:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --text: #1d2330;
  --muted: #5b6475;
  --border: #d8dce3;
  --accent: #1f5fbf;
  --ok: #1b7a3a;
  --ok-bg: #e5f4ea;
  --warn: #8a5a00;
  --warn-bg: #fff3d6;
  --bad: #b3261e;
  --bad-bg: #fde7e5;
  --idle: #4a5262;
  --idle-bg: #eceef2;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }
body { margin: 0; }
a { color: var(--accent); }
h2 { margin: 0 0 12px; font-size: 1.25rem; }
h3 { margin: 0 0 8px; font-size: 1.05rem; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 8px; top: 8px; background: #fff; padding: 6px 10px; z-index: 10; }

.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 10px 20px; background: #16213a; color: #fff;
}
.topbar h1 { font-size: 1.05rem; margin: 0; white-space: nowrap; }
.topbar nav ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.topbar nav a { color: #d6def0; text-decoration: none; padding: 6px 12px; border-radius: 6px; }
.topbar nav a[aria-current="page"] { background: #2d3c60; color: #fff; font-weight: 600; }
.topbar nav a:focus-visible { outline: 2px solid #fff; }
.topbar .user { margin-left: auto; display: flex; gap: 10px; align-items: center; }

main { padding: 20px; max-width: 1400px; margin: 0 auto; }
main:focus { outline: none; }

button, .button {
  font: inherit; padding: 6px 14px; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--border); background: #fff; color: var(--text);
}
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { background: var(--bad); border-color: var(--bad); color: #fff; }
button:disabled { opacity: .55; cursor: not-allowed; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

input, select {
  font: inherit; padding: 6px 8px; border: 1px solid var(--border); border-radius: 6px; background: #fff;
}
label { font-weight: 500; }

.muted { color: var(--muted); }
.error { color: var(--bad); }

.grid { display: grid; gap: 16px; }
.grid.cards { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); }

.panel {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px;
}
.panel + .panel, .grid + .panel, .panel + .grid { margin-top: 16px; }
.grid > .panel { margin-top: 0; }

.card { border-left: 6px solid var(--idle); }
.card[data-state="ok"] { border-left-color: var(--ok); }
.card[data-state="warn"] { border-left-color: var(--warn); }
.card[data-state="bad"] { border-left-color: var(--bad); }
.card dl { margin: 8px 0 0; display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; font-size: .9rem; }
.card dt { color: var(--muted); }
.card dd { margin: 0; overflow-wrap: anywhere; }

.badge {
  display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: .85rem; font-weight: 600;
  background: var(--idle-bg); color: var(--idle);
}
.badge[data-state="ok"] { background: var(--ok-bg); color: var(--ok); }
.badge[data-state="warn"] { background: var(--warn-bg); color: var(--warn); }
.badge[data-state="bad"] { background: var(--bad-bg); color: var(--bad); }

table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; background: #fafbfc; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table-wrap { overflow-x: auto; }

.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; margin-bottom: 12px; }
.toolbar .field { display: flex; flex-direction: column; gap: 4px; }
.toolbar a.button { text-decoration: none; align-self: end; }
.pager { margin: 12px 0 0; align-items: center; }
.toolbar.wrap { align-items: start; }
.field-hint { margin: 0; font-size: .8rem; max-width: 300px; }
.field-hint:empty { display: none; }
.field.radios { border: 1px solid var(--border); border-radius: 6px; padding: 6px 10px; }
.field.radios legend { font-weight: 500; padding: 0 4px; }
input[aria-invalid="true"] { border-color: var(--bad); }
.actions-cell { white-space: nowrap; }
td audio { height: 32px; max-width: 220px; }

.chart { width: 100%; min-height: 240px; }
.chart-figure { margin: 0; }
.chart-figure figcaption h3 { margin-bottom: 4px; }
.chart-summary { margin: 6px 0 0; font-size: .85rem; }

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

.banner { border-left: 6px solid var(--idle); margin-bottom: 16px; }
.banner[data-state="ok"] { border-left-color: var(--ok); }
.banner[data-state="warn"] { border-left-color: var(--warn); }
.banner[data-state="bad"] { border-left-color: var(--bad); background: var(--bad-bg); }
.banner h2 { margin-bottom: 4px; }
.banner p { margin: 0; }

.grid.cards.three { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.events { list-style: none; margin: 0; padding: 0; font-size: .9rem; }
.events li { padding: 4px 0; border-bottom: 1px solid var(--border); }
.events time { color: var(--muted); font-variant-numeric: tabular-nums; }

.toast {
  position: fixed; right: 20px; bottom: 20px; max-width: 420px; padding: 10px 14px;
  border-radius: 8px; background: #16213a; color: #fff; opacity: 0; transform: translateY(10px);
  transition: opacity .2s, transform .2s; pointer-events: none;
}
.toast.show { opacity: 1; transform: none; }
.toast[data-kind="error"] { background: var(--bad); }

dialog { border: 1px solid var(--border); border-radius: 10px; padding: 20px; max-width: 520px; }
dialog::backdrop { background: rgba(10, 15, 30, .45); }
dialog .actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }

.login-body { min-height: 100vh; display: grid; place-items: center; }
.login-card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 28px; width: min(360px, 92vw); }
.login-card h1 { font-size: 1.2rem; margin: 0 0 16px; }
.login-card form { display: flex; flex-direction: column; gap: 8px; }
.login-card button { margin-top: 8px; }

@media (max-width: 760px) {
  .topbar { flex-wrap: wrap; gap: 8px; }
  .grid.two { grid-template-columns: 1fr; }
}

/* 配置页 */
textarea { font: inherit; font-family: ui-monospace, Menlo, Consolas, monospace; width: 100%; max-width: 640px;
  padding: 8px; border: 1px solid var(--border); border-radius: 6px; }
textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea[aria-invalid="true"] { border-color: var(--bad); }
.check { display: flex; gap: 8px; align-items: center; margin: 8px 0; }
.syntax { margin: 6px 0 12px; padding-left: 20px; font-size: .9rem; }
.syntax code, td code { background: var(--idle-bg); padding: 0 4px; border-radius: 4px; }
.warnings { color: var(--warn); margin: 8px 0; padding-left: 20px; }
.warnings:empty, .errors:empty { display: none; }
.errors { color: var(--bad); margin: 8px 0; padding-left: 20px; }
td.wrap { white-space: normal; min-width: 180px; }