html {
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

body {
  display: flex;
  flex-direction: column;
  height: 98.5vh;
}

.hide {
  display: none;
}

.show {
  display: block;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 5px solid black;
}

.nav-container .logo {
  font-size: 20px;
  font-weight: bolder;
  margin-left: 50px;
}

.navigation-options {
  list-style: none;
  display: flex;
  column-gap: 7px;
  margin-right: 50px;
}

#date {
  text-align: end;
}

li a {
  text-decoration: none;
  color: black;
  border-right: 5px solid black;
  padding-right: 4px;
  display: inline-block;
  max-height: 18.9833px;
}

#list h1 {
  text-align: center;
}

.no-books {
  text-align: center;
}

.book-list {
  border: 3px solid black;
  padding-left: 0;
  margin: 0 20px;
  min-width: 267px;
  list-style: none;
}

.book {
  display: flex;
  justify-content: space-between;
}

.text {
  margin-left: 50px;
}

.book-info {
  font-size: 10px;
}

.remove-book {
  background-color: white;
  height: 25px;
  width: 10%;
  min-width: 100px;
  align-self: center;
  margin-right: 50px;
  border: 1px solid black;
  box-shadow: 6px 6px;
  cursor: pointer;
  font-size: 12px;
}

.element-0 {
  background-color: lightgrey;
}

hr {
  margin: 30px auto;
  width: 20vw;
}

form {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 100px;
}

form input {
  width: 300px;
  height: 30px;
  border-radius: 3px;
  border: 1px solid black;
}

.add-button {
  margin-left: 240px;
  width: 60px;
  height: 30px;
  background-color: white;
  border: 4px outset black;
  box-shadow: 4px 4px;
  cursor: pointer;
}

.contact-container {
  display: flex;
  flex-direction: row;
  justify-content: center;
}

#contact > h2 {
  font-size: 45px;
  text-align: center;
}

#contact > *:not(h2) {
  font-size: 25px;
}

footer {
  display: flex;
  justify-content: center;
  border: 5px solid black;
  position: relative;
  bottom: 5px;
  width: 100%;
  margin-top: auto;
}

footer .footer-text {
  font-size: 20px;
}

@media only screen and (min-width: 768px) {
  .nav-container .logo {
    font-size: 30px;
  }

  .book-info {
    font-size: 20px;
  }

  .remove-book {
    height: 51px;
    width: 20%;
    font-size: 20px;
  }
}