:root {
  --bg: #0f1115;
  --panel: #161a22;
  --panel-2: #1c2230;
  --line: #232a39;
  --text: #e6e8ee;
  --muted: #8b93a7;
  --accent: #6aa1ff;
  --ok: #4ade80;
  --bad: #f87171;
  --warn: #facc15;
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
        "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.centered {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 18px;
}

.login-card {
  width: 360px;
  max-width: 100%;
  text-align: center;
}
.login-card h1 { margin: 0 0 4px; font-size: 18px; }
.login-card form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
}
input, button, select, textarea {
  font: inherit;
  color: inherit;
}
input[type="password"], input[type="text"] {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  outline: none;
  transition: border-color 120ms ease;
}
input:focus { border-color: var(--accent); }

button {
  background: var(--accent);
  color: #0a0d14;
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.error {
  color: var(--bad);
  font-size: 13px;
  margin: 6px 0 0;
}
.footnote {
  color: var(--muted);
  font-size: 12px;
  margin-top: 14px;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: blur(8px);
  z-index: 5;
}
.brand { font-weight: 600; letter-spacing: 0.2px; }
.topbar nav { display: flex; gap: 18px; }
.topbar nav a { color: var(--muted); }
.topbar nav a:hover { color: var(--text); text-decoration: none; }
.topbar .logout { color: var(--bad); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

h2 { font-size: 16px; margin: 8px 0 14px; }
h3 { font-size: 14px; margin: 0 0 12px; color: var(--text); }

.grid { display: grid; gap: 12px; }
.kpis {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  margin-bottom: 18px;
}
.kpi {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.kpi-label { color: var(--muted); font-size: 12px; }
.kpi-value { font-size: 22px; font-weight: 600; margin-top: 4px; }
.kpi-value.ok  { color: var(--ok); }
.kpi-value.bad { color: var(--bad); }
.kpi-value button {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--line);
  padding: 4px 10px;
  font-size: 16px;
}

.two-col {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 800px) { .two-col { grid-template-columns: 1fr; } }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { color: var(--muted); font-weight: 500; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.status-ok  { color: var(--ok); }
.status-bad { color: var(--bad); }

.chart {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  align-items: end;
  gap: 6px;
  height: 160px;
  padding: 8px 4px 24px;
  position: relative;
}
.chart .bar {
  position: relative;
  display: flex;
  flex-direction: column-reverse;
  height: 100%;
  border-radius: 4px 4px 0 0;
  overflow: hidden;
  background: var(--panel-2);
}
.chart .bar .ok  { background: var(--ok); width: 100%; }
.chart .bar .bad { background: var(--bad); width: 100%; }
.chart .bar:hover::after {
  content: attr(data-label);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--line);
  padding: 4px 8px;
  border-radius: 6px;
  white-space: nowrap;
  font-size: 12px;
  pointer-events: none;
  z-index: 4;
}
.chart .label {
  position: absolute;
  bottom: 4px;
  left: 0; right: 0;
  text-align: center;
  font-size: 10px;
  color: var(--muted);
}

.docs pre {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
}
.docs code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
}
.docs p { margin: 8px 0; }
.docs ul { margin: 6px 0; padding-left: 20px; }