:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --line: #e5e7eb;
  --text: #1f2328;
  --muted: #6b7280;
  --blue: #2563eb;
  --green: #15803d;
  --red: #dc2626;
  --amber: #d97706;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

a { color: var(--blue); text-decoration: none; }

/* ---------- 登录页 ---------- */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 32px 28px;
}
.auth-card h1 { font-size: 20px; margin: 0 0 4px; }
.auth-card .sub { color: var(--muted); font-size: 13px; margin-bottom: 24px; }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.field input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  background: #fff;
  color: var(--text);
}
.field input:focus { border-color: var(--blue); }

.row-inline { display: flex; gap: 8px; }
.row-inline input { flex: 1; }

button {
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  padding: 9px 14px;
}
button:hover { border-color: #c9ced6; }
button.primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
  width: 100%;
  padding: 11px;
  font-weight: 500;
}
button.primary:hover { background: #1d4ed8; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.small { padding: 5px 10px; font-size: 13px; }

.msg { font-size: 13px; margin-top: 10px; min-height: 20px; }
.msg.err { color: var(--red); }
.msg.ok { color: var(--green); }

.switch-line { text-align: center; margin-top: 16px; font-size: 13px; color: var(--muted); }

/* ---------- 应用框架 ---------- */
.topbar {
  height: 56px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand { font-weight: 600; font-size: 15px; }
.topbar .spacer { flex: 1; }
.topbar select {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font-size: 13px;
  color: var(--text);
}
.topbar .who { color: var(--muted); font-size: 13px; }

.layout { display: flex; min-height: calc(100vh - 56px); }
.sidebar {
  width: 190px;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 14px 10px;
  flex-shrink: 0;
}
.sidebar a {
  display: block;
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  margin-bottom: 2px;
}
.sidebar a:hover { background: #f1f3f6; }
.sidebar a.active { background: #e8efff; color: var(--blue); font-weight: 500; }

.content { flex: 1; padding: 22px 24px 40px; max-width: 1400px; }

.page-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 18px; }
.page-head h2 { font-size: 18px; margin: 0; }
.page-head .hint { color: var(--muted); font-size: 13px; }

/* ---------- 卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
}
.card .k { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.card .v { font-size: 26px; font-weight: 600; letter-spacing: -.5px; font-variant-numeric: tabular-nums; }
.card .v .u { font-size: 14px; font-weight: 400; color: var(--muted); margin-left: 3px; }
.card .src { font-size: 11px; color: #9ca3af; margin-top: 6px; }

/* ---------- 表格 ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 18px;
}
.panel-head {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
}
.panel-head .spacer { flex: 1; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid #f0f1f3; }
th { background: #fafbfc; color: var(--muted); font-weight: 500; font-size: 12px; }
tr:last-child td { border-bottom: none; }
td.num { font-variant-numeric: tabular-nums; }

.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 20px;
  font-size: 12px;
  line-height: 18px;
}
.badge.ok { background: #e7f6ec; color: var(--green); }
.badge.err { background: #fdecec; color: var(--red); }
.badge.warn { background: #fdf3e3; color: var(--amber); }
.badge.info { background: #eaf0ff; color: var(--blue); }
.badge.gray { background: #f1f3f5; color: var(--muted); }

.empty { padding: 40px 16px; text-align: center; color: var(--muted); font-size: 13px; }

.toast {
  position: fixed; right: 20px; bottom: 20px;
  background: #1f2328; color: #fff;
  padding: 10px 16px; border-radius: 8px;
  font-size: 13px; opacity: 0; transform: translateY(8px);
  transition: all .2s; pointer-events: none; max-width: 420px;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.err { background: #b91c1c; }

/* ---------- 中控大字屏 ---------- */
.zk-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.zk-tile {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 22px;
  text-align: center;
}
.zk-tile .k { color: var(--muted); font-size: 15px; margin-bottom: 14px; }
.zk-tile .v { font-size: 52px; font-weight: 700; letter-spacing: -1.5px; line-height: 1.1; font-variant-numeric: tabular-nums; }
.zk-tile .v .u { font-size: 18px; font-weight: 400; color: var(--muted); }
.zk-tile.wide { grid-column: span 3; }
.zk-tile.wide .v { font-size: 40px; }

.zk-status { margin-top: 16px; font-size: 14px; color: var(--muted); text-align: center; }

@media (max-width: 760px) {
  .sidebar { display: none; }
  .zk-grid { grid-template-columns: 1fr; }
  .zk-tile.wide { grid-column: span 1; }
}

/* ---------------- 趋势图（纯 SVG，无第三方依赖） ---------------- */
.trend-box { padding: 8px 4px 12px; color: var(--text); }
.trend-svg {
  width: 100%;
  height: 260px;
  display: block;
  overflow: visible;
}
.trend-box .legend {
  display: flex;
  gap: 18px;
  align-items: center;
  padding: 6px 16px 0;
  font-size: 13px;
  color: var(--muted);
}
.trend-box .legend span { display: inline-flex; align-items: center; gap: 6px; }
.trend-box .legend i {
  width: 12px; height: 3px; border-radius: 2px; display: inline-block;
}
.trend-box .legend-note { margin-left: auto; }
select.small {
  padding: 4px 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
}