style.css

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  line-height: 24px;
  font-weight: normal;
  font-family: 'Balsamiq Sans', cursive;
  font-style: normal;
}

ul,
li {
  list-style: none;
}

a {
  text-decoration: none;
  color: black;
}

button {
  border: none;
  border-radius: 0;
}

button:hover {
  cursor: pointer;
  opacity: 0.8;
}

button:active {
  opacity: 0.5;
}

.d-flex-2 {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.d-flex-only {
  display: flex;
}

.text-center {
  text-align: center;
}

.active {
  color: blue;
}

.br {
  border-right: 0.3em solid black;
}

header {
  border: 0.3em solid black;
  padding: 8px 16px 8px 12px;
}

header .container {
  width: 100%;
  justify-content: space-between;
  align-items: center;
}

section.bk-sect {
  padding: 24px;
}

section.bk-form form {
  padding: 24px 0;
  gap: 12px;
  width: 100%;
}

section.bk-sect h1,
section.bk-form h2 {
  text-align: center;
  font-weight: 500;
}

section.bk-form form input {
  outline: none;
  width: 98%;
  height: 32px;
  padding: 2px 16px 2px 15px;
  border: 2px solid black;
}

.border {
  border: 2px solid black;
}

section.main-book ul {
  margin: 32px 0;
}

section.main-book ul li {
  padding: 0 8px;
  height: 48px;
  width: 100%;
  display: flex;
  justify-content: space-between;
}

section.main-book ul li div h2 {
  font-size: 14px;
  align-self: flex-start;
}

section.main-book ul li div {
  display: flex;
  align-self: flex-start;
  margin: auto 0;
  gap: 4px;
  width: 100%;
  flex-wrap: wrap;
}

section.bk-form form button,
section.main-book ul li button {
  box-shadow: 0.17em 0.17em;
  border: 2px solid black;
  padding: 8px;
  align-self: flex-end;
  font-weight: bold;
}

section.main-book ul li button {
  margin: auto 0;
}

.hide {
  display: none;
}

.mr-4 {
  margin-right: 4px;
}

.p-tb {
  padding-top: 40px;
  padding-bottom: 40px;
}

footer p {
  font-size: 20px;
  padding: 15px 20px;
  border: 0.3em solid black;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: white;
}

section.contact-sect p {
  margin: 20px auto;
}

section.contact-sect ul li {
  align-self: flex-start;
  margin: 0 24px;
  list-style: disc;
}

header .container nav ul li {
  display: inline-block;
  padding: 5px;
}

section.main-book ul li:nth-child(odd) {
  background-color: rgba(128, 128, 128, 0.5);
}

footer p a {
  color: blue;
}

.date {
  display: flex;
  justify-content: flex-end;
  margin: 20px;
}

@media screen and (min-width: 768px) {
  section.bk-sect {
    padding: 4% 10%;
  }

  section.main-book ul {
    max-width: 600px;
    margin: 32px auto;
  }

  .p-tb-lg {
    padding-top: 8%;
    padding-bottom: 8%;
  }

  section.bk-form form {
    max-width: 300px;
    margin: 0 auto;
  }

  section.contact-sect p {
    max-width: 444px;
    text-align: left;
    margin: 40px auto;
  }

  header .container nav ul li {
    padding: 0.3em 3em;
  }
}