:root {
  --bg: #0f1419;
  --panel: #1a2029;
  --panel-2: #222b36;
  --border: #2c3744;
  --text: #e6edf3;
  --muted: #8b98a5;
  --accent: #4f9dff;
  --ok: #3fb950;
  --warn: #d29922;
  --danger: #f85149;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  font-size: 15px;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: rgba(15, 20, 25, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: baseline; gap: 10px; }
header h1 {
  font-size: 17px;
  margin: 0;
  font-weight: 600;
}
.brand .sub { font-size: 12px; color: var(--muted); }

.status-pills { display: flex; gap: 8px; align-items: center; }
.last-update { font-size: 11px; color: var(--muted); white-space: nowrap; }
.pill {
  font-size: 12px;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  white-space: nowrap;
}
.pill.on { color: var(--ok); border-color: rgba(63,185,80,0.4); }
.pill.off { color: var(--danger); border-color: rgba(248,81,73,0.4); }

main { padding: 16px; max-width: 1100px; margin: 0 auto; }

.btn {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: 0.15s;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #04101f; font-weight: 600; }
.btn.danger { color: var(--danger); border-color: rgba(248,81,73,0.4); }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------------- 集群总览 ---------------- */
.overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.stat .label { font-size: 12px; color: var(--muted); }
.stat .value { font-size: 26px; font-weight: 600; margin-top: 4px; }
.stat .value.ok { color: var(--ok); }
.stat .value.warn { color: var(--warn); }
.stat .value.danger { color: var(--danger); }
.stat .value.info { color: var(--accent); }

/* ---------------- 告警条 ---------------- */
.alerts { margin-bottom: 14px; }
.alert {
  display: flex; align-items: center; gap: 8px;
  background: rgba(248,81,73,0.08);
  border: 1px solid rgba(248,81,73,0.35);
  color: var(--danger);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 13px;
  margin-bottom: 8px;
}
.alert.warn {
  background: rgba(210,153,34,0.08);
  border-color: rgba(210,153,34,0.35);
  color: var(--warn);
}
.alert .dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }

.section-title {
  font-size: 14px; font-weight: 600; margin: 6px 0 12px;
  display: flex; align-items: center; gap: 8px;
}
.section-title .muted { font-weight: 400; color: var(--muted); font-size: 13px; }

/* ---------------- 主机网格 / 卡片 ---------------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.card.alert-border { border-color: rgba(248,81,73,0.5); }
.card.warn-border { border-color: rgba(210,153,34,0.5); }
.card > .dot { position: absolute; top: 12px; left: 12px; }
.card .title { font-weight: 600; font-size: 16px; }
.card .title.center { text-align: center; }
.card .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }
.tags { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.badge {
  font-size: 11px; padding: 2px 7px; border-radius: 6px;
  background: var(--panel-2); color: var(--muted); border: 1px solid var(--border);
}
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot.up { background: var(--ok); }
.dot.down { background: var(--danger); }
.dot.unknown { background: var(--muted); }

/* 环形仪表 */
.rings { display: flex; gap: 6px; justify-content: space-around; }
.ring { text-align: center; }
.ring .rlabel { font-size: 11px; color: var(--muted); margin-top: 2px; }

/* 迷你趋势线 */
.spark-wrap { margin-top: 2px; }
.spark-wrap .slabel { font-size: 11px; color: var(--muted); margin-bottom: 2px; }

.card .actions { display: flex; gap: 8px; margin-top: 4px; }
.card .actions .btn { flex: 1; }

/* ---------------- 模态框 ---------------- */
.modal {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
}
.modal[hidden] { display: none; }
.modal .box {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); width: 100%; max-width: 640px;
  max-height: 88vh; overflow-y: auto; padding: 18px;
}
.modal .box.wide { max-width: 960px; }
.modal .box h2 { margin: 0 0 12px; font-size: 18px; }
.modal .head { display: flex; justify-content: space-between; align-items: center; }

.section { margin: 12px 0; }
.section h3 {
  font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px;
  color: var(--accent); margin: 0 0 6px;
}
.section ul { margin: 0; padding-left: 18px; }
.section p { margin: 0; line-height: 1.5; white-space: pre-wrap; }
.kv { font-size: 13px; color: var(--muted); }

/* 详情：图表与关键指标 */
.charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 12px 0;
}
.chart-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
}
.chart-box .ctitle { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.chart-canvas-wrap { position: relative; width: 100%; height: 180px; }
.keystats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin: 12px 0;
}
.kpi { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; }
.kpi .k { font-size: 12px; color: var(--muted); }
.kpi .v { font-size: 18px; font-weight: 600; margin-top: 2px; }

.evidence {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px; background: #0b0f14; border: 1px solid var(--border);
  border-radius: 8px; padding: 10px; white-space: pre-wrap; margin: 6px 0;
}
.evidence .cmd { color: var(--accent); }
.evidence .meta { color: var(--muted); }

.form-row { display: flex; flex-direction: column; gap: 4px; margin: 8px 0; }
.form-row label { font-size: 12px; color: var(--muted); }
.form-row input, .form-row select {
  background: var(--panel-2); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px; padding: 8px; font-size: 14px;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.spinner {
  width: 18px; height: 18px; border: 2px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  display: inline-block; animation: spin 0.8s linear infinite; vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

.toast {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  background: var(--panel-2); border: 1px solid var(--border);
  padding: 10px 16px; border-radius: 10px; z-index: 100; font-size: 14px;
}
.toast.err { border-color: var(--danger); color: var(--danger); }
.empty { color: var(--muted); text-align: center; padding: 40px 0; }

@media (max-width: 640px) {
  .charts { grid-template-columns: 1fr; }
}