/* 我的图书馆 · 借阅仪表盘
   配色遵循 dataviz 参考调色板：浅/深两套皆为选定值，非自动翻转 */

:root {
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --s1: #2a78d6;   /* 来源系列色：槽1 蓝 */
  --s2: #1baf7a;   /* 槽2 水绿 */
  --s3: #eda100;   /* 槽3 黄 */
  --s4: #008300;   /* 槽4 绿 */
  --s5: #4a3aa7;   /* 槽5 紫 */
  --s6: #e34948;   /* 槽6 红 */
  --s7: #e87ba4;   /* 槽7 品红 */
  --s8: #eb6834;   /* 槽8 橙 */
  --heat-0: #ecebe4;
  --heat-1: #cde2fb;
  --heat-2: #86b6ef;
  --heat-3: #3987e5;
  --heat-4: #184f95;
  --accent: #2a78d6;
  --star: #b8860b;   /* 评分星星，非系列色 */
}
[data-theme="dark"] {
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --s1: #3987e5;
  --s2: #199e70;
  --s3: #c98500;
  --s4: #008300;
  --s5: #9085e9;
  --s6: #e66767;
  --s7: #d55181;
  --s8: #d95926;
  --heat-0: #242422;
  --heat-1: #0d366b;
  --heat-2: #184f95;
  --heat-3: #256abf;
  --heat-4: #3987e5;
  --accent: #3987e5;
  --star: #eda100;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --s1: #3987e5;
    --s2: #199e70;
    --s3: #c98500;
    --s4: #008300;
    --s5: #9085e9;
    --s6: #e66767;
    --s7: #d55181;
    --s8: #d95926;
    --heat-0: #242422;
    --heat-1: #0d366b;
    --heat-2: #184f95;
    --heat-3: #256abf;
    --heat-4: #3987e5;
    --accent: #3987e5;
    --star: #eda100;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--page);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
}
.wrap { max-width: 1180px; margin: 0 auto; padding: 20px 24px 40px; }
.hidden { display: none !important; }

/* ---- 顶栏 ---- */
.topbar { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 14px; }
.topbar h1 { font-size: 22px; font-weight: 650; margin: 0; letter-spacing: 0.5px; }
.topbar .meta { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.theme-btn {
  border: 1px solid var(--border); background: var(--surface); color: var(--ink-2);
  border-radius: 8px; padding: 6px 12px; cursor: pointer; font-size: 13px;
}
.theme-btn:hover { color: var(--ink); }

/* ---- 示例数据横幅 ---- */
.banner {
  background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--s3);
  border-radius: 8px; padding: 10px 14px; margin-bottom: 14px; color: var(--ink-2); font-size: 13px;
}
.banner code { background: var(--page); border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px; font-size: 12px; }

/* ---- 筛选行：一行，作用于下方全部内容 ---- */
.filters {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-bottom: 16px;
}
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); background: var(--surface); color: var(--ink-2);
  border-radius: 999px; padding: 5px 12px; cursor: pointer; font-size: 13px; user-select: none;
}
.chip .dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.chip.off { opacity: 0.45; }
.chip.off .dot { background: var(--muted) !important; }
.chip:hover { color: var(--ink); }
#range-select {
  border: 1px solid var(--border); background: var(--surface); color: var(--ink-2);
  border-radius: 8px; padding: 6px 8px; font-size: 13px; cursor: pointer;
}
#search-input {
  flex: 1 1 180px; max-width: 300px; margin-left: auto;
  border: 1px solid var(--border); background: var(--surface); color: var(--ink);
  border-radius: 8px; padding: 6px 12px; font-size: 13px; outline: none;
}
#search-input:focus { border-color: var(--accent); }

/* ---- KPI 行 ---- */
.kpis { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.kpi {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 16px 12px;
}
.kpi .label { color: var(--ink-2); font-size: 13px; }
.kpi .value { font-weight: 600; font-size: 28px; margin-top: 2px; }
.kpi.hero .value { font-size: 52px; line-height: 1.1; letter-spacing: -1px; }
.kpi .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }
.kpi.clickable { cursor: pointer; }
.kpi.clickable:hover { border-color: var(--accent); }
.kpi.overview-trend { grid-column: 1 / -1; padding: 14px 16px 8px; }
.overview-trend-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.overview-trend .chart { min-height: 260px; }

/* ---- 卡片 ---- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 18px; margin-bottom: 16px;
}
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.card-head h2 { font-size: 15px; font-weight: 600; margin: 0; }
.card-sub { color: var(--muted); font-size: 12px; margin: 1px 0 0; }
.card-tools { display: flex; align-items: center; gap: 8px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid2 .card { margin-bottom: 16px; }

.icon-btn {
  border: 1px solid var(--border); background: transparent; color: var(--muted);
  border-radius: 6px; width: 28px; height: 28px; cursor: pointer; font-size: 14px; line-height: 1;
}
.icon-btn:hover { color: var(--ink); border-color: var(--axis); }
.icon-btn.on { color: var(--accent); border-color: var(--accent); }

.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 7px; overflow: hidden; }
.seg button {
  border: none; background: transparent; color: var(--ink-2); padding: 4px 12px;
  font-size: 12.5px; cursor: pointer;
}
.seg button + button { border-left: 1px solid var(--border); }
.seg button.on { background: var(--page); color: var(--ink); font-weight: 600; }

/* 图例：≥2 个系列时常驻 */
.legend { display: flex; gap: 14px; margin: 8px 0 0; font-size: 12px; color: var(--ink-2); flex-wrap: wrap; }
.legend .key { display: inline-flex; align-items: center; gap: 6px; }
.legend .swatch { width: 10px; height: 10px; border-radius: 3px; }

.card-body { margin-top: 10px; }
.chart { width: 100%; }
.chart svg { display: block; width: 100%; height: auto; }

/* 图表的表格视图（无障碍替身） */
.chart-table { overflow-x: auto; }
.chart-table table { border-collapse: collapse; width: 100%; font-size: 12.5px; }
.chart-table th, .chart-table td {
  text-align: right; padding: 5px 10px; border-bottom: 1px solid var(--grid);
  font-variant-numeric: tabular-nums;
}
.chart-table th:first-child, .chart-table td:first-child { text-align: left; }
.chart-table th { color: var(--muted); font-weight: 500; }

/* ---- 最常借阅 ---- */
.top-row { display: flex; align-items: center; gap: 10px; padding: 6px 0; border-bottom: 1px solid var(--grid); }
.top-row:last-child { border-bottom: none; }
.top-row .n { width: 34px; text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; flex: none; }
.top-row .n small { color: var(--muted); font-weight: 400; }
.top-row .minibar { height: 8px; border-radius: 4px 4px 4px 4px; background: var(--s1); opacity: .85; flex: none; }
.top-row .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.top-row .t .au { color: var(--muted); font-size: 12px; margin-left: 8px; }
.top-row .accs { display: flex; gap: 4px; flex: none; }
.top-row .accs .dot { width: 8px; height: 8px; border-radius: 50%; }
.empty { color: var(--muted); padding: 18px 0; text-align: center; }

/* ---- 完整书单 ---- */
.check { display: inline-flex; gap: 6px; align-items: center; color: var(--ink-2); font-size: 13px; cursor: pointer; }
.loan-table { overflow-x: auto; }
.loan-table table { border-collapse: collapse; width: 100%; font-size: 13px; }
.loan-table th {
  text-align: left; color: var(--muted); font-weight: 500; padding: 6px 10px;
  border-bottom: 1px solid var(--axis); cursor: pointer; user-select: none; white-space: nowrap;
}
.loan-table th:hover { color: var(--ink); }
.loan-table td { padding: 6px 10px; border-bottom: 1px solid var(--grid); vertical-align: top; }
.loan-table td.num, .loan-table td.date { font-variant-numeric: tabular-nums; white-space: nowrap; }
.loan-table .au { color: var(--muted); font-size: 12px; }
.loan-table .stars { color: var(--star); font-size: 12px; letter-spacing: 1px; }
.loan-table .acc { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.loan-table .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.badge {
  display: inline-block; font-size: 11.5px; border-radius: 5px; padding: 1px 7px;
  background: var(--page); border: 1px solid var(--border); color: var(--ink-2); white-space: nowrap;
}
.badge.open { color: var(--accent); border-color: var(--accent); }
.pager { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 12px; color: var(--ink-2); font-size: 13px; }
.pager button {
  border: 1px solid var(--border); background: transparent; color: var(--ink-2);
  border-radius: 6px; padding: 3px 10px; cursor: pointer;
}
.pager button:disabled { opacity: 0.35; cursor: default; }
.pager button:not(:disabled):hover { color: var(--ink); }

/* ---- 提示框：悬停增强，不做唯一入口 ---- */
.tooltip {
  position: fixed; z-index: 50; pointer-events: none; max-width: 320px;
  background: var(--surface); color: var(--ink); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 12px; font-size: 12.5px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.14);
}
.tooltip .tt-title { font-weight: 600; margin-bottom: 4px; }
.tooltip .tt-row { display: flex; align-items: center; gap: 7px; margin: 2px 0; }
.tooltip .tt-key { width: 12px; height: 3px; border-radius: 2px; flex: none; }
.tooltip .tt-val { font-weight: 600; font-variant-numeric: tabular-nums; }
.tooltip .tt-name { color: var(--ink-2); }
.tooltip .tt-muted { color: var(--muted); }

/* ---- 图表内 SVG 通用 ---- */
.chart text { font-family: inherit; }
.tick-label { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.bar-hit { fill: transparent; }
.bar-g.dim rect.seg { opacity: 0.55; }
.heat-cell:hover { stroke: var(--ink); stroke-width: 1; }

.foot { color: var(--muted); font-size: 12px; text-align: center; margin-top: 24px; }

@media (max-width: 860px) {
  .wrap { padding: 14px 12px 30px; }
  .kpis { grid-template-columns: 1fr 1fr; }
  .grid2 { grid-template-columns: 1fr; }
  #search-input { margin-left: 0; max-width: none; }
}

@media (max-width: 520px) {
  .kpis { grid-template-columns: 1fr; }
  .kpi.overview-trend { grid-column: auto; }
}