styles.css

form {
    display: flex;
    flex-direction: column;
    width: 360px;
    padding: 30px;
    background-color: var(--cream);
}

body {
    background-color: antiquewhite;
}

h1 {
    margin-left: 15px;
    font-size: 40px;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color:rgb(168, 129, 82);
    background-color: rgb(255, 240, 217);
    padding: 7px;
}

#author,
#title, 
#pages,
#description {
  width: 100%;
  padding: 15px 0 5px 0;
  background-color: var(--cream);
  border: none;
  border-bottom: 2px dotted;
  color: var(--blue);
}

#submit {
    background-color: antiquewhite;
    border: none;
    margin: 10px;
    margin-top: 20px;
    padding: 10px
}

#formHolder {
    margin: 10px;
    background-color: rgb(255, 227, 192);
    margin: none;
}

#newBookH3 {
    margin-left: 15px;
    font-size: 35px;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color:rgb(168, 129, 82);
}

#container {
    margin: 10px;
    padding: 15px;
    font-family: 'Times New Roman', Times, sans-serif;
    font-size: large;
    background-color: rgb(250, 224, 200);
}