right;
    width: calc(100% - 120px);
}
.thing-container h3 {
    margin-top: 0;
}
.thing-container .product-image {
    width: 100%;
}
.thing-container .review {
    line-height: 1.5;
}