/* ============================================================
   藏书阁 · 书架页面样式 v5
   变量 → 布局 → 工具栏 → 书架(3D) → 卡片视图 → 弹窗 → 响应式
   ============================================================ */

:root {
  --bg-1: #f6efe2;
  --bg-2: #ede2cc;
  --bg-3: #e4d5b8;
  --panel: #fffaf2;
  --panel-border: #e6d7c0;
  --ink: #4a3b2a;
  --ink-light: #9a835f;
  --ink-mid: #6b4f2e;
  --accent: #b98a4e;
  --accent-deep: #9a6d35;
  --wood-1: #c69a5f;
  --wood-2: #a8793f;
  --wood-3: #7d5427;
  --shadow: rgba(92, 68, 41, 0.16);

  /* 书脊花纹 */
  --spine-pyramid:
    linear-gradient(315deg, transparent 75%, rgba(255, 255, 255, 0.1) 0),
    linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.1) 0),
    linear-gradient(135deg, rgba(255, 255, 255, 0.2) 166px, transparent 0),
    linear-gradient(45deg, rgba(0, 0, 0, 0.1) 75%, transparent 0);
  --spine-stairs:
    repeating-linear-gradient(63deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.1) 1px, transparent 3px, transparent 0),
    linear-gradient(127deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.1) 90px, transparent 55%, transparent 0);
  --spine-argyle:
    repeating-linear-gradient(120deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.1) 1px, transparent 1px, transparent 60px),
    repeating-linear-gradient(60deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.1) 1px, transparent 1px, transparent 60px);
  --spine-tartan:
    repeating-linear-gradient(0deg, transparent, transparent 50px, rgba(0, 0, 0, 0.28) 50px, rgba(0, 0, 0, 0.28) 53px, transparent 53px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.08) 2px, transparent 2px, transparent 6px);
}

html[data-theme="dark"] {
  --bg-1: #211a13;
  --bg-2: #1a140e;
  --bg-3: #14100b;
  --panel: #2b2119;
  --panel-border: #453726;
  --ink: #e8dcc8;
  --ink-light: #a08a68;
  --ink-mid: #cbb694;
  --accent: #d2a468;
  --accent-deep: #b98a4e;
  --shadow: rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 500px at 50% -10%, rgba(255, 255, 255, 0.5), transparent 60%),
    linear-gradient(160deg, var(--bg-1) 0%, var(--bg-2) 55%, var(--bg-3) 100%);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  transition: background 0.4s, color 0.4s;
}

html[data-theme="dark"] body {
  background:
    radial-gradient(1200px 500px at 50% -10%, rgba(210, 164, 104, 0.08), transparent 60%),
    linear-gradient(160deg, var(--bg-1) 0%, var(--bg-2) 55%, var(--bg-3) 100%);
}

.shelf-page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

/* ---------------- 头部 ---------------- */
.shelf-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.shelf-heading { text-align: center; flex: 1; }

.back-home {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  color: var(--ink-mid);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 2px 8px var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.back-home:hover { transform: translateY(-1px); box-shadow: 0 4px 12px var(--shadow); }

.shelf-title {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--ink);
}
.shelf-subtitle {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--ink-light);
  letter-spacing: 1px;
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--ink-mid);
  font-size: 17px;
  cursor: pointer;
  box-shadow: 0 2px 8px var(--shadow);
  transition: transform 0.2s;
}
.icon-btn:hover { transform: translateY(-1px) rotate(-8deg); }

/* ---------------- 统计条 ---------------- */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.stat-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 18px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  box-shadow: 0 2px 10px var(--shadow);
  min-width: 92px;
  justify-content: center;
}
.stat-num {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-deep);
  font-variant-numeric: tabular-nums;
}
html[data-theme="dark"] .stat-num { color: var(--accent); }
.stat-label { font-size: 12px; color: var(--ink-light); }

/* ---------------- 主舞台 ---------------- */
.shelf-stage {
  position: relative;
  padding: 26px 28px 30px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  box-shadow: 0 14px 36px var(--shadow);
}

/* ---------------- 工具栏 ---------------- */
.shelf-toolbar { margin-bottom: 8px; }

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 400px;
  margin: 0 auto 14px;
  padding: 9px 16px;
  background: var(--bg-1);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  box-shadow: inset 0 1px 3px var(--shadow);
  transition: border-color 0.2s, box-shadow 0.2s;
}
html[data-theme="dark"] .search-box { background: rgba(0, 0, 0, 0.25); }
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(185, 138, 78, 0.18);
}
.search-icon { font-size: 15px; line-height: 1; }
.search-box input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  color: var(--ink);
}
.search-box input::placeholder { color: var(--ink-light); }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 12px;
}

.filter-btn, .chip-btn {
  padding: 6px 14px;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: var(--bg-1);
  color: var(--ink-mid);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
html[data-theme="dark"] .filter-btn,
html[data-theme="dark"] .chip-btn { background: rgba(255, 255, 255, 0.06); }
.filter-btn:hover, .chip-btn:hover { transform: translateY(-1px); }
.filter-btn.active, .chip-btn.active, .chip-btn.on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 2px 10px rgba(185, 138, 78, 0.4);
}
.chip-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.chip-btn.primary:hover { background: var(--accent-deep); }
.chip-btn.danger { color: #b3572f; border-color: rgba(179, 87, 47, 0.4); }
.chip-btn.danger:hover { background: rgba(179, 87, 47, 0.1); }

.add-book-btn {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  border-color: transparent;
  color: #fff;
  font-size: 14px;
  padding: 8px 20px;
  box-shadow: 0 3px 12px rgba(185, 138, 78, 0.4);
}
.add-book-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(185, 138, 78, 0.5); }

.toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--panel-border);
  margin-bottom: 18px;
}
.status-filter { display: flex; gap: 6px; flex-wrap: wrap; }

.sort-select {
  padding: 6px 10px;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: var(--bg-1);
  color: var(--ink-mid);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  outline: none;
}
html[data-theme="dark"] .sort-select { background: rgba(255, 255, 255, 0.06); color: var(--ink-mid); }

.view-toggle {
  display: flex;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  overflow: hidden;
}
.view-btn {
  padding: 6px 12px;
  border: none;
  background: transparent;
  font-size: 14px;
  cursor: pointer;
  color: var(--ink-light);
  transition: all 0.2s;
}
.view-btn.active { background: var(--accent); color: #fff; }

/* ---------------- 3D 书架 ---------------- */
.shelf-area { width: 100%; }

.shelf-row { position: relative; margin-bottom: 6px; }

.shelf-books {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 4px;
  min-height: 250px;
  padding: 10px 6px 0;
  perspective: 1400px;
}

/* 木质隔板：厚度感 + 高光 + 前沿 */
.shelf-board {
  position: relative;
  height: 16px;
  border-radius: 3px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.22) 0%, transparent 30%),
    repeating-linear-gradient(90deg, rgba(0, 0, 0, 0.06) 0 2px, transparent 2px 14px),
    linear-gradient(180deg, var(--wood-1) 0%, var(--wood-2) 55%, var(--wood-3) 100%);
  box-shadow:
    0 4px 8px rgba(0, 0, 0, 0.22),
    0 1px 0 rgba(255, 255, 255, 0.25) inset;
}
/* 隔板两端小支架 */
.shelf-board::before, .shelf-board::after {
  content: "";
  position: absolute;
  bottom: -8px;
  width: 8px;
  height: 8px;
  background: var(--wood-3);
  clip-path: polygon(0 0, 100% 0, 100% 30%, 60% 100%, 0 100%);
}
.shelf-board::before { left: 6px; }
.shelf-board::after { right: 6px; transform: scaleX(-1); }

/* 书架装饰：小盆栽 / 沙漏 */
.shelf-deco {
  align-self: flex-end;
  font-size: 26px;
  line-height: 1;
  padding: 0 8px 6px;
  filter: drop-shadow(0 3px 3px rgba(0, 0, 0, 0.25));
  user-select: none;
}

/* ---------------- 书本 ---------------- */
.book {
  width: 46px;
  height: 240px;
  position: relative;
  transform-style: preserve-3d;
  transform-origin: bottom left;
  transform: translateZ(0) rotateY(0);
  transition: transform 0.9s cubic-bezier(0.2, 0.8, 0.3, 1);
  cursor: pointer;
  user-select: none;
  animation: bookFadeIn 0.6s ease both;
  flex: 0 0 auto;
}
.book.picked { animation: bookPop 0.7s ease; }

@keyframes bookFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes bookPop {
  0%, 100% { filter: none; }
  30% { filter: drop-shadow(0 0 14px rgba(255, 214, 90, 0.9)); }
}

.side {
  position: absolute;
  border: 2px solid rgba(20, 12, 4, 0.85);
  border-radius: 3px;
  font-weight: bold;
  text-align: center;
  transform-origin: center left;
}

.spine {
  position: relative;
  transform: rotateY(0) translateZ(0);
  overflow: hidden;
  background-size: cover;
  box-shadow: inset 0 0 12px rgba(0, 0, 0, 0.35);
}
.spine::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 4px;
  bottom: 4px;
  width: 3px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.1));
  border-radius: 2px;
}
.spine::after {
  content: "";
  position: absolute;
  right: 3px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0.1));
  border-radius: 2px;
}

.spine-title {
  margin: 0;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  line-height: 1.05;
  color: #f3e2b3;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
  max-height: calc(100% - 30px);
  overflow: hidden;
  white-space: nowrap;
}
.spine-author {
  position: absolute;
  color: #d9b96a;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 9px;
  font-weight: 600;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  max-height: 70px;
  overflow: hidden;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

/* 状态小徽章（书脊底部） */
.spine-status {
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.4);
}
.spine-status[data-status="read"] { background: #4caf7d; }
.spine-status[data-status="reading"] { background: #e8a33d; }
.spine-status[data-status="want"] { background: #c9c2b4; }
.book.faved .spine-status { box-shadow: 0 0 0 2px rgba(255, 215, 100, 0.85); }
.book.faved::after {
  content: "\2605";
  position: absolute;
  top: -4px;
  right: -6px;
  font-size: 12px;
  color: #ffcf4d;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
  z-index: 5;
}

.top {
  background-image: linear-gradient(90deg, rgba(255, 253, 246, 0.95) 90%, rgba(150, 135, 110, 0.9) 10%);
  background-size: 5px 5px;
  transform: rotateX(90deg);
}

.cover {
  background-size: cover;
  background-position: center;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px;
  transform: rotateY(90deg) translateZ(0);
  transition: transform 0.9s cubic-bezier(0.2, 0.8, 0.3, 1);
  color: #f5ecd8;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.55);
  border-width: 2px;
}
.cover .cover-title {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 2px;
  line-height: 1.4;
}
.cover .cover-author { font-size: 11px; opacity: 0.85; }
.cover .cover-stars { font-size: 11px; letter-spacing: 2px; color: #ffd97a; }

.book:hover {
  z-index: 30;
  transform: rotateX(-25deg) rotateY(-42deg) rotateZ(-14deg) translateY(32px) translateX(-22px);
}

.slanted-book {
  --lean-lift: 2px;
  transform: translateZ(0) rotateY(0) rotateZ(var(--lean-angle)) translateY(var(--lean-lift));
}
.slanted-book:hover {
  z-index: 30;
  transform: rotateX(-25deg) rotateY(-42deg) rotateZ(-14deg) translateY(32px) translateX(-22px);
}

/* ---------------- 卡片视图 ---------------- */
.grid-area {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 18px;
  padding: 4px 2px 10px;
}

.card {
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--panel-border);
  background: var(--bg-1);
  box-shadow: 0 4px 14px var(--shadow);
  transition: transform 0.25s, box-shadow 0.25s;
  animation: bookFadeIn 0.5s ease both;
}
.card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 12px 26px var(--shadow);
}
.card-cover {
  height: 190px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #f5ecd8;
  padding: 12px;
  text-align: center;
}
.card-cover .cover-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.45;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}
.card-cover .cover-author { font-size: 11px; opacity: 0.85; }
.card-cover .card-fav {
  position: absolute;
  top: 8px;
  right: 10px;
  font-size: 15px;
  color: #ffcf4d;
}
.card-body { padding: 10px 12px 12px; }
.card-status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--ink-light);
}
.card-status-row .st {
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 600;
}
.st[data-status="read"] { background: rgba(76, 175, 125, 0.16); color: #2f8a5c; }
.st[data-status="reading"] { background: rgba(232, 163, 61, 0.18); color: #b06f14; }
.st[data-status="want"] { background: rgba(0, 0, 0, 0.07); color: var(--ink-light); }
.card-stars { color: #d9a33d; letter-spacing: 1px; font-size: 11px; }

/* ---------------- 空状态 / 错误 ---------------- */
.empty-tip { padding: 46px 16px; text-align: center; color: var(--ink-light); }
.empty-emoji { font-size: 44px; margin-bottom: 8px; }
.empty-hint { font-size: 12px; opacity: 0.8; }

.bookshelf-error {
  padding: 40px 16px;
  text-align: center;
  color: #b05c3a;
  font-size: 14px;
  line-height: 1.8;
}

/* ---------------- 弹窗 ---------------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(30, 20, 8, 0.55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  animation: maskIn 0.25s ease;
}
@keyframes maskIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  position: relative;
  display: flex;
  gap: 26px;
  max-width: 640px;
  width: 100%;
  max-height: 86vh;
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 30px 32px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  animation: cardIn 0.3s cubic-bezier(0.2, 0.9, 0.3, 1.1);
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(24px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--bg-1);
  color: var(--ink-mid);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}
.modal-close:hover { background: var(--accent); color: #fff; transform: rotate(90deg); }

.modal-cover {
  flex: 0 0 180px;
  height: 260px;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #f5ecd8;
  text-align: center;
  padding: 16px;
  box-shadow: 8px 10px 0 rgba(0, 0, 0, 0.12), 0 12px 24px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}
/* 书脊阴影，更像一本真实的书 */
.modal-cover::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 14px;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.28), rgba(0, 0, 0, 0.06) 55%, rgba(255, 255, 255, 0.12));
}
.modal-cover .cover-title { font-size: 19px; font-weight: 800; letter-spacing: 2px; line-height: 1.5; text-shadow: 0 2px 5px rgba(0, 0, 0, 0.55); }
.modal-cover .cover-author { font-size: 12px; opacity: 0.9; }

.modal-info { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.modal-title { margin: 4px 0 4px; font-size: 22px; color: var(--ink); letter-spacing: 1px; }
.modal-author { margin: 0 0 12px; font-size: 13px; color: var(--ink-light); }
.modal-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.meta-tag {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(185, 138, 78, 0.13);
  color: var(--accent-deep);
  font-weight: 600;
}
html[data-theme="dark"] .meta-tag { color: var(--accent); }
.modal-desc {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink);
  opacity: 0.9;
  flex: 1;
}
.modal-rating { font-size: 15px; color: #d9a33d; letter-spacing: 2px; margin-bottom: 16px; }
.modal-rating .rating-num { color: var(--ink-light); font-size: 13px; margin-left: 8px; letter-spacing: 0; }

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border-top: 1px dashed var(--panel-border);
  padding-top: 14px;
}
.status-cycle { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.status-label { font-size: 12px; color: var(--ink-light); }
.status-btn { padding: 4px 12px; font-size: 12px; }
.modal-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
#modal-fav.faved { background: #e8a33d; border-color: #e8a33d; color: #fff; }

/* ---------------- Toast ---------------- */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(40, 28, 14, 0.92);
  color: #f3e6cc;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  z-index: 200;
  animation: toastIn 0.3s ease;
}
@keyframes toastIn { from { opacity: 0; transform: translate(-50%, 10px); } to { opacity: 1; transform: translate(-50%, 0); } }

/* ---------------- 页脚 ---------------- */
.shelf-footer {
  margin-top: 18px;
  text-align: center;
  font-size: 13px;
  color: var(--ink-light);
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 640px) {
  .shelf-page { padding: 16px 10px 28px; }
  .shelf-stage { padding: 20px 12px 24px; }
  .shelf-title { font-size: 19px; }
  .modal-card { flex-direction: column; align-items: center; text-align: center; padding: 24px 20px; }
  .modal-cover { flex: 0 0 auto; }
  .modal-actions { justify-content: center; }
  .grid-area { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
  .spine-title { font-size: 10px; }
  .file-row { grid-template-columns: 1fr 1fr; }
  .fr-newcat { grid-column: 1 / 3; }
}

/* ============================================================
   v6 新增组件：空书架 / 添加书籍 / 编辑表单 / PDF 阅读器
   ============================================================ */

.reader[hidden], .modal-mask[hidden] { display: none !important; }

/* ---------------- 空书架引导 ---------------- */
.empty-library {
  padding: 56px 20px 64px;
  text-align: center;
  color: var(--ink);
}
.el-emoji { font-size: 58px; margin-bottom: 10px; }
.empty-library h2 { margin: 0 0 8px; font-size: 20px; letter-spacing: 2px; }
.empty-library p { margin: 0 0 18px; font-size: 14px; color: var(--ink-light); }
.el-btn { font-size: 15px; padding: 10px 28px; }
.el-hint { margin-top: 14px !important; font-size: 12px !important; opacity: 0.75; }

/* ---------------- 添加书籍弹窗 ---------------- */
.add-card { max-width: 680px; flex-direction: column; gap: 14px; }
.add-title { margin: 0; font-size: 20px; letter-spacing: 1px; color: var(--ink); }
.add-sub { margin: 2px 0 0; font-size: 13px; color: var(--ink-light); }

.dropzone {
  border: 2px dashed var(--accent);
  border-radius: 14px;
  padding: 26px 16px;
  text-align: center;
  cursor: pointer;
  background: var(--bg-1);
  transition: all 0.2s;
}
.dropzone:hover, .dropzone.drag-over {
  background: rgba(185, 138, 78, 0.12);
  border-color: var(--accent-deep);
}
.dz-icon { font-size: 34px; }
.dz-main { margin: 6px 0 2px; font-weight: 700; color: var(--ink-mid); }
.dz-hint { margin: 0; font-size: 12px; color: var(--ink-light); }

.add-files {
  max-height: 42vh;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-right: 4px;
}

.file-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr 1fr auto;
  gap: 8px;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--bg-1);
}
html[data-theme="dark"] .file-row { background: rgba(0, 0, 0, 0.25); }
.fr-name { display: flex; flex-direction: column; min-width: 0; }
.fr-fname {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fr-fsize { font-size: 11px; color: var(--ink-light); }
.fr-input {
  padding: 7px 10px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  min-width: 0;
}
.fr-input:focus { border-color: var(--accent); }
.fr-newcat { grid-column: 3 / 5; }
.fr-del {
  border: none;
  background: transparent;
  color: var(--ink-light);
  font-size: 14px;
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  transition: all 0.2s;
}
.fr-del:hover { color: #b3572f; background: rgba(179, 87, 47, 0.12); }

.add-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  border-top: 1px dashed var(--panel-border);
  padding-top: 14px;
}
.add-meta-actions, .add-confirm { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------------- 详情弹窗：编辑模式 ---------------- */
.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}
.field span { font-size: 12px; color: var(--ink-light); }
.field input, .field select, .field textarea {
  padding: 8px 12px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--ink);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  resize: vertical;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); }

.modal-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
#modal-del.armed { color: #fff; background: #b3572f; border-color: #b3572f; }

/* ---------------- PDF 阅读器 ---------------- */
.reader {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: #232323;
  display: flex;
  flex-direction: column;
  animation: maskIn 0.2s ease;
}
.reader-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 16px;
  background: #33302c;
  color: #f0e6d2;
  flex: 0 0 auto;
}
.reader-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#reader-close {
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: transparent;
  color: #f0e6d2;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  flex: 0 0 auto;
}
#reader-close:hover { background: rgba(255, 255, 255, 0.15); }
#reader-frame {
  flex: 1;
  width: 100%;
  border: none;
  background: #fff;
}


/* ============ 分类书架（追加部分） ============ */
.shelf-block {
  margin-bottom: 30px;
}
.shelf-block:last-child {
  margin-bottom: 0;
}
.shelf-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 4px 8px;
  border-bottom: 1px solid rgba(122, 90, 55, 0.18);
  margin-bottom: 8px;
}
.shelf-block-name {
  font-size: 15px;
  font-weight: 700;
  color: #5c4429;
  letter-spacing: 1px;
}
.shelf-block-count {
  font-size: 12px;
  color: #9a835f;
  background: rgba(185, 138, 78, 0.16);
  padding: 2px 10px;
  border-radius: 999px;
}
.shelf-block-body {
  width: 100%;
}
[data-theme="dark"] .shelf-block-name {
  color: #e6d7c0;
}
[data-theme="dark"] .shelf-block-header {
  border-color: rgba(255, 255, 255, 0.12);
}
[data-theme="dark"] .shelf-block-count {
  background: rgba(255, 255, 255, 0.12);
  color: #b9a585;
}