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

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  box-sizing: border-box;
  transition: 0.2s;
}

.container {
  padding: 1rem 0;
}

.container > *:not(:last-child) {
  margin-bottom: 2rem;
}

.title {
  padding: 0 2rem;
}

.books__container > *:not(:last-child) {
  margin-bottom: 1rem;
}

.book > h2,
.book > p {
  padding: 0 2rem;
}

.book > *:not(:last-child) {
  margin-bottom: 1rem;
}

.bookmark__options {
  width: 100%;
  overflow-x: auto;
  display: flex;
  flex-direction: row;
  padding: 0 2rem;

  -ms-overflow-style: none;  /* IE and Edge */
  scrollbar-width: none;  /* Firefox */
}

.bookmark__options::-webkit-scrollbar {
  display: none;
}

.bookmark__options > input {
  position: fixed;
  opacity: 0;
  pointer-events: none;
}

.bookmark__options > label {
  display: block;
  width: 3rem;
  border: solid 1px lightgray;
  border-radius: 0.2rem;
  flex-shrink: 0;
  text-align: center;
  padding: 0.5rem 0;
  cursor: pointer;
  transition: 0.1s;
}

.bookmark__options > label:not(:last-child) {
  margin-right: 0.2rem;
}

.bookmark__options > input:checked+label {
  color: orangered;
  border-color: orangered;
}

.form__submit {
  padding-left: 2rem;
  padding-top: 1rem;
}

input[type="submit"] {
  padding: 0.5rem 1.5rem;
  background-color: #fff;
  border: solid 1px lightgray;
  border-radius: 0.2rem;
  font-size: 1.2rem;
  cursor: pointer;
  color: #000;
  transition: 0.1s;
}

input[type="submit"]:hover {
  border-color: gray;
}

input[type="submit"]:active {
  border-color: orangered;
  color: orangered;
}

.tag {
  padding: 0 2rem;
}

.error {
  padding: 1rem 2rem;
}