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

body {
  margin: 0 auto;
}

p {
  margin: 0;
}

a:link {
  color:hotpink;
  text-decoration: none;
}
a:visited {
  color: color-mix(in oklch, hotpink, purple 40%);
}
a:hover,
a:focus {
  text-decoration: underline;
  color: color-mix(in oklch, hotpink, red 40%);
}
a:active {
  color: color-mix(in oklch, hotpink, red 66%);
}

.HeaderContainer,
main {
  padding: 1rem 3rem;
  margin: 0 auto;
}

@media screen and (min-width: 60rem) {
  .HeaderContainer,
  main {
    padding: 1rem 1.5rem;
    max-width: 50rem;
  } 
}

header {
  background-color: ghostwhite;
  border-bottom: 1px solid gainsboro;
}

header h1 {
  margin: 0 0 .5rem;
  font-size: 1.5rem;
}
header p {
  margin: 0;
  font-size: 1rem;
}

fieldset {
  --inner-padding: 1.5rem;

  border: 1px solid gainsboro;
  background-color: ghostwhite;
  padding: var(--inner-padding);
  margin-bottom: 1rem;
  border-radius: .5rem;
  margin: 0 calc(-1 * var(--inner-padding));
}

.InputGroup {
  display: flex;
  flex-direction: row;
  gap: .5rem;
}

legend {
  font-weight: bold;
  padding: 0 .5rem;
  margin: 0 -.5rem;
}

label {
  display: block;
  margin-bottom: .5rem;
  font-size: .85rem;
  font-weight: bold;
}

input {
  width: 100%;
  padding: .5rem;
  border: 1px solid gainsboro;
  border-radius: .25rem;
  font-size: 1rem;
}

.button,
button {
  padding: .5rem 1rem;
  background-color: dodgerblue;
  color: white;
  border: none;
  border-radius: .25rem;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  min-height: 2.5rem;
}

.Book {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  align-items: start;
  gap: 1.5rem;
  margin: 1rem 0 2.5rem;
}

.Book img {
  width: 3rem;
  height: auto;
  object-fit: contain;
}

.Book h3 {
  margin: 0 0 .25rem;
}

.BookDetails__author {
  font-size: 1rem;
}
.BookDetails__isbn {
  margin-top: .25rem;
  font-size: .65rem;
  color: gray;
}