* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-color: #f5f5f5;
  color: #333;
}

body.modal-open {
  overflow: hidden;
}

header {
  background-color: #2c3e50;
  color: #fff;
  padding: 1.25rem;
  text-align: center;
}

main {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  background-color: #fff;
  padding: 1.25rem;
  margin-bottom: 2rem;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.library-card .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.library-controls {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto auto;
  gap: 0.75rem;
  align-items: end;
  margin-bottom: 1rem;
}

.search-control,
.sort-control,
.page-size-control {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.sort-control span {
  font-weight: 700;
  font-size: 0.9rem;
}

h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  border-bottom: 1px solid #ddd;
  padding-bottom: 0.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

th,
td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid #e0e0e0;
  text-align: left;
  vertical-align: middle;
}

th {
  background-color: #f0f0f0;
  font-weight: bold;
}

tr:hover {
  background-color: #fafafa;
}

.book-thumb {
  width: 64px;
  height: 88px;
  object-fit: cover;
  border-radius: 4px;
  display: block;
  background-color: #e5e7eb;
}

button {
  padding: 0.4rem 0.7rem;
  margin-right: 0.3rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
}

.primary-btn {
  background-color: #2c7be5;
  color: #fff;
  padding: 0.55rem 0.9rem;
  font-weight: 600;
}

.primary-btn:hover {
  background-color: #1f5fb5;
}

.ghost-btn {
  background-color: transparent;
  color: #2c7be5;
  border: 1px solid #c9ddff;
  padding: 0.5rem 0.9rem;
}

.ghost-btn:hover {
  background-color: #eaf2ff;
}

.icon-btn {
  background: transparent;
  border: none;
  color: #666;
  font-size: 1.1rem;
  line-height: 1;
  padding: 0.25rem;
  margin: 0;
}

.icon-btn:hover {
  color: #111;
}

.edit-btn {
  background-color: #3498db;
  color: #fff;
}

.edit-btn:hover {
  background-color: #2980b9;
}

.delete-btn {
  background-color: #e74c3c;
  color: #fff;
}

.delete-btn:hover {
  background-color: #c0392b;
}

form div {
  margin-bottom: 0.75rem;
}

label {
  font-weight: bold;
}

input[type='text'],
input[type='search'],
input[type='url'],
input[type='number'],
select {
  width: 100%;
  padding: 0.4rem;
  margin-top: 0.25rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  background-color: #fff;
}

input[type='checkbox'] {
  margin-right: 0.4rem;
}

button[type='submit'] {
  background-color: #2ecc71;
  color: #fff;
  margin-top: 0.5rem;
}

button[type='submit']:hover {
  background-color: #27ae60;
}

ul {
  list-style: none;
  padding-left: 0;
}

ul li {
  margin-bottom: 0.4rem;
}

/* Modal */
.modal.hidden {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.35);
  display: grid;
  place-items: center;
  padding: 1rem;
  z-index: 10;
}

.modal-card {
  background: #fff;
  width: min(640px, 100%);
  border-radius: 10px;
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.18);
  padding: 1.5rem;
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.9rem;
}

.form-row.half {
  flex-direction: row;
  gap: 1rem;
}

.form-row.half > div {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-row.inline {
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
  margin-top: 0.6rem;
}

@media (max-width: 800px) {
  .library-controls {
    grid-template-columns: 1fr;
    align-items: stretch;
  }
}