:root {
  --bg: #0d1117;
  --panel: #151b23;
  --panel-2: #1c2430;
  --border: #27303d;
  --text: #e6edf3;
  --muted: #8b98a8;
  --accent: #4f8cff;
  --accent-weak: rgba(79, 140, 255, .14);
  --success: #3fb68b;
  --warn: #d9a12b;
  --danger: #e5534b;
  --radius: 8px;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
}

/* 手机扫码登录弹层 */
.qr-login-box {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 10, 14, .6);
}
.qr-login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  text-align: center;
  max-width: 360px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, .45);
}
.qr-login-card canvas {
  width: 260px;
  height: 260px;
  image-rendering: pixelated;
  background: #fff;
  margin: 12px auto;
  display: block;
}
.qr-login-card .qr-url {
  font-size: 12px;
  word-break: break-all;
  color: var(--muted);
  margin: 8px 0 12px;
}
button {
  font: inherit;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 8px 14px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
button.ghost { background: transparent; }
button.small { padding: 4px 10px; font-size: 12px; }
input, select, textarea {
  font: inherit;
  color: var(--text);
  background: #0f141b;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
  width: 100%;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
label { display: grid; gap: 5px; color: var(--muted); font-size: 12px; }
code { font-family: var(--mono); font-size: 12px; background: #0b0f14; padding: 2px 6px; border-radius: 4px; }
h1, h2, h3 { margin: 0; font-weight: 650; letter-spacing: 0; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.grow { flex: 1 1 240px; }

/* login */
.login-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-card {
  width: min(400px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: grid;
  gap: 14px;
}
.brand-mark { width: 46px; color: var(--accent); }
.brand-mark svg { width: 100%; }
.login-card h1 { font-size: 24px; }
.login-sub { margin: -8px 0 6px; color: var(--muted); }
.form-error { color: var(--danger); min-height: 18px; margin: 0; font-size: 12px; }

/* app shell */
.app-view { height: 100vh; display: flex; flex-direction: column; }
.topbar {
  height: 52px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 12px; }
.brand-mini { font-weight: 700; font-size: 15px; }
.server-state {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 10px;
}
.server-state.online { color: var(--success); border-color: var(--success); }

.layout { flex: 1; min-height: 0; display: flex; }
.sidebar {
  width: 236px;
  flex: none;
  border-right: 1px solid var(--border);
  background: var(--panel);
  padding: 14px;
  overflow-y: auto;
}
.sidebar-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.sidebar-head h2 { font-size: 13px; color: var(--muted); font-weight: 600; }
.device-list { display: grid; gap: 8px; }
.device-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  text-align: left;
  padding: 10px 12px;
  display: grid;
  gap: 3px;
}
.device-item:hover { border-color: var(--accent); }
.device-item.active { background: var(--accent-weak); border-color: var(--accent); }
.device-item .name { font-weight: 600; display: flex; align-items: center; gap: 8px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); flex: none; }
.dot.online { background: var(--success); }
.dot.offline { background: var(--danger); }
.device-item .meta { font-size: 12px; color: var(--muted); }
.empty-tip { color: var(--muted); font-size: 13px; padding: 12px 4px; }

.main { flex: 1; min-width: 0; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 16px; }
.metric-strip { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; }
.metric {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: grid;
  gap: 4px;
  min-width: 0;
}
.metric .label { color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.metric .big { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }
.metric .sub { color: var(--muted); font-size: 11px; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); }
.tab {
  border: 0;
  background: transparent;
  border-radius: 0;
  color: var(--muted);
  padding: 10px 14px;
  border-bottom: 2px solid transparent;
}
.tab.active { color: var(--text); border-bottom-color: var(--accent); }
.tab-page { display: none; flex-direction: column; gap: 14px; }
.tab-page.active { display: flex; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.panel-head h3 { font-size: 14px; }
.panel-actions { display: flex; gap: 8px; }
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.chart-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.chart-panel canvas { width: 100%; height: 180px; display: block; }
.value { font-variant-numeric: tabular-nums; font-weight: 700; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 12px; position: sticky; top: 0; background: var(--panel); }
td:first-child, th:first-child { padding-left: 4px; }
tr:last-child td { border-bottom: 0; }

.status-pill {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 12px;
  border: 1px solid var(--border);
  color: var(--muted);
}
.status-pill.success, .status-pill.online, .status-pill.completed { color: var(--success); border-color: var(--success); }
.status-pill.error, .status-pill.failed, .status-pill.cancelled, .status-pill.offline { color: var(--danger); border-color: var(--danger); }
.status-pill.warning, .status-pill.pending_confirm, .status-pill.delivered { color: var(--warn); border-color: var(--warn); }
.status-pill.downloading, .status-pill.queued, .status-pill.running { color: var(--accent); border-color: var(--accent); }

.command-form .form-row, .form-row {
  display: flex;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.form-row label { flex: 1 1 180px; }
.preset-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.preset-btn { font-size: 12px; padding: 5px 10px; }
.preset-btn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-weak); }
.form-actions { display: flex; align-items: center; gap: 12px; }
.confirm-box { border: 1px solid var(--danger); border-radius: var(--radius); padding: 12px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.confirm-box p { margin: 0 12px 0 0; }

.download-list { display: grid; gap: 8px; }
.download-item { border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; }
.download-item .row1 { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.download-item .fname { font-weight: 600; word-break: break-all; }
.download-item .meta { color: var(--muted); font-size: 12px; }
.progress { height: 8px; background: #0b0f14; border-radius: 4px; overflow: hidden; margin: 8px 0; }
.progress > div { height: 100%; background: var(--accent); border-radius: 4px; transition: width .4s; }
.download-actions { display: flex; gap: 8px; }

.event-list { display: grid; gap: 0; max-height: 480px; overflow-y: auto; }
.event-item { display: grid; grid-template-columns: 72px 92px 1fr auto; gap: 10px; padding: 9px 4px; border-bottom: 1px solid var(--border); align-items: baseline; }
.event-item:last-child { border-bottom: 0; }
.event-time { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.event-type { font-size: 12px; color: var(--accent); }
.event-item .title { font-weight: 600; }
.event-item .message { color: var(--muted); font-size: 12px; word-break: break-all; }

.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.pairing-code { font-family: var(--mono); font-size: 28px; letter-spacing: 4px; color: var(--accent); padding: 12px 0; }
.switch-row { display: flex; align-items: center; justify-content: space-between; color: var(--text); font-size: 14px; }
.switch-row input { width: auto; accent-color: var(--accent); }

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  max-width: 360px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
  display: grid;
  gap: 2px;
  opacity: 0;
  transform: translateY(8px);
  transition: all .2s;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast .t-title { font-weight: 600; }
.toast .t-msg { color: var(--muted); font-size: 12px; }

@media (max-width: 960px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; border-right: 0; border-bottom: 1px solid var(--border); max-height: 170px; }
  .device-list { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .metric-strip { grid-template-columns: repeat(3, 1fr); }
  .chart-grid, .settings-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .metric-strip { grid-template-columns: repeat(2, 1fr); }
  .main { padding: 12px; }
  .event-item { grid-template-columns: 1fr auto; }
}