:root {
  --bg: #f4efe6;
  --ink: #2b2a26;
  --accent: #b3402e;
  --line: #d8cdb9;
  --panel: #fffaf0;
  --muted: #8a8277;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Songti SC", "Noto Serif SC", Georgia, serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 20%, rgba(179, 64, 46, 0.08), transparent 40%),
    var(--bg);
}

.topbar {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.topbar h1 {
  font-size: 1.1rem;
  margin: 0;
}

.topbar nav a {
  margin-right: 0.75rem;
  color: var(--accent);
  text-decoration: none;
}

.tokenbar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  max-width: 880px;
  margin: 1rem auto 0;
  padding: 0 1rem;
  font-size: 0.9rem;
}

.tokenbar input {
  flex: 1;
  max-width: 360px;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
}

.tokenbar button {
  padding: 0.4rem 0.9rem;
}

.tokenbar #token-msg {
  color: var(--accent);
  font-size: 0.85rem;
}

.tokenbar #token-msg.ok {
  color: #2e7d32;
}

.shell {
  max-width: 880px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.5rem;
}

.actions {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
}

button {
  padding: 0.5rem 1rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  border-radius: 6px;
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.progress-wrap {
  margin-top: 1rem;
}

.progress {
  height: 10px;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
}

.progress > i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width 0.2s;
}

.speed {
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.log {
  margin-top: 1rem;
  padding: 0;
  list-style: none;
  font-family: ui-monospace, Menlo, monospace;
  font-size: 0.8rem;
  max-height: 260px;
  overflow: auto;
}

.log li {
  padding: 0.2rem 0;
  border-bottom: 1px dashed var(--line);
}

.tasks {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.tasks th,
.tasks td {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid var(--line);
}

/* 书库：深色封面墙 */
body.library-page {
  --bg: #18191b;
  --ink: #f1eee8;
  --line: #33363b;
  --panel: #222427;
  --muted: #979da5;
  --accent: #c8553d;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 0%, rgba(200, 85, 61, 0.12), transparent 42%),
    radial-gradient(circle at 85% 6%, rgba(120, 140, 170, 0.07), transparent 45%),
    var(--bg);
}

.library-page .shell {
  max-width: 1240px;
}

.library-page .library-bar {
  background: var(--panel);
  border-color: var(--line);
}

.library-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.library-bar input[type="search"] {
  flex: 1;
  min-width: 220px;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
}

.library-bar select {
  padding: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
}

.library-page .library-bar input[type="search"],
.library-page .library-bar select {
  background: #2b2e32;
  border-color: #3a3e44;
  color: var(--ink);
}

.library-page .library-bar input[type="search"]::placeholder {
  color: var(--muted);
}

.library-bar #count {
  font-size: 0.85rem;
  color: var(--muted);
}

.books {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1.6rem 1.15rem;
  margin-top: 1.5rem;
}

@media (max-width: 1080px) {
  .books { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .books { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  .books { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.2rem 0.85rem; }
}

@media (max-width: 470px) {
  .books { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.book-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: inherit;
  text-decoration: none;
  animation: card-in 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
  animation-delay: calc(var(--i, 0) * 30ms);
}

.bc-cover {
  position: relative;
  aspect-ratio: 2 / 3;
  border-radius: 5px;
  overflow: hidden;
  background: linear-gradient(140deg, #b3402e, #5e2118);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.bc-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.bc-ph {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: rgba(255, 255, 255, 0.92);
  font-size: 2rem;
  font-weight: 700;
}

.bc-rating {
  position: absolute;
  top: 0;
  left: 0;
  padding: 0.22rem 0.4rem 0.26rem;
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  border-bottom-right-radius: 5px;
  font-variant-numeric: tabular-nums;
}

.bc-status {
  position: absolute;
  top: 0.35rem;
  right: 0.35rem;
  padding: 0.14rem 0.42rem;
  font-size: 0.66rem;
  line-height: 1.35;
  border-radius: 999px;
  color: #f4f1ec;
  background: rgba(12, 13, 14, 0.68);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

.bc-status.s-reading { color: #9ecbe8; }
.bc-status.s-read { color: #a9d49a; }
.bc-status.s-fav { color: #f0a58c; }

.bc-overlay {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  padding: 0.5rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.82), rgba(0, 0, 0, 0));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.book-card:hover .bc-overlay,
.book-card:focus-visible .bc-overlay {
  opacity: 1;
}

.bc-title {
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bc-author {
  font-size: 0.78rem;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.book-card:hover .bc-cover {
  transform: translateY(-3px);
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.6);
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .book-card { animation: none; }
  .bc-cover { transition: none; }
}

.tag {
  font-size: 0.68rem;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  color: #f4f1ec;
}

.empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--muted);
  padding: 3rem 1rem;
}

/* 书籍详情 */
.book-form {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.book-cover {
  flex: 0 0 150px;
  height: 200px;
  background: linear-gradient(135deg, #b3402e, #7a2a1d);
  border-radius: 8px;
  overflow: hidden;
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-fields {
  flex: 1;
  min-width: 260px;
  display: grid;
  gap: 0.7rem;
}

.book-fields label {
  display: grid;
  gap: 0.25rem;
  font-size: 0.85rem;
  color: #6b6457;
}

.book-fields input,
.book-fields textarea,
.book-fields select {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font-family: inherit;
  font-size: 0.95rem;
}

.actions-row {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.actions-row .danger {
  border-color: #b3402e;
  color: #b3402e;
}

.actions-row .btn-cover {
  padding: 0.5rem 1rem;
  border: 1px solid var(--ink);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
}

.actions-row #msg {
  margin-left: 0.5rem;
  color: #2e7d32;
}