:root {
  --background-color: white;
  --foreground-color: rgba(0, 0, 0, 0.75);
  --primary-color: lightseagreen;
  --primary-foreground-color: white;
  --secondary-color: whitesmoke;
  --secondary-foreground-color: lightseagreen;
  --destructive-color: tomato;
  --destructive-foreground-color: white;
  --loader-color: whitesmoke;
  --border-color: gainsboro;
  --selection-color: rgba(32, 178, 170, 0.5);
  --border-radius: 0.5rem;
}

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

body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: var(--background-color);
  color: var(--foreground-color);
}

::selection {
  background-color: var(--selection-color);
}

#page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  background-color: rgba(var(--background-color), 0.5);
  backdrop-filter: blur(1rem);
  left: 0;
  right: 0;
  padding: 1rem;
  height: 5rem;
}

#page-heading {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin: 0;
}

.btn {
  background-color: var(--primary-color);
  color: var(--primary-foreground-color);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  text-align: center;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn:hover {
  opacity: 0.75;
}

.btn-icon {
  width: 1rem;
  height: 1rem;
  stroke-width: 0.5rem;
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: var(--secondary-foreground-color);
}

#library {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  padding: 7rem 1rem 1rem 1rem;
}

#dialog::backdrop {
  background-color: black;
  opacity: 50%;
  backdrop-filter: blur(5px);
}

#dialog {
  margin: auto;
  margin: auto;
  border-radius: var(--border-radius);
  border: none;
  padding: 1rem;
  width: 32rem;
  color: var(--foreground-color);
}

.dialog-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.dialog-heading {
  font-size: xx-large;
}

.close-dialog-button {
  background-color: transparent;
  padding: 0;
  margin: 0;
  border: none;
  cursor: pointer;
}

.close-dialog-icon {
  width: 1rem;
  height: 1rem;
  stroke-width: 0.5rem;
  color: var(--destructive-color);
}

.card {
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-image {
  width: 100%;
  aspect-ratio: 1/1.5;
  background-color: var(--loader-color);
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
}

.image {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 1/1.5;
  border-radius: var(--border-radius);
  display: block;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: end;
  padding-top: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-checkbox-field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-heading {
  font-size: x-large;
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-subheading {
  font-size: medium;
  color: rgba(0, 0, 0, 0.5);

  margin-bottom: 0.5rem;
}

.num-pages {
  font-size: medium;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 0.25rem;

  margin-bottom: 1rem;
}

.num-pages-icon {
  width: 1rem;
}

.card-actions {
  display: flex;
  gap: 0.5rem;
}

.book-read-icon-fill {
  width: 2rem;
  height: 2rem;
  fill: var(--primary-color);
  color: var(--primary-foreground-color);
}

.book-read-icon-fill:hover {
  opacity: 0.75;
}

.book-read-icon {
  width: 2rem;
  height: 2rem;
  color: var(--primary-color);
}

.book-read-icon:hover {
  opacity: 0.75;
}

.toggle-read-button {
  background-color: transparent;
  padding: 0;
  margin: 0;
  border: none;
  cursor: pointer;
}

.remove-button {
  background-color: transparent;
  padding: 0;
  margin: 0;
  border: none;
  cursor: pointer;
}

.delete-icon {
  height: 2rem;
  color: var(--destructive-color);
}

.delete-icon:hover {
  opacity: 0.75;
}

.input-label {
  font-size: medium;
}

input[type=text],
input[type=number],
input[type=url]
{
  width: 100%;
  padding: 0.75rem;
  border-radius: var(--border-radius);
  box-sizing: border-box;
  border: 0.15rem solid var(--border-color);
  outline: none;
}

input[type=text]:focus,
input[type=number]:focus,
input[type=url]:focus
{
  border: 0.15rem solid var(--primary-color);
}

input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  accent-color: rgb(26, 162, 156);
  cursor: pointer;
}

input[type="checkbox"]:hover {
  opacity: 1;
}


@media only screen and (min-width: 40rem) {
  #library {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
}

@media only screen and (min-width: 48rem) {
  #library {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
  }
}

@media only screen and (min-width: 64rem) {
  #library {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 1rem;
  }
}

@media only screen and (min-width: 80rem) {
  #library {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
    gap: 1rem;
  }
}

@media only screen and (min-width: 96rem) {
  #library {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr;
    gap: 1rem;
  }
}