style.css

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #ACDF87;
}

#header {
    display: flex;
}

.glitter {
    transform: rotate(180deg);
}

.fairy {
    margin-left: -10px;
}

h1 {
    margin-left: 45px;
    font-family:cursive;
}

#container {
    display: flex;
    justify-content: center;
    width: 720px;
    flex-wrap: wrap;
}

#container .book {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 150px;
    height: 100px;
    border: 2px solid green;
    margin: 12px 12px;
    text-align: center;
}

.book {
    display: flex;
    flex-direction: column;
}

.book button {
    margin-top: 8px;
    width: 102px;
    border: 2px green;
    border-style: dashed;
}

#newbook {
    display: flex;
    justify-content: center;
    margin-bottom: 12px;
}

#footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
}

.form-title {
    margin-bottom: 12px;
    text-align: center;
}

.form-author {
    margin-bottom: 12px;
    text-align: center;
}