body {
  background-color: goldenrod;
}

main {
  width: 500px;
  margin: auto;
  text-align: center;
}

li {
  list-style: none;
}

.separator {
  width: 30%;
  background-color: black;
  height: 3px;
  margin: auto;
  margin-top: 30px;
  margin-bottom: 30px;
}

.book-list {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 2px solid black;
}

.book-one {
  display: flex;
  justify-content: space-between;
  background-color: #ddd;
  margin-bottom: 10px;
  width: 100%;
}

button {
  height: 40px;
  margin-top: 10px;
  border: 2px solid black;
  border-bottom: 5px solid black;
  border-right: 5px solid black;
}

form {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}

input {
  margin-bottom: 10px;
  width: 60%;
  height: 30px;
  border: 2px solid black;
}

#add-book {
  position: relative;
  right: -24%;
  width: 70px;
}

#nav-bar {
  display: flex;
  font-family: "Roboto", sans-serif;
  justify-content: space-between;
  align-items: center;
  background-color: rgb(197, 197, 219);
  width: 100%;
  margin-right: 10px;
  border: 2px solid black;
}

header {
  background-color: white;
}

.nav-list {
  display: flex;
  justify-self: flex-end;
}

#nav-bar h1 {
  margin-left: 10px;
}

.nav-list li {
  list-style: none;
  margin-right: 20px;
  border-right: 2px solid black;
  padding-right: 10px;
}

.nav-list li a {
  text-decoration: none;
  color: black;
  font-size: 1.2em;
}

.nav-list li a:hover {
  color: rgb(130, 9, 252);
}

footer {
  background-color: rgb(197, 197, 219);
  margin-bottom: 10px;
  width: 100%;
  margin-right: 10px;
  margin-top: 30px;
  font-family: Calibri, "Trebuchet MS", sans-serif;
  border: 2px solid black;
  position: fixed;
  bottom: 20px;
}

#contact {
  display: flex;
  background-color: white;
  flex-direction: column;
  justify-content: flex-start;
  text-align: justify;
  align-items: center;
  font-size: larger;
  font-family: Calibri, "Trebuchet MS", sans-serif;
  font-weight: 600;
}

#contact ul li {
  list-style-type: disc;
  margin-right: 20px;
  padding-right: 10px;
}

.date {
  height: 30px;
  text-align: right;
  padding-right: 20px;
  padding-top: 5px;
  font-size: large;
}

@media screen and (min-width: 600px) {
  ::placeholder {
    font-size: larger;
  }

  main {
    width: 98%;
  }

  input {
    height: 50px;
  }

  .remove-btn {
    margin-right: 20px;
  }

  .book-one li {
    padding-left: 20px;
    font-size: larger;
  }
}