:root {
  --bg: #eef1f6;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --border: #d8dee9;
  --border-strong: #c5cdd9;
  --text: #1a2332;
  --muted: #5c6b7f;
  --accent: #0f4c81;
  --accent-hover: #1565a8;
  --danger: #c62828;
  --ok: #1b7f4a;
  --warn: #b45309;
  --sidebar: #0c1829;
  --sidebar-text: #c8d4e3;
  --sidebar-active: #1a4d7a;
  --shadow: 0 1px 2px rgba(15, 35, 60, 0.06);
  --radius: 6px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body, #app { min-height: 100%; margin: 0; }
body {
  font-family: var(--font);
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  line-height: 1.45;
}
button, input, select { font: inherit; }
button { cursor: pointer; }
input, select {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 7px 10px;
  color: var(--text);
  background: var(--surface);
  min-width: 0;
}
input:focus, select:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 2px rgba(15, 76, 129, 0.15);
}
button:disabled { opacity: 0.55; cursor: not-allowed; }

/* login */
.login-body { background: var(--sidebar); }
.login-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 440px;
}
.login-brand {
  padding: 48px 56px;
  color: #e8eef5;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(145deg, #0c1829 0%, #132a45 100%);
}
.login-brand h1 { font-size: 32px; margin: 8px 0 12px; font-weight: 600; }
.login-brand p { max-width: 480px; color: #a8b8cc; margin: 0; }
.login-brand ul { margin: 24px 0 0; padding: 0; list-style: none; font-size: 13px; color: #c8d4e3; }
.login-brand li { padding: 8px 0; border-top: 1px solid rgba(255,255,255,0.08); }
.eyebrow { margin: 0; font-size: 11px; letter-spacing: 0.12em; color: #7aa3c7; text-transform: uppercase; }
.login-panel { background: var(--bg); display: flex; align-items: center; justify-content: center; padding: 32px; }
.login-form { width: min(360px, 100%); }
.login-form h2 { margin: 4px 0 16px; font-size: 22px; font-weight: 600; }
.login-form label { display: flex; flex-direction: column; gap: 4px; margin-top: 12px; font-size: 12px; color: var(--muted); }
.svc, .err { margin-top: 12px; padding: 8px 10px; border-radius: var(--radius); font-size: 13px; }
.svc { background: var(--surface); border: 1px solid var(--border); color: var(--muted); }
.svc.ok { background: #e8f5ee; color: var(--ok); border-color: #b8dfc8; }
.svc.bad, .err { background: #fdecea; color: var(--danger); border-color: #f5c4c0; }
.err:empty { display: none; }
.addr { font-size: 11px; word-break: break-all; }

/* shell */
.shell { min-height: 100vh; display: grid; grid-template-columns: 200px 1fr; }
.side {
  background: var(--sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  padding: 16px 10px;
}
.brand { padding: 4px 10px 20px; border-bottom: 1px solid rgba(255,255,255,0.06); margin-bottom: 12px; }
.brand strong { display: block; font-size: 15px; color: #fff; font-weight: 600; }
.brand span { font-size: 11px; color: #7a8fa6; }
.side nav { display: flex; flex-direction: column; gap: 2px; }
.side nav button {
  text-align: left;
  background: transparent;
  color: var(--sidebar-text);
  border: 0;
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 14px;
}
.side nav button.on { background: var(--sidebar-active); color: #fff; }
.side nav button:hover:not(.on) { background: rgba(255,255,255,0.06); }
.side-foot { margin-top: auto; padding: 12px 10px 0; border-top: 1px solid rgba(255,255,255,0.08); font-size: 13px; }
.who span { display: block; color: #7a8fa6; font-size: 11px; margin-top: 2px; }
.text-btn {
  display: block; width: 100%; text-align: left;
  background: transparent; color: #9aabbd; border: 0; padding: 6px 0; font-size: 12px;
}
.text-btn:hover { color: #fff; }

.workspace { min-width: 0; display: flex; flex-direction: column; }
.top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  height: 52px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.top h1 { font-size: 17px; margin: 0; font-weight: 600; }
.spacer { flex: 1; }
.live { color: var(--muted); font-size: 12px; display: flex; align-items: center; gap: 6px; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: #adb5bd; }
.dot.on { background: var(--ok); }

main { padding: 16px 20px 24px; flex: 1; overflow: auto; }

/* KPI */
.kpi-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  box-shadow: var(--shadow);
}
.kpi-label { display: block; font-size: 11px; color: var(--muted); margin-bottom: 4px; }
.kpi-value { font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.kpi.warn .kpi-value { color: var(--danger); }
.kpi.ok .kpi-value { color: var(--ok); }

/* panels */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 12px;
  overflow: hidden;
}
.panel-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  min-height: 44px;
}
.panel-head h2, .panel-head h3 { margin: 0; font-size: 14px; font-weight: 600; }
.panel-actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.panel-body { padding: 0; }
.panel-body.pad { padding: 12px 14px; }
.panel-body + .panel-body { border-top: 1px solid var(--border); }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 10px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.toolbar label { flex-direction: row; align-items: center; gap: 6px; font-size: 13px; color: var(--text); margin: 0; }
.toolbar .grow { flex: 1; min-width: 120px; }

/* monitor master-detail */
.monitor-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 12px;
  align-items: start;
}
.train-rail {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
}
.train-item {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: var(--shadow);
}
.train-item strong { font-size: 14px; color: var(--accent); }
.train-item.on { border-color: var(--accent); background: #f0f6fc; box-shadow: 0 0 0 1px var(--accent); }
.train-route { font-size: 12px; color: var(--muted); }
.train-meta { font-size: 11px; color: var(--muted); display: flex; gap: 8px; }
.train-meta .bad { color: var(--danger); font-style: normal; font-weight: 600; }

.monitor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.monitor-grid .span2 { grid-column: 1 / -1; }

.split-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* tables */
.table-wrap { overflow: auto; max-height: 360px; }
table.data { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data th, table.data td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
table.data th {
  position: sticky;
  top: 0;
  background: var(--surface-2);
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
  white-space: nowrap;
  z-index: 1;
}
table.data tbody tr:hover td { background: #f4f8fc; }
table.data .mono { font-variant-numeric: tabular-nums; font-size: 12px; }
table.data .sub { display: block; font-size: 11px; color: var(--muted); margin-top: 2px; }

.tag {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
  background: #e8ecf1;
  color: var(--muted);
}
.tag.red { background: #fdecea; color: var(--danger); }
.tag.green { background: #e6f4ec; color: var(--ok); }
.tag.amber { background: #fef3e2; color: var(--warn); }

.btn {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--radius);
  padding: 6px 12px;
  font-size: 13px;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn.sm { padding: 4px 8px; font-size: 12px; }
.btn.block { width: 100%; margin-top: 12px; padding: 10px; }

.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; }
label.field { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
label.field input,
label.field select,
.form-grid input,
.form-grid select {
  min-height: 36px;
  padding: 8px 10px;
  font-size: 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  width: 100%;
  box-sizing: border-box;
}
label.field input,
label.field select,
.form-grid input,
.form-grid select {
  min-height: 36px;
  padding: 8px 10px;
  font-size: 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  width: 100%;
  box-sizing: border-box;
}
.hint { color: var(--muted); font-size: 12px; line-height: 1.5; margin: 8px 0 0; }
.hint.bad, .runtime-stale-banner { color: var(--danger); font-weight: 500; }
.empty { padding: 24px; text-align: center; color: var(--muted); font-size: 13px; }

canvas.map {
  width: 100%;
  height: 280px;
  display: block;
  background: #e4eaf0;
}
canvas.map-lg { height: 320px; }

.hidden-file {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}
.train-form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-end;
}

.view-toggle {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  overflow: hidden;
  margin-right: 8px;
}
.view-toggle button {
  border: 0;
  background: var(--surface);
  padding: 6px 12px;
  font-size: 12px;
}
.view-toggle button.on {
  background: var(--accent);
  color: #fff;
}

.monitor-viz { min-height: 280px; }
.runtime-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 16px;
  align-items: stretch;
}
@media (max-width: 900px) {
  .runtime-grid {
    grid-template-columns: 1fr;
  }
}
.runtime-canvas {
  width: 100%;
  height: 200px;
  display: block;
  background: #f6f8fb;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.runtime-chart-block {
  margin-bottom: 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.runtime-chart-title {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}
.runtime-chart-legend {
  margin: 4px 0 0;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.35;
}
.runtime-meta {
  margin: 0 0 12px !important;
}
.runtime-pick { min-width: 200px; }
.runtime-toolbar {
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
}
.runtime-dt {
  font: inherit;
  padding: 4px 8px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
}
.runtime-host {
  min-height: 200px;
  width: 100%;
}
.amap-host {
  width: 100%;
  height: 320px;
  background: #e8ecf0;
}
.amap-hint {
  padding: 12px 14px;
  font-size: 13px;
  color: var(--muted);
  background: #fff8e6;
  border-top: 1px solid var(--border);
}
.amap-hint.hidden { display: none; }
td.device-time {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.amap-marker-label {
  font-size: 11px;
  padding: 2px 6px;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 4px;
  white-space: nowrap;
}

.rail-schematic { padding: 16px 14px 20px; }
.rail-schematic-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 13px;
}
.rail-schematic-track {
  overflow-x: auto;
  padding-bottom: 8px;
}
.rail-schematic-stops {
  display: flex;
  align-items: flex-start;
  gap: 0;
  min-width: min-content;
  position: relative;
  padding-top: 8px;
}
.rail-schematic-stops::before {
  content: "";
  position: absolute;
  left: 24px;
  right: 24px;
  top: 22px;
  height: 4px;
  background: #cfd8e3;
  border-radius: 2px;
  z-index: 0;
}
.rail-stop {
  flex: 0 0 auto;
  width: 88px;
  text-align: center;
  position: relative;
  z-index: 1;
  opacity: 0.45;
}
.rail-stop.passed { opacity: 1; }
.rail-stop.passed .rail-stop-dot { background: var(--accent); box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.2); }
.rail-stop.next { opacity: 1; }
.rail-stop.next .rail-stop-dot {
  background: var(--warn);
  box-shadow: 0 0 0 4px rgba(180, 83, 9, 0.25);
  transform: scale(1.15);
}
.rail-stop-dot {
  display: block;
  width: 14px;
  height: 14px;
  margin: 0 auto 8px;
  border-radius: 50%;
  background: #adb5bd;
  transition: background 0.2s, transform 0.2s;
}
.rail-stop-name {
  display: block;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 4px;
}
.rail-stop-time {
  display: block;
  font-size: 10px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.rail-stop-trip {
  display: block;
  font-size: 10px;
  color: var(--accent);
  margin-top: 2px;
}
.rail-schematic-devs { margin-top: 12px; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
  padding: 12px 14px;
}

.devices-layout { display: grid; grid-template-columns: 1fr 320px; gap: 12px; align-items: start; }
.bind-panel .panel-body { padding: 12px 14px; }

.users-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }

.subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}
.subnav button {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 13px;
}
.subnav button.on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.perm-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
  margin: 8px 0 12px;
}
.perm-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text);
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
}

@media (max-width: 1100px) {
  .kpi-bar { grid-template-columns: repeat(2, 1fr); }
  .monitor-layout, .monitor-grid, .split-2, .devices-layout, .login-shell, .shell { grid-template-columns: 1fr; }
  .train-rail { max-height: none; flex-direction: row; flex-wrap: wrap; }
  .train-item { flex: 1; min-width: 160px; }
}