:root {
  --bg: #f3f5f7;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #6b7280;
  --line: #e5e7eb;
  --primary: #0f766e;
  --danger: #b91c1c;
  --ok: #047857;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #e8eef2, var(--bg));
  color: var(--text);
  min-height: 100vh;
  padding: 24px;
}

.hidden { display: none !important; }
.card, .panel, .top, .tabs {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.login-card {
  max-width: 420px;
  margin: 10vh auto;
  padding: 28px;
}
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  margin-bottom: 12px;
}
.tabs {
  display: flex;
  gap: 8px;
  padding: 8px;
  margin-bottom: 12px;
}
.tab {
  border: 0;
  background: transparent;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
}
.tab.active { background: #ccfbf1; color: #115e59; font-weight: 600; }
.panel { padding: 16px; }
h1, h3 { margin: 0 0 8px; }
.muted { color: var(--muted); margin: 0 0 12px; }
label { display: block; margin: 10px 0; font-size: 14px; }
input, select, textarea, button {
  font: inherit;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  width: 100%;
}
button { cursor: pointer; background: #f9fafb; width: auto; }
button.primary { background: var(--primary); color: white; border-color: var(--primary); }
.row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; align-items: center; }
.row input { flex: 1; min-width: 220px; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { border-bottom: 1px solid var(--line); padding: 10px 8px; text-align: left; vertical-align: top; }
.mono { font-family: ui-monospace, Consolas, monospace; word-break: break-all; }
.error { color: var(--danger); }
.ok { color: var(--ok); }
.actions {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.actions button {
  display: inline-block;
  margin: 0;
  padding: 6px 10px;
  font-size: 12px;
  width: auto;
  flex: 0 0 auto;
}
th:last-child,
td.actions {
  min-width: 180px;
  white-space: nowrap;
}
.pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
}
.pager #pageInfo { margin: 0; }
.page-size {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 13px;
}
.page-size select {
  width: auto;
  min-width: 72px;
  padding: 6px 8px;
}
#liability_agreement {
  width: 100%;
  min-height: 320px;
  line-height: 1.5;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.check { display: flex; align-items: center; gap: 8px; }
.check input { width: auto; }
dialog { border: none; border-radius: 12px; padding: 0; }
dialog::backdrop { background: rgba(0,0,0,.35); }
#deviceForm { padding: 20px; min-width: min(480px, 90vw); }