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

body {
  font-family: Arial, sans-serif;
  background-color: beige;
  padding: 20px;
}

h1 {
  text-align: center;
  padding: 22px;
  margin: 22px;
}

.main-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  width: 100%;
}

#openModal {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 4px;
}

#library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  width: 100%;
  margin-top: 20px;
  justify-content: center;
}

.book-card {
  background-color: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  border-left: 5px solid #007bff;
  border-radius: 6px;
}

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

.book-card p {
  margin: 6px 0;
  color: #333;
}

.card-buttons {
  display: flex;
  gap: 10px;
  margin-top: 15px;
}

.card-buttons button {
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.toggle-btn {
  background-color: #ffc107;
  color: #000;
}

.remove-btn {
  background-color: #dc3545;
  color: white;
}

dialog {
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #ccc;
  width: 400px;
  background-color: white;
  margin: auto;
  position: fixed;
}

dialog div {
  margin-bottom: 12px;
}

dialog label {
  display: inline-block;
  width: 130px;
  font-weight: bold;
}

dialog input[type='text'],
dialog input[type='number'] {
  width: calc(100% - 135px);
  padding: 4px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

.modal-actions button {
  padding: 6px 15px;
  cursor: pointer;
}

dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}