/* ============================================================
   style.css —— 全局样式（主题化重构版）
   配色 / 圆角 / 阴影 / 间距 全部走 CSS 变量；
   亮色为默认，[data-theme="dark"] 覆盖为暗色。
   ============================================================ */
:root {
  /* ===== 星夜紫主题（林间书屋）=====
     深紫 + 星光蓝 + 樱粉点缀 + 银白：梦幻夜空的动漫感。
     所有组件都只读这里的变量，换肤只改这一处。 */
  --c-primary: #534ab7;
  --grad: linear-gradient(135deg, #534ab7 0%, #85b7eb 100%);
  --grad-soft: linear-gradient(135deg, #eeedfe 0%, #e6f1fb 100%);
  --bg: #f4f3fb;
  --surface: #ffffff;
  --surface-2: #eeedfe;
  --surface-3: #f6f5fe;
  --border: #e0def8;
  --border-strong: #cbc7f2;
  --text: #26215c;
  --text-2: #5f5a85;
  --text-3: #8e88ae;
  --accent: #d4537e;
  --ok: #0f6e56;
  --warn: #854f0b;
  --err: #a32d2d;
  --sidebar-1: #3c3489;
  --sidebar-2: #26215c;
  --shadow: 0 6px 22px rgba(83, 74, 183, .14);
  --shadow-sm: 0 2px 10px rgba(83, 74, 183, .1);
  --shadow-hover: 0 14px 34px rgba(83, 74, 183, .3);
  /* 玻璃拟态：半透明底 + 高光描边 */
  --glass-bg: rgba(255, 255, 255, .62);
  --glass-bg-2: rgba(255, 255, 255, .48);
  --glass-brd: rgba(255, 255, 255, .8);
  --glass-brd-2: rgba(83, 74, 183, .16);
  --glass-blur: blur(14px) saturate(1.4);
  --r: 16px;
  --r-sm: 12px;
  --r-lg: 24px;
  --r-pill: 999px;
  --t: .22s cubic-bezier(.4, 0, .2, 1);
}
[data-theme="dark"] {
  /* 暗色版：真正入夜的星空，紫蓝更沉、樱粉更亮 */
  --c-primary: #afa9ec;
  --grad: linear-gradient(135deg, #7f77dd 0%, #d4537e 100%);
  --grad-soft: linear-gradient(135deg, #26215c 0%, #1a1740 100%);
  --bg: #12102a;
  --surface: #1c1938;
  --surface-2: #262149;
  --surface-3: #221e42;
  --border: #362f63;
  --border-strong: #4a4180;
  --text: #eceafa;
  --text-2: #b3ade0;
  --text-3: #827cb0;
  --accent: #ed93b1;
  --sidebar-1: #26215c;
  --sidebar-2: #161338;
  --shadow: 0 8px 26px rgba(0, 0, 0, .45);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, .35);
  --shadow-hover: 0 14px 34px rgba(127, 119, 221, .32);
  --glass-bg: rgba(38, 33, 73, .58);
  --glass-bg-2: rgba(28, 25, 56, .5);
  --glass-brd: rgba(175, 169, 236, .22);
  --glass-brd-2: rgba(175, 169, 236, .26);
  --glass-blur: blur(16px) saturate(1.5);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px;
  transition: background var(--t), color var(--t);
}
.hidden { display: none !important; }

/* ---------- 主题切换按钮（浮动右上） ---------- */
.theme-toggle {
  position: fixed; top: 16px; right: 18px; z-index: 200;
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 18px; cursor: pointer; box-shadow: var(--shadow-sm);
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--t), box-shadow var(--t), background var(--t);
}
.theme-toggle:hover { transform: rotate(-12deg) scale(1.06); box-shadow: var(--shadow-hover); }

/* ---------- 登录页 ---------- */
.login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--grad-soft); padding: 20px;
  transition: background var(--t);
}
.login-card {
  position: relative; background: var(--surface); padding: 38px 36px 34px; width: 380px;
  border-radius: var(--r-lg); box-shadow: var(--shadow); overflow: hidden;
  animation: pop .4s cubic-bezier(.2, .8, .3, 1);
}
.login-card::before {
  content: ""; position: absolute; left: 0; top: 0; right: 0; height: 6px; background: var(--grad);
}
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(.98); } to { opacity: 1; transform: none; } }
.login-card h1 { font-size: 23px; margin-bottom: 6px; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.login-sub { color: var(--text-2); margin-bottom: 22px; font-size: 13px; }
.login-card label { display: block; margin: 12px 0 6px; color: var(--text-2); font-size: 13px; }
.login-card input {
  width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: var(--r-sm);
  font-size: 14px; background: var(--surface-3); color: var(--text); transition: border var(--t), box-shadow var(--t);
}
.login-card input:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(91, 124, 250, .18); }
.error-text { color: var(--err); margin-top: 12px; min-height: 20px; font-size: 13px; }
.tip { color: var(--text-3); font-size: 12px; margin-top: 14px; }

.bg-blue { background: rgba(25, 103, 210, .12); color: #1967d2; }
.badge.blue { background: rgba(25, 103, 210, .14); color: #2f80ed; }
.nav-badge {
  display: inline-block; margin-left: 6px; padding: 0 6px; min-width: 16px; line-height: 16px;
  border-radius: 8px; background: var(--err); color: #fff; font-size: 11px; text-align: center;
}
.reject-note { margin-top: 4px; font-size: 12px; color: var(--err); }
.req-line { font-size: 14px; line-height: 1.9; color: var(--text); }
.req-line b { font-size: 15px; }
.req-sub { color: var(--text-3); font-size: 12px; }
.req-warn { margin-top: 10px; padding: 8px 10px; border-radius: var(--r-sm); background: rgba(217, 48, 37, .1); color: var(--err); font-size: 13px; line-height: 1.6; }
.modal-input { width: 100%; padding: 8px 10px; margin: 6px 0 4px; border: 1px solid var(--border); border-radius: var(--r-sm); font-size: 14px; background: var(--surface-3); color: var(--text); }
.switch-line { margin-top: 10px; text-align: center; font-size: 13px; color: var(--text-2); }
.switch-line a { color: var(--c-primary); text-decoration: none; font-weight: 500; }
.switch-line a:hover { text-decoration: underline; }

/* ---------- 布局 ---------- */
#appView, #readerView { display: flex; min-height: 100vh; }
.sidebar {
  width: 200px; background: linear-gradient(180deg, var(--sidebar-1), var(--sidebar-2));
  color: #fff; display: flex; flex-direction: column; transition: background var(--t);
}
.brand { padding: 20px; font-size: 17px; font-weight: bold; border-bottom: 1px solid rgba(255, 255, 255, .08); display: flex; align-items: center; gap: 8px; }
.brand::before { content: "📚"; }
.sidebar nav { flex: 1; padding: 12px 0; }
.nav-item {
  display: block; width: 100%; padding: 12px 20px; background: none; border: none;
  color: #b8c4ce; text-align: left; font-size: 14px; cursor: pointer; transition: color var(--t), background var(--t);
}
.nav-item:hover { background: rgba(255, 255, 255, .08); color: #fff; }
.nav-item.active { background: var(--grad); color: #fff; box-shadow: 0 6px 16px rgba(91, 124, 250, .4); }
.sidebar-foot { padding: 16px; border-top: 1px solid rgba(255, 255, 255, .08); font-size: 12px; color: #9fb0bf; }
.sidebar-foot .btn { margin-top: 8px; width: 100%; }

.main { flex: 1; padding: 24px; overflow-x: auto; }
.tab-page h2 { font-size: 20px; margin-bottom: 16px; }

/* ---------- 概览卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; margin-bottom: 20px; }
.card {
  background: var(--surface); border-radius: var(--r); padding: 18px; box-shadow: var(--shadow-sm);
  transition: transform var(--t), box-shadow var(--t);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card .num { font-size: 26px; font-weight: bold; color: var(--c-primary); }
.card .label { color: var(--text-2); font-size: 13px; margin-top: 4px; }
.card.warn .num { color: var(--warn); }
.card.ok .num { color: var(--ok); }

.panel { background: var(--surface); border-radius: var(--r); padding: 18px; margin-bottom: 16px; box-shadow: var(--shadow-sm); transition: box-shadow var(--t); }
.panel:hover { box-shadow: var(--shadow); }
.panel h3 { font-size: 15px; margin-bottom: 14px; }
.bars .bar-row { display: flex; align-items: center; margin-bottom: 8px; font-size: 13px; }
.bars .bar-name { width: 90px; color: var(--text-2); }
.bars .bar-track { flex: 1; background: var(--surface-2); height: 16px; border-radius: 8px; overflow: hidden; }
.bars .bar-fill { height: 100%; background: var(--grad); border-radius: 8px; }
.bars .bar-val { width: 50px; text-align: right; color: var(--text-2); }
.recent .row { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 13px; color: var(--text-2); }
.recent .row:last-child { border: none; }

/* ---------- 工具栏与表格 ---------- */
.toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.toolbar h2 { margin: 0; }
.grow { flex: 1; }
.search, .toolbar select, .modal-box input, .modal-box select {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: var(--r-sm); font-size: 13px;
  background: var(--surface-3); color: var(--text); transition: border var(--t), box-shadow var(--t);
}
.search:focus, .toolbar select:focus, .modal-box input:focus, .modal-box select:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(91, 124, 250, .15); }
.search { width: 220px; }

/* ---------- 书城 ---------- */
.mall-bar {
  position: sticky; top: 0; z-index: 30; background: var(--bg);
  padding: 10px 0 14px; margin-bottom: 14px; border-bottom: 1px solid var(--border);
  transition: background var(--t), border-color var(--t);
}
.mall-head { display: flex; align-items: center; gap: 14px; }
.mall-logo { font-size: 18px; font-weight: bold; color: var(--text); white-space: nowrap; }
.mall-search { display: flex; align-items: center; gap: 10px; flex: 1; position: relative; }
.search.mall-input { width: auto; flex: 1; max-width: 460px; padding: 11px 14px; font-size: 14px; border-radius: var(--r-pill); }
.mall-filter-right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.suggest-box {
  position: absolute; left: 0; right: 0; top: 100%; margin-top: 6px; z-index: 40;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  box-shadow: var(--shadow); overflow: hidden;
}
.suggest-box .sg-item { padding: 11px 14px; cursor: pointer; font-size: 14px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.suggest-box .sg-item:last-child { border-bottom: none; }
.suggest-box .sg-item:hover { background: var(--grad-soft); }
.suggest-box .sg-item .sg-author { color: var(--text-3); font-size: 12px; margin-left: 8px; }

/* 搜索页：必须用 fixed 铺满视口。
   以前用 absolute，它会跟着页面内容一起滚动，往下划就露出下面的页面。
   左边留出 200px 给侧边栏，保证侧栏一直可见、能点，不会被盖住。 */
.search-screen {
  position: fixed; left: 200px; right: 0; top: 0; bottom: 0; z-index: 25;
  background: var(--bg); overflow-y: auto; padding: 16px; transition: background var(--t);
}
.ss-block { margin-bottom: 18px; }
.ss-block:last-child { margin-bottom: 0; }
.ss-title { font-size: 15px; font-weight: bold; color: var(--text); margin-bottom: 10px; }
.ss-title .link { float: right; font-weight: normal; font-size: 13px; }
.ss-history { display: flex; flex-wrap: wrap; gap: 8px; }
.ss-history .ss-chip { padding: 6px 12px; background: var(--surface-2); border-radius: var(--r-pill); font-size: 13px; cursor: pointer; color: var(--text-2); transition: var(--t); }
.ss-history .ss-chip:hover { background: var(--surface-3); color: var(--text); transform: translateY(-1px); }
.ss-history .ss-empty { color: var(--text-3); font-size: 13px; }
.ss-catrank { display: flex; flex-direction: column; gap: 14px; }
.ss-cat-name { font-size: 13px; color: var(--text-2); margin-bottom: 6px; font-weight: bold; }
.ss-cat-row { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; }
.ss-cat-row .ss-book { flex: 0 0 auto; width: 150px; padding: 8px 10px; background: var(--surface-2); border-radius: var(--r-sm); font-size: 13px; cursor: pointer; transition: var(--t); }
.ss-cat-row .ss-book:hover { background: var(--surface-3); transform: translateY(-2px); }
.ss-cat-row .ss-book .ss-b-author { color: var(--text-3); font-size: 12px; margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 8 个榜单 */
.mall-rankings { display: flex; gap: 14px; overflow-x: auto; padding-bottom: 10px; margin-bottom: 18px; }
.mall-rankings.hidden { display: none; }
.rank-card { flex: 0 0 320px; background: var(--surface); border-radius: var(--r); padding: 12px; box-shadow: var(--shadow-sm); transition: transform var(--t), box-shadow var(--t); }
.rank-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.rank-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.rank-name { font-size: 15px; font-weight: bold; color: var(--text); }
.rank-more { font-size: 13px; color: var(--c-primary); cursor: pointer; }
.rank-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.rank-cell { background: var(--surface-2); border-radius: var(--r-sm); padding: 8px; font-size: 12px; cursor: pointer; line-height: 1.4; min-height: 52px; display: flex; align-items: center; transition: var(--t); }
.rank-cell:hover { background: var(--surface-3); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.rank-cell .rk-idx { color: var(--accent); font-weight: bold; margin-right: 4px; }
.rank-cell .rk-title { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-cell .rk-author { color: var(--text-3); font-size: 11px; }

.full-rank-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; max-height: 70vh; overflow-y: auto; margin-top: 10px; }
.full-rank-list .fr-item { padding: 10px; background: var(--surface-2); border-radius: var(--r-sm); cursor: pointer; font-size: 13px; transition: var(--t); }
.full-rank-list .fr-item:hover { background: var(--surface-3); transform: translateY(-2px); }
.full-rank-list .fr-item .fr-idx { color: var(--accent); font-weight: bold; margin-right: 6px; }
.full-rank-list .fr-item .fr-author { color: var(--text-3); font-size: 12px; margin-left: 6px; }
.all-books-title { font-size: 16px; margin: 4px 0 12px; color: var(--text); }

/* 表格（管理端 / 我的借阅等仍用表格） */
.table-wrap { background: var(--surface); border-radius: var(--r); overflow: hidden; box-shadow: var(--shadow-sm); overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 760px; }
th, td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--surface-2); color: var(--text-2); font-weight: 600; }
tbody tr { transition: background var(--t); }
tbody tr:hover { background: var(--surface-3); }
td.empty { text-align: center; color: var(--text-3); padding: 30px; }

.badge { display: inline-block; padding: 2px 9px; border-radius: var(--r-pill); font-size: 12px; }
.badge.green { background: rgba(30, 142, 62, .14); color: #2ea44f; }
.badge.red { background: rgba(217, 48, 37, .14); color: #f05545; }
.badge.blue { background: rgba(25, 103, 210, .14); color: #4a9eff; }
.badge.gray { background: var(--surface-2); color: var(--text-2); }
.badge.shelf { background: var(--surface-2); color: #47606e; font-family: Consolas, Monaco, monospace; font-weight: bold; letter-spacing: .5px; }

/* ---------- 书城：封面卡片墙 ---------- */
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 16px; padding: 2px; }
.book-card {
  background: var(--surface); border-radius: var(--r); overflow: hidden; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; cursor: pointer; position: relative;
  transition: transform var(--t), box-shadow var(--t);
}
.book-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.bc-cover { position: relative; aspect-ratio: 3 / 4; background: var(--surface-2); overflow: hidden; display: flex; align-items: center; justify-content: center; }
.bc-cover .book-cover-thumb { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t); }
.book-card:hover .bc-cover .book-cover-thumb { transform: scale(1.06); }
.bc-cover .book-cover-ph { width: 100%; height: 100%; border-radius: 0; font-size: 34px; }
.bc-badge {
  position: absolute; top: 8px; right: 8px; padding: 2px 8px; border-radius: var(--r-pill);
  font-size: 11px; font-weight: 600; color: #fff; backdrop-filter: blur(2px);
}
.bc-badge.in { background: rgba(30, 142, 62, .9); }
.bc-badge.out { background: rgba(120, 130, 145, .9); }
.bc-body { padding: 10px 12px 4px; flex: 1; }
.bc-title { font-size: 14px; font-weight: 600; color: var(--text); line-height: 1.35; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bc-author { font-size: 12px; color: var(--text-2); margin-top: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bc-cat { display: inline-block; margin-top: 6px; font-size: 11px; color: var(--accent); background: var(--grad-soft); padding: 1px 8px; border-radius: var(--r-pill); }
.bc-actions { display: flex; gap: 8px; padding: 10px 12px 12px; }
.bc-actions .btn { flex: 1; justify-content: center; }
.empty-grid { grid-column: 1 / -1; text-align: center; color: var(--text-3); padding: 40px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 4px;
  padding: 8px 14px; border: 1px solid var(--border); background: var(--surface); border-radius: var(--r-sm);
  cursor: pointer; font-size: 13px; color: var(--text); transition: var(--t);
}
.btn:hover { border-color: var(--c-primary); color: var(--c-primary); transform: translateY(-1px); }
.btn.primary { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 4px 12px rgba(91, 124, 250, .3); }
.btn.primary:hover { color: #fff; filter: brightness(1.06); transform: translateY(-1px); }
.btn.danger { color: var(--err); border-color: rgba(217, 48, 37, .4); }
.btn.danger:hover { background: var(--err); color: #fff; border-color: var(--err); }
.btn.tiny { padding: 6px 10px; font-size: 12px; }
.btn.block { width: 100%; margin-top: 18px; padding: 11px; font-size: 15px; }
.link { color: var(--c-primary); cursor: pointer; margin-right: 10px; }
.link.danger { color: var(--err); }

/* ---------- 分页 ---------- */
.pager { margin-top: 14px; display: flex; gap: 8px; align-items: center; font-size: 13px; color: var(--text-2); flex-wrap: wrap; }
.pager-info { color: var(--text-3); }
.pager-nav { min-width: 30px; height: 30px; padding: 0; line-height: 1; border: 1px solid var(--border); background: var(--surface); border-radius: var(--r-sm); cursor: pointer; font-size: 15px; color: var(--text); transition: var(--t); }
.pager-nav:hover:not([disabled]) { border-color: var(--c-primary); color: var(--c-primary); }
.pager-nav[disabled] { opacity: .4; cursor: not-allowed; }
.pager-pos { min-width: 46px; text-align: center; font-variant-numeric: tabular-nums; color: var(--text); }

/* ---------- 身份切换 ---------- */
.role-switch { display: flex; gap: 0; margin: 16px 0 4px; border: 1px solid var(--border); border-radius: var(--r-pill); overflow: hidden; }
.role-btn { flex: 1; padding: 10px 0; border: none; background: var(--surface); color: var(--text-2); font-size: 14px; cursor: pointer; transition: var(--t); }
.role-btn + .role-btn { border-left: 1px solid var(--border); }
.role-btn.active { background: var(--grad); color: #fff; }

/* ---------- 读者端：筛选工具栏 ---------- */
.toolbar-sub { margin-top: -4px; margin-bottom: 12px; }
.toolbar-sub .filter-label { font-size: 13px; color: var(--text-2); }
.toolbar-sub input[type="date"] { padding: 8px 10px; border: 1px solid var(--border); border-radius: var(--r-sm); font-size: 13px; background: var(--surface-3); color: var(--text); }

/* ---------- 弹窗 ---------- */
.modal { position: fixed; inset: 0; background: rgba(15, 20, 30, .5); backdrop-filter: blur(3px); display: flex; align-items: center; justify-content: center; z-index: 50; animation: fade .2s ease; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal-box { background: var(--surface); border-radius: var(--r-lg); padding: 24px; width: 440px; max-width: 92vw; max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow); animation: pop .28s cubic-bezier(.2, .8, .3, 1); }
.modal-box h3 { margin-bottom: 16px; font-size: 17px; color: var(--text); }
.modal-box label { display: block; margin: 10px 0 5px; color: var(--text-2); font-size: 13px; }
.modal-box input, .modal-box select { width: 100%; padding: 9px 10px; border: 1px solid var(--border); border-radius: var(--r-sm); background: var(--surface-3); color: var(--text); }
.modal-foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

.confirm-box { width: 380px; }
.confirm-text { color: var(--text-2); font-size: 13px; line-height: 1.7; margin-bottom: 4px; }
.req-modal-box { position: relative; }
.req-overlay { position: absolute; inset: 0; z-index: 5; background: var(--surface); border-radius: var(--r-lg); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 24px; }
.req-overlay .confirm-text { max-width: 320px; font-size: 14px; }
.field-hint { color: var(--text-3); font-size: 12px; margin: 4px 0 0; line-height: 1.5; }

/* ---------- 提示条 ---------- */
.toast { position: fixed; top: 20px; left: 50%; transform: translateX(-50%); background: var(--sidebar-2); color: #fff; padding: 12px 22px; border-radius: var(--r-pill); z-index: 99; font-size: 14px; box-shadow: var(--shadow); }
.toast.success { background: var(--ok); }
.toast.error { background: var(--err); }

.ss-bar { margin-bottom: 12px; }

/* ---------- 图书详情弹窗 ---------- */
.book-detail-box { width: 480px; }
.bd-meta { margin-bottom: 4px; }
.bd-row { display: flex; align-items: flex-start; padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.bd-k { width: 92px; flex: none; color: var(--text-2); }
.bd-v { flex: 1; color: var(--text); }
.bd-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 2px; }
.tag-chip { padding: 4px 10px; background: var(--grad-soft); border-radius: var(--r-pill); font-size: 12px; color: var(--accent); }
.bd-desc-label { font-size: 13px; color: var(--text-2); margin: 14px 0 6px; }
.bd-desc { background: var(--surface-3); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 12px; font-size: 14px; line-height: 1.8; color: var(--text); max-height: 240px; overflow-y: auto; white-space: pre-wrap; }

/* ---------- 图书封面（通用） ---------- */
.bd-cover { width: 120px; height: 168px; object-fit: cover; border-radius: var(--r-sm); margin: 4px 0 12px; border: 1px solid var(--border); background: var(--surface-2); display: block; }
.book-cover-thumb { width: 42px; height: 58px; object-fit: cover; border-radius: 4px; background: var(--surface-2); flex: none; display: block; }
.book-cover-ph { width: 42px; height: 58px; border-radius: 4px; background: var(--grad); color: #fff; font-size: 20px; font-weight: bold; display: flex; align-items: center; justify-content: center; flex: none; }
.cov-cell { width: 46px; text-align: center; vertical-align: middle; padding: 4px 2px; }
.due-bad { color: var(--err); font-weight: bold; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .mall-rankings { flex-wrap: nowrap; }
  .full-rank-list { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  #appView, #readerView { flex-direction: column; }
  /* 窄屏侧栏变成顶部横条，搜索页改为从顶栏下方开始，同样保留左侧栏 */
  .search-screen { left: 0; top: 52px; }
  .sidebar { width: 100%; flex-direction: row; align-items: center; padding: 0 10px; }
  .brand { border-bottom: none; border-right: 1px solid rgba(255, 255, 255, .08); padding: 12px 14px; }
  .sidebar nav { display: flex; flex: 1; padding: 0; overflow-x: auto; }
  .nav-item { width: auto; white-space: nowrap; padding: 12px 14px; }
  .nav-item.active { box-shadow: none; }
  .sidebar-foot { border-top: none; border-left: 1px solid rgba(255, 255, 255, .08); display: flex; align-items: center; gap: 8px; padding: 0 10px; }
  .sidebar-foot .btn { margin-top: 0; width: auto; }
  .main { padding: 16px; }
  .mall-head { flex-wrap: wrap; }
  .mall-search { flex-wrap: wrap; }
  .search.mall-input { max-width: none; }
  .mall-filter-right { width: 100%; }
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
}
@media (max-width: 560px) {
  .login-card { width: 100%; max-width: 360px; padding: 30px 22px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .full-rank-list { grid-template-columns: 1fr; }
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 10px; }
  .bc-title { font-size: 13px; }
  .bc-actions { flex-direction: column; }
  .toolbar { gap: 8px; }
}

/* ---------- 书城顶部 Banner 横幅 ---------- */
.mall-banner { display: flex; align-items: center; justify-content: space-between; background: var(--grad); color: #fff; border-radius: var(--r-lg); padding: 22px 26px; margin-bottom: 18px; box-shadow: var(--shadow); position: relative; overflow: hidden; }
.mall-banner::after { content: ""; position: absolute; right: -30px; top: -30px; width: 160px; height: 160px; border-radius: 50%; background: rgba(255, 255, 255, .12); }
.mall-banner h2 { font-size: 22px; margin-bottom: 6px; }
.mall-banner p { font-size: 13px; opacity: .92; }
.mb-deco { font-size: 46px; filter: drop-shadow(0 4px 8px rgba(0, 0, 0, .2)); }

/* ---------- 封面骨架屏 / 异步封面容器 ---------- */
.lazy-cover { position: relative; width: 100%; height: 100%; overflow: hidden; background: var(--surface-2); }
.cover-skeleton { position: absolute; inset: 0; background: linear-gradient(100deg, var(--surface-2) 30%, var(--surface-3) 50%, var(--surface-2) 70%); background-size: 200% 100%; animation: shimmer 1.2s linear infinite; }
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }
.lazy-cover .book-cover-thumb { width: 100%; height: 100%; object-fit: cover; display: block; }
.lazy-cover .book-cover-ph { width: 100%; height: 100%; border-radius: 0; }
.bc-cover .lazy-cover { height: 100%; }
/* 榜单里封面保持小缩略图 */
.rank-cell .lazy-cover { width: 40px; height: 56px; flex: none; border-radius: 4px; }
.rank-cell .lazy-cover .book-cover-thumb,
.rank-cell .lazy-cover .book-cover-ph { width: 40px; height: 56px; border-radius: 4px; font-size: 18px; }

/* ---------- 详情弹窗封面 ---------- */
.bd-cover-wrap { width: 120px; height: 168px; border-radius: var(--r-sm); margin: 4px 0 12px; border: 1px solid var(--border); background: var(--surface-2); overflow: hidden; position: relative; }
.bd-cover-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.book-cover-ph.large { width: 120px; height: 168px; border-radius: var(--r-sm); font-size: 40px; }


/* ============================================================
   动漫主题补充样式（樱花季粉）
   1. 樱花飘落  2. 吉祥物与空状态
   3. 贴纸风卡片  4. 登录页重做
   5. 管理端美化  6. 还书提醒分级配色
   ============================================================ */

/* ---------- 1. 樱花飘落 ---------- */
.sakura-layer { position: fixed; inset: 0; pointer-events: none; z-index: 1; overflow: hidden; display: none; }
body.sakura-on .sakura-layer { display: block; }
.petal {
  position: absolute; top: -40px;
  background: #f9b8ce;
  border-radius: 62% 38% 56% 44% / 48% 56% 44% 52%;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .55);
  animation-name: petal-fall;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
@keyframes petal-fall {
  0%   { transform: translateY(0) translateX(0) rotate(0deg); }
  50%  { transform: translateY(52vh) translateX(28px) rotate(180deg); }
  100% { transform: translateY(108vh) translateX(-18px) rotate(360deg); }
}
.sakura-toggle {
  position: fixed; top: 68px; right: 18px; z-index: 200;
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface); color: var(--accent);
  font-size: 15px; cursor: pointer; box-shadow: var(--shadow-sm);
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--t), box-shadow var(--t);
}
.sakura-toggle:hover { transform: scale(1.08); box-shadow: var(--shadow); }

/* ---------- 2. 吉祥物与空状态 ---------- */
.mascot-owl { width: 120px; height: 120px; animation: owl-float 3.6s ease-in-out infinite; }
@keyframes owl-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-7px); }
}
.mascot-empty { padding: 34px 16px; text-align: center; color: var(--text-2); }
.mascot-empty .me-title { margin-top: 10px; font-size: 15px; color: var(--text); font-weight: 500; }
.mascot-empty .me-sub { margin-top: 6px; font-size: 13px; color: var(--text-3); }
.empty-grid { padding: 20px; text-align: center; color: var(--text-2); }

/* ---------- 3. 贴纸风卡片（粗描边 + hover 微微倾斜弹起） ---------- */
.book-card {
  border: 2px solid var(--border-strong);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: transform .25s cubic-bezier(.34, 1.4, .64, 1), box-shadow var(--t), border-color var(--t);
}
.book-card:hover {
  transform: translateY(-7px) rotate(-1.3deg);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.book-card .bc-cover img, .book-card .bc-cover .book-cover-ph { border-radius: 12px; }
.bc-cover { overflow: hidden; }
.book-card:hover .bc-cover img { transform: scale(1.06); }
.bc-cover img { transition: transform var(--t); }
/* 糖果按钮 */
.btn, .btn.tiny {
  border-radius: var(--r-pill);
  border: 2px solid var(--border-strong);
  transition: transform .18s cubic-bezier(.34, 1.4, .64, 1), box-shadow var(--t), background var(--t);
}
.btn:hover:not(:disabled) { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn.primary { border-color: transparent; }
.btn:active:not(:disabled) { transform: translateY(0) scale(.97); }
/* 榜单卡片贴纸化 */
.rank-cell, .rk-card {
  border-radius: 16px;
  border: 2px solid var(--border-strong);
  transition: transform .2s cubic-bezier(.34, 1.4, .64, 1), border-color var(--t), box-shadow var(--t);
}
.rank-cell:hover, .rk-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--shadow-hover); }

/* ---------- 4. 登录页重做 ---------- */
.login-wrap {
  background:
    radial-gradient(1200px 400px at 50% -10%, #ffe3ee 0%, transparent 60%),
    var(--bg);
}
.login-card {
  border-radius: 26px;
  border: 2px solid var(--border-strong);
  box-shadow: var(--shadow-hover);
  padding-top: 8px;
}
.login-hero { text-align: center; margin-bottom: 6px; }
.login-hero .mascot-owl { width: 104px; height: 104px; }
.login-bubble {
  display: inline-block; position: relative;
  background: var(--grad-soft); border: 2px solid var(--border-strong);
  border-radius: 16px; padding: 8px 14px; font-size: 13px; color: var(--text-2);
  margin-top: 4px;
}
.login-bubble::before {
  content: ""; position: absolute; top: -8px; left: 50%; transform: translateX(-50%);
  border-left: 7px solid transparent; border-right: 7px solid transparent;
  border-bottom: 8px solid var(--border-strong);
}
.role-btn { border-radius: var(--r-pill); border: 2px solid var(--border-strong); transition: transform .18s, background var(--t); }
.role-btn:hover { transform: translateY(-2px); }
.role-btn.active { border-color: transparent; background: var(--grad); color: #fff; }

/* ---------- 5. 管理端美化 ---------- */
table { border-collapse: separate; border-spacing: 0; overflow: hidden; border-radius: 14px; border: 1px solid var(--border); }
table th { background: var(--grad-soft); color: var(--text); font-weight: 500; border-bottom: 2px solid var(--border-strong); }
table td { border-bottom: 1px solid var(--border); }
table tbody tr:hover td { background: var(--surface-3); }
.cards > * { border-radius: 18px; border: 2px solid var(--border-strong); }
.nav-item { border-radius: 14px; margin: 4px 10px; transition: transform var(--t), background var(--t); }
.nav-item:hover { transform: translateX(3px); }
.nav-ico { width: 16px; height: 16px; vertical-align: -3px; margin-right: 7px; opacity: .9; }
.toolbar { padding: 12px; background: var(--surface-2); border-radius: 16px; border: 1px solid var(--border); }
.mall-banner { border-radius: 22px !important; }

/* ---------- 6. 还书提醒：按距到期天数分级 ---------- */
.due-badge {
  display: inline-block; padding: 2px 9px; border-radius: var(--r-pill);
  font-size: 12px; line-height: 1.7; white-space: nowrap;
}
.due-lv-overdue { background: #fdecec; color: #c62828; border: 1px solid #f3b8b8; font-weight: 600; }
.due-lv-today   { background: #fff2e0; color: #b45309; border: 1px solid #f4cf9a; font-weight: 600; }
.due-lv-urgent  { background: #fff7db; color: #92610a; border: 1px solid #edd391; }
.due-lv-soon    { background: #eef7e9; color: #3f7a1f; border: 1px solid #c6e0b4; }
.due-lv-safe    { background: var(--surface-2); color: var(--text-2); border: 1px solid var(--border); }
.due-lv-back    { color: var(--text-3); }
[data-theme="dark"] .due-lv-overdue { background: #3a1c1e; color: #ffb4b4; border-color: #6b2f32; }
[data-theme="dark"] .due-lv-today   { background: #3d2a12; color: #ffcf8f; border-color: #6d4a1c; }
[data-theme="dark"] .due-lv-urgent  { background: #332a10; color: #f0d68a; border-color: #5d4d1d; }
[data-theme="dark"] .due-lv-soon    { background: #1d2c16; color: #b9e39b; border-color: #35512a; }

/* ---------- 卡通书本占位封面 ---------- */
.book-cover-ph.doodle {
  background: var(--grad-soft);
  border: 2px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  padding: 5px; overflow: hidden;
}
.book-cover-ph.doodle svg { width: 100%; height: 100%; }


/* ============================================================
   星夜紫 · 林间书屋 —— 样式升级补丁
   ① 星光飘落  ② 玻璃拟态  ③ 排版呼吸感
   ④ 微交互动效  ⑤ 侧栏与顶栏重做
   ============================================================ */

/* ---------- ① 星光飘落：花瓣换成小星星 ---------- */
.sakura-layer i.star,
.sakura-layer i.petal {
  position: absolute; top: -6vh; border-radius: 0;
  background: linear-gradient(160deg, #fff6dc 0%, #fac775 100%);
  clip-path: polygon(50% 0%, 61% 34%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 34%);
  filter: drop-shadow(0 0 4px rgba(250, 199, 117, .7));
  animation-name: petal-fall;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
[data-theme="dark"] .sakura-layer i.star,
[data-theme="dark"] .sakura-layer i.petal {
  background: linear-gradient(160deg, #fdf3e3 0%, #fac775 100%);
  filter: drop-shadow(0 0 7px rgba(250, 199, 117, .95));
}

/* ---------- 夜空光晕：给玻璃拟态提供层次底色 ---------- */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(127, 119, 221, .26), transparent 60%),
    radial-gradient(760px 460px at 92% 4%, rgba(212, 83, 126, .16), transparent 62%),
    radial-gradient(760px 540px at 50% 108%, rgba(133, 183, 235, .22), transparent 60%);
  transition: background var(--t);
}
[data-theme="dark"] body::before {
  background:
    radial-gradient(900px 540px at 12% -8%, rgba(127, 119, 221, .38), transparent 62%),
    radial-gradient(760px 460px at 92% 4%, rgba(212, 83, 126, .26), transparent 64%),
    radial-gradient(760px 540px at 50% 108%, rgba(133, 183, 235, .22), transparent 62%);
}

/* ---------- ② 玻璃拟态：半透明 + 高光描边 ---------- */
.card, .panel, .table-wrap, .book-card, .modal-box, .login-card, .toolbar {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, .65);
}
[data-theme="dark"] .card,
[data-theme="dark"] .panel,
[data-theme="dark"] .table-wrap,
[data-theme="dark"] .book-card,
[data-theme="dark"] .modal-box,
[data-theme="dark"] .login-card,
[data-theme="dark"] .toolbar {
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, .07);
}
.modal { backdrop-filter: blur(6px); }

/* ---------- ③ 排版呼吸感：留白与字号层级 ---------- */
body { line-height: 1.68; }
.panel { padding: 22px 24px; margin-bottom: 20px; }
.panel h3 { font-size: 16px; margin-bottom: 16px; letter-spacing: .3px; }
.toolbar h2 { font-size: 20px; letter-spacing: .3px; }
.card { padding: 18px 20px; }
.card .num { font-size: 30px; letter-spacing: -.5px; }
.card .label { font-size: 13px; margin-top: 6px; }
table th, table td { padding: 12px 14px; }
.table-wrap { padding: 4px; }
.book-card { padding: 14px; }

/* ---------- ④ 微交互动效 ---------- */
@keyframes card-rise {
  from { opacity: 0; transform: translateY(14px) scale(.985); }
  to { opacity: 1; transform: none; }
}
.book-card, .card, .panel { animation: card-rise .5s cubic-bezier(.4, 0, .2, 1) both; }
.book-card:nth-child(2) { animation-delay: .05s; }
.book-card:nth-child(3) { animation-delay: .1s; }
.book-card:nth-child(4) { animation-delay: .15s; }
.book-card:nth-child(5) { animation-delay: .2s; }
.book-card:nth-child(n+6) { animation-delay: .25s; }

@keyframes heart-pop {
  0% { transform: scale(1); } 35% { transform: scale(1.32); }
  62% { transform: scale(.93); } 100% { transform: scale(1); }
}
[data-fav]:active, [data-borrow]:active { animation: heart-pop .42s ease; }
.btn:active { transform: translateY(1px) scale(.97); }
.btn:focus-visible, .nav-item:focus-visible {
  outline: 2px solid var(--c-primary); outline-offset: 2px;
}
.nav-item:active { transform: scale(.98); }
.toast {
  border-radius: var(--r-pill); padding: 11px 24px; top: 22px;
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  box-shadow: 0 12px 32px rgba(24, 21, 60, .3); font-weight: 500; letter-spacing: .3px;
}

/* ---------- ⑤ 侧栏与顶栏重做 ---------- */
.sidebar {
  background: linear-gradient(165deg, var(--sidebar-1) 0%, var(--sidebar-2) 100%);
  border-radius: 0 26px 26px 0;
  box-shadow: 6px 0 28px rgba(38, 33, 92, .28);
  border-right: 1px solid rgba(255, 255, 255, .09);
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-size: 16px; letter-spacing: .8px; font-weight: 500;
}
.brand svg { width: 27px; height: 27px; flex: none; }
.nav-item { position: relative; }
.nav-item .nav-ico {
  width: 30px; height: 30px; padding: 6px; box-sizing: border-box;
  border-radius: 10px; background: rgba(255, 255, 255, .1);
  transition: background var(--t);
}
.nav-item:hover .nav-ico { background: rgba(255, 255, 255, .2); }
.nav-item.active .nav-ico { background: rgba(255, 255, 255, .3); }
.nav-item.active::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 4px; height: 58%; border-radius: 0 4px 4px 0; background: #fff;
  box-shadow: 0 0 12px rgba(255, 255, 255, .85);
}
.sidebar-foot .btn {
  border-radius: 14px; border-color: rgba(255, 255, 255, .22);
  background: rgba(255, 255, 255, .08); color: #fff;
}
.sidebar-foot .btn:hover { background: rgba(255, 255, 255, .18); color: #fff; }
.toolbar { padding: 14px 16px; border-radius: var(--r-lg); }

/* ---------- 窄屏：侧栏变顶栏时的对应调整 ---------- */
@media (max-width: 820px) {
  .sidebar {
    border-radius: 0 0 22px 22px;
    box-shadow: 0 6px 22px rgba(38, 33, 92, .26);
    border-right: none; border-bottom: 1px solid rgba(255, 255, 255, .09);
  }
  .nav-item.active::before {
    left: 50%; top: auto; bottom: 4px; transform: translateX(-50%);
    width: 40%; height: 3px; border-radius: 4px;
  }
  .brand svg { width: 22px; height: 22px; }
}


/* ---------- 筛选结果提示条 ---------- */
.filter-tag {
  display: inline-flex; align-items: center; gap: 10px; margin: 0 0 14px;
  padding: 7px 10px 7px 14px; border-radius: var(--r-pill); font-size: 13px;
  color: var(--text-2); background: var(--surface);
  border: 1px solid var(--glass-brd-2); box-shadow: var(--shadow-sm);
}
.filter-tag .ft-text strong { color: var(--c-primary); }
.filter-tag .ft-clear {
  border: none; background: transparent; cursor: pointer; font-size: 13px;
  color: var(--text-3); padding: 3px 9px; border-radius: var(--r-pill); transition: var(--t);
}
.filter-tag .ft-clear:hover { color: var(--c-primary); background: var(--surface-2); }

/* ---------- 搜索页修复：返回键加固 + 分类书榜卡片 ---------- */
.ss-bar {
  position: sticky; top: 0; z-index: 6; margin: -16px -16px 14px;
  padding: 14px 16px 12px;
  background: linear-gradient(var(--bg) 72%, rgba(244, 243, 251, 0));
}
[data-theme="dark"] .ss-bar { background: linear-gradient(var(--bg) 72%, rgba(18, 16, 42, 0)); }
#ssBack {
  font-size: 14px; padding: 9px 18px; border-radius: var(--r-pill);
  background: var(--surface); border: 1px solid var(--glass-brd);
  box-shadow: var(--shadow-sm); backdrop-filter: var(--glass-blur);
  transition: transform var(--t), color var(--t), border-color var(--t);
}
#ssBack:hover { color: var(--c-primary); border-color: var(--c-primary); transform: translateX(-3px); }
.ss-cat-block {
  padding: 12px 14px; border-radius: var(--r);
  background: var(--glass-bg); -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, .55);
}
[data-theme="dark"] .ss-cat-block { box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, .06); }
.ss-cat-row .ss-book {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-sm);
}
.ss-cat-row .ss-book:hover { border-color: var(--c-primary); }
.ss-cat-row .ss-book .ss-b-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }


/* ============================================================
   创新样式 ①②：星河动态背景 + 立体书 3D 卡片
   ============================================================ */
.star-canvas {
  position: fixed; inset: 0; z-index: -2; pointer-events: none; opacity: .95;
}
body:not(.sakura-on) .star-canvas { display: none; }

/* 立体书卡片：整体用 CSS 变量合成 transform，
   这样「鼠标跟手的倾斜」和「悬停上浮」不会互相覆盖 */
.book-card {
  position: relative; overflow: hidden;
  padding-left: 20px !important;
  transform-style: preserve-3d;
  transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg))
             translateY(var(--ty, 0px)) scale(var(--sc, 1));
  transition: transform .25s cubic-bezier(.4, 0, .2, 1), box-shadow var(--t);
}
.book-card:hover { --ty: -6px; box-shadow: var(--shadow-hover); }
.book-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 9px;
  background: var(--grad); border-radius: 12px 0 0 12px; opacity: .9;
}
.book-card::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: linear-gradient(105deg, transparent 32%, rgba(255, 255, 255, .5) 48%, transparent 64%);
  opacity: 0; transition: opacity .3s;
}
.book-card:hover::after { opacity: 1; animation: book-shine 1.1s ease; }
@keyframes book-shine {
  from { transform: translateX(-40%); }
  to { transform: translateX(40%); }
}
[data-theme="dark"] .book-card::after {
  background: linear-gradient(105deg, transparent 32%, rgba(255, 255, 255, .16) 48%, transparent 64%);
}


/* ============================================================
   创新样式 ③④：心情标签云 + 虚拟书架
   ============================================================ */
.all-books-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 22px 0 14px; }
.all-books-title { margin: 0 !important; }
.view-switch { display: flex; gap: 6px; }
.vs-btn.active { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 4px 12px rgba(83, 74, 183, .28); }

.mood-cloud {
  display: flex; align-items: center; flex-wrap: wrap; gap: 9px;
  padding: 12px 16px; margin-bottom: 18px; border-radius: var(--r-lg);
  background: var(--glass-bg); -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, .55);
}
[data-theme="dark"] .mood-cloud { box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, .06); }
.mood-label { font-size: 13px; color: var(--text-2); margin-right: 2px; white-space: nowrap; }
.mood-chip {
  padding: 7px 15px; border-radius: var(--r-pill); font-size: 13px; cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text-2);
  transition: transform var(--t), color var(--t), border-color var(--t), box-shadow var(--t);
}
.mood-chip:hover {
  color: #fff; border-color: transparent; background: var(--grad);
  transform: translateY(-2px); box-shadow: 0 6px 16px rgba(83, 74, 183, .3);
}
.mood-chip.mood-lucky {
  margin-left: auto; color: #fff; border-color: transparent;
  background: linear-gradient(135deg, #d4537e 0%, #ba7517 100%);
  box-shadow: 0 4px 14px rgba(212, 83, 126, .32);
}
.mood-chip.mood-lucky:hover { filter: brightness(1.08); }

/* 虚拟书架：一层木隔板一排书，书竖着插在架子上 */
.bookshelf { display: flex; flex-direction: column; gap: 14px; padding: 6px 0 10px; }
.shelf-row {
  display: flex; align-items: flex-end; gap: 5px; padding: 10px 14px 0;
  border-bottom: 13px solid #b98a5a; border-radius: 0 0 8px 8px;
  background: linear-gradient(180deg, rgba(245, 232, 212, .85) 0%, rgba(239, 217, 189, .95) 100%);
  box-shadow: inset 0 -3px 8px rgba(120, 80, 40, .18), 0 8px 18px rgba(60, 40, 20, .12);
  overflow-x: auto;
}
[data-theme="dark"] .shelf-row {
  border-bottom-color: #7d5a35;
  background: linear-gradient(180deg, rgba(60, 46, 34, .8) 0%, rgba(48, 36, 27, .9) 100%);
}
.shelf-book {
  flex: 1 1 0; min-width: 30px; max-width: 58px; height: 132px;
  background: var(--bc); border-radius: 4px 4px 2px 2px; color: #fff;
  writing-mode: vertical-rl; text-orientation: mixed;
  padding: 9px 4px; cursor: pointer; position: relative;
  display: flex; align-items: center; gap: 8px;
  box-shadow: inset -4px 0 8px rgba(0, 0, 0, .28), inset 2px 0 3px rgba(255, 255, 255, .18);
  transition: transform .22s cubic-bezier(.4, 0, .2, 1), box-shadow var(--t);
}
.shelf-book:hover {
  transform: translateY(-16px) rotate(-2.5deg);
  box-shadow: inset -4px 0 8px rgba(0, 0, 0, .28), 0 12px 22px rgba(24, 21, 60, .35);
}
.shelf-book .sb-title {
  font-size: 12px; line-height: 1.2; max-height: 100px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.shelf-book .sb-slot {
  font-size: 10px; opacity: .75; border-top: 1px solid rgba(255, 255, 255, .35); padding-top: 4px;
}
.shelf-book .sb-out {
  position: absolute; right: 3px; bottom: 4px; font-size: 10px;
  background: rgba(0, 0, 0, .35); border-radius: 4px; padding: 2px 3px; writing-mode: horizontal-tb;
}


/* ============================================================
   创新样式 ⑤：成就徽章墙（读者侧栏下方）
   ============================================================ */
.badge-wall { padding: 12px 12px 14px; border-top: 1px solid rgba(255, 255, 255, .1); }
.bw-title { font-size: 12px; color: rgba(255, 255, 255, .6); margin-bottom: 10px; letter-spacing: 1px; }
.bw-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.bw-item {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 8px 2px 6px; border-radius: 12px; cursor: default;
  background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .1);
  transition: transform var(--t), background var(--t), box-shadow var(--t);
}
.bw-item .bw-ico { width: 20px; height: 20px; color: rgba(255, 255, 255, .32); transition: color var(--t); }
.bw-item .bw-name { font-size: 10px; color: rgba(255, 255, 255, .45); white-space: nowrap; }
.bw-item.got {
  background: linear-gradient(160deg, rgba(255, 255, 255, .28), rgba(255, 255, 255, .12));
  border-color: rgba(255, 255, 255, .38);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .22);
}
.bw-item.got .bw-ico { color: #ffe9a8; }
.bw-item.got .bw-name { color: #fff; }
.bw-item:hover { transform: translateY(-3px); }
@media (max-width: 820px) {
  .badge-wall { border-top: none; padding: 6px 8px; }
  .bw-list { gap: 4px; }
  .bw-item .bw-name { display: none; }
}

/* ============================================================
   本轮改造
   ① 返回键放进搜索栏那一行（不再被搜索栏盖住）
   ② 左侧导航栏固定不动、收紧留白
   ③ 成就墙：12 枚、从上往下罗列、点开看条件与时间
   ============================================================ */

/* ---------- ① 返回键 & 搜索页留白 ---------- */
/* 返回键和搜索框同排，做成胶囊，鼠标移上去向左轻推 */
.back-pill {
  flex: none; border-radius: var(--r-pill); white-space: nowrap;
  padding: 9px 16px; font-size: 14px; font-weight: 600;
  background: var(--surface); box-shadow: var(--shadow-sm);
  transition: transform var(--t), color var(--t), border-color var(--t);
}
.back-pill:hover { transform: translateX(-3px); color: var(--c-primary); border-color: var(--c-primary); }

/* 搜索页从顶部铺满，但顶部留出搜索栏那一行的高度，
   这样搜索栏和返回键永远露在上面，内容也不会被压住。
   这里的数值只是兜底，真正用的时候 app.js 会按搜索栏的实际底边再算一次
   （搜索栏在主内容区里有 24px 上边距，写死容易算少，把历史记录压住） */
.search-screen { padding: 104px 16px 22px; }

/* ---------- ② 左侧导航栏：固定不动 + 收紧留白 ---------- */
.sidebar {
  position: sticky; top: 0; align-self: flex-start;
  height: 100vh; max-height: 100vh; overflow: hidden;
}
.brand { padding: 12px 14px; }
.sidebar nav { flex: none; padding: 4px 0; }
.nav-item { padding: 9px 12px; font-size: 13.5px; }
.nav-item .nav-ico { width: 26px; height: 26px; padding: 5px; }
.sidebar-foot { padding: 10px 12px; }
.sidebar-foot .btn { margin-top: 6px; }
.sidebar-foot #readerWhoami { margin-bottom: 2px; }

/* ---------- ③ 成就墙：纵向罗列、可点击 ---------- */
.badge-wall {
  flex: 1; min-height: 0; display: flex; flex-direction: column;
  padding: 8px 10px 10px; border-top: 1px solid rgba(255, 255, 255, .1);
}
.bw-title { font-size: 11px; margin-bottom: 6px; letter-spacing: .5px; }
.bw-list {
  display: flex; flex-direction: column; gap: 4px;
  overflow-y: auto; min-height: 0; padding-right: 3px;
  scrollbar-width: thin;
}
.bw-list::-webkit-scrollbar { width: 5px; }
.bw-list::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, .22); border-radius: 3px; }
.bw-item {
  flex: none; flex-direction: row; align-items: center; justify-content: flex-start;
  gap: 8px; padding: 6px 9px; border-radius: 10px; cursor: pointer;
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .09);
}
.bw-item:hover { background: rgba(255, 255, 255, .16); transform: translateX(2px); }
.bw-item .bw-ico { width: 17px; height: 17px; flex: none; }
.bw-item .bw-name { font-size: 11px; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bw-item .bw-tick { font-size: 11px; color: #ffe9a8; }
.bw-item .bw-lock { font-size: 10px; opacity: .5; }
.bw-item.got .bw-name { color: #fff; }

/* ---------- 成就详情弹窗 ---------- */
.badge-modal-box { width: 400px; }
.bdg-card { display: flex; gap: 16px; align-items: center; padding: 14px; border-radius: var(--r); background: var(--surface-2); border: 2px solid var(--border-strong); }
.bdg-card.got { background: var(--grad-soft); border-color: var(--c-primary); box-shadow: 0 8px 22px rgba(83, 74, 183, .18); }
.bdg-ico { width: 46px; height: 46px; flex: none; color: var(--text-3); }
.bdg-card.got .bdg-ico { color: var(--c-primary); }
.bdg-info { flex: 1; min-width: 0; }
.bdg-name { font-size: 17px; font-weight: bold; color: var(--text); margin-bottom: 4px; }
.bdg-cond { font-size: 13px; color: var(--text-2); line-height: 1.6; }
.bdg-state { margin-top: 8px; font-size: 13px; padding: 4px 10px; border-radius: var(--r-pill); display: inline-block; }
.bdg-state.got { background: rgba(30, 142, 62, .14); color: #2ea44f; font-weight: 600; }
.bdg-state.lock { background: var(--surface-3); color: var(--text-3); }

/* ---------- 窄屏：侧栏变顶部横条，取消固定高度 ---------- */
@media (max-width: 820px) {
  .sidebar {
    position: sticky; top: 0; height: auto; max-height: none; overflow: visible;
  }
  .sidebar nav { flex: 1; padding: 0; }
  .badge-wall { flex: none; padding: 6px 8px; border-top: none; border-left: 1px solid rgba(255, 255, 255, .1); }
  .bw-list { flex-direction: row; overflow-x: auto; overflow-y: hidden; gap: 6px; }
  .bw-item .bw-name { display: none; }
  .bw-item { padding: 6px; }
  .search-screen { padding: 124px 12px 20px; }
}

/* ============================================================
   紧凑卡片：封面在左、信息在右，卡片高度砍到原来的三分之一
   ============================================================ */
.book-grid { grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; }

.book-card {
  flex-direction: row; align-items: center; gap: 12px;
  padding: 10px 12px !important;
}
.bc-cover { width: 62px; flex: none; aspect-ratio: 3 / 4; border-radius: 8px; }
.bc-cover .book-cover-ph { font-size: 20px; }
.bc-badge {
  top: auto; bottom: 3px; right: 3px; left: 3px; text-align: center;
  padding: 1px 4px; font-size: 10px; border-radius: 5px;
}
.bc-body { padding: 0; flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 5px; }
.bc-title {
  font-size: 13.5px; white-space: normal; line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.bc-meta { display: flex; align-items: center; gap: 6px; min-width: 0; }
.bc-author { margin-top: 0; flex: 1; min-width: 0; }
.bc-cat { margin-top: 0; flex: none; }
.bc-actions { padding: 0; gap: 6px; }
.bc-actions .btn.tiny { padding: 4px 10px; flex: none; }
/* 3D 书脊那条竖线跟着变短一点，别抢封面 */
.book-card::before { width: 7px; }

@media (max-width: 560px) {
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .bc-cover { width: 54px; }
  .bc-actions { flex-direction: row; }
}

/* ============================================================
   沉浸式书房：一层隔板 + 站在板上的书（宽高由 JS 按 id 给出）
   ============================================================ */
.study-room { display: flex; flex-direction: column; gap: 26px; padding: 8px 0 14px; width: 100%; }
/* 书架视图下容器要脱离网格，整面墙才能铺满内容区宽度 */
#rSearchTable.shelf-mode { display: block; width: 100%; }
.shelf-row {
  display: block; overflow: visible; padding: 0; border: none; background: none; box-shadow: none;
}
.shelf-books {
  display: flex; align-items: flex-end; gap: 8px; padding: 0 16px;
  overflow-x: auto; overflow-y: hidden; min-height: 212px;
}
.shelf-board {
  height: 18px; margin: 0 4px; border-radius: 4px;
  background: linear-gradient(180deg, #c9975f 0%, #a9713f 55%, #8a5a2b 100%);
  box-shadow: 0 6px 14px rgba(60, 40, 20, .28), inset 0 1px 0 rgba(255, 255, 255, .35);
}
[data-theme="dark"] .shelf-board { background: linear-gradient(180deg, #7d5a35 0%, #5d4127 55%, #46311d 100%); }
.shelf-book {
  flex: 0 0 var(--w, 32px); width: var(--w, 32px); height: var(--h, 128px);
  min-width: 0; max-width: none; padding: 8px 3px 6px;
  transition: transform .22s cubic-bezier(.34, 1.4, .64, 1), box-shadow var(--t);
}
.shelf-book .sb-cap {
  position: absolute; left: 3px; right: 3px; top: 3px; height: 4px; border-radius: 2px;
  background: rgba(255, 255, 255, .28);
}
.shelf-book:hover { transform: translateY(-22px) rotate(-3deg); }
.shelf-book .sb-title { max-height: 138px; font-size: 13px; }

/* 整面墙的说明条：书架视图不分页，用这一行告诉用户「已经全在这了」 */
.wall-note {
  padding: 8px 12px; font-size: 12.5px; color: var(--text-2);
  background: var(--glass-bg); border: 1px solid var(--glass-brd); border-radius: 10px;
}

/* ============================================================
   拟物书卡：书口纸页 + 折角 + 悬停浮出的简介
   ============================================================ */
.bc-cover { overflow: hidden; }
.bc-pages {
  position: absolute; top: 6px; bottom: 6px; right: 3px; width: 4px; border-radius: 2px;
  background: repeating-linear-gradient(180deg, #fff 0 2px, #dcd6ea 2px 4px);
  opacity: .85;
}
.bc-corner {
  position: absolute; right: 0; bottom: 0; width: 14px; height: 14px;
  background: var(--surface-2);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  box-shadow: -1px -1px 0 rgba(0, 0, 0, .08);
}
.bc-peek {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 4;
  padding: 8px 12px 10px; font-size: 12px; line-height: 1.5; color: var(--text-2);
  background: var(--glass-bg); -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--glass-brd);
  opacity: 0; transform: translateY(8px); pointer-events: none;
  transition: opacity .22s, transform .22s;
}
.book-card:hover .bc-peek { opacity: 1; transform: translateY(0); }

/* ============================================================
   抽书翻页详情：封面盖在书页上，打开时向左翻开
   ============================================================ */
.fb-stage { display: flex; justify-content: center; perspective: 1600px; padding: 10px; }
/* 书宽 = 视口一半减边距（上限 720px）。封面翻开时会绕左边缘翻到书页左侧，
   翻开后整体宽度约等于 2×书宽，限制在半个视口以内即可保证完整落在页面中、不被裁切。
   .fb-book.open 让整本右移半宽 →「翻开的封面(左) + 书页(右)」整体居中。 */
.fb-book { position: relative; width: min(720px, calc(50vw - 36px)); transform-style: preserve-3d; transition: transform .85s cubic-bezier(.3, .8, .2, 1); }
.fb-book.open { transform: translateX(50%); }
.fb-spread {
  display: flex; border-radius: 10px; overflow: hidden;
  background: #fdfaf3; box-shadow: 0 24px 60px rgba(24, 21, 60, .4);
}
[data-theme="dark"] .fb-spread { background: #2a2547; }
.fb-page { flex: 1; min-width: 0; padding: 22px 24px; min-height: 400px; }
.fb-page.fb-left { border-right: 1px solid rgba(0, 0, 0, .08); }
[data-theme="dark"] .fb-page.fb-left { border-right-color: rgba(255, 255, 255, .1); }
.fb-page h3 { font-size: 19px; margin-bottom: 14px; color: var(--text); }
.fb-row { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; border-bottom: 1px dashed var(--border); font-size: 13px; }
.fb-row span { color: var(--text-3); }
.fb-row b { color: var(--text); font-weight: 500; text-align: right; }
.fb-tags { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px; }
.fb-desc-label { font-size: 13px; color: var(--text-3); margin-bottom: 8px; }
.fb-desc { font-size: 13.5px; line-height: 1.8; color: var(--text-2); max-height: 250px; overflow-y: auto; }
.fb-spread .modal-foot { margin-top: 18px; justify-content: flex-end; }
.fb-cover {
  position: absolute; inset: 0; z-index: 3; cursor: pointer;
  transform-origin: left center; transform-style: preserve-3d;
  transition: transform .85s cubic-bezier(.3, .8, .2, 1);
}
.fb-book.open .fb-cover { transform: rotateY(-172deg); }
.fb-cover-face { position: absolute; inset: 0; border-radius: 10px; overflow: hidden; backface-visibility: hidden; }
.fb-cover-front {
  background: var(--grad); color: #fff; padding: 26px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  box-shadow: 0 20px 50px rgba(24, 21, 60, .45);
}
.fb-cover-back {
  transform: rotateY(180deg);
  background: repeating-linear-gradient(180deg, #fdfaf3 0 6px, #f3ecdd 6px 12px);
  border: 1px solid rgba(0, 0, 0, .1);
}
[data-theme="dark"] .fb-cover-back { background: repeating-linear-gradient(180deg, #2a2547 0 6px, #241f3d 6px 12px); }
.fb-cover-art { width: 190px; height: 260px; border-radius: 8px; overflow: hidden; background: rgba(255, 255, 255, .16); display: flex; align-items: center; justify-content: center; }
.fb-cover-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.fb-cover-title { font-size: 20px; font-weight: 500; text-align: center; max-width: 90%; }
.fb-cover-author { font-size: 13px; opacity: .9; }
.fb-hint { font-size: 12px; opacity: .8; border: 1px solid rgba(255, 255, 255, .5); border-radius: 999px; padding: 3px 12px; }

/* ============================================================
   阅读报告 + 借阅热力日历
   ============================================================ */
.report-panel { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 16px; }
.rp-card, .rp-heat {
  background: var(--glass-bg); -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-brd); border-radius: var(--r); padding: 16px 18px;
  box-shadow: var(--shadow-sm);
}
.rp-card { flex: 1 1 260px; }
.rp-heat { flex: 2 1 420px; overflow-x: auto; }
.rp-head { font-size: 15px; font-weight: bold; color: var(--text); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.rp-tag { font-size: 12px; font-weight: normal; color: var(--c-primary); background: var(--grad-soft); padding: 2px 10px; border-radius: 999px; }
.rp-stats { display: flex; gap: 10px; flex-wrap: wrap; }
.rp-stat { flex: 1 1 62px; background: var(--surface-2); border-radius: var(--r-sm); padding: 10px 8px; text-align: center; }
.rp-stat b { display: block; font-size: 22px; color: var(--c-primary); line-height: 1.2; }
.rp-stat span { font-size: 12px; color: var(--text-3); }
.rp-heat-title { font-size: 13px; color: var(--text-2); margin-bottom: 10px; }
.heat-grid { display: flex; gap: 3px; }
.heat-col { display: flex; flex-direction: column; gap: 3px; }
.heat-cell { width: 13px; height: 13px; border-radius: 3px; background: var(--surface-2); display: inline-block; }
.heat-cell.blank { background: transparent; }
.heat-cell.lv0 { background: var(--surface-2); }
.heat-cell.lv1 { background: #cecbf6; }
.heat-cell.lv2 { background: #7f77dd; }
.heat-cell.lv3 { background: #534ab7; }
[data-theme="dark"] .heat-cell.lv1 { background: #3c3489; }
[data-theme="dark"] .heat-cell.lv2 { background: #534ab7; }
[data-theme="dark"] .heat-cell.lv3 { background: #afa9ec; }
.rp-legend { display: flex; align-items: center; gap: 5px; margin-top: 10px; font-size: 12px; color: var(--text-3); }

/* ============================================================
   今晚读什么：三张卡牌翻面
   ============================================================ */
.lucky-box { width: 620px; text-align: center; }
.lucky-tip { font-size: 13px; color: var(--text-3); margin-bottom: 16px; }
.lucky-cards { display: flex; justify-content: center; gap: 16px; padding: 6px 0 4px; perspective: 1200px; }
.lucky-loading { color: var(--text-3); font-size: 13px; padding: 40px 0; }
.lucky-card { width: 150px; height: 210px; cursor: pointer; }
.lc-inner { position: relative; width: 100%; height: 100%; transform-style: preserve-3d; transition: transform .6s cubic-bezier(.3, .8, .2, 1); }
.lucky-card.flipped .lc-inner { transform: rotateY(180deg); }
.lc-face {
  position: absolute; inset: 0; border-radius: 12px; backface-visibility: hidden;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; padding: 14px;
  border: 1px solid var(--glass-brd); box-shadow: var(--shadow-sm);
}
.lc-back { background: var(--grad); color: #fff; font-size: 18px; letter-spacing: 2px; }
.lc-front { transform: rotateY(180deg); background: var(--surface); }
.lc-title { font-size: 14px; font-weight: 500; color: var(--text); line-height: 1.4; }
.lc-author { font-size: 12px; color: var(--text-3); }
.lc-cat { font-size: 11px; color: var(--c-primary); background: var(--grad-soft); padding: 1px 8px; border-radius: 999px; }

/* ===== AI 书童助手 ===== */
.ai-ball {
  position: fixed; right: 20px; bottom: 20px; z-index: 60;
  width: 54px; height: 54px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; cursor: pointer; user-select: none;
  background: var(--grad); color: #fff;
  box-shadow: 0 8px 22px rgba(83, 74, 183, .45);
  border: 1px solid rgba(255, 255, 255, .5);
  animation: aiPulse 2.6s ease-in-out infinite;
  transition: transform .2s;
}
.ai-ball:hover { transform: scale(1.08) rotate(-6deg); }
@keyframes aiPulse {
  0%, 100% { box-shadow: 0 8px 22px rgba(83, 74, 183, .45); }
  50% { box-shadow: 0 8px 30px rgba(212, 83, 126, .55); }
}
.ai-panel {
  position: fixed; right: 20px; bottom: 88px; z-index: 61;
  width: 360px; max-width: calc(100vw - 36px);
  height: min(540px, 72vh);
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--glass-brd);
  border-radius: 16px;
  box-shadow: var(--shadow-lg, 0 18px 50px rgba(0, 0, 0, .35));
  overflow: hidden;
  animation: aiPop .22s ease;
}
@keyframes aiPop { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }
.ai-head { display: flex; align-items: center; gap: 10px; padding: 12px 14px; color: #fff; background: var(--grad); }
.ai-ava { font-size: 24px; }
.ai-head-text { flex: 1; line-height: 1.2; }
.ai-name { font-weight: 600; font-size: 15px; }
.ai-sub { font-size: 11px; opacity: .85; }
.ai-close {
  width: 26px; height: 26px; border: none; border-radius: 50%;
  background: rgba(255, 255, 255, .22); color: #fff; font-size: 18px; line-height: 1; cursor: pointer;
}
.ai-close:hover { background: rgba(255, 255, 255, .4); }
.ai-chat {
  flex: 1; overflow-y: auto; padding: 14px 12px;
  display: flex; flex-direction: column; gap: 12px; background: var(--bg, #f5f3ff);
}
[data-theme="dark"] .ai-chat { background: rgba(255, 255, 255, .03); }
.ai-msg { display: flex; gap: 8px; max-width: 100%; }
.ai-msg .ai-bubble { padding: 9px 12px; border-radius: 14px; font-size: 13.5px; line-height: 1.55; white-space: pre-wrap; word-break: break-word; }
.ai-msg.bot { align-self: flex-start; }
.ai-msg.bot .ai-bubble { background: var(--surface); border: 1px solid var(--glass-brd); border-bottom-left-radius: 4px; color: var(--text); }
.ai-msg.user { align-self: flex-end; flex-direction: row-reverse; }
.ai-msg.user .ai-bubble { background: var(--grad); color: #fff; border-bottom-right-radius: 4px; }
.ai-ava-sm { font-size: 20px; flex: none; align-self: flex-end; }
.ai-msg.user .ai-ava-sm { display: none; }
.ai-book {
  display: flex; align-items: center; gap: 10px; margin-top: 8px;
  padding: 8px; border-radius: 12px; cursor: pointer;
  background: var(--grad-soft, rgba(83, 74, 183, .08));
  border: 1px solid var(--glass-brd); transition: transform .15s;
}
.ai-book:hover { transform: translateY(-2px); }
.ai-book-cover {
  width: 38px; height: 52px; border-radius: 6px; flex: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700; color: #fff; background: var(--c-primary, #534ab7);
}
.ai-book-meta { flex: 1; min-width: 0; }
.ai-book-title { font-size: 13px; font-weight: 600; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ai-book-author { font-size: 11.5px; color: var(--text-3); margin-top: 2px; }
.ai-book-desc { font-size: 10.5px; color: var(--text-3); margin-top: 3px; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ai-book-stock { font-size: 11px; margin-top: 3px; }
.ai-book-stock.in { color: #2e9e6b; }
.ai-book-stock.out { color: #d4537e; }
.ai-book-go { font-size: 12px; color: var(--c-primary, #534ab7); flex: none; }
.ai-chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 12px 4px; border-top: 1px solid var(--glass-brd); }
.ai-chip {
  font-size: 12px; padding: 5px 10px; border-radius: 999px; cursor: pointer;
  background: var(--grad-soft, rgba(83, 74, 183, .1)); color: var(--c-primary, #534ab7);
  border: 1px solid var(--glass-brd);
}
.ai-chip:hover { background: var(--grad); color: #fff; }
.ai-input { display: flex; gap: 8px; padding: 10px 12px 12px; border-top: 1px solid var(--glass-brd); }
.ai-input textarea {
  flex: 1; resize: none; max-height: 80px; font: inherit; font-size: 13.5px;
  padding: 8px 10px; border-radius: 10px; border: 1px solid var(--glass-brd);
  background: var(--bg, #fff); color: var(--text); outline: none;
}
[data-theme="dark"] .ai-input textarea { background: rgba(255, 255, 255, .06); }
.ai-input textarea:focus { border-color: var(--c-primary, #534ab7); }
.ai-typing { align-self: flex-start; color: var(--text-3); font-style: italic; font-size: 12.5px; }
@media (max-width: 560px) {
  .ai-panel { right: 12px; left: 12px; width: auto; bottom: 80px; }
  .ai-ball { right: 14px; bottom: 14px; }
}