:root {
  --bg: #f5f5f3;
  --surface: #fbfbfa;
  --ink: #1b1d22;
  --ink-soft: #5c5f66;
  --ink-faint: #8a8d93;
  --line: #e3e2de;
  --line-strong: #d4d3ce;
  --accent: #2f6f4e;
  --accent-soft: #e6efe9;
  --danger: #a4432c;
  --warn: #9a7220;
  --radius: 8px;
  --radius-sm: 6px;
  --sidebar-w: 232px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.num {
  font-variant-numeric: tabular-nums lining-nums;
  font-feature-settings: "tnum" 1;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 12px; top: -40px;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top .15s ease;
}
.skip-link:focus { top: 12px; }

:is(a, button, input, [tabindex]):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ---------- 布局 ---------- */
.layout { display: flex; min-height: 100vh; }

.content {
  flex: 1;
  min-width: 0;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
}

/* ---------- 侧边导航 ---------- */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 20px 14px;
  z-index: 40;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 8px 18px;
}
.brand-mark {
  width: 28px; height: 28px;
  display: grid; place-items: center;
  background: var(--ink);
  color: var(--bg);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 15px;
}
.brand-name { font-weight: 650; font-size: 15px; letter-spacing: .01em; }

.nav { display: flex; flex-direction: column; gap: 2px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
}
.nav-item svg {
  width: 16px; height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  flex: none;
}
.nav-item:hover { background: #eeeeeb; color: var(--ink); }
.nav-item.is-active { background: var(--accent-soft); color: var(--accent); }

.nav-badge {
  margin-left: auto;
  min-width: 18px; height: 18px;
  padding: 0 5px;
  display: grid; place-items: center;
  background: var(--ink);
  color: var(--bg);
  border-radius: 9px;
  font-size: 11px;
  font-weight: 600;
}
.nav-badge[hidden] { display: none; }

.sidebar-footer { margin-top: auto; padding: 14px 8px 0; }
.demo-note {
  margin: 0;
  font-size: 11.5px;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(27, 29, 34, .35);
  z-index: 35;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 24px;
  background: rgba(245, 245, 243, .92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.menu-btn { display: none; }

.icon-btn {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--ink);
  cursor: pointer;
}
.icon-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.icon-btn:hover { background: #eeeeeb; }

.workspace-loc {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-soft);
  font-weight: 500;
  white-space: nowrap;
}
.workspace-loc svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.4; }

.search-wrap { position: relative; flex: 1; max-width: 380px; margin-left: auto; }
.search-icon {
  position: absolute;
  left: 10px; top: 50%;
  transform: translateY(-50%);
  width: 15px; height: 15px;
  fill: none; stroke: var(--ink-faint); stroke-width: 1.5;
  pointer-events: none;
}
#global-search {
  width: 100%;
  padding: 8px 12px 8px 32px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}
#global-search::placeholder { color: var(--ink-faint); }
#global-search:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px rgba(47, 111, 78, .12); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font: inherit;
  font-weight: 550;
  cursor: pointer;
  white-space: nowrap;
}
.btn svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.btn-secondary { background: var(--surface); border-color: var(--line-strong); color: var(--ink); }
.btn-secondary:hover { background: #eeeeeb; }

/* ---------- 主区域 ---------- */
main { padding: 24px; display: flex; flex-direction: column; gap: 20px; }

#section-overview { display: flex; flex-direction: column; gap: 20px; scroll-margin-top: 72px; }
#section-tasks, #section-team, #section-notifications { scroll-margin-top: 72px; }

.greeting-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.greeting-row h1 { margin: 0 0 4px; font-size: 22px; font-weight: 680; letter-spacing: -.01em; }
.greeting-sub { margin: 0; color: var(--ink-soft); max-width: 56ch; }

.range-group {
  display: flex;
  gap: 2px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 3px;
}
.range-btn {
  padding: 6px 12px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}
.range-btn:hover { color: var(--ink); background: #eeeeeb; }
.range-btn.is-active { background: var(--ink); color: var(--bg); }

/* ---------- 卡片 ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}
.card-head h2 { margin: 0; font-size: 15px; font-weight: 640; }

.demo-tag {
  font-size: 11px;
  color: var(--warn);
  border: 1px solid #e4dbc3;
  background: #f7f2e4;
  border-radius: 99px;
  padding: 1px 8px;
  white-space: nowrap;
}

/* ---------- 指标卡 ---------- */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.metric-card { padding: 16px 18px; }
.metric-label { margin: 0 0 8px; font-size: 12.5px; font-weight: 550; color: var(--ink-soft); }
.metric-value { margin: 0; font-size: 26px; font-weight: 680; letter-spacing: -.02em; }
.metric-delta { margin: 6px 0 0; font-size: 12.5px; color: var(--ink-soft); }
.metric-delta .up { color: var(--accent); font-weight: 600; }
.metric-delta .down { color: var(--danger); font-weight: 600; }

/* ---------- 图表 ---------- */
.chart-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 14px;
}

.chart-area svg, .chart-donut svg { display: block; width: 100%; height: auto; }

.chart-unit { margin: 6px 0 0; font-size: 11.5px; color: var(--ink-faint); }

.chart-axis-label { fill: var(--ink-faint); font-size: 10.5px; font-family: var(--font); }
.chart-value-label { fill: var(--ink-soft); font-size: 10.5px; font-family: var(--font); font-variant-numeric: tabular-nums; }

.donut-wrap { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.chart-donut { flex: 1 1 150px; max-width: 210px; margin: 0 auto; }
.donut-center-value { font-size: 19px; font-weight: 680; fill: var(--ink); font-family: var(--font); }
.donut-center-label { font-size: 10.5px; fill: var(--ink-faint); font-family: var(--font); }

.legend { list-style: none; margin: 0; padding: 0; flex: 1 1 160px; display: flex; flex-direction: column; gap: 8px; }
.legend li { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.legend .swatch { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.legend .legend-name { color: var(--ink-soft); }
.legend .legend-value { margin-left: auto; font-weight: 600; font-variant-numeric: tabular-nums; }

/* ---------- 列表卡片 ---------- */
.list-card { padding: 18px; }
.bottom-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: start;
}

.task-progress { margin: 0; color: var(--ink-soft); font-size: 12.5px; }

.task-list { list-style: none; margin: 0; padding: 0; }
.task-list li + li { border-top: 1px solid var(--line); }
.task-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 4px;
}
.task-item input[type="checkbox"] {
  width: 16px; height: 16px;
  margin: 3px 0 0;
  accent-color: var(--accent);
  cursor: pointer;
  flex: none;
}
.task-item label { cursor: pointer; flex: 1; }
.task-title { display: block; font-weight: 500; }
.task-meta { display: block; font-size: 12px; color: var(--ink-faint); margin-top: 1px; }
.task-item.is-done .task-title { color: var(--ink-faint); text-decoration: line-through; }

.priority {
  font-size: 11px;
  border-radius: 99px;
  padding: 1px 8px;
  border: 1px solid;
  white-space: nowrap;
  margin-top: 2px;
}
.priority.high { color: var(--danger); border-color: #e5cec6; background: #f8efeb; }
.priority.mid { color: var(--warn); border-color: #e4dbc3; background: #f7f2e4; }
.priority.low { color: var(--ink-soft); border-color: var(--line-strong); background: #f1f1ee; }

/* ---------- 团队 ---------- */
.team-list { list-style: none; margin: 0; padding: 0; }
.team-list li + li { border-top: 1px solid var(--line); }
.team-item { display: flex; align-items: center; gap: 11px; padding: 10px 4px; }
.avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 12.5px; font-weight: 650;
  color: #fff;
  flex: none;
}
.team-name { font-weight: 550; }
.team-role { font-size: 12px; color: var(--ink-faint); }
.status {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ink-soft);
  white-space: nowrap;
}
.status::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ink-faint);
}
.status.online::before { background: #4a9d6e; }
.status.busy::before { background: #d0a13c; }
.status.offline::before { background: #b6b5b0; }

/* ---------- 通知 ---------- */
.unread-count { font-size: 12px; color: var(--ink-faint); font-weight: 450; }
.notif-list { list-style: none; margin: 0; padding: 0; }
.notif-list li + li { border-top: 1px solid var(--line); }
.notif-item { display: flex; gap: 11px; padding: 11px 4px; align-items: flex-start; }
.notif-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 6px;
  flex: none;
}
.notif-item.is-read .notif-dot { background: transparent; border: 1px solid var(--line-strong); }
.notif-body { flex: 1; min-width: 0; }
.notif-title { font-weight: 550; margin: 0; }
.notif-item.is-read .notif-title { font-weight: 400; color: var(--ink-soft); }
.notif-text { margin: 2px 0 0; color: var(--ink-soft); font-size: 13px; }
.notif-time { display: block; font-size: 11.5px; color: var(--ink-faint); margin-top: 3px; }
.mark-read {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 99px;
  cursor: pointer;
  white-space: nowrap;
  margin-top: 2px;
}
.mark-read:hover { background: #eeeeeb; color: var(--ink); }
.notif-item.is-read .mark-read { visibility: hidden; }

.empty-hint { color: var(--ink-faint); font-size: 13px; margin: 8px 4px; }

.page-footer { color: var(--ink-faint); font-size: 12px; padding: 4px 2px 12px; }
.page-footer p { margin: 0; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .chart-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform .22s ease;
    box-shadow: none;
  }
  .sidebar.is-open { transform: translateX(0); box-shadow: 4px 0 24px rgba(0,0,0,.12); }
  .content { margin-left: 0; }
  .menu-btn { display: grid; }
  .workspace-loc span { display: none; }
  .bottom-grid { grid-template-columns: 1fr; }
  main { padding: 18px 16px; }
  .topbar { padding: 10px 16px; gap: 10px; }
  #export-csv { padding: 8px 10px; }
  #export-csv .btn-text { display: none; }
}

@media (max-width: 560px) {
  .metric-grid { grid-template-columns: 1fr; }
  .greeting-row { flex-direction: column; align-items: stretch; }
  .range-group { justify-content: space-between; }
  .range-btn { flex: 1; padding: 7px 4px; font-size: 13px; }
  .search-wrap { max-width: none; }
  .donut-wrap { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sidebar { transition: none; }
}