body {
    background-color: lightgrey;
}

#container {
    width: 960px;
    margin: 0 auto;
    box-align: center;
    background-image: url("../images/light-grey-terrazzo.png");
}

* {
    box-sizing: border-box;
}

h1 {
    font-size: 36px;
    font-weight: bold;
}

h2 {
    font-size: 24px;
    font-weight: bold;
}

h3 {
    font-size: 20px;
    line-height: 40px;
}

#header {
    padding: 20px;
    background: gray;
    width: 400px;
    margin-bottom: 20px;
}

#instructions {
    padding: 20px;
    background: lightblue;
    width: 80%;
    margin: 0 auto;
    box-align: center;
}

p {
    font-size: 18px;
    line-height: 36px;
}

#number-stats-holder {
    margin: 0 auto;
    box-align: center;
    width: 50%;
}

#number-to-guess {
    font-size: 40px;
    padding: 30px;
    width: 200px;
    font-weight: bold;
    text-align: center;
    background: lightgreen;
    float: left;
    box-align: center;
    margin-top: 20px;
}

#stats {
    padding: 30px;
    width: 200px;
    margin-top: 20px;
    margin-left: 60px;
    font-weight: bold;
    background: pink;
    text-align: center;
    float: left;
    box-align: center;
}

#number-stats-holder::after {
    content: "";
    clear: both;
    display: table;
}

#crystals::after {
    content: "";
    clear: both;
    display: table;
}

#crystals {
    width: 70%;
    margin: 0 auto;
    box-align: center;
}

#gem-a, #gem-b, #gem-c, #gem-d {
    float: left;
    width: 130px;
    height: 130px;
    border: 4px solid gray;
    margin-top: 20px;
    margin-left: 10px;
    margin-right: 10px;
    margin-bottom: 20px;
    background-color: #ffffff;
}

#gem-a {
    margin-left: 40px;
}

.crystals {
    width: 100px;
    height: 100px;
    margin: 0 auto;
    padding-top: 20px;
    padding-left: 20px;
}

#current-count-header {
    background: lightgoldenrodyellow;
    padding: 10px;
    font-weight: bold;
    width: 50%;
    margin: 0 auto;
    box-align: center;
    text-align: center;
}

#current-count {
    background: lightgoldenrodyellow;
    font-size: 40px;
    font-weight: bold;
    text-align: center;
    font-weight: bold;
    padding: 10px;
    width: 50%;
    margin: 0 auto;
    box-align: center;
}