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

body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;

  background-color: #e6e6e6;
}

header,
main {
  padding: 15px;
  width: 100%;
  max-width: 1400px;
}

header {
  flex: 0;
}

main {
  flex: 1;
  position: relative;
}

.sub-header {
  display: flex;
  justify-content: space-between;
  font-size: 1.2rem;
}

.sub-header > button {
  appearance: none;
  border: none;
  background-color: green;
  color: white;
  padding: 10px 28px;
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
}

.sub-header > button:hover {
  background-color: rgb(1, 110, 1);
}

#library-container {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 25vw));
  margin-top: 15px;
}

.card {
  border: 1px solid gray;
  border-radius: 5px;
  padding: 15px 15px 50px;
  position: relative;
}

.card > h3 {
  margin-bottom: 10px;
}

.card > p {
  font-style: italic;
  margin-bottom: 20px;
}

.card > button {
  appearance: none;
  border: none;
  border-radius: 10px;
  font-size: 0.7rem;
  cursor: pointer;
  text-transform: uppercase;
  font-weight: bold;
  padding: 8px 20px;
  position: absolute;
}

.card > button#remove {
  background-color: pink;
  color: darkred;
  bottom: 15px;
  right: 15px;
}

.card > button[id="read"] {
  bottom: 15px;
  left: 15px;
  background-color: #e6e6e6;
}

.card > button[id="read"].read {
  color: white;
  background-color: green;
}

#add-book-dialog {
  border: none;
  border-radius: 10px;
  padding: 24px 32px;
  position: absolute;
  top: 20%;
  left: 40%;
}

#add-book-dialog > h3 {
  margin-bottom: 20px;
}

::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

#add-book-dialog > form {
  margin: 10px 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  justify-items: start;
  align-items: center;
}

#add-book-dialog > form > label {
  justify-self: end;
}

#add-book-dialog button {
  appearance: none;
  border: none;
  border-radius: 10px;
  font-size: 0.7rem;
  cursor: pointer;
  text-transform: uppercase;
  font-weight: bold;
  padding: 8px 20px;
  justify-self: center;
  margin-top: 12px;
}

#add-book-dialog button#confirm {
  background-color: green;
  color: white;
}

/* error message styles */
.error {
  width: 100%;
  padding: 0;
  font-size: 80%;
  color: white;
  background-color: #900;
  border-radius: 0 0 5px 5px;

  box-sizing: border-box;
}

.error.active {
  padding: 0.3em;
}

form p * {
  display: block;
}

p.inline-block {
  align-self: end;
}

p.inline-block * {
  display: inline-block;
}